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A New Design Procedure for the Evaluation of Rod Bow DNBR Penalty

Paik, Hyun-Jong  
  • 초록

    In the thermal-hydraulic design, the effect of fuel rod bow is quantified tv the rod bow DNBR penalty which is a key design parameter to assure the coolability of fuel assembly in the pressurized water reactor. In this work, a computer program for the evaluation of the rod bow DNBR penalty based on Westinghouse methodology is developed and its application procedure is proposed. The computer simulation is based on the Monte-Carlo method. The qualification of developed computer program is performed by a comparison of calculational result with that given by Westinghouse's document. A new application procedure is built using batch mean and batch standard deviation. The normality of sample population generated by the batch calculation is confirmed by means of a chi-square test for goodness of fit. On the view point of statistics it is effected that the more reliable design value may be produced by the new application procedure.


  • 참고문헌 (8)

    1. DNB Test Results for New Mixing Vane Grids (R) , F.E. Motley;F.F. Cadek , WCAP-7985-L / v.,pp.,
    2. New Westinghouse Correlation WRB-1 for Predicting Critical Heat Flux in Rod Bundles with Mixing Vane Grids , F.E. Motley;K.W. Hill;F.F. Cadek;J. Schofcheck , WCAP-8762-P-A / v.,pp.,
    3. Fuel Rod Bow Evaluation , J. Skarika(et al) , WCAP-8691-RI / v.,pp.,
    4. Factors for One-Sided Tolerance Limits and for Variable Sampling Plans , D.B. Owen , SCR-607 / v.,pp.,
    5. Edwin L. Crow;Frances A. Davis;Margaret W , Statistics Manual / v.,pp.87,
    6. Reference Core Report-VAN-TAGE 5 Fuel Assembly , S.L. Davidson(ed.) , WCAP-10444-P-A / v.,pp.,
    7. Development of a Computer Code for the Evaluation of Rod Bow DNBR Penalty , H.J. Paik , Technical Report, KNFC R&D Center / v.,pp.,
    8. Application of Modified Spacer Factor to L-Grid Typical and Cold Wall Cell DNB , F.E. Motley;F.F. Cadek , WCAP-7988 / v.,pp.,

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