Hitachi, Ltd.

Mitsuhiro Watanabe

Yutaka Fukui

Tomiharu Yoshida

Takashi Saito

Fumio Hataya

Yoshimi Ishii

Noriaki Mase

Yoshimitsu Tobita

Seiichi Akimoto

Zunichi Sugaya

A sliding mechanism comprising two members maintained in sliding contact with each other, wherein one of the members (which may be a pin) is formed of an alloy consisting essentially of, by weight, less than 0.3% carbon, 7-40% nickel, 15-28% chromium, 2-8% silicon, 3-12% manganese and the balance essentially iron, and the other member (which may be a roller) is formed of an alloy consisting essentially of, by weight, less than 0.5% carbon, 13-22% chromium, less than 2% silicon, less than 2% manganese, 3-10% molybdenum, 10% of at least one of titanium and aluminum and the balance essentially nickel, the two members having a difference in Vickers hardness of below 200 at their contact surfaces. The sliding mechanism has particualr utility as means for guiding a control rod of a nuclear reactor by means of pins and rollers.

Sliding mechanism

Apparatus for handling control rod drives (CRD's) attached by detachable fixing means to housings mounted in a reactor pressure vessel and each coupled to one of control rods inserted in the reactor pressure vessel. The apparatus for handling the CRD's comprise cylindrical housing means, uncoupling means mounted in the housing means for uncoupling each of the control rods from the respective CRD, means mounted on the housing means for effecting attaching and detaching of the fixing means, means for supporting the housing means, and means for moving the support means longitudinally of the CRD.

Apparatus for handling control rod drives

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Hitachi, Japan

Mitsuhiro Watanabe