Uncertainty quantification for severe-accident reactor modelling; Results and conclusions of the MUSA reactor applications work package

Brumm, S.*; Gabrielli, F.*; Sanchez Espinoza, V.*; Stakhanova, A.*; Groudev, P.*; Petrova, P.*; Vryashkova, P.*; Ou, P.*; Zhang, W.*; Malkhasyan, A.*; et al.

Annals of Nuclear Energy, 211, p.110962_1 - 110962_16, 2025/02

https://doi.org/10.1016/j.anucene.2024.110962

The Design and implementation of the PGA measurement system in an integrated Active Neutron non-destructive analysis system, "Active-N"

Furutaka, Kazuyoshi; Ozu, Akira; Toh, Yosuke

Proceedings of INMM & ESARDA Joint Virtual Annual Meeting (Internet), 9 Pages, 2021/08

Development of active non-destructive analysis technologies for nuclear nonproliferation and security of JAEA

Koizumi, Mitsuo

Proceedings of 41st ESARDA Annual Meeting (Internet), p.260 - 267, 2019/05

Preparation, certification and validation of a stable solid spike of uranium and plutonium coated with a cellulose derivative for the measurement of uranium and plutonium content in dissolved nuclear fuel by isotope dilution mass spectrometry

Surugaya, Naoki; Hiyama, Toshiaki; Verbruggen, A.*; Wellum, R.*

Analytical Sciences, 24(2), p.247 - 252, 2008/02

https://doi.org/10.2116/analsci.24.247

A stable solid spike for the measurement of uranium and plutonium content in nitric acid solutions of spent nuclear fuel by isotope dilution mass spectrometry has been prepared at the European Commission Institute for Reference Materials and Measurements in Belgium. The spike contains about 50 mg of uranium with a 19.838% U enrichment and 2 mg of plutonium with a 97.766% Pu abundance in each individual ampoule. The dried materials were covered with a thin film of cellulose acetate butyrate as a protective organic stabilizer to resist shocks encountered during transportation and to eliminate flaking-off during long-term storage. It was found that the cellulose acetate butyrate has good characteristics, maintaining a thin film for a long time, but readily dissolving on heating with nitric acid solution. The solid spike containing cellulose acetate butyrate was certified as reference material IRMM-1027f with certified quantities: U and Pu amounts and uranium and plutonium amount ratios, and was validated by analyzing spent fuel dissolver solutions of the Tokai reprocessing plant in Japan.

Development of active neutron NDA system for nuclear non-proliferation and nuclear security, 7-4; Measurements with the Neutron Resonance Transmission Analysis (NRTA) part

Tsuchiya, Harufumi; Kitatani, Fumito; Toh, Yosuke

no journal, , 

no abstracts in English

Joint validation of the in-situ uranium age dating method

Okubo, Ayako; Mayer, K.*

no journal, , 

Under the collaboration between EC-JRC and JAEA, the in-situ age dating method was subject to joint validation, and six different uranium materialswere used for this purpose. The age dating result by in-situ isotope method was consistent with known production dates of the respective samples. The uncertainty evaluation according to GUM for the in-situ isotope method indicates that the measured Th/Th ratio provides the highest contribution. The accuracy of in-situ isotope method can be improved by higher precision in Th/Th measurement.