On the basis of the technical investigations, the following general conclusions were reached: No new limitations are required for steam operation of the helium circulators; The present cast Pelton wheels could be safely operated for the planned or postulated accident conditions by imposing a lower limit on maximum Pelton wheel speed; Plant safety is not compromised at 105% power conditions with an imposed Pelton wheel speed limit of 7000 rpm. These general conclusions are based on specific facts and evidence obtained from (1) review of the operating history, (2) metalurgical investigations and analyses, (3) experimental results, (4) fracture mechanics analysis, and (5) plant safety analyses associated with reduced Pelton wheel maximum speed.


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    Title :

    Investigation Into the Cause and Consequence of the Fort St. Vrain Pelton Wheel Incipient Fractures


    Contributors:

    Publication date :

    1974


    Size :

    102 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English