IMPROVEMENT OF TRITIUM ACCOUNTANCY TECHNOLOGY FOR THE ITER FUEL CYCLE SAFETY ENHANCEMENT

摘要

In order to improve the safe handling and control of tritium for ITER fuel cycle, effective “in-situ” tritiumrnaccounting methods have been developed at Tritium Process Laboratory in Japan Atomic Energy ResearchrnInstitute under one of the ITER-EDA R&D Tasks. A remote and multi-location analysis of process gases by anrnapplication of laser Raman spectroscopy developed and tested could provide a measurement of hydrogen isotoperngases with a detection limit of 0.3 kPa for 120 seconds analytical periods. An “in-situ” tritium inventoryrnmeasurement by application of a “self assaying” storage bed with 25 g tritium capacity could provide arnmeasurement with a required detection limit less than 1 % and a design proof of a bed with 100 g tritium capacity.