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Report No.
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Evaluation of curve for tritium release rate into primary coolant for research and testing reactors

Kenzhina, I. E.*; Ishitsuka, Etsuo  ; Okumura, Keisuke ; Takemoto, Noriyuki ; Mukanova, A.*; Chikhray, Y.*

Increase of tritium concentration in the primary coolant for research and testing reactors during reactor operation had been reported. To clarify the tritium sources, a curve of tritium release rate into the primary coolant for the JMTR and JRR-3M are evaluated. As a result, the tritium release rate is related with produced $$^{6}$$Li by (n,$$alpha$$) reaction from $$^{9}$$Be, and evaluation results of tritium release curve are shown as the dominant source of tritium release into the primary coolant for the JMTR and JRR-3M are beryllium components. Scattering of the tritium release rate with irradiation time were observed, and this phenomena in the JMTR occurred in earlier time than that of the JRR-3M.

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