SUPPORTING ANALYSIS AND DERIVATION OF DIMENSIONAL TOLERANCE SPECIFICATIONS FOR CORE II OF SM-1A & PM-2A

A method is presented for translating inspection measurements of fuel plate spacing to obtain minimum coolant channel clearances under reactor operating conditions. Considerations of fuel plate ripple growth and the inspection procedure used are included. The method is applied to establish dimensional tolerance specifications used for the procurement of SM-1A and PM-2A Core II. (auth

SUPPORTING ANALYSIS FOR THERMAL SUITABILITY OF FUEL ELEMENTS FOR SM-1A CORE I LOADING

A recommended SM-1A Core I loading chart was derived from available, metallurgically acceptable elements at the SM-1A and SM-1 sites. The derivation was based on local thermal and hydraulic considerations of minimum elementto- element coolant channel clearances. These clearances were determined from field inspection measurements of outer fuel plate spacing, as modified by analytical calculations of plate ripple growth during exposure to reactor operating thermal stresses. (auth