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Yanagisawa, Kazuaki
International Journal of Nuclear Energy Science and Technology, 6(1), p.55 - 63, 2011/00
The Japan Materials Testing Reactor (JMTR) loaded the 4.8g/cc silicide fuel for the core conversion from the high to the low enrichment (
20wt%). In the experiment, the reactivity insertion of 0.35% per s, caused by the by the abnormal withdrawal of the control rod at the start up of the JMTR was assumed. The value was about twice the EUREKA2 computer code used for the licensing. As a result, the test specimen (4.8g/cc silicide fuel) had the peak cladding surface temperature of 137 
C. The test specimen did not fail by quench mechanism because the time to quench tq was 0.11s and the temperature drop was 28 C. Usually the quench failure occurs at the rapid tq ( 0.13s) and the high temperature drop (
94 C). The safety margin of the JMTR against the accident induced by the abnormal withdrawal of control rod was assured.
Yanagisawa, Kazuaki
International Journal of Nuclear Energy Science and Technology, 4(2), p.97 - 110, 2008/00
The pulse irradiation tests were conducted on silicide mini-plate fuels, prepared for a peaceful application of nuclear energy. The major findings are: (1) Neither failure nor degradation of dimensional stability of the fuel occurred in the temperature below 400 C. Beyond that level a dimensional stability was gradually degraded with an increase of temperature. (2)The fuels were intact at energy depositions 82 cal/g but were damaged at energy depositions of 94 cal/g, where the failure mode is wither through-plate cracking or fuel melt. A failure threshold must be existed between the two values.
Yanagisawa, Kazuaki
International Journal of Nuclear Energy Science and Technology, 4(2), p.97 - 110, 2008/00
The pulse irradiation tests were conducted on silicide mini-plate fuels, prepared for a peaceful application of nuclear energy. The major findings are: (1) Neither failure nor degradation of dimensional stability of the fuel occurred in the temperature below 400 C. Beyond that level a dimensional stability was gradually degraded with an increase of temperature. (2) The fuels were intact at energy depositions below 82 cal/g but were damaged at energy depositions of above 94 cal/g, where the failure mode is wither through-plate cracking or fuel melt. A failure threshold must be existed between the two values.
