Nuclear Engineering and Technology

  • 제49권6호
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  • Pages.1143-1156
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  • 2017
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  • 1738-5733(pISSN)
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  • 2234-358X(eISSN)
한국원자력학회 (Korean Nuclear Society)
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Recent developments in the GENESIS code based on the Legendre polynomial expansion of angular flux method

  • 투고 : 2017.05.28
  • 심사 : 2017.06.27
  • 발행 : 2017.09.25
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초록

This paper describes recent development activities of the GENESIS code, which is a transport code for heterogeneous three-dimensional geometry, focusing on applications to reactor core analysis. For the treatment of anisotropic scattering, the concept of the simplified Pn method is introduced in order to reduce storage of flux moments. The accuracy of the present method is verified through a benchmark problem. Next, the iteration stability of the GENESIS code for the highly voided condition, which would appear in a severe accident (e.g., design extension) conditions, is discussed. The efficiencies of the coarse mesh finite difference and generalized coarse mesh rebalance acceleration methods are verified with various stabilization techniques. Use of the effective diffusion coefficient and the artificial grid diffusion coefficients are found to be effective to stabilize the acceleration calculation in highly voided conditions.

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참고문헌

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피인용 문헌

  1. Transport consistent diffusion coefficient for CMFD acceleration and comparison of convergence properties vol.56, pp.8, 2017, https://doi.org/10.1080/00223131.2019.1618405
  2. Impact of Various Parameters on Convergence Performance of CMFD Acceleration for MOC in Multigroup Heterogeneous Geometry vol.194, pp.6, 2017, https://doi.org/10.1080/00295639.2020.1722512