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Report No.

Performance confirmation of MONJU failed fuel detection and location system, 1; Noble gas concentration test of active carbon

Suzuki, Satoshi; Morohashi, Yuko 

The Tagging gas method which identifies failed fuel by tag gas is used for the failed fuel detection and location system (FFDL) of prototype fast-breeder reactor Monju. This encloses characteristic tag gas (Kr, Xe) with the fuel pin for every fuel assembly beforehand, collects and analyzes the tag gas emitted to the primary argon gas system at the time of fuel failure, and identifies failed fuel. It is supposed on the design that it can identify at a 200 or more-time rare gas concentration rate (recovery rate), and it is checked by sample gas with a rare gas concentration of 1 ppm in the past examination. This time, while checking the rare gas concentration rate by the low concentration gas of the level assumed at the time of fuel failure, it checked also about the dependence of rare gas concentration.



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