Development of RAPID transport calculation with heterogeneous temperature distribution
| Autor: | William J. Walters, Donghao He |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Fission
Computer science Plane (geometry) 020209 energy Monte Carlo method 02 engineering and technology 01 natural sciences 010305 fluids & plasmas Matrix (mathematics) Nuclear Energy and Engineering 0103 physical sciences 0202 electrical engineering electronic engineering information engineering Benchmark (computing) Root-mean-square deviation Algorithm Matrix method Interpolation |
| Zdroj: | Annals of Nuclear Energy. 148:107685 |
| ISSN: | 0306-4549 |
| Popis: | The RAPID hybrid transport code, based on the fission matrix method, has been developed and previously proven successful on BEAVRS benchmark at hot-zero-power condition. In this work, it is extended to the BEAVRS model to include fuel and moderator temperature feedback. The bi-linear fission matrix interpolation technique was applied to several artificial fuel and moderator temperature distributions. For almost all cases, it provides an accurate calculation result with a k eff difference smaller than 70 pcm and 2D pin-wise RMS error smaller than 1 % compared to Serpent 2 Monte Carlo reference. In order to decrease the number of databases needed, a plane interpolation routine is developed, which de-couples the fuel and moderator temperature. The RAPID calculation with the plane interpolation reports a similar accuracy to that with the bi-linear interpolation. The bi-linear interpolation required 24 database points from Monte Carlo calculations, while the plane interpolation only needed 10. The plane interpolation allows RAPID to prepare fewer databases while preserving a high accuracy. |
| Databáze: | OpenAIRE |
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