| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for diagnosing the creep damage to piping, capable of evaluating the surface damage state of the piping in relation to the internal damage state thereof, capable of performing the rational diagnosis of the life of the piping and capable of considering a proper measures corresponding to a degree of damage. SOLUTION: The diagnosis of the surface life of the diagnosing region of the piping by a void area ratio method and the diagnosis of the internal life thereof by an ultrasonic method are performed and a counterplan is selected with respect to a case such that the life diagnosing resultϕC1 by the void area ratio method is more than a treatment limit valueϕa (ϕC1<=ϕa) and the life diagnosing resultϕC2 by the ultrasonic method is more than a treatment limit valueϕa (ϕC2>=ϕa), the case ofϕC1<ϕa andϕC2<ϕa and the case ofϕC1<ϕa andϕ2<ϕa.
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