Characterization of hybrid self-powered neutron detector under neutron irradiation

To evaluate the irradiation behaviour of a blanket mock-up on in-pile funct ional test, it is necessary to measure the neutron flux change in the in-pi le mock-up by a neutron detector, such as the self-powered neutron detector (SPND). With its small-sized emitter, which has high sensitivity and fast response time, SPND is an indispensable tool in order to measure the local neutron flux change. In the case of an in-pile functional test, it is neces sary that response time is less than Is and ratio of SPND output current is more than 0.3 of output current of SPND with Rh emitter. Therefore, a hybr id SPND with high sensitivity and fast response time was developed. This hy brid SPND used a hybrid emitter, i.e. Co cladded Pt-13%Rh. (C) 2000 Elsevie r Science S.A. All rights reserved.