The LASTAC calibration experiments using pure water showed good result in reproducibility. Therefore, precise solution volume measurement needs a precise calibration function that is determined carefully. Solution volume in a tank is determined from substitution the solution level for the calibration function obtained in advance, which express a relation between the solution level and its volume in the tank. Demonstration experiments have been carried out to evaluate a precision of solution volume measurement and to establish the procedure of highly accurate pressure measurement for a large scale tank with dip-tube bubbler probe system to be applied to the input accountancy tank of RRP. Large Scale Tank Calibration (LASTAC) facility, including an experimental tank which has the same volume and structure as the input accountancy tank of Rokkasho Reprocessing Plant (RRP) was constructed in Nuclear Material Control Center of Japan. Uchikoshi, Seiji Watanabe, Yuichi Tsujino, Takeshi International Nuclear Information System (INIS) Volume measurement study for large scale input accountancy tank
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