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Aoyama, Michio*; Yamazawa, Hiromi*; Nagai, Haruyasu
Nihon Genshiryoku Gakkai-Shi ATOMO
, 60(1), p.46 - 50, 2018/01
no abstracts in English
Miyahara, Naoya; Miwa, Shuhei; Nakajima, Kunihisa; Osaka, Masahiko
Proceedings of 2017 Water Reactor Fuel Performance Meeting (WRFPM 2017) (USB Flash Drive), 9 Pages, 2017/09
This paper presents the development of a reproductive experimental setup for FP release and transport and an analysis tool considering chemical reaction kinetics for the construction of the FP chemistry database. The performance test of the reproductive experimental setup TeRRa using CsI compounds show that TeRRa can reproduce well a FP chemistry-related behavior such as aerosol formation, growth and deposition behavior. An analytical tool has been developed based on the commercial ANSYS-FLUENT code. Some additional models was added to evaluate detailed FP chemistry during release and transport in this study. A test analysis simulating the CsI heating test in steam atmosphere was carried out to demonstrate the performance of the improved code. The result shows the appropriateness of the additional models.
; *; T.H.Pigford*
JAERI-M 9183, 11 Pages, 1980/11
no abstracts in English
Osaka, Masahiko; Miwa, Shuhei; Yamashita, Shinichiro; Takai, Toshihide; Nakajima, Kunihisa; Furukawa, Tomohiro; Nagase, Fumihisa
no journal, ,
Fission product (FP) chemistry under the LWR severe accident (SA) conditions should be deeply understood for more accurate evaluation of FP release and transport behavior, which can lead to reduction of uncertainty in the evaluation of source term. This paper describes the contents of research program that is focused on the FP chemistry. Results of the FP chemical form just after release from fuel by a chemical equilibrium calculation considering dependences of release kinetics for related elements showed that dominant vapor species have changed according to the atmospheres and Cs-B-O species became dominant in the presence of B
C. As for the Cs-chemisorption behavior, it was found by a literature review that resultant compounds formed by the Cs-chemisorption onto the SS could be divided into two categories, Cs-Cr-O and Cs-Si-O compounds.
