Development and Assessment of the Appendix K Version of RELAP5-3D for LOCA Licensing Analysis
| Autor: | Thomas K. S. Liang, Huan-Jen Hung, Chin-Jang Chang |
|---|---|
| Rok vydání: | 2002 |
| Předmět: |
Nuclear and High Energy Physics
Test facility Computer science 020209 energy Nuclear engineering Pressurized water reactor TRAC 02 engineering and technology Nuclear reactor Condensed Matter Physics law.invention Thermal hydraulics 020303 mechanical engineering & transports 0203 mechanical engineering Nuclear Energy and Engineering law 0202 electrical engineering electronic engineering information engineering Light-water reactor computer computer.programming_language |
| Zdroj: | Nuclear Technology. 139:233-252 |
| ISSN: | 1943-7471 0029-5450 |
| Popis: | In light water reactors, particularly the pressurized water reactor (PWR), the severity of a loss-of-coolant accident (LOCA) would limit how high the reactor power can operate. Although the best-estimate LOCA licensing methodology can provide the greatest margin on the peak cladding temperature (PCT) evaluation during a LOCA, it generally takes much more resources to develop. Instead, implementation of evaluation models required by Appendix K of 10CFR50 on an advanced thermal-hydraulic platform such as RELAP5, TRAC, etc., also can gain significant margin for the PCT calculation. Through compliance evaluation against Appendix K of 10CFR50, all of the required evaluation models have been implemented in RELAP5-3D. To verify and assess the development of the Appendix K version of RELAP5-3D, nine kinds of separate-effects experiments and eight sets of LOCA integral experiments were adopted. Through the assessments against separate-effects experiments, the success of the code modification in accordance with Appendix K of 10CFR50 was demonstrated. Besides, one set of a typical integral large-break LOCA from Loss-of-Fluid Test Facility experiments (L2-5) has also been applied to preliminarily evaluate the integral performance of the Appendix K version of RELAP5-3D. The PCT predicted by the evaluation models is greater than the one from best-estimate calculation inmore » the whole LOCA history with the conservatism of 150 K, and the measured PCTs of L2-5 are also well bounded by the evaluation model calculation. Another seven sets of integral-effect experiments will be further applied in the next step to ensure the reasonable integral conservatism of the newly developed LOCA licensing analysis code (RELAP5-3DK/INER), which can cover all the phases of both large- and small LOCA in one code.« less |
| Databáze: | OpenAIRE |
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