Studies of Ceramic Fuels with Use of Fission Gas Release Loop, (IV)

HANDA Muneo, YAMAGISHI Shigeru, FUKUDA Takeshi, SHIBA Koreyuki, TAKAHASHI Yoshihisa, TANIFUJI Takaaki, OMORI Shunzo, KONDO Akinori

doi:10.3327/jnst.11.387

Bibliographic Information

Other Title

Fission Gas Release from Uranium Carbide in the Presence of Trace Amounts of Water Vapor

Description

In-pile release of fission gas from sintered UC pellets in the presence of 8230 ppm of water vapor in the He sweep gas was measured over the temperature range of 160°1, 000°C.A very complex release behavior was observed and the mechanisms of release were deduced from the manner in which the release depended on the decay constant. It was established that the release of short-lived fission gases during irradiation was controlled mainly by pseudo-recoil, while chemical reaction between UC and water vapor, as well as knock-out, appeared to con-tribute much more significantly in the case of the longer-lived fission gases. The release of fission gas after reactor shutdown was shown to be governed by the UC-H₂O reaction. The ratio of the release due to this reaction in reference to the total release was found to be de-pendent not only on the concentration of the water vapor but also on the amount present of the accumulated reaction products. Also, a discussion is given on the inordinately high release of ^135mXe observed at 600°C.

Journal

Journal of Nuclear Science and Technology

Journal of Nuclear Science and Technology 11 (9), 387-394, 1974

Atomic Energy Society of Japan

Keywords

Details 詳細情報について

CRID: 1390001204098091392

NII Article ID: 130000823701

DOI: 10.3327/jnst.11.387

COI: 1:CAS:528:DyaE2MXitlWqsg%3D%3D

ISSN: 18811248; 00223131

Text Lang: en

Data Source

JaLC
Crossref
CiNii Articles

Abstract License Flag: Disallowed

Export

Report a problem