Chernobyl Vs. Fukushima - Comparative Lessons For International Criminal Law

Author: LawSphereX

Category: Criminal Law

Published: 2026-08-23T18:46:58.170Z

Updated: 2026-08-30T07:07:14.652Z

CHERNOBYL VS. FUKUSHIMA: COMPARATIVE LESSONS

FOR INTERNATIONAL CRIMINAL LAW

Yashveena, Amity Law School, Amity University, Mohali, Punjab, India

ABSTRACT

Besides the horrifying nuclear catastrophes at Chernobyl (1986) and Fukushima (2011) that disclosed the terrible human and environmental impacts of nuclear disasters, the two incidents also unveiled the failures of the legal and institutional accountability mechanisms. While Chernobyl was primarily due to the systemic carelessness of the tightly controlled Soviet regime, Fukushima happened in a technologically advanced country, initiated by a natural calamity but made worse by the neglect of the regulations. The two cases point to the indispensable requirement to consider the accountability of those who are beyond the boundaries of countries. This study uses the doctrinal and comparative methods to study the two nuclear power accidents, Chernobyl and Fukushima to analyze nuclear accountability.

It delve into the causes, consequences, and responses to each catastrophe, and indicate the importance of state responsibility along with the global legal standards. The paper discusses in detail the overlap of nuclear accidents and international criminal law area, most notably the controversies of environmental destruction, crimes against humanity, and the recognition of “ecocide”. The comparative analysis shows that both nuclear and environmental law systems have procedures to handle the compensation and the liability of the state, but they lack the features to ensure that the perpetrators are held accountable at the international level.

The research paper claims that international criminal law, despite its present limitations, is a viable option for enhancing the responsibility of offenders, particularly through the legal acknowledgment of ecocide and by increasing the jurisdictional extent of the International Criminal Court (ICC). The study ultimately advances the discussion of worldwide nuclear control and the development of international criminal law (ICL). It provides suggestions that may improve the extent of international responsibility, close the voids revealed by these two disasters, and strengthen the legal structures to prevent the occurrence of such tragic events in the future. Keywords: Chernobyl, Fukushima, nuclear disasters, accountability, international criminal law, ecocide, state responsibility.

1 INTRODUCTION

While celebrated as an alternative to fossil fuels of unrestrained potential, nuclear energy comes with risks, some of which could lead to catastrophic events. In history, 1986 Chernobyl and

2011 Fukushima Daiichi disasters remain as some of the most damaging and enduring nuclear

accidents with devastating impacts to human health, the environment, and governance systems. Chernobyl, as the result of a poorly designed and maintained reactor, covered Europe in radioactive fallout and mandated mass evacuations of over 3 million people. It was the first publicized event that demonstrated the consequences of opacity, as well as the absence of diligence and competent governance in autocratic regimes. The opposite is true with Fukushima, which emerged as a consequence of the massive earthquake and tsunami. The IAEA’s Fukushima Report (2015)1 noted insufficient risk assessment, regulatory capture, and failure in crisis management. The lack of preparedness led to the cascading failure of institutional indifference, overestimation of defenses, and governance over managed risk.

Unlike Chernobyl’s secrecy, Fukushima was marked by initial transparency, but both cases revealed systemic governance gaps. The enduring consequences of both, and single handedly the most alarming, expand the parameters of discourse on accountability. Whether states can be held accountable on an international level for their actions? Whether individuals in the positions of authority can be prosecuted? Lastly, are the pre-existing international laws sufficient to deal with such cross-border damage? One of the main issues in the nuclear accountability discussion is the conflict between the power of individual states and overall global safety. This is the reason why such incidents are referred to as significant examples of both international criminal law jurisdiction and environmental governance.

1.1 Statement of the Research Problem

International law has usually handled nuclear issues through various treaties, including the Vienna Convention on Civil Liability for Nuclear Damage (1963), the Convention on Nuclear Safety (1994), and also through environmental law frameworks. Such regimes are, by and large, based on measures of compensation and prevention that do not cover the aspect of criminal accountability for actors that negligently did so or whose decisions directly contributed to nuclear catastrophes. 1Amano, Y. (2015). The Fukushima Daiichi Accident. International Atomic Energy Agency. https://wwwpub. iaea. org/MTCD/Publications/PDF/Pub1710-ReportByTheDG-Web. pdf The main question this paper tries to solve stems from the lack of an answer to the question: Who is accountable when nuclear accidents devastate populations and ecosystems?

It is possible to hold the state liable; nevertheless, enforcement is usually insufficient, and compensation mechanisms hardly ever get to the point of addressing the seriousness of human suffering and environmental destruction. At the same time, international criminal law does not consider environmental disasters in peacetime as crimes of concern. The establishment of crimes against humanity, war crimes, and genocide is quite clear; however, the notion of ‘ecocide’ or that of mass environmental destruction is still a matter of debate. Hence, this research is about whether international criminal law constitutes an appropriate model for solving nuclear disasters or whether different legal categories have to be there to ensure that the responsible ones can be held accountable.

1.2 Objectives

of the Study

1. To look into the what caused Chernobyl and Fukushima accidents and what were the effects

of these two disasters, from a legal and governance point of view.

2. To Dissect the accountability shutdown in both cases; concentrate on the particular account

of the state, reactive measures by the authorities, and the responses of the international community.

3. To explore how international criminal law could evolve to address nuclear disasters,

particularly through the debates on environmental crimes and “ecocide.”

4. To conduct a side-by-side study of the two disasters to illustrate the different governance

(i.e., Soviet centralized vs. Japanese democratic) that led to the outcome of the accountability.

1.3 Scope

and Limitations This study only focuses on the legal accountability dimensions of Chernobyl and Fukushima. The paper does not aim to supply the detailed scientific or technical side of the nuclear field, the impacts of radiation or the principles governing the hardware of the reactors. However, in the first place, the study centers on governance, responsibility, and international law. The paper enumerates:

1. The major historical, legal, and institutional factors that fed the two disasters.

2. The comparative assessment of state and international intelligence and action by a political

scientist.

3. The contribution of international criminal law towards clearing the accountability

ambiguities. On the other hand, the study is limited by the following:

1. The research concentrates on two specific nuclear disasters only and is a case study focus,

but the findings might have broader applications.

2. A reliance on doctrinal and secondary sources due to the limited availability of first-hand

archival materials, and certain classified state records.

3. The changes in international criminal law, especially among the issues leading to the concept

of ecocide as one of the juridical causes of global climate change, make some of the conclusions in this paper tentative rather than final.

2. THE CHERNOBYL DISASTER (1986)

2.1 Historical Background and Causes

On April 25 and 26, 1986, the erroneous decision of the operators of reactor Unit 4 to carry out an experiment which had not been thought through properly had some devastating consequences. Workers had disconnected the regulating power system along with the emergency safety mechanism, and with the reactor still functioning under 7% capacity, had managed to withdraw the bulk of the control rods from its core. Other mistakes from this point on were compounded by others and on the 26th of April, precisely at 1:23 AM, the core went out of control with the chain reaction. This resulted in an a series of elementary explosions that created a massive fireball whilst also dislodging the concrete and steel lid which housed the reactor.

This fireball along with the fire that engulfed the graphite core of the reactor caused an unprecedented release of radioactive material into the atmosphere, in addition to a partial core meltdown. On April 27 the 30,000 residents of Pryp'yat started to evacuate. The cover-up was attempted, but on April 28 Swedish monitoring stations detected unusually high levels of radioactivity carried by the wind and demanded an explanation. The Soviet government acknowledged an accident in Chernobyl, thereby initiating an international outcry about the risk being caused by the radioactive emissions. By May 4 both the heat and the radioactivity escaping from the reactor core were being sealed, though at enormous risk to workers.

Radioactive waste was buried at some 800 temporary locations, and in the fall of the year the extremely radioactive reactor core was sealed within a concrete-and-steel sarcophagus (it was subsequently found to be structurally unsound). 2 The disaster of the explosion was, in essence, the havoc of a design reactor which was of a defective nature and a lack in safety procedures. The event that took place on the night of April 25, 1986, was the safety test which aimed to find out how long turbines would continue to turn and produce electricity after a power loss. The test was poorly planned and carried out which, as a result, led to a chain of miscalculations. During the test, the staff of Reactor No. 4 made very wrong decisions leading to human errors. They deactivated safety systems and gave the reactor the permission to be at a very low power level, as a result, it was unstable.

Most of the disaster's elements were already present because of these factors. The Soviet Union's governance system, which was concentrated, had a big share in Ukrainian disaster. The practice of hiding the truth and being afraid discouraged reporting of the problems and following the safety protocols. Moreover, the lack of correct training for the reactor staff made the situation even worse. 3

2.2 Consequences of the accident

The significant effects of the Chernobyl accident fall within three categories: the physical effects in the way of health and environmental impacts; the psycho-social effects upon the populations involved; and the impact upon the nuclear industry globally. The physical effects make Chernobyl the location of the most serious nuclear accident to date. The explosions that ruined the Unit 4 reactor core liberated a cloud of radio-nucleoside that contaminated vast territories of Belarus, the Russian Federation and Ukraine. Hundreds of thousands of workers participated in attempts to reduce the impact of the accident, and

2 Martin, W. (2019). Chernobyl Disaster | Causes & Facts. In Encyclopædia Britannica. Britannica.

https://www.britannica.com/event/Chernobyl-disaster

3 The Chernobyl Disaster A Comprehensive Overview (docx) - CliffsNotes. (2024). Cliffsnotes.com.

https://www.cliffsnotes.com/study-notes/20862425 numerous closest whole-number estimates are presented below. These workers were exposed to significant radiation doses. The final numbers assembled in the Chernobyl Forum report are: at the scene of the accident, among the emergency rescuers 50 people died either of acute radiation syndrome in 1986 or because to other diseases in subsequent years. Some 4000 children and adolescents developed thyroid cancer from consumption of contaminated milk and other foods, and 15 of those children have died. All in all, with statistical modeling and estimates radiation workers and local community members received, there will eventually be 4000 deaths linked to the Chernobyl disaster. Further, the disaster's environmental consequences impacted agriculture, forestry, rivers, fish and all other living beings. In the 3 most damaged countries, almost 800

000 of agricultural land was in abeyance, and the cutting of forests was stopped in almost 700

000 ha. The personal and social consequences were also catastrophic. More than 100 000

individuals were instantly evacuated after the accident, and the number of people evacuated from the highly polluted zones rose to 340 000. Though radiation exposure was minimized, the trauma of these resettlements was massive. The third impact is the huge influence on the nuclear industry. Ten years earlier, the accident at Three Mile Island already raised concerns on the competence of nuclear power plant operators to prevent catastrophic accidents. Chernobyl was worse: the accident burnt itself into the public's imagination as evidence of the fact that nuclear safety could never exist. Several nations opted to scale down or stop further development of nuclear power plants, and the growth of nuclear power almost stopped. The industry took a huge hit in reputation which took almost two decades of strong safety performance to restore.4

2.3 State Response and International Reaction

The initial reaction of the Soviet government to the Chernobyl accident was characterized by secrecy, delay, and lack of openness. Even though the 26 April 1986 explosion at Reactor No.

4 happened, the evacuation of the nearby city of Pryp'yat was delayed for close to 36 hours,

putting residents in close proximity to dangerously high radiation levels for that duration.5 Residents were first kept in the dark, and official pronouncements massively understated the 4 International Atomic Energy Agency. (2006). Environmental Consequences of the Chernobyl Accident and Their Remediation: Twenty Years of Experience. https://www-pub.iaea.org/MTCD/publications/PDF/Pub1239_web.pdf

5 Plokhy, S. (2018). Chernobyl

The history of a nuclear catastrophe. New York: Basic Books. severity of the accident. Soviet doctors were even dissuaded from documenting radiation illness as the source of sickness, consistent with the state's broader attempt to cover up and deflect blame from systemic failure. 6 The Soviet government instead framed the accident as one that was mainly caused by the negligence of operators, hence scapegoating individual workers while refraining from admissions of inherent design weaknesses and lapses in regulation within the RBMK reactor system. 7 International pressure quickly necessitated that the Soviet Union drop its policy of denial. Radioactive fallout was detected for the first time in Sweden, nearly 1,000 kilometers distant, on 28 April 1986, which led Swedish authorities to request an explanation from Moscow.

8 With growing international attention, the Soviet Union eventually admitted officially that there had been an accident, but only after it had already affected several European countries. The delayed announcement evoked strong criticism from the governments of Europe and highlighted the risks of transboundary nuclear pollution. The International Atomic Energy Agency (IAEA) organized a post-accident review meeting in August 1986, stressing the importance of international cooperation, openness, and uniform safety practices. 9 These advances prompted the signing of two important international instruments: the Convention on Early Notification of a Nuclear Accident (1986) and the Convention on Assistance in the Case of a Nuclear Accident or Radiological Emergency (1986).

10 The Notification Convention obliged states to promptly exchange information regarding nuclear accidents that may have transboundary implications, while the Assistance Convention provided a structure for technical and humanitarian assistance in nuclear emergencies. While these conventions were an important step forward, they were criticized for being more procedural than substantive because they did not hold responsible states liable or enforce stringent responsibility. 11 While Chernobyl spurred an international movement toward increased cooperation in nuclear safety, it also uncovered persistent weaknesses in the international legal

6 Brown, K. (2019). Manual for survival

A Chernobyl guide to the future. New York: W.W. Norton.

7 Medvedev, Z. (1990). The legacy of Chernobyl. New York

W.W. Norton.

8 David Marples, The Social Impact of the Chernobyl Disaster (St. Martin’s Press 1988) 33.

9 IAEA, Summary Report on the Post-Accident Review Meeting on the Chernobyl Accident (Safety Series No. 75- INSAG-1, Vienna 1986). 10 Convention on Early Notification of a Nuclear Accident, 1439 UNTS 275 (adopted 26 September 1986, entered into force 27 October 1986); Convention on Assistance in the Case of a Nuclear Accident or Radiological Emergency, 1457 UNTS 133 (adopted 26 September 1986, entered into force 26 February 1987). 11 Patricia Birnie, Alan Boyle, and Catherine Redgwell, International Law and the Environment (3rd edn, OUP

2009) 338–340.

framework to handle nuclear catastrophes.

2.4 Accountability and Legal Challenges

Accountability after the Chernobyl disaster was made more complex by the political organization of the Soviet Union, because of its secrecy culture, and a lack of international liability mechanisms for nuclear-related accidents. Accountability in the domestic sphere was restricted to criminal prosecution against a limited number of plant officials. In 1987, some of the top Chernobyl personnel, such as plant director Viktor Bryukhanov and chief engineer Nikolai Fomin, were convicted of serious breaches of safety rules and given prison terms. 12 These charges, however, were generally seen as scapegoating: punishing those at the working level while protecting system issues in reactor design, regulatory supervision, and political decision-making from accountability.

13 No high-ranking government officials or policymakers were criminally held accountable, even though there was evidence that risky practices and design flaws in RBMK reactors had been familiar in scientific and administrative communities prior to the accident. 14 In the international sphere, Chernobyl revealed a deep legal vacuum. Radioactive fallout extended beyond the Soviet Union, covering much of Europe, but no binding international regime regulated trans-boundary nuclear harm in 1986. Neighbouring countries lacked a clear vehicle to claim compensation or determine state responsibility, since principles of transboundary environmental damage under customary international law (such as the Trail Smelter principle) had not yet been codified in a nuclear framework.

15 The International Court of Justice was not consulted, and no formal inter-state claims were presented, in part because of the political preoccupations of the Cold War. The lack of litigation highlighted both the geopolitical limitations of the period and the practical challenge of linking harm across borders. The legal issues resulting from Chernobyl also concerned issues of causation and proof. Providing direct causation between radiation exposure and long-term health effects, including thyroid cancers and genetic damage, was challenging in courts, considering scientific doubts

12 Medvedev, Z. (1990). The legacy of Chernobyl. New York

W.W. Norton.

13 Plokhy, S. (2018). Chernobyl

The history of a nuclear catastrophe. New York: Basic Books.

14 Brown, K. (2019). Manual for survival

A Chernobyl guide to the future. New York: W.W. Norton.

15 Birnie, P. , Boyle, A. , & Redgwell, C. (2009). International law and the environment (3rd ed. ). Oxford: Oxford University Press. See also Trail Smelter Arbitration (United States v. Canada), 3 RIAA 1905 (1938/1941). and absence of open Soviet medical records. 16 Compensation for victims inside the USSR was ad hoc, disconnected, and politically discretionary, leaving numerous impacted individuals without proper remedies. 17 In addition, there was no acknowledgment during the time of environmental damage as an issue of international criminal law; discussions about "ecocide" were still at early stages, and the Rome Statute of the International Criminal Court (1998) was more than a decade ahead. As a result of the Chernobyl incident, a slew of unresolved legal issues arose.

These issues include the propensity of nations to shift systemic blame onto scapegoats, the narrow options for legal aid available to victims of nuclear disasters, and the ineffectiveness of international law to deal with cross-border damage. Chernobyl induced a number of significant normative changes. These changes included the 1986 Convention on Early Notification of a Nuclear Accident and the Convention on Assistance in the Case of a Nuclear Accident or Radio-logical Emergency. These changes, however, were procedural and not focused on liability. Chernobyl’s victims were left with little or no compensation, and this lack of international and national legal accountability exposed the need for more stringent laws pertaining to the safety and liability of nuclear systems.

3. THE FUKUSHIMA DISASTER (2011)

3.1 Historical Background and Causes

The Fukushima Daiichi nuclear accident of March 2011 was the second most serious nuclear disaster in history after Chernobyl (1986). Situated on Japan's Pacific coast in Fukushima Prefecture, the plant, which was owned by the Tokyo Electric and Power Company (TEPCO), had six boiling-water reactors, of which three were operational at the time the accident occurred. On 11 March, a powerful earthquake and tsunami knocked out backup generators, powering down cooling systems on reactors 1–3. Although the reactors were successfully closed down, residual heat led to fuel rods overheating and partial meltdowns, radiation releases, and hydrogen explosions in reactors 1 and 3. On late May, it was confirmed that melted fuel dug holes into containment vessels, exposing nuclear cores.

Efforts to cool the reactors included pumping seawater and boric acid, but recurring explosions and fires, one in 16 Baverstock, K. , & Williams, D. (2006). The Chernobyl accident 20 years on: An assessment of the health consequences and the international response. Environmental Health Perspectives, 114(9), 1312–1319. https://doi. org/10. 1289/ehp. 8937

17 Marples, D. R. (1988). The social impact of the Chernobyl disaster. New York

St. Martin’s Press. spent fuel pool 4, further aggravated the situation. The authorities evacuated almost 600 square km around the plant, displacing over 47,000 residents and subsequently advising those in the

30 km area to stay indoors. Laborers were exposed when water cannons and helicopters were

employed to cool the reactors, even though operations were regularly halted by radiation spikes. Over the subsequent weeks, contamination branched out beyond the site, as radioactive traces were detected in food, water, and the Pacific Ocean because of cracks in the tunnels leaking radioactive material. The evacuation area was widened to 30 km, and radioactive water was diverted to storage once the cracks had been sealed. The International Atomic Energy Agency increased the level of crisis on April 12 to level 7, comparable to Chernobyl. In December 2011, Prime Minister Yoshihiko Noda announced that reactors had reached cold shutdown, but radioactive fallout made huge tracts uninhabitable for generations. There was an evacuation of a 207 square km corridor beyond the 20-km one, though some "difficult-toreturn" areas remained sealed.

Gradual resettlement commenced in 2013, and by the time of March 2017, all evacuation orders except within the most polluted areas were removed. Marine pollution gradually fell, although some, such as rockfish, continued to have higher levels of radiation. A secondary accident in August 2013, resulting from a leak of 300 tonnes of irradiated water, was rated as a level-3 incident. The Fukushima accident brought to light the weaknesses of nuclear power plants against natural disasters, displacing thousands, contaminating the environment, and incurring a legacy of long-term human, environmental, and regulatory issues despite ultimate stabilizing measures. 18

3.2 Consequences

Human, Environmental, and Legal Dimensions The March 2011 Fukushima Daiichi nuclear accident had far-reaching effects that went beyond direct physical harm. Its effects can be classified into human, environmental, and legal aspects, each indicating the richness of dealing with nuclear catastrophes. The crash relocated over 150,000 individuals from Fukushima Prefecture, with evacuation areas stretching up to 30 km of the plant. 19 Numerous evacuees experienced protracted displacement, disruption of livelihoods, and mental distress because of uncertainty regarding the safety of their residences. Though no radiation deaths were directly reported, there were 18Fukushima accident. (2011). In Encyclopedia Britannica. https://www. britannica. com/event/Fukushimaaccident 19 World Nuclear Association. (2023). Fukushima Daiichi accident. Retrieved from https://worldnuclear.

org/information-library/safety-and-security/safety-of-plants/fukushima-daiichi-accident. aspx over 1,000 evacuation-related fatalities in subsequent months that were mainly caused by stress, insufficient medical attention, and compromised living conditions. There were also longterm public health issues, such as possible elevations in cancer risks, particularly thyroid cancer in children who ingested radioactive iodine, although later studies revealed no significant increase due to the accident itself. 20 The environmental impact was severe and long-lasting. Gigantic tracts of land were infested with cesium-137, making them unlivable for decades. 21 Radioactive water seeped into the Pacific Ocean, also infecting marine ecosystems and fishing industries.

Although levels of radioactivity in marine produce dropped gradually with the passage of years, species like rock fish still harbored high concentrations of contamination. 22 Forests and soil also became sites of radioactivity reservoirs, making decontamination difficult. The accident therefore constituted an enduring environmental problem, with areas being classified as "difficult-to-return" zones that remain closed years since the accident. The Fukushima accident revealed areas of inadequacy within Japan's nuclear regulatory system. Before the disaster, TEPCO and government regulators had been accused of sloppy safety regulation and poor disaster preparedness. 23 Japan reacted by creating the Nuclear Regulation Authority (NRA) in 2012, implementing tougher safety standards and insulation from industry pressure.

Globally, the disaster renewed debates around nuclear safety, liability, and compensation. TEPCO was hit with huge legal suits filed by evacuees and local authorities, Japanese courts increasingly deeming the state partially responsible for not enforcing stronger safety practices. 24 The accident impacted world nuclear policy, prompting some nations, including Germany, to speed up their nuclear exit. In general, the Fukushima accident put into prominence the interlinked human, environmental, and legal ramifications of nuclear accidents. It called to mind not just the weaknesses of technological systems in response to natural 20 United Nations Scientific Committee on the Effects of Atomic Radiation. (2014). UNSCEAR 2013 report: Sources, effects and risks of ionizing radiation. United Nations. https://www. unscear. org/unscear/en/publications/2013_1.

html 21 International Atomic Energy Agency. (2015). The Fukushima Daiichi accident: Report by the Director General. IAEA. https://www. iaea. org/publications/10962/the-fukushima-daiichi-accident

22 Buesseler, K. O. (2014). Fukushima and ocean radioactivity. Oceanography, 27(1), 92–105.

https://doi.org/10.5670/oceanog.2014.02 23 Kingston, J. (2012). Japan’s nuclear village. The Asia-Pacific Journal: Japan Focus, 10(37), 1–25. https://apjjf.org/2012/10/37/Japan-Focus/3835/article.html 24 Foote, D. H. (2021). The Fukushima nuclear disaster and the scope of state liability in Japan. Asian Journal of Law and Society, 8(1), 57–78. https://doi.org/10.1017/als.2020.41 disasters but also the long-lasting burden imposed on communities and governments that are affected.

3.3 State Response and International Reaction

The very first reaction of the Japanese government to the Fukushima Daiichi accident in March

2011 was the announcement of a nuclear emergency, swift evacuations, and efforts to stabilize

reactors. First, those in the immediate vicinity within a 3-km area were evacuated, but it later widened to 20 km, then to 30 km, finally displacing more than 150,000 individuals. 25 Emergency actions included injecting seawater and boric acid into boiling reactor cores, sending Self-Defense Forces to cool reactors, and creating exclusion zones. Prime Minister Naoto Kan stepped in personally to stop TEPCO from leaving the site, highlighting state takeover during the crisis. 26 Cold shutdown was attained by December 2011, and in 2012, the Nuclear Regulation Authority (NRA) was established to supplant the tarnished Nuclear and Industrial Safety Agency, with a charge for tighter regulation. 27 Internationally, the meltdown elicited alarm and cooperation.

Neighbor states increased vigilance of radiation levels, and the International Atomic Energy Agency (IAEA) sent missions to evaluate and exchange lessons. 28 The European Union conducted "stress tests" on its nuclear facilities, while Germany sped up its phase-out of nuclear power and Italy cancelled its nuclear renaissance plans. 29 Other nations, such as China, India, and the United States, continued to pursue their nuclear programmes but tightened safety procedures. 30 In this way, Fukushima prompted Japan to reform its regulatory structure and compelled the global community to rethink nuclear safety and energy policy decisions.

3.4 Accountability and Legal Challenges

Fukushima Daiichi highlighted urgent issues of accountability for the performance of Tokyo 25 World Nuclear Association. (2023). Fukushima Daiichi accident. https://world-nuclear. org/informationlibrary/safety-and-security/safety-of-plants/fukushima-daiichi-accident. aspx 26 Kingston, J. (2012). Japan’s nuclear village. The Asia-Pacific Journal: Japan Focus, 10(37), 1–25. https://apjjf. org/2012/10/37/Japan-Focus/3835/article. html 27 Foote, D. H. (2021). The Fukushima nuclear disaster and the scope of state liability in Japan. Asian Journal of Law and Society, 8(1), 57–78. https://doi. org/10. 1017/als. 2020. 41 28 International Atomic Energy Agency. (2015). The Fukushima Daiichi accident: Report by the Director General. IAEA. https://www. iaea. org/publications/10962/the-fukushima-daiichi-accident 29 European Commission. (2012).

Communication on the comprehensive risk and safety assessments (“stress tests”) of nuclear power plants in the EU. Brussels. 30 Schneider, M. , & Froggatt, A. (2012). The World Nuclear Industry Status Report 2012. Mycle Schneider Consulting Project.

Electric Power Company (TEPCO), regulators, and the government of Japan. Criticism was rampant against TEPCO for an incomplete implementation of safety mechanisms, even after it had received warnings on seismic and tsunami threats. 31 Claims by evacuees and residents exposed to radiation demanded compensation for health hazards, displacement, and livelihood loss. In 2019, three ex-TEPCO executives were acquitted by a Tokyo District Court of criminal negligence, holding that the scale of the tsunami was unexpected, but in 2022, TEPCO and four former directors were ordered by a civil court to pay ¥13 trillion damages, one of Japan's largest-ever civil liabilities. 32 The cases indicated the challenge of establishing criminal responsibility in technological catastrophes but left the compensatory role for civil law even stronger.

The Japanese government also came under fire for poor pre-disaster regulatory effectiveness and poor crisis communication, resulting in the reforms the creation of an independent Nuclear Regulation Authority. 33 Globally, the accident re-opened the argument over state responsibility and trans-boundary damage. Though radioactive releases extended beyond the Japanese mainland, no official international claims had been made, which was indicative of the weakness of current legal provisions under treaties like the Vienna Convention on Civil Liability for Nuclear Damage and the Convention on Early Notification of a Nuclear Accident. 34 The absence of strong international accounting mechanisms highlighted the dependence on national law for compensation.

Academics state that Fukushima serves to underscore the urgency for more effective doctrines of corporate and governmental responsibility in nuclear regulation, filling the lacuna between national regimes of liability and trans-boundary dangers of nuclear accidents. 35 31 Kingston, J. (2012). Japan’s nuclear village. The Asia-Pacific Journal: Japan Focus, 10(37), 1–25. https://apjjf. org/2012/10/37/Japan-Focus/3835/article. html 32 McCurry, J. (2022, July 13). Former TEPCO executives ordered to pay ¥13tn over Fukushima disaster. The Guardian. https://www. theguardian. com/environment/2022/jul/13/former-tepco-executives-ordered-to-pay-13tnover-fukushima-disaster 33 Foote, D. H. (2021). The Fukushima nuclear disaster and the scope of state liability in Japan. Asian Journal of Law and Society, 8(1), 57–78. https://doi. org/10. 1017/als. 2020. 41 34 International Atomic Energy Agency.

(2015). The Fukushima Daiichi accident: Report by the Director General. IAEA. https://www. iaea. org/publications/10962/the-fukushima-daiichi-accident 35 Gillespie, J. (2014). Legal accountability and nuclear disaster: Lessons from Fukushima. Environmental Law Review, 16(3), 169–185. https://doi. org/10. 1350/enlr. 2014. 16. 3. 169 4.

COMPARATIVE

ANALYSIS

CHERNOBYL VS. FUKUSHIMA

4.1 Nature of the Disasters

Negligence vs. Natural Catastrophe One key difference between the Chernobyl and Fukushima nuclear disasters is their causes. Chernobyl was primarily the product of human oversight and defective reactor design. The absence of any safety characteristics in the RBMK reactor, along with irresponsibly hasty safety tests under duress, paved the way for catastrophe. 36 By contrast, Fukushima was triggered by a record natural disaster, the 2011 Tōhoku earthquake and tsunami. However, though the triggering event at Fukushima was environmental, subsequent investigations emphasized that the effects were compounded by regulatory capture, corporate smugness, and a lack of disaster preparedness.

37 So, while Chernobyl represents the perils of human negligence and institutional secrecy, Fukushima depicts the legal and moral challenges of "compound catastrophes" where natural occurrences combine with institutional malady. This difference matters for international criminal law: while Chernobyl implies immediate responsibility for negligence, Fukushima complicates questions regarding foreseeability and liability scope when natural hazards are paramount.

4.2 State Responsibility in Nuclear Accidents

Both tragedies exposed state responsibility weaknesses, but in different ways. Within the Soviet Union, information was withheld, evacuations were postponed, and plant-level officials alone were criminally prosecuted, without extending accountability to deeper systemic levels.38 Globally, the USSR suffered no binding sanctions, as state responsibility doctrines for transfrontier nuclear injury were underdeveloped and Cold War politics short-circuited litigation.39 Japan, on the other hand, was more open to the global community, providing information to the International Atomic Energy Agency (IAEA) and collaborating on safety regulations. Internally, though, TEPCO's intimate relationship with the Japanese government and the

36 Medvedev, Z. (1990). The legacy of Chernobyl. New York

W.W. Norton.

37 National Diet of Japan Fukushima Nuclear Accident Independent Investigation Commission (NAIIC). (2012). The official report of the Fukushima Nuclear Accident Independent Investigation Commission. Tokyo.

38 Plokhy, S. (2018). Chernobyl

The history of a nuclear catastrophe. New York: Basic Books.

39 Birnie, P., Boyle, A., & Redgwell, C. (2009). International law and the environment (3rd ed.). Oxford: Oxford University Press. government's mismanagement of the crisis exposed regulatory failure. Japanese courts held the state partially accountable for not being able to foresee tsunami risks in some instances, although liability was diluted by the challenge of assigning blame for natural dangers.40 In comparison, Chernobyl illustrates state evasion of responsibility through secrecy and scapegoating, whereas Fukushima presents partial acknowledgment of state liability, but this is restricted by the uncontrollable nature of natural disasters. The two both emphasize the insufficiency of international mechanisms in ensuring state responsibility for nuclear damage.

4.3 Role of International Legal Norms in Both Cases

Both Chernobyl and Fukushima influenced the course of global legal standards on nuclear safety. After Chernobyl, the Convention on Early Notification of a Nuclear Accident and the Convention on Assistance in the Case of a Nuclear Accident or Radiological Emergency (1986) were accepted. But both these conventions centered on procedural obligations (notification and assistance) instead of substantive liability. 41 Since there were no strong frameworks in place, victims were hardly compensated across borders. Fukushima, although less transboundary in scope, reaffirmed arguments for more stringent international standards. The IAEA tightened up safety review procedures, and countries reconsidered national nuclear policy, but no binding global liability regime existed once again.

42 Significantly, neither disaster led to state-to-state litigation, demonstrating the continued inadequacy of international law to resolve transboundary nuclear damage. Compared to each other, Chernobyl drove the emergence of baseline procedural standards, and Fukushima pointed to the persistent gap in substantive accountability and compensation to victims. Both disasters highlight that international law developed reactively and has only limited potential to address either negligence-caused or natural-hazardinduced nuclear disasters.

5. INTERNATIONAL CRIMINAL LAW PERSPECTIVE

5.1 Environmental Harm as an Emerging International Crime

The Chernobyl and Fukushima accidents highlight the international implications of massive 40 Imai, T. (2019). Nuclear disaster litigation and justice in Japan: Lessons from Fukushima. Journal of Japanese Law, 47(1), 77–101. 41 International Atomic Energy Agency (IAEA). (1986). Convention on early notification of a nuclear accident. Vienna: IAEA.

42 International Atomic Energy Agency (IAEA). (2015). The Fukushima Daiichi accident. Vienna: IAEA.

environmental damage. International criminal law (ICL), however, has traditionally concentrated on central crimes—genocide, crimes against humanity, war crimes, and aggression—with the rest, including environmental destruction, in most cases being marginal. Environmental destruction has indirectly been addressed in some circumstances, such as war environmental destruction under Article 8(2)(b)(iv) of the Rome Statute, but there is no standalone international crime targeting peacetime environmental disasters. 43 Scholars and policymakers alike have increasingly called for the recognition of environmental damage as an independent international crime, especially when state or corporate actors pursue reckless activities with predictable disastrous results.

44 This lack of gap is highlighted clearly in the case of nuclear disasters: although damage is transboundary, serious, and long-lasting, there is no forum to criminally prosecute responsible actors outside of domestic frameworks.

5.2 Crimes Against Humanity and the Debate on “Ecocide”

Some have argued that nuclear accidents should be brought within crimes against humanity, under which reckless conduct causes widespread damage to civilian populations. 45 But this entails establishing a "widespread or systematic attack directed against civilians," which does not usually exist in negligence or failure of regulation cases. The term "ecocide" has been proposed as the fifth international crime. In 2021, an expert group characterized ecocide as "unlawful or wanton acts done in knowledge that there is a substantial risk of causing serious and either widespread or long-term environmental harm. "46 Nuclear accidents, especially those associated with avoidable negligence or regulatory inaction, might conceivably be within this definition.

However, ecocide is still not incorporated in the Rome Statute, and states remain split on whether it should be within its scope and enforceability. 47 Chernobyl is an example of where irresponsible human behavior could constitute ecocide, while Fukushima represents the challenge of categorization when natural risk meets 43 Rome Statute of the International Criminal Court, art. 8(2)(b)(iv), July 17, 1998, 2187 U. N. T. S. 90. 44 Gray, C. (2016). Environmental crimes and international criminal law. Leiden Journal of International Law, 29(3), 879–896. https://doi. org/10. 1017/S0922156516000330 45 Drumbl, M. A. (1998). Waging war against the world: The need to move from war crimes to environmental crimes. Fordham International Law Journal, 22(1), 122–160. 46 Independent Expert Panel for the Legal Definition of Ecocide. (2021). Commentary and core text of the definition of ecocide.

Stop Ecocide Foundation. 47 Sands, P. , & Peel, J. (2012). Environmental protection in international law: Emerging norms and challenges. International & Comparative Law Quarterly, 61(3), 697–708. institutional failure. Both examples point to the role of ecocide in bridging accountability gaps in ICL.

5.3 The Role and Jurisdiction of the International Criminal Court (ICC)

The International Criminal Court (ICC) is, at present, the primary forum for prosecuting international crimes. Its jurisdiction does extend to genocide, crimes against humanity, war crimes, and aggression, but not in a clear way to environmental catastrophes outside of armed conflict.48 There are serious obstacles in bringing nuclear accidents under current categories, ie, War crimes need an armed conflict nexus, Crimes against humanity need purposeful or systematic attack, which nuclear disasters do not typically meet and Genocide and aggression are not relevant to such situations. The ICC could in theory prosecute environmental damage in the event that ecocide was incorporated as a fifth crime. But there are still jurisdictional problems like would nuclear states ratify such an amendment, and how would responsibility be distributed between states, corporations, and individuals?49

5.4 Limitations of the Existing ICL Framework for Dealing with Nuclear Disasters

The current ICL framework is based on four major limitations in dealing with nuclear disasters:

1 Lack of substantive norms

No clear international crime of environmental disaster in peacetime.50

2 Problems with attribution

It is challenging to attribute criminal responsibility where disasters are caused by a combination of human error, business culture, and natural disasters.

3 Corporate liability gap

The ICC only prosecutes natural persons while excluding corporations like TEPCO from its ambit.

4 Political resistance

Including ecocide or nuclear negligence within the scope of ICL is met 48 International Criminal Court. (2016). Policy paper on case selection and prioritisation. The Hague: ICC. 49 Higgins, R. (2019). Nuclear disasters and international criminal law: The case for ecocide. Journal of International Criminal Justice, 17(5), 1043–1062. 50 Schabas, W. A. (2017). An introduction to the International Criminal Court (5th ed. ). Cambridge: Cambridge University Press. with resistance by influential nuclear states that are averse to international oversight. Accordingly, while the nuclear accidents graphically convey the international stakes of environmental damage, ICL continues to be insufficiently prepared to afford remedies.

Chernobyl and Fukushima both illustrate the call for reform: either through the codification of ecocide, the extension of liability of corporations, or the development of hybrid mechanisms of accountability at the crossroads of environmental and criminal law.

6. LESSONS AND FUTURE DIRECTIONS

6.1 Strengthening Global Nuclear Governance and Safety Norms

Together, the Chernobyl and Fukushima accidents underscore the weakness of current nuclear safety regimes. Although the Convention on Early Notification of a Nuclear Accident (1986) and later IAEA efforts enhanced transparency, these are still procedural and not substantive tools.51 Neither accident produced cross-border harm that was legally binding for liability, with victims relying on national remedies. Strengthening international nuclear governance thus demands more transparent liability regimes, tighter compliance controls, and greater international monitoring. Options are to update the Vienna Convention on Civil Liability for Nuclear Damage and increase the IAEA's role in external inspections.52

6.2 Need for Recognition of “Ecocide” in International Criminal Law

Chernobyl and Fukushima revealed the weakness of existing ICL in tackling massive environmental damage. The suggested declaration of ecocide as a fifth foundational international crime provides a normative avenue for responsibility. By enshrining serious environmental harm caused by negligence, recklessness, or intentional conduct, ecocide has the potential to bridge the space between moral condemnation and legal enforceability. 53 Nuclear catastrophes, owing to their transboundary and prolonged effects, squarely fit into this category. Recognition of ecocide would not only discourage reckless conduct but also indicate 51 International Atomic Energy Agency (IAEA). (1986). Convention on early notification of a nuclear accident. Vienna: IAEA. 52 Pelzer, N. (2013). International nuclear law: History, evolution, outlook. Nuclear Law Bulletin, 91(1), 7–34. https://doi. org/10.

1787/nlb-2013-5jz0t4n1c9zv 53 Independent Expert Panel for the Legal Definition of Ecocide. (2021). Commentary and core text of the definition of ecocide. Stop Ecocide Foundation. the international community's determination to secure the environment as a common good. 54

6.3 Expanding Corporate Criminal Responsibility under ICL

A further key lesson is the necessity to deal with corporate accountability. State immunity was reserved in Chernobyl, whereas in Fukushima, the executives of TEPCO dodged criminal responsibility despite universal acknowledgment of systemic sloppiness. The ICC only prosecutes natural persons today, excluding corporations from its scope.55 To expand ICL to cover corporate criminal responsibility—like in some national systems—would bring accountability measures into consonance with the operative realities of transnational industries, especially in dangerous sectors like nuclear power. This change would provide that corporations are held directly responsible for regulatory violations and disastrous harm.56

6.4 Policy Recommendations for States and International Bodies

Based on the comparative lessons of Fukushima and Chernobyl, the following policy directions emerge: l For States, to increase domestic regulatory autonomy and transparency to avoid regulatory capture. Make corporate disaster-readiness plans mandatory with legal penalties for noncompliance and Implement national compensation regimes ensuring timely and sufficient remedies to victims. l For International Bodies, to enhance IAEA's enforcement capacity beyond voluntary compliance. Encourage adoption of binding regimes of liability for transboundary nuclear damage. Urge negotiations for the addition of ecocide to the Rome Statute and to promote discussions for the inclusion of corporate liability in ICL regimes.

Together, these reforms would form a stronger, fairer, and more accountable regime of nuclear control, the one that values the environment not as an afterthought but as the paramount subject of international legal concern. 54 Sands, P. , Peel, J. , Fabra, A. , & MacKenzie, R. (2018). Principles of international environmental law (4th ed. ). Cambridge: Cambridge University Press. 55 Schabas, W. A. (2017). An introduction to the International Criminal Court (5th ed. ). Cambridge: Cambridge University Press. 56 Clapham, A. (2008). Extending international criminal law beyond the individual to corporations and armed opposition groups. Journal of International Criminal Justice, 6(5), 899–926. https://doi. org/10. 1093/jicj/mqn080

7 CONCLUSION

The comparative analysis of the Chernobyl and Fukushima accidents discloses similarities as well as differences in the ways nuclear accidents happen and are dealt with legally and institutionally. Chernobyl showed the risks of systemic carelessness, cover-up, and poor governance, while Fukushima highlighted how even sophisticated regulatory schemes can collapse when faced with natural disasters complicated by corporate incompetence. Both instances illustrated the inter-generational and transboundary aspect of nuclear damage, one that current domestic and international mechanisms are not capable of dealing with. The paper also proved that international interventions, progressive in developing conventions on assistance and notification, are essentially procedural and do not deliver substantive accountability.

This paper contributes to International Criminal Law by placing nuclear accidents in the context of debates surrounding environmental damage, crimes against humanity, and the envisioned crime of ecocide. It illustrates that although existing ICL frameworks privilege human-focused atrocities like genocide and war crimes, the magnitude and extent of nuclear disasters necessitate a broader definition of international crimes. Through support of ecocide and corporate criminal liability in ICL, this paper highlights the need to evolve legal frameworks to meet modern global challenges. It conducts a bridge between environmental law and criminal responsibility, demonstrating that nuclear catastrophes find a singular intersection where environmental destruction leads to long-term suffering of humans.

Lastly, Chernobyl and Fukushima are not solely past tragedies but precursors for future warnings. The continued role of nuclear energy in the energy mix of most states ensures that hazards are never far away. Absent strong global regulation and effective accountability, potential future disasters could once more reveal the failure of national and international legal regimes. The solution, this paper contends, is to enhance international nuclear law, accept ecocide as an international crime amenable to prosecution, and apply ICL to corporate entities. It is only with these reforms that the international community can bring law into line with the moral obligation to save humanity and the planet from the devastating after-effects of nuclear failure.