To enable penetration flaw inspection without contaminating a part other than an inspection part by sealing the outside of a range becoming the inner surface to be inspected of a pipe and filling and impregnating the inspection part with a penetration flaw detecting liquid to certainly coat the same.
In penetration flaw inspection, a flaw detection head 3 is connected to the leading end of a pole 4 to be inserted in a neutron flux monitor (ICM) housing 2 and attached to the housing so that a seal packing 7 surrounds a surface clad part 5 to be inspected. Next, air is supplied from a supply port 6 to bring the seal packing 7 into close contact with the inner surface of the ICM housing 2 to seal an inspection part 8 and a penetration flaw detecting liquid is injected from a supply port 9 to fill the inspection part 8. Air is discharged from a discharge port 10 simultaneously with injection and the injection of the penetration flaw detecting liquid is stopped when the penetration flaw detecting liquid begins to discharge and this state is held for a definite time to allow the penetration flaw detecting liquid to penetrate into the clad part 5. Thereafter, washing water is injected from the supply port 9 to wash the inspection part 8 and discharged from the supply port 9 by air injected from the discharge port 10.
NISHINO MASAYUKI
TAKADA HIROSHI
NAGAOKA MASAYOSHI
TOBE AKIRA
HITACHI ENG CO LTD
HITACHI KISOU KK