Development of fuel failure detection system for a high temperature gas cooled reactor (II)

Journal Article · Wed Jun 01 04:00:00 EDT 1988 · IEEE Trans. Nucl. Sci.; (United States)

DOI:https://doi.org/10.1109/23.3699· OSTI ID:6632306

Terada, H; Wakayama, N; Obata, M; Ogawa, T; Kobayashi, F; Fukuda, K; Oyama, N; Sakuraba, K; Yokouchi, I; Yoshida, H

A fuel failure detection (FFD) method based on selective detection of short-life and gaseous fission products has been developed for a high temperature gas cooled reactor. An improved type precipitator was used as a detector for the fission products and the performance of the FFD system was tested using an irradiation rig at the Japan Material Testing Reactor (JMTR). In the rig, three kinds of samples of coated particle fuels were irradiated and each sample of the primary helium gas was fed to the FFD system. Failure rates of the three fuel samples called 1) intact, 2) normal, and 3) slightly failed, were estimated at about 10/sup -6/, 10/sup -5/, and 10/sup -4/, respectively. The FFD system showed a significantly increased response in counting rate to the sample gas at a failure rate 10/sup -4/. On the other hand, the FFD system did not respond to the sample gas with the smaller failure rate of 10/sup -5/ even when the background level of long-life fission products in the primary coolant gas increased with fuel temperature and the reactor power.

• Research Organization: Japan Atomic Energy Research Institute (JAERI), Tokai-mura, Naka-gun, Ibaraki-ken, 319-11 (JP)
• OSTI ID: 6632306
• Journal Information: IEEE Trans. Nucl. Sci.; (United States), Journal Name: IEEE Trans. Nucl. Sci.; (United States) Vol. 35:3; ISSN IETNA
• Country of Publication: United States
• Language: English

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