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; *; *; Aoki, Isao; ;
JNC TN8410 2002-008, 136 Pages, 2002/04
JNC-TN8410-2002-008.pdf:9.98MB
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.
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JNC TN8410 2002-002, 83 Pages, 2002/02
JNC-TN8410-2002-002.pdf:3.03MB
The Plutonium Fuel Center at Tokai Works has developed Waste Container Assay System to assay the amount of plutonium in a waste container. The Center has installed this equipment at PFPF in 1996 and had also calibrated this equipment to use as an accountancy control device since November of 1998 to January of 2000. Acceptance test for WCAS#1 was performed by IAEA in March of 2000, it has been used at safeduard inspection since June of 2000. The main characterization of WCAS#1 are as follows; (1)The assay error and the lower limits of detection decreases with a long time determination. (2)A suitable time of the determination for the WCAS#1 is 3600 seconds (waste container: 1800 sec+AAS: 1800sec). (3)The assay error with this assay time is about 5%(1 
). (4)The calculated lower limits of detection for WCAS#1 is about 5mg(Pu
eff.) for 1800 seconds.