TRITIUM PRODUCTION-RATE MEASUREMENT TECHNIQUES DEVELOPED AT FNS JAERI/

The tritium production-rate (TPR) is a very important neutronic parame ter in the D-T fusion blanket research. The following five techniques for the measurement of TPR have been developed at FNS/JAERI: (1) Subtr action method using a pair of Li-glass scintillators, (2) Indirect met hod using a small sphere NE213 scintillator, (3) Liquid scintillation method with Li2O pellet, (4) Liquid scintillation method with Li2O pla te/block (zonal method), and (5) LiF TLD self-irradiation method. This paper describes these methods, comparison of their features, and thei r typical results for the blanket benchmark experiments at FNS.