Hitachi-Ge Nuclear Energy, Ltd.

Satoshi Shinohara

Naoyuki Kono

Yoshio Nonaka

Masahiro Miki

Motoyuki Nakamura

An object of the present invention is to provide an inspection apparatus for inspecting weld zones in a reactor pressure vessel, the inspection apparatus comprising: an ultrasonic probefor emitting an ultrasonic wave; a probe holding unitfor holding the ultrasonic probesuch that a ultrasonic wave transmitting surface of the ultrasonic probeis kept in direct contact with or at a constant distance from the outer surface of the reactor pressure vessel; a pressing unitfor pressing the probe holding unitparallel to a central axis of a control rod drive housingagainst the reactor pressure vessel; and a rotatorfor rotating the probe holding unitand the pressing unitabout the central axis of the control rod drive housing

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Tokai, Japan

Satoshi Shinohara