Opinions of experts on protection of nuclear facilities from armed attacks by state actors

Tazaki, Makiko

Dai-45-Kai Nihon Kaku Busshitsu Kanri Gakkai Nenji Taikai Kaigi Rombunshu (Internet), 4 Pages, 2024/11

no abstracts in English

The Scope of nuclear facilities that may be protected by international treaties in the event of international armed conflict

Imamura, Yuri

Dai-45-Kai Nihon Kaku Busshitsu Kanri Gakkai Nenji Taikai Kaigi Rombunshu (Internet), 4 Pages, 2024/11

no abstracts in English

Evaluation of uncertainties caused by nuclear data with respect to the Pu amount in spent MOX fuel by burn-up sensitivity analysis

Oizumi, Akito

Dai-45-Kai Nihon Kaku Busshitsu Kanri Gakkai Nenji Taikai Kaigi Rombunshu (Internet), 4 Pages, 2024/11

When a domestic reprocessing plant starts operation, differences in the estimated Pu amount between the electric utility that manages the discharge of spent MOX fuel from LWRs and the reprocessing plant that received it may affect safeguards reliability. In this study, the uncertainties in the estimated Pu amount caused by nuclear data covariance were quantitatively determined by burn-up sensitivity analysis. In addition, the recommended verification frequency of the Pu amount was discussed by estimating the Pu amount that may be undeclared, using the quantified uncertainty caused by nuclear data covariance. As a result, the quantified uncertainty of the Pu amount caused by the nuclear data covariance was estimated to be 1.58%, and the verification frequency based on this was evaluated once every two weeks or more. More discussion including measurement error is necessary to estimate a more effective verification frequency.

Development of a nondestructive assay technique using a laser-driven neutron source

Koizumi, Mitsuo; Ito, Fumiaki*; Lee, J.; Hironaka, Kota; Takahashi, Tone; Suzuki, Satoshi*; Arikawa, Yasunobu*; Abe, Yuki*; Wei, T.*; Yogo, Akifumi*; et al.

Dai-45-Kai Nihon Kaku Busshitsu Kanri Gakkai Nenji Taikai Kaigi Rombunshu (Internet), 4 Pages, 2024/11