Mitsubishi Heavy Industries Limited

Harutaka Suzuki

Ryuichi Narita

Nobuyuki Hori

Koji Okimura

Moritatsu Nishimura

[Problem] To facilitate mounting of a nozzle. [Solving Means] In a nozzle mounting structure for mounting a nozzlepenetrating through a reactor vesselhaving a hemispherical concave inner surface, the nozzle mounting structure includes a removed concave portionin which a base materialon an inner surface side of the reactor vesselis removed in a symmetrical shape around a normal line N on the hemispherical concave inner surface of the reactor vessel, a flangeprovided on the nozzle, formed in a same symmetrical shape as that of the removed concave portionaround the normal line N, and inserted into the removed concave portion, and a weld partprovided around the normal line N for welding the flangeto the reactor vessel

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Tokyo, Japan

Harutaka Suzuki