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Report No.

Testing of criticality accident alarm system detectors to pulsed radiation at TRACY

Tsujimura, Norio   ; Yoshida, Tadayoshi ; Sanada, Yukihisa   

The Japan Atomic Energy Agency used criticality accident alarm systems (CAAS) to monitor the occurrence of any accidental criticality at the Tokai Reprocessing Plant (TRP). A total of six plastic scintillator-based detector units, newly purchased or developed for the TRP, were tested by exposing them to pulsed radiation generated at TRACY, which is a pulse-type reactor that uses uranyl nitrate solution as fuel. All detector units tested responded properly to pulsed radiation that simulated an actual accidental criticality.



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