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Report No.
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Re-Evaluation of a Method for Monitoring Airborne$$^{3}$$H Discharge and its Contribution to Development of an Advanced Method

Koarashi, Jun; Yokota, Tomokazu*; Kozawa, Tomoyasu*; Isaka, Keisuke*; Mikami, Satoshi ; Kiyomitsu, Akiyama,; Kobayashi, Hirohide

Some investigations were made for re-evaluating collection and measurement techniques in an airborn $$^{3}$$H discharge monitoring at the Tokai reprocessing plant (TRP), which include (1)collection efficiency of water in a tritium sampler; (2)quench correction in $$^{3}$$H activity measurement by liquid scintillation counting; (3)affect of leakage in air sampling on evaluating airborne $$^{3}$$H discharge; and (4)determination of chemical forms of $$^{3}$$H in airborne release from the TRP. The results presented not only the validity of the TRP's monitoring method, but also the technical aspects required for establishing a more reliable and effective monitoring method.

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