Source of radioiodine in primary cooling water of Japan Materials Testing Reactor.

概要

論文の詳細を見る
During normal operation of Japan Materials Testing Reactor (JMTR), radioiodines are always detected in the primary cooling water in low levels. In order to identify the main source of the radioiodines, the data obtained during steady-state operation were investigated and uranium contents in main structural materials of JMTR core were determined by neutron activation analysis. It was found that the concentration of the radioiodines had varied in accordance with the exchange of the beryllium reflector frame in the core. The analytical results of the main structural materials showed that the uranium content in beryllium materials was 10-42ppm. The radioiodine concentration in the water calculated from the uranium content agreed with the measured concentration with a limited accuracy. These results suggest that the radioiodines in the reactor water were released mainly from uranium contained in beryllium materials as an impurity.
一般社団法人日本原子力学会の論文