Research Center for Nuclear Weapons Abolition

It is published simultaneously by RECNA-Nagasaki University, Asia Pacific Leadership Network for Nuclear Non-proliferation and Disarmament (APLN), and Nautilus Institute.

POTENTIAL USE OF LOW-YIELD NUCLEAR WEAPONS
IN A KOREAN CONTEXT
 
Eva Lisowski
 
Prepared for the
Project on Reducing the Risk of Nuclear Weapons Use
in Northeast Asia (NU-NEA)
 
Co-sponsored by
The Research Center for Nuclear Weapons Abolition, Nagasaki University (RECNA),
The Nautilus Institute for Security and Sustainability, and
The Asia-Pacific Leadership Network for Nuclear Non-Proliferation and Disarmament (APLN)
 
with cooperation of
Panel on Peace and Security of Northeast Asia
 
Additional funding by the MacArthur Foundation
 
February 22, 2022

This report explores the potential uses of low-yield nuclear weapons in the context of a possible conflict on the Korean Peninsula. It starts with a definition of low-yield weapons—typically, weapons with yields of ten kilotons or less that are designed to be nonstrategic or “tactical” weapons used with shorter-range delivery systems, prepared for the purpose of attacking troops or battlefield infrastructure. The paper then reviews the history of United States legislation regarding low-yield weapons and describes three generic scenarios in which foes possessing low-yield weapons might choose, or not choose, to use them during a military conflict. Examples of radioactive fallout maps are provided based on HYSPLIT modeling for explosions of 0, 3 and 10 kilotons at a location in the Korean demilitarized zone at different times of the year. The arsenals of low-yield weapons in the states possessing nuclear weapons in Northeast Asia, as well as the United States, are compared, and seven possible “use cases” for low-yield nuclear weapons involving the Korean Peninsula are put forward.

Keywords:
Korean Peninsula, Nuclear Issue, DPRK, Denuclearization, Balance of Power
 

Authors’ Profile:

Eva Lisowski is a member of the Nuclear Weapons Education Project at the Massachusetts Institute of Technology, from where she graduated in 2020 with a BS in Nuclear Science & Engineering. Her prior publications include evaluations of the attractiveness of fissile materials in advanced nuclear reactors to weapons of mass destruction construction, and analysis of fissile material production in India following the US-India Civil Nuclear Agreement. Her current work focuses on simulating the consequences of nuclear weapon detonations and missile strikes targeting civilian nuclear reactors. As a young member of the American Nuclear Society and 2019 Summer Fellow at the United States Nuclear Industry Council, Ms. Lisowski has participated in nuclear energy advocacy at the Massachusetts State House and on Capitol Hill in Washington D.C. Ms. Lisowski has studied and conducted research at the Tokyo Institute of Technology and hopes to contribute to nuclear security and non-proliferation by strengthening US-Japan research collaboration. She returned to Tokyo Tech in September 2021 to pursue an MS in Nuclear Science & Engineering.

Full text (PDF) is here.
The page for this project is here.
 

It is published simultaneously by RECNA-Nagasaki University, Asia Pacific Leadership Network for Nuclear Non-proliferation and Disarmament (APLN), and Nautilus Institute.

Avoiding Nuclear War In The Taiwan Strait
 
Sheryn Lee
 
Prepared for the
Project on Reducing the Risk of Nuclear Weapons Use
in Northeast Asia (NU-NEA)
 
Co-sponsored by
The Research Center for Nuclear Weapons Abolition, Nagasaki University (RECNA),
The Nautilus Institute for Security and Sustainability, and
The Asia-Pacific Leadership Network for Nuclear Non-Proliferation and Disarmament (APLN)
 
with cooperation of
Panel on Peace and Security of Northeast Asia
 
Additional funding by the MacArthur Foundation
 
February 18, 2022

China’s improving nuclear arsenal, the United States’ deteriorating “strategic ambiguity” policy, and Taiwan’s increasing identification as independent polity raises the prospect of conflict over Taiwan. But the use of nuclear weapons in the Taiwan Straits would happen only under extreme circumstances. This paper argues Beijing is increasing its use of gray-zone tactics with conventional and non-military means below the level of nuclear provocation to tip the cross-straits military balance in its favor. This report first examines China’s aim to achieve unification with Taiwan via its use of threat and use of force in both the nuclear and conventional domains through a close examination of the three historical cross-strait crises. Second, it outlines the geostrategic and geopolitical rationale for continued American support for Taiwan in an era of United States-China competition. Lastly, it explores the role of Taiwan’s consolidating democracy and how Taipei responds to Beijing’s coercion. The report concludes with consideration of how the Taiwan Straits case may affect the possibility of nuclear weapons use in Northeast Asia, including in Japan and on the Korean peninsula.

Keywords:
Strategic ambiguity, Cross-Straits relations, Nuclear domino effect, US-China relations, Taiwanese Independence
 

Authors’ Profile:
Dr Sheryn Lee is a senior lecturer in the Department of Leadership and Command and Control at the Swedish Defence University, Stockholm. Dr Lee was previously an analyst for the Office of National Intelligence, Australia. Prior to that she was a lecturer in the Department of Security Studies and Criminology, Macquarie University. She holds a PhD from the Strategic and Defence Studies Centre, ANU, where she was a TB Millar Scholar, and an AM in Political Science from the University of Pennsylvania where she was a Benjamin Franklin Fellow and Mumford Fellow. She has also been a non-resident WSD-Handa Fellow at the CSIS Pacific Forum and a Robert O’Neill Scholar at the IISS-Asia, Singapore.

Full text (PDF) is here.
The page for this project is here.
 

It is published simultaneously by RECNA-Nagasaki University, Asia Pacific Leadership Network for Nuclear Non-proliferation and Disarmament (APLN), and Nautilus Institute.

PROSPECTS FOR DPRK’S NUCLEAR USE SCENARIOS AND DETERRENCE MEASURES OF THE US AND ROK ALLIANCE
 
Lee Sangkyu
 
Prepared for the
Project on Reducing the Risk of Nuclear Weapons Use
in Northeast Asia (NU-NEA)
 
Co-sponsored by
The Research Center for Nuclear Weapons Abolition, Nagasaki University (RECNA),
The Nautilus Institute for Security and Sustainability, and
The Asia-Pacific Leadership Network for Nuclear Non-Proliferation and Disarmament (APLN)
 
with cooperation of
Panel on Peace and Security of Northeast Asia
 
Additional funding by the MacArthur Foundation
 
February 18, 2022

[This article reflects the personal opinions of the author, not the official opinions of the government of the Republic of Korea.]

The purpose of this paper is to develop cases for the DPRK’s use of nuclear weapons. As background, firstly, the deterrence and countermeasure strategies of the United States-ROK alliance in the face of the increasingly sophisticated DPRK’s nuclear threat is examined. Then, the DPRK’s nuclear capabilities and nuclear strategy are investigated, and nuclear use cases are presented in detail based on those strategies. The relative priorities and feasibility of the different DPRK nuclear use cases were analyzed using parameters evaluating their military effect, the potential for US nuclear retaliation, and the level of civilian casualties. Among the expected cases, an attack on the ROK Mobile Corps would seem to be the most probable scenario, since the benefits that the DPRK would gain from such an attack would be high. Within that case, there is a danger of nuclear provocation due to the asymmetry between the DPRK’s nuclear possession and ROK’s possession of only conventional forces. The importance of the US extended deterrence policy to deter the DPRK’s nuclear threat is therefore emphasized, and measures to strengthen the credibility of US extended deterrence are also suggested.

Keywords:
DPRK, Nuclear Capabilities, Nuclear Strategy, Nuclear Use Cases, US-ROK Alliance
 

Authors’ Profile:

Professor Lee Sangkyu is a Republic of Korea (ROK) army officer and assistant professor at the Korea Military Academy (KMA). His main research focus is the Democratic People’s Republic of Korea’s (DPRK) nuclear threats, including its nuclear capabilities, strategies, and command and control system. Professor Lee holds PhD and MS degrees in Nuclear Engineering from the University of Utah in the United States. He has been an assistant professor in the Department of Physics at KMA since 2019, and from 2017 to 2018 served as the Nuclear Policy Planning Officer at the North Korea Policy Bureau, Ministry of National Defense, Republic of Korea.

Full text (PDF) is here.
The page for this project is here.
 

It is published simultaneously by RECNA-Nagasaki University, Asia Pacific Leadership Network for Nuclear Non-proliferation and Disarmament (APLN), and Nautilus Institute.

COUNTERFORCE DILEMMAS AND
THE RISK OF NUCLEAR WAR IN EAST ASIA
 
Ian Bowers
 
Prepared for the
Project on Reducing the Risk of Nuclear Weapons Use
in Northeast Asia (NU-NEA)
 
Co-sponsored by
The Research Center for Nuclear Weapons Abolition, Nagasaki University (RECNA),
The Nautilus Institute for Security and Sustainability, and
The Asia-Pacific Leadership Network for Nuclear Non-Proliferation and Disarmament (APLN)
 
with cooperation of
Panel on Peace and Security of Northeast Asia
 
Additional funding by the MacArthur Foundation
 
February 9, 2022
 

The discovery of new Chinese nuclear missile silos, a seemingly escalating nuclear-conventional arms competition between the Democratic People’s Republic of Korea (DPRK) and the Republic of Korea (ROK), and the announcement that Australia, in concert with the US (United States) and UK (United Kingdom), is pursuing nuclear-powered attack submarines are events that collectively indicate a worsening security environment in East Asia. Using geostrategic, operational, and technological factors as the basis for analysis, this paper contextualizes these and other developments and assesses the potential for nuclear war in East Asia in general and on the Korean Peninsula in particular.
The most dangerous threat to strategic stability is a counterforce dilemma where the conventional weapons of the US, China, and regional East Asian actors may create strategic instability by their intentional or inadvertent entanglement or use to target the nuclear forces of another state, resulting in pursuit of more secure second-strike capability by the countries of the region, and forming the heart of conventional warfighting and deterrence strategies. The many different conflictual or competitive relationships across the region make arms control initiatives unlikely to succeed, but the maritime nature of the geostrategic environment and the lack of existential threat that the United States and China pose to each other may offer fewer natural pathways to the use of nuclear weapons for either China or the United States than there were for the adversaries in the Cold War.

Keywords:
United States, China, Conventional Weapons, Arms Control, Nuclear War
 

Authors’ Profile:

Ian Bowers is an Associate Professor at the Centre for Joint Operations at the Royal Danish Defense College. His research focuses on deterrence, the future operational environment, sea power, and East Asian security. His research has been published in several international journals including International Security, the Journal of Strategic Studies, the Naval War College Review, and the Korean Journal of Defense Analysis. His most recent co-authored work, titled “Conventional Counterforce Dilemmas: South Korea’s Deterrence Strategy and Stability on the Korean Peninsula,” was published in International Security. Bowers has also published a monograph on the modernization of the Republic of Korea Navy, and edited volumes on sea power and military change. Bowers holds a PhD in War Studies from King’s College London.

Full text (PDF) is here.
The page for this project is here.
 

It is published simultaneously by RECNA-Nagasaki University, Asia Pacific Leadership Network for Nuclear Non-proliferation and Disarmament (APLN), and Nautilus Institute.

Korean peninsula Nuclear issue：Challenges and Prospects
 
Anastasia Barannikova
 
Prepared for the
Project on Reducing the Risk of Nuclear Weapons Use
in Northeast Asia (NU-NEA)
 
Co-sponsored by
The Research Center for Nuclear Weapons Abolition, Nagasaki University (RECNA),
The Nautilus Institute for Security and Sustainability, and
The Asia-Pacific Leadership Network for Nuclear Non-Proliferation and Disarmament (APLN)
 
with cooperation of
Panel on Peace and Security of Northeast Asia
 
Additional funding by the MacArthur Foundation
 
February 3, 2022
 

For the last three decades the Korean Peninsula nuclear issue (KPNI) has been considered as one of the most serious threats to security and stability in NEA (Northeast Asia). To date, none of the efforts by the international community—including Six-party talks, pressure and diplomatic efforts, and more recently, activity started by the Democratic People’s Republic of Korea (DPRK) in 2018-2019—have yielded tangible results in addressing the issue. This puts into question the viability of the existing approaches to the DPRK and the feasibility of achieving a KPNI solution.

Keywords:
Korean Peninsula, Nuclear Issue, DPRK, Denuclearization, Balance of Power
 

Authors’ Profile:

Anastasia Barannikova is a research fellow at ADM Nevelskoy Maritime State University (Vladivostok, Russia) and non-resident senior fellow of Mongolian Institute of Northeast Asian Security and Strategy (Mongolia).

She was a visiting fellow at Center for Strategic & International Studies (CSIS) in 2019, James Martin Center for Non-Proliferation Studies (CNS), Middlebury Institute of International Studies in 2020 and Institute of Far Eastern Studies, Kyungnam University in 2021. She holds PhD in History from ADM Nevelskoy Maritime State University.

Barannikova is the author of more than 100 publications in scientific journals, newspapers, and blogs, including articles in Russian, English, Chinese, Korean, Mongolian, and Japanese languages. Her research interests include (but not limited by) regional (Northeast Asia) security and nuclear non-proliferation: Korean Peninsula, reunification, DPRK foreign and domestic policies, DPRK nuclear and missile program, nuclear posture.

Full text (PDF) is here.
The page for this project is here.