DOI QR코드

DOI QR Code

Analysis of Loss of Condenser Vacuum Accident using a Conservative Approach with a Best-Estimate Code

최적코드를 이용한 복수기진공상실 사고의 보수적 해석

Jeong, Hae-Yong
정해용

  • Received : 2015.07.02
  • Accepted : 2015.09.10
  • Published : 2015.12.31

Abstract

A methodology to determine the most conservative initial condition based on random sampling of operation parameters is established, in which a best-estimate computer code is adopted to minimize the conservatism in code models. To validate the applicability of the suggested method, safety evaluation for a transient of loss of condenser vacuum in a pressurized water reactor is performed. One-hundred different initial conditions are generated by MOSAIQUE program automatically and the peak pressure for the most conservative case is determined from transient analyses. The safety margin obtained with the new approach is almost equivalent to the values determined with the existing methodologies. It is found that the time and human resources required for the safety evaluation could be reduced with the suggested approach.

Keywords

Evaluation Methodology;Safety Margin;Conservatism;Safety Analysis

References

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  2. L. L. Briggs, Uncertainty Quantification Approaches for Advanced Reactor Analyses, ANL-GenIV-110, ANL, Sep. 30, 2008.
  3. KAERI, MARS code manual, KAERI/TR-3042/ 2005, Dec. 2009.
  4. KHNP, Korea Non-LOCA Analysis Package, TRKHNP-0009, 2007.10 (in Korean).
  5. Jang, C. and Um, K., Applications of Integrated Safety Analysis Methodology to Reload Safety Evaluation, Nucl. Eng. Technol., Vol. 43, No. 2, April 2011.
  6. KAERI, MOSAIQUE Users Guide, Korea Atomic Energy Research Institute, 2014.6.

Acknowledgement

Supported by : 한국연구재단