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JMTR二次冷却系配管の保全計画策定のための予備調査

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

花川 裕規; 塙 善雄; 出雲 寛互; 深作 秋富; 長尾 美春; 宮澤 正孝; 新見 素二

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

JMTRは改修後2011年から再稼動し約20年間の長期に渡り運転していく計画である。この再稼動に先立ち、二次冷却系配管の保全計画策定のための予備調査を行った。この予備調査の結果、配管自体の腐食はほとんどないことがわかった。これよりいままでの通常の保守方法により配管としての機能を十分に維持できることがわかった。今回の調査結果より二次冷却系配管の保全計画を策定するための基礎的なデータを取得することができた。

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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