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

TRACYパルス放射線に対する臨界警報装置の試験

辻村 憲雄   ; 吉田 忠義 ; 眞田 幸尚   

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.