Publications and Analyses

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Tianran Xu
Jaewoo Shin
Elin Bergner
July 12, 2023

Nuclear Risk Assessment Report - June 2023

In an attempt to more comprehensively assess nuclear risks on and around the Korean Peninsula, this monthly Report examines the DPRK’s and the ROK’s nuclear and military spheres, as well as activities and policy decisions across main domestic and foreign policy spheres that could impact nuclear risk...
Tianran Xu
June 29, 2023

Size Estimates of DPRK's Nuclear Devices

The DPRK nuclear warheads showcased before 2023 have a maximum diameter of around 600 mm and were likely intended to be delivered by ballistic missiles. The Hwasan-31 nuclear warhead, newly revealed in late March 2023, has a reduced diameter of around 460 mm, suggesting advances in miniaturization. ...
Tianran Xu
April 14, 2023

The DPRK's First Solid-Propellant ICBM Launch

Strategic Delivery Vehicle Development Series
On 13 April 2023, the Democratic People's Republic of Korea (DPRK) conducted its first flight test of a solid-propellant intercontinental ballistic missile (ICBM), the Hwasong-18.
Tianran Xu
February 23, 2023

Brief on the DPRK's 8 February 2023 Parade

Strategic Delivery Vehicle Developments Series
In comparison to previous military parades, the parade on 8 February 2023 put a strong focus on the intercontinental-range nuclear strike force: the parade only displayed a few conventional and short-range nuclear-capable weapon systems, but showcased an unprecedented number of 12 Hwasong-17 ICBMs.
Tianran Xu
February 13, 2023

Update on the DPRK's 600 mm Multiple Launch Rocket System

Strategic Delivery Vehicle Developments Series
The Democratic People's Republic of Korea acknowledged in 2020 that there were issues related to the production of the 600 mm calibre multiple launch rocket system (MLRS). The delivery of thirty such MLRS in December 2022 suggests that these problems have been resolved.
Marcy Fowler
Sarah Laderman
Valeriia Hesse
January 19, 2023

ONN Expert Roundup: Northeast Asia Consequences of Nuclear Escalation in Ukraine

The use of a nuclear weapon anywhere in the world would have far-reaching consequences, with effects extending well beyond the immediate area of impact. ONN has previously noted that any further escalation in Ukraine could potentially expand into an increase in military activity or force re-alignmen...
Tianran Xu
December 16, 2022

DPRK Unveils Its Solid-Propellant ICBM Motor

The DPRK claimed to have tested the country’s first large and high-thrust solid-propellant motor on 15 December 2022 at the Sohae Satellite Launching Ground. Judging from the stated thrust of 140 tons of force (tf) and purpose, the motor will likely serve as the first stage of a solid-propellant bal...
Veronika Bedenko
Valeriia Hesse
Jaewoo Shin
December 12, 2022

Learning from the JCPOA Experience: Restarting Dialogue Aimed at Crisis Resolution

This paper explores lessons to be learned from the process and framework of the negotiations under the Joint Comprehensive Plan of Action (JCPOA) with regard to conflict mediation and trust-building, especially during the early stages of negotiation. The findings are based on an analysis of numerous...
Tianran Xu
Katsuhisa Furukawa
Elin Bergner
Kristiana Nitisa
November 11, 2022

Escalating Tensions on the Korean Peninsula

Late September to early November 2022
Since late September, the Korean Peninsula has witnessed a new round of escalation of tensions. Coinciding with multiple joint and individual military exercises of the USA, ROK and Japan, the DPRK launched at least 30 ballistic missiles from 25 September to 14 November 2022 and fired artillery shell...
Marcy Fowler
Elin Bergner
Kristiana Nitisa
November 10, 2022

Combating Nuclear Misinformation and Disinformation

Tools, Approaches and the Role of NGOs and International Organizations
The paper was submitted for the IAEA's Symposium on International Safeguards: Reflecting on the Past and Anticipating the Future.
Elin Bergner
August 18, 2022

DPRK's Declared COVID-19 Victory and Implications for a Next Nuclear Test

On 10 August 2022, Kim Jong Un declared "victory" over the COVID-19 epidemic at the "National meeting of reviewing the emergency anti-epidemic work", while Kim Yo Jong reiterated previous North Korean claims that the virus had entered the country from South Korea and threatened to wipe out the South...