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Jeong HS, Oh T, Kim Y. A leakage correction with burnup-dependent GPS method in two-step core depletion analysis. ANN NUCL ENERGY 2023. [DOI: 10.1016/j.anucene.2022.109624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Jang S, Kim Y. Improved macroscopic depletion in 2-D nodal analysis by 2x2 albedo-corrected parameterized equivalence constants method. ANN NUCL ENERGY 2022. [DOI: 10.1016/j.anucene.2022.109209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Yu H, Jang S, Kim Y. A New Embedded Analysis with Pinwise Discontinuity Factors for Pin Power Reconstruction. NUCL SCI ENG 2021. [DOI: 10.1080/00295639.2020.1867435] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Hwanyeal Yu
- Korea Advanced Institute of Science and Technology, 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Korea
| | - Seongdong Jang
- Korea Advanced Institute of Science and Technology, 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Korea
| | - Yonghee Kim
- Korea Advanced Institute of Science and Technology, 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Korea
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Jang S, Kim Y. A STUDY OF LEAKAGE-CORRECTED TWO-STEP METHOD BASED ON THE NODAL EQUIVALENCE THEORY FOR FAST REACTOR ANALYSIS. EPJ WEB OF CONFERENCES 2021. [DOI: 10.1051/epjconf/202124702026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The conventional two-step method based on the generalized equivalence theory (GET) cannot be directly applied to the fast reactor analysis since the assumption of the space-energy separability is not very valid due to a relatively long neutron mean free path. This study aims to develop a leakage-corrected two-step method for the fast reactor analysis with the aid of the albedo-corrected parameterized equivalence constants (APEC) method. The critical idea of the APEC method is to correct the homogenized group constants (HGCs) including discontinuity factors (DFs) during the nodal calculation through predetermined APEC functions. The APEC functions are functionalized in terms of the normalized leakage parameters such as a current-to-flux (CFR) ratio so that they can correct the cross-sections (XSs) and discontinuity factors by reflecting the in-situ neutron leakage information of the nodal analysis. The feasibility of the APEC-corrected two-step method was investigated by solving 5-group diffusion equations for a two-dimensional sodium-cooled fast reactor with a 6-triangle finite difference method. The 5-group HGCs for fuel assemblies were determined by using a continuous-energy Monte Carl code, and the conventional assembly discontinuity factors are also introduced for each hexagonal fuel assembly. First of all, it was demonstrated that the simple FDM scheme could reproduce the reference nodal quantities with the GET. And the APEC functions are formulated using the reference solutions to evaluate the feasibility of simple APEC functional for both XSs and DFs. Then, a smaller color-set problem was defined to determine practical APEC functions for the original benchmark, and various numerical evaluations are performed in terms of the k-eff value and nodal power distribution.
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Improved nodal equivalence with leakage-corrected cross sections and discontinuity factors for PWR depletion analysis. NUCLEAR ENGINEERING AND TECHNOLOGY 2019. [DOI: 10.1016/j.net.2019.02.013] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Yu H, Kim W, Kim Y. A leakage correction with SPH factors for two-group constants in GET-based pin-by-pin reactor analyses. ANN NUCL ENERGY 2019. [DOI: 10.1016/j.anucene.2019.01.032] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Kim H, Kim W, Kim Y. Generation of Exact Discontinuity Factors for NEM Calculations with Two-by-Two Division per Fuel Assembly. NUCL SCI ENG 2019. [DOI: 10.1080/00295639.2018.1542867] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- HyeonTae Kim
- Korea Advanced Institute of Science and Technology, Department of Nuclear & Quantum Engineering, Daejeon 34141, Korea
| | - Woosong Kim
- 111 Daedeok-daero 989 beon-gil, Yuseong-gu, Korea Atomic Energy Research Institute, 34057, Daejeon, Korea
| | - Yonghee Kim
- Korea Advanced Institute of Science and Technology, Department of Nuclear & Quantum Engineering, Daejeon 34141, Korea
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Motalab MA, Kim W, Kim Y. A New Two-Step Methodology for CANDU Analysis with the APEC-Assisted Nodal Equivalence Theory. NUCL TECHNOL 2019. [DOI: 10.1080/00295450.2019.1582942] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Mohammad Abdul Motalab
- Korea Advanced Institute of Science and Technology, 291 Daehak-ro, Yuseong-gu, Daejeon, Korea 34141
| | - Woosong Kim
- Korea Atomic Energy Research Institute, 111 Daedeok-daero 989beon-gil, Yuseong-gu, Daejeon, Korea 34057
| | - Yonghee Kim
- Korea Advanced Institute of Science and Technology, 291 Daehak-ro, Yuseong-gu, Daejeon, Korea 34141
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A two-dimensional modal method for spatial rehomogenization of nodal cross sections and discontinuity-factor correction. ANN NUCL ENERGY 2019. [DOI: 10.1016/j.anucene.2018.10.012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Kim W, Lee K, Kim Y. Functionalization of the Discontinuity Factor in the Albedo-Corrected Parameterized Equivalence Constants (APEC) Method. NUCL SCI ENG 2018. [DOI: 10.1080/00295639.2018.1497396] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Woosong Kim
- Korea Advanced Institute of Science and Technology, 291 Daehak-ro, Yuseong-gu, Daejeon, Korea 34141
| | - Kyunghoon Lee
- Korea Advanced Institute of Science and Technology, 291 Daehak-ro, Yuseong-gu, Daejeon, Korea 34141
- Korea Atomic Energy Research Institute, 111 Daedeok-daero 989beon-gil, Yuseong-gu, Daejeon, Korea 34057
| | - Yonghee Kim
- Korea Advanced Institute of Science and Technology, 291 Daehak-ro, Yuseong-gu, Daejeon, Korea 34141
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Gamarino M, Dall’Osso A, Lathouwers D, Kloosterman JL. A neutron-leakage spectrum model for on-the-fly rehomogenization of nodal cross sections. ANN NUCL ENERGY 2018. [DOI: 10.1016/j.anucene.2018.02.028] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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