Recent developments in the GENESIS code based on the Legendre polynomial expansion of angular flux method
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 ord...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2017-09-01
|
| Series: | Nuclear Engineering and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1738573317302929 |
| _version_ | 1818675571837632512 |
|---|---|
| author | Akio Yamamoto Akinori Giho Tomohiro Endo |
| author_facet | Akio Yamamoto Akinori Giho Tomohiro Endo |
| author_sort | Akio Yamamoto |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-12-17T08:29:42Z |
| format | Article |
| id | doaj.art-cc659bf472ed4aeb85e687eb39396540 |
| institution | Directory Open Access Journal |
| issn | 1738-5733 |
| language | English |
| last_indexed | 2024-12-17T08:29:42Z |
| publishDate | 2017-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Nuclear Engineering and Technology |
| spelling | doaj.art-cc659bf472ed4aeb85e687eb393965402022-12-21T21:56:39ZengElsevierNuclear Engineering and Technology1738-57332017-09-014961143115610.1016/j.net.2017.06.016Recent developments in the GENESIS code based on the Legendre polynomial expansion of angular flux methodAkio YamamotoAkinori GihoTomohiro EndoThis 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.http://www.sciencedirect.com/science/article/pii/S1738573317302929AccelerationAnisotropic scatteringC5G7 Benchmark ProblemGENESISSimplified PnStability |
| spellingShingle | Akio Yamamoto Akinori Giho Tomohiro Endo Recent developments in the GENESIS code based on the Legendre polynomial expansion of angular flux method Nuclear Engineering and Technology Acceleration Anisotropic scattering C5G7 Benchmark Problem GENESIS Simplified Pn Stability |
| title | Recent developments in the GENESIS code based on the Legendre polynomial expansion of angular flux method |
| title_full | Recent developments in the GENESIS code based on the Legendre polynomial expansion of angular flux method |
| title_fullStr | Recent developments in the GENESIS code based on the Legendre polynomial expansion of angular flux method |
| title_full_unstemmed | Recent developments in the GENESIS code based on the Legendre polynomial expansion of angular flux method |
| title_short | Recent developments in the GENESIS code based on the Legendre polynomial expansion of angular flux method |
| title_sort | recent developments in the genesis code based on the legendre polynomial expansion of angular flux method |
| topic | Acceleration Anisotropic scattering C5G7 Benchmark Problem GENESIS Simplified Pn Stability |
| url | http://www.sciencedirect.com/science/article/pii/S1738573317302929 |
| work_keys_str_mv | AT akioyamamoto recentdevelopmentsinthegenesiscodebasedonthelegendrepolynomialexpansionofangularfluxmethod AT akinorigiho recentdevelopmentsinthegenesiscodebasedonthelegendrepolynomialexpansionofangularfluxmethod AT tomohiroendo recentdevelopmentsinthegenesiscodebasedonthelegendrepolynomialexpansionofangularfluxmethod |