Analysis for the Effect of Spatial Discretization Method on AP1000 Reactor Pressure Vessel Fluence Calculation
Maintaining the structural integrity of the reactor pressure vessel (RPV) is a critical concern related to the safe operation of nuclear power plants. To estimate the structural integrity over the designed lifetime and to support analyses for a potential plant life extension, an accurate calculation...
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| Format: | Article |
| Language: | English |
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Wiley
2016-01-01
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| Series: | Science and Technology of Nuclear Installations |
| Online Access: | http://dx.doi.org/10.1155/2016/3461290 |
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| author | Junxiao Zheng Bin Zhang Shengchun Shi Yixue Chen |
| author_facet | Junxiao Zheng Bin Zhang Shengchun Shi Yixue Chen |
| author_sort | Junxiao Zheng |
| collection | DOAJ |
| description | Maintaining the structural integrity of the reactor pressure vessel (RPV) is a critical concern related to the safe operation of nuclear power plants. To estimate the structural integrity over the designed lifetime and to support analyses for a potential plant life extension, an accurate calculation of the fast neutron fluence (E>1.0 MeV or E>0.1 MeV) at the RPV is significant. The discrete ordinates method is one of the main methods to solve such problems. During the calculation process, many factors will affect the results. In this paper, the deviations introduced by different differencing schemes and mesh sizes on the AP1000 RPV fast neutron fluence have been studied, which are based on new discrete ordinates code ARES. The analysis shows that the differencing scheme (diamond difference with or without linear zero fix-up, theta weighted, directional theta weighted, and exponential directional weighted) introduces a deviation within 4%. The coarse mesh (4 × 4 cm meshes in XY plane) leads to approximately 23.7% calculation deviation compared to those of refined mesh (1 × 1 cm meshes in XY plane). Comprehensive study on the deviation introduced by differencing scheme and mesh size has great significance for reasoned evaluation of RPV fast neutron fluence calculation results. |
| format | Article |
| id | doaj-art-5811025d3ae14b86bfc00318871d86f7 |
| institution | Kabale University |
| issn | 1687-6075 1687-6083 |
| language | English |
| publishDate | 2016-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Science and Technology of Nuclear Installations |
| spelling | doaj-art-5811025d3ae14b86bfc00318871d86f72025-02-03T01:10:30ZengWileyScience and Technology of Nuclear Installations1687-60751687-60832016-01-01201610.1155/2016/34612903461290Analysis for the Effect of Spatial Discretization Method on AP1000 Reactor Pressure Vessel Fluence CalculationJunxiao Zheng0Bin Zhang1Shengchun Shi2Yixue Chen3School of Nuclear Science and Engineering, North China Electric Power University, Beijing 102206, ChinaSchool of Nuclear Science and Engineering, North China Electric Power University, Beijing 102206, ChinaNuclear and Radiation Safety Center, Beijing 100082, ChinaSchool of Nuclear Science and Engineering, North China Electric Power University, Beijing 102206, ChinaMaintaining the structural integrity of the reactor pressure vessel (RPV) is a critical concern related to the safe operation of nuclear power plants. To estimate the structural integrity over the designed lifetime and to support analyses for a potential plant life extension, an accurate calculation of the fast neutron fluence (E>1.0 MeV or E>0.1 MeV) at the RPV is significant. The discrete ordinates method is one of the main methods to solve such problems. During the calculation process, many factors will affect the results. In this paper, the deviations introduced by different differencing schemes and mesh sizes on the AP1000 RPV fast neutron fluence have been studied, which are based on new discrete ordinates code ARES. The analysis shows that the differencing scheme (diamond difference with or without linear zero fix-up, theta weighted, directional theta weighted, and exponential directional weighted) introduces a deviation within 4%. The coarse mesh (4 × 4 cm meshes in XY plane) leads to approximately 23.7% calculation deviation compared to those of refined mesh (1 × 1 cm meshes in XY plane). Comprehensive study on the deviation introduced by differencing scheme and mesh size has great significance for reasoned evaluation of RPV fast neutron fluence calculation results.http://dx.doi.org/10.1155/2016/3461290 |
| spellingShingle | Junxiao Zheng Bin Zhang Shengchun Shi Yixue Chen Analysis for the Effect of Spatial Discretization Method on AP1000 Reactor Pressure Vessel Fluence Calculation Science and Technology of Nuclear Installations |
| title | Analysis for the Effect of Spatial Discretization Method on AP1000 Reactor Pressure Vessel Fluence Calculation |
| title_full | Analysis for the Effect of Spatial Discretization Method on AP1000 Reactor Pressure Vessel Fluence Calculation |
| title_fullStr | Analysis for the Effect of Spatial Discretization Method on AP1000 Reactor Pressure Vessel Fluence Calculation |
| title_full_unstemmed | Analysis for the Effect of Spatial Discretization Method on AP1000 Reactor Pressure Vessel Fluence Calculation |
| title_short | Analysis for the Effect of Spatial Discretization Method on AP1000 Reactor Pressure Vessel Fluence Calculation |
| title_sort | analysis for the effect of spatial discretization method on ap1000 reactor pressure vessel fluence calculation |
| url | http://dx.doi.org/10.1155/2016/3461290 |
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