Li LIU, Yinghong ZUO, Shengli NIU, Jinhui ZHU, Peng SHANG, Xuedong WANG. Application of global variance reduction methods for the calculation of γ radiation field in a large space[J]. NUCLEAR TECHNIQUES, 2024, 47(2): 020602
- NUCLEAR TECHNIQUES
- Vol. 47, Issue 2, 020602 (2024)
Fig. 1. Geometric model for the computation of large-space γ radiation field (color online)
Fig. 2. Calculated γ fluence and error in the circular and rectangular grid cells with respect to distance
Fig. 3. Error distribution of γ flux obtained using different variance reduction methods
Fig. 4. Lower limit of the weight window wth in the near-ground cell computed using different GVR methods with volume modification (color online)
Fig. 5. Simulated particle number Nps in the near-ground cells simulated using GVR-P method (color online)
Fig. 6. Error distribution of γ flux computed using three GVR methods
Fig. 7. γ flux distribution computed using three GVR-W methods
Fig. 8. Distribution of wth computed using GVR-W methods
Fig. 9. wth in the near-ground cell computed using GVR methods based on information of different particles (color online)
Fig. 10. wth in the near-ground cell computed using GVR methods with different SI values (color online)
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Table 1. Main parameters simulated using different variance reduction methods
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Table 2. Main parameters computed using volume modification and different non-count area modifications
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Table 3. Main parameters simulated using seven GVR methods (3rd iteration)
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Table 4. Main parameters computed using GVR methods with different SI values (3rd iteration)
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