Abstract

Method of integrated leak rate test (ILRT) of reactor containment vessel for LMFBR is different from that of LWR, since the test is required to be conducted under operating condition of the reactor sodium coolant system, primary argon cover gas system and air conditioning system. So, it is a diffculty to obtain an adequate measurement accuracy under these conditions.The diffculty was solved by the past three ILRTs condcted in JOYO, and accuracy of the data was confirmed to be almost equal to that of LWR.From these, the adequacy of the test method and the test instrumentation system was demonstrated and the ILRT of LMFBR was established.

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