Characteristic examination and IAEA acceptance test for waste container assay system (WCAS) #2

not registered; not registered; not registered; Aoki, Isao; not registered; not registered 

The Plutonium Fuel Center at Tokai Works has installed the Waste Container Assay System #2 made by Canberra Industries in US to assay the quantity of plutonium at 2 PWSF. The Center had performed characteristic examination for WCAS#2 since June of 2000, and IAEA had performed the acceptance test for this equipment with MEXT JSGO inspectors in March of 2001. Therefore, WCAS|#2 was available to use as an accountancy control device and a safeguards inspection device since June of 2001. This characteristic examination was performed based on the experience of a similar examination of WCAS#1 using the PuO powder of standard samples which were arranged to enter a state near real waste container. As a result, Assay error became about 9%(16) or less and the lower limit of detection is about 2mg(Pu-eff). The safeguards inspection parameter was able to be set by this acceptance test.