Master plan for the development of ZnS scintillation neutron detectors for NDA

Kureta, Masatoshi   ; Soyama, Kazuhiko  ; Seya, Michio; Ozu, Akira  ; Haruyama, Mitsuo; Nakamura, Tatsuya  ; To, Kentaro  ; Sakasai, Kaoru  

Alternative techniques to neutron detection by He-3 for safeguards and nuclear security systems are necessary to be developed since He-3 gas shortage is serious. With support of Japanese government (MEXT), we have started the project of ZnS ceramic scintillation neutron detectors for non-destructive assay (NDA) of Pu in Fresh MOX fuel and other types of nuclear material for a use of safeguards verification. Here we present master plan of the project and feasibility study on neutron absorption probability in our scintillator by using Monte Carlo code.