NUCLEAR TECHNIQUES, Volume. 46, Issue 5, 050603(2023)
Core neutron source generation method for nuclear reactor shielding calculation
Figures & Tables(9)
Fig. 1. Neutron importance of core for the pressure vessel in the NUREG/CR-6115 model
Fig. 3. Geometric grid source mapping method (a) Geometric grid segmentation, (b) Sub-grid source calculation, (c) Geometric grid source assignment
Fig. 4. Geometric diagram of the NUREG/CR-6115 benchmark model 1-Core baffle, 2-Core barrel, 3-Inner inlet water gap, 4-Thermal shield, 5-Reactor pressure vessel liner, 6-Air gap, 7-Pressure vessel insulation, 8-Biological shield liner
Fig. 5. Source distribution of the NUREG/CR-6115 model (a) Average source calculation algorithm, (b) Multi-weight source mesh mapping algorithm
Fig. 6. Neutron spectrum distribution on internal surface of pressure vessel (a) Axial peak location, (b) RPV lower weld location
Fig. 7. Axial-normalized relative power distribution of the NUREG/CR-6115 model
Table 1. Root mean square (RMS) of the relative error for fast neutron fluence in reactor pressure vessel (E>1.0 MeV)
View tableView in ArticleTable 1. Root mean square (RMS) of the relative error for fast neutron fluence in reactor pressure vessel (E>1.0 MeV)
位置
Location
RMS / % ARES-DORT ARES-MCNP 多权重源强网格
映射算法
Multi-weight source
mesh mapping
algorithm
平均源强
计算方法
Average source
calculation
algorithm
多权重源强网格
映射算法
Multi-weight source mesh
mapping algorithm
平均源强
计算方法
Average source
calculation
algorithm
轴向峰值处
Axial peak location
内表面Internal surface 13.046 4 12.241 5 3.537 4 7.171 2 1/4壁厚1/4 thickness 13.145 8 13.185 3 5.746 6 10.242 5 1/2壁厚1/2 thickness 14.386 2 15.652 6 — — 焊缝处
Lower weld location
内表面Internal surface 13.271 6 21.819 7 2.722 1 21.183 1 1/4壁厚1/4 thickness 13.257 5 24.758 0 — — 1/2壁厚1/2 thickness 14.371 4 29.691 0 — —
Table 2. Influence of neutron source distribution
View tableView in ArticleTable 2. Influence of neutron source distribution
位置Location 外围组件源强层级数Peripheral component source levels 0 1 2 1.0 MeV 0.1 MeV 1.0 MeV 0.1 MeV 1.0 MeV 0.1 MeV 反应堆压力容器内表面Reactor pressure vessel internal surface 20.61% 19.64% 0.43% -0.01% -0.01% -0.01% 反应堆压力容器1/4壁厚Reactor pressure vessel 1/4 thickness 20.78% 19.84% 0.47% 0.00% -0.01% 0.00% 反应堆压力容器1/2壁厚Reactor pressure vessel 1/2 thickness 20.77% 19.79% 0.46% -0.01% -0.01% -0.01% 反应堆压力容器3/4壁厚Reactor pressure vessel 3/4 thickness 20.62% 19.67% 0.45% -0.01% -0.01% -0.01% 反应堆压力容器外表面Reactor pressure vessel outside surface 20.64% 19.58% 0.45% -0.01% 0.00% -0.01% 平均值Average 20.68% 19.70% 0.45% -0.01% -0.01% -0.01%
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Pingxun ZHANG, Bin ZHANG, Yixue CHEN. Core neutron source generation method for nuclear reactor shielding calculation[J]. NUCLEAR TECHNIQUES, 2023, 46(5): 050603
Paper Information
Category: Research Articles
Received: Jul. 7, 2022
Accepted: --
Published Online: Jun. 30, 2023
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