発電用原子力設備規格 維持規格補修章改訂版の特徴

抄録

Rules on Repair, Replacement Activities (RRA) in Nuclear Power Plants (NPP) Fitness-For-Service (FFS) Code of the Japanese Society of Mechanical Engineers (JSME) have been under development since the 2004 Edition. It standardizes general requirements of the RRA rules and various kinds of repair method of construction. However, the RRA rules have been estimated as insufficiency for FFS Code by Japanese regulatory authorities. As the reason, they pointed out that the RRA rules and the regulatory standards are not directly comparable, and the RRA rules are not systematically arranged in relation to inspection and flaw evaluation rules of the JSME FFS Code. To resolve this issue, Task Group on development of RRA rules was organized under the Subcommittee on JSME FFS Code in order to restructure the RRA rules so as be more systematic. The result of the Task Group was reflected in the 2010 addenda of FSS Code 2008 Edition. In addition, the standardization of the new repair method such as Weld Overly (WOL) and New Peening, e.g., Ultrasonic Peening (USP) and Laser Peening (LP), is planned in the RRA rules recently.