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Report No.

Preliminary inspection of secondary cooling system piping for maintenance plan in JMTR

Hanakawa, Hiroki ; Hanawa, Yoshio; Izumo, Hironobu; Fukasaku, Akitomi; Nagao, Yoshiharu ; Miyazawa, Masataka; Niimi, Motoji

The refurbished JMTR will start on FY 2011, and operate for a period of about 20 years. Before this plan, preliminary inspection of secondary cooling system piping was carried out in order to make a maintenance plan. As the results of this inspection, it was confirmed that the corrosion was reached by piping ingot, or decrease of piping thickness could hardly be observed. It was therefore confirmed that the strength or the functionality of the piping had been maintained by usual operation and maintenance. According to the results of this inspection, the basic date for maintenances are confirmed and it is clear to be able to make the maintenances plan in future.



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