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Report No.

Maintenance of manufacturing facility of high pressure gas in HTTR

Sekita, Kenji; Arakaki, Etsushi; Wakabayashi, Hiroshi

The Liquid Nitrogen (LN$$_{2}$$) manufacturing facility in HTTR, is a high-pressure gas manufacturing facility. The facility provides LN$$_{2}$$ to cold charcoal trap (CCT) in primary and secondary helium purification systems, impurities gas trap for gas chromatography mass spectrometer in primary and secondary helium sampling systems. The facility has been performed periodical inspection according to the law and rule, and each inspection item satisfied the judgment value. Thus, it was confirmed that the maintenance of LN$$_{2}$$ manufacturing facility was appropriate. In addition, the effective and efficient LN$$_{2}$$ amount to be consumed was clarified on the basis of the monitoring. Results of the liquid level of the storage tank and the consumption of LN$$_{2}$$ as the reactor was operated or stopped, by considering the filling frequency and amount of the filling of LN$$_{2}$$ to the facility by a tank lorry. This report describes method and result of periodical inspection and equipment management.



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