Thermal-hydraulic analyses of poisoned cold moderator vessel, 1; Study on Poison Plate Layout

Sato, Hiroshi; Aso, Tomokazu; Kogawa, Hiroyuki; Teshigawara, Makoto; Hino, Ryutaro

JAERI-Tech 2004-018, 23 Pages, 2004/03

JAERI-Tech-2004-018.pdf:2.42MB

The Japan Atomic Energy Research Institute is constructing a mega-watt class spallation neutron source in cooperation with the High Energy Accelerator Research Organization. A cold moderator using liquid hydrogen is one of the key components in the system, which directly affects the neutronic performance both in intensity and pulse time structure. Since a hydrogen temperature rise in the moderator vessel affects the neutronic performance, it is necessary to suppress the recirculation and stagnant regions which would cause hot spots. A cold moderator with a poison plate (poisoned decoupled moderator) has a high possibility to generate the stagnant region on and near the poison plate. Thermal-hydraulic analyses were carried out with proposed inner structure of the poisoned cold moderator. The stagnant and recirculation regions could be reduced by making a gap between the poison plate end and the vessel bottom surface, and the local temperature rise also could be kept under the required design value.

Thermal-hydraulic analyses of decoupled moderator vessels for spallation neutron source, 1; Comparison between analytical results and experimental results on velocity distribution

Sato, Hiroshi; Aso, Tomokazu; Kogawa, Hiroyuki; Hino, Ryutaro

Nihon Kikai Gakkai Kanto Shibu Ibaraki Koenkai (2003) Koen Rombunshu (No.030-3), p.47 - 48, 2003/00

no abstracts in English

Impinging jet experiments and analyses for a cold moderator vessel design

Aso, Tomokazu; Terada, Atsuhiko*; Kaminaga, Masanori; Hino, Ryutaro

Kashika Joho Gakkai-Shi, 21(Suppl.2), p.119 - 122, 2001/09

no abstracts in English

Study of flow characteristics in a cold moderator, 3; Flow Pattern measurement and analysis with flat model

Aso, Tomokazu; Kaminaga, Masanori; Terada, Atsuhiko*; Hino, Ryutaro

JAERI-Tech 2000-018, p.49 - 0, 2000/03

JAERI-Tech-2000-018.pdf:3.24MB

no abstracts in English

Study on flow characteristics in cold source moderator, 2; Flow pattern measurement and analysis, thermal-hydraulic analysis in cold source moderator vessel

Aso, Tomokazu; Kaminaga, Masanori; Terada, Atsuhiko; Hino, Ryutaro

JAERI-Tech 99-049, 45 Pages, 1999/06

JAERI-Tech-99-049.pdf:2.62MB

no abstracts in English

Study on flow characteristics in cold source moderator, 1; Flow pattern measurement and hydraulic analysis

Aso, Tomokazu; Kaminaga, Masanori; Terada, Atsuhiko; Hino, Ryutaro

JAERI-Tech 99-014, 113 Pages, 1999/03

JAERI-Tech-99-014.pdf:6.26MB

no abstracts in English

Spallation target development at JAERI; R&Ds on thermo-mechanical design

Hino, Ryutaro; Kaminaga, Masanori; Aso, Tomokazu; Kogawa, Hiroyuki; Ishikura, Shuichi*; *; Terada, Atsuhiko; Kinoshita, Hidetaka; Haga, Katsuhiro

Proc. of 14th Meeting of the Int. Collaboration on Advanced Neutron Sources (ICANS-14), 1, p.252 - 268, 1998/00

no abstracts in English