LMFBR system analysis: Impact of heat transport system on core thermal-hydraulics
| Autor: | Ashok K. Agrawal, I.K. Madni |
|---|---|
| Rok vydání: | 1980 |
| Předmět: |
Nuclear and High Energy Physics
Engineering Buoyancy Piping business.industry Mechanical Engineering Nuclear engineering Mechanical engineering Systems modeling engineering.material Thermal hydraulics Natural circulation Nuclear Energy and Engineering Nuclear reactor core Boiling Heat exchanger General Materials Science Safety Risk Reliability and Quality business Waste Management and Disposal |
| Zdroj: | Nuclear Engineering and Design. 62:199-218 |
| ISSN: | 0029-5493 |
| DOI: | 10.1016/0029-5493(80)90029-1 |
| Popis: | In discussing LMFBR thermal-hydraulic analysis, this paper focuses on the heat transport system and its impact on the predicted core behavior, particularly during off-normal or protected accident transients. Following a brief background of related work in the area of system simulation for both loop and pool-type LMFBR designs, modeling considerations for individual components such as reactor core, piping, pumps, heat exchangers and check valves, together with the overall integrated approach to system simulation, are discussed. The need for, and current approaches to, modeling pool stratification are also examined. The role of buoyancy forces in the system is clarified, with particular emphasis on its increasing influence during flow decay. Sample results are presented to illustrate the influence of system modeling details, and selection of component parameters and operational mode, on predicted core thermal-hydraulic response during protected loss-of-flow transients. From a systematic study of the effect of pump inertia for a flow coastdown to natural circulation event in a loop-type design, it is found that certain combinations of primary and secondary pump inertias can lead to core flow reversal for a sustained period, and eventual boiling in the hot fuel channel. This effect, based on its impact on core flow, is even more pronounced in pool-type designs. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|