Enhancement of the methodology of repository design and post-closure performance assessment for preliminary investigation stage, 2; Progress report on NUMO-JAEA collaborative research in FY2012 (Joint research)

Shibata, Masahiro; Sawada, Atsushi; Tachi, Yukio; Hayano, Akira; Makino, Hitoshi; Wakasugi, Keiichiro; Mitsui, Seiichiro; Oda, Chie; Kitamura, Akira; Osawa, Hideaki; et al.

JAEA-Research 2013-037, 455 Pages, 2013/12

JAEA-Research-2013-037.pdf:42.0MB

Following FY2011, JAEA and NUMO have conducted a collaborative research work which is designed to enhance the methodology of repository design and performance assessment in preliminary investigation stage. With regard to (1) study on rock suitability in terms of hydrology, the tree diagram of methodology of groundwater travel time has been extended for crystalline rock, in addition, tree diagram for sedimentary rock newly has been organized. With regard to (2) study on scenario development, the existing approach has been improved in terms of a practical task, and applied and tested for near field focusing on the buffer. In addition, the uncertainty of some important processes and its impact on safety functions are discussed though analysis. With regard to (3) study on setting radionuclide migration parameters, the approaches for parameter setting have been developed for sorption for rocks and solubility, and applied and tested through parameter setting exercises for key radionuclides.

Parallelization of Detailed Thermal-Hydraulic Analysis Program SPIRAL

Deguchi, Akira*; Ohshima, Hiroyuki

JNC TN9400 2003-088, 79 Pages, 2003/03

JNC-TN9400-2003-088.pdf:2.5MB

A detailed thermal-hydraulic analysis computer program SPIRAL is under development for the evaluation of local flow and temperature fields in wire-wrapped fuel pin bundles deformed by the influence of high burn-up, which are hard to reveal by experiment due to measurement difficulty. This report describes the parallelization of SPIRAL for improving applicability to larger numerical simulations. As the parallelization efficiency, approximately twelve times processing speed could be obtained by using 16 processor elements in larger scale simulations.

Reactivity effect of borated stainless steel plate in single and coupled cores composed of low-enriched UO rods

Miyoshi, Yoshinori; Nakajima, Ken; ; Kobayashi, Iwao; Aoki, Shigeaki*; *; *; *

Journal of Nuclear Science and Technology, 31(4), p.335 - 348, 1994/04

https://doi.org/10.3327/jnst.31.335

no abstracts in English

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; ; ; ; ; Deguchi, Morimoto

Dai-18-Kai Kaku Busshitsu Kanri Gakkai Nihon Shibu Nenji Taikai Rombunshu, , 

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