Vol.2, Issue 1 of Journal for Peace and Nuclear Disarmament (J-PAND) has just been out. The issue features “Humanitarian Consequences of Nuclear Use,” “Is the NPT Still Relevant?,” and “The Twenty Years’ Crisis of Nuclear South Asia, 1998–2018.” The special section for working papers of Peace and Security of Northeast Asia (PSNA) has also been launched.

For the issue, see here.


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Joint ROK-Japan Workshop “From Peace on Korean Peninsula to North East Asia Nuclear Weapon Free Zone” was held from June 1st to 2nd in Seongnam, South Korea. It was co-organized by Sejong Institute and Research Center for Nuclear Weapons Abolition (RECNA), in cooperation with Panel on Peace and Security of Northeast Asia (PSNA).

Outline of the workshop is here.


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“A Guide to the World’s Nuclear Warheads Count June 2019” was released. Please click on the thumbnail images below and download the pdf guide and poster.

Guide to World’s Nuclear Warheads Count

Guide 2019

English Guide to the Worldʼs
Nuclear Warheads Count
June 2019

[for browsing on the Web]
[for making leaflets]

Poster 2019

How to make leaflets:
Print the English Guide (PDF) for making leaflets on both sides of A3 paper,
and fold it in two then in three.

How to make brochure

>> Previous versions can be downloaded from here.

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Posters of “The World’s Nuclear Warheads Count” June 2019 were released. Please click on the thumbnail images below and download the pdf posters.

The World’s Nuclear Warheads Count

Japanese English Korean
June 2019 NuclearWH2019_JPN NuclearWH2019_ENG NuclearWH2019_KOR

>> Previous versions can be downloaded from here.

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Methods for Refining Estimates of Cumulative DRPK Uranium Production

David von Hippel
Nautilus Institute Senior Associate

PSNA Working Paper Series (PSNA-WP-8)

May 27, 2019


This paper summarizes the history of what is known about uranium mining in the DPRK; describes the major uncertainties regarding DPRK uranium production; notes some of the key techniques, as used in preparing estimates of nuclear sector activity in other nations, that might be available to assist in narrowing the range of estimates of DPRK uranium and processed fissile material production; summarizes estimates of enriched uranium and plutonium production prepared by other authors; describes existing estimates of the amounts of fissile materials used in nuclear weapons tests and exported; provides a demonstration of the potential impact of remote sensing methods and testing in the DPRK in reducing uncertainties in cumulative historical uranium production, and thus in fissile materials inventories; and, offers conclusions, resulting from the potential impacts of uncertainty reduction approaches, as to which verification procedures should be key targets during negotiations with the DPRK.

>> for details

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