Multi-batch core design study for innovative small modular reactor based on centrally-shielded burnable absorber
2
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
Various core designs with multi-batch fuel management (FM) are proposed and optimized for an innovative small modular reactor (iSMR), focusing on enhancing the inherent safety and neutronic performance. To achieve soluble-boron-free (SBF) operation, cylindrical centrally-shielded burnable absorbers (CSBAs) are utilized, reducing the burnup reactivity swing in both two- and three-batch FMs. All 69 fuel assemblies (FAs) are loaded with 2-cylindrical CSBA. Furthermore, the neutron economy is improved by deploying a truly-optimized PWR (TOP) lattice with a smaller fuel radius, optimized for neutron moderation under the SBF condition. The fuel shuffling and CSBA loading patterns are proposed for both 2- and 3-batch FM with the aim to lower the core leakage and achieve favorable power profiles. Numerical results show that both FM configurations achieve a small reactivity swing of about 1000 pcm and the power distributions are within the design criteria. The average discharge burnup in the two-batch core is comparable to three-batch commercial PWR like APR-1400. The proposed checker-board CR pattern with extended fingers effectively assures cold shutdown in the two-batch FM scenario, while in the three-batch FM, three N-1 scenarios are failed. The whole evaluation process is conducted using Monte Carlo Serpent 2 code in conjunction with ENDF/B-VII.1 nuclear library.
Abstract
Various core designs with multi-batch fuel management (FM) are proposed and optimized for an innovative small modular reactor (iSMR), focusing on enhancing the inherent safety and neutronic performance. To achieve soluble-boron-free (SBF) operation, cylindrical centrally-shielded burnable absorbers (CSBAs) are utilized, reducing the burnup reactivity swing in both two- and three-batch FMs. All 69 fuel assemblies (FAs) are loaded with 2-cylindrical CSBA. Furthermore, the neutron economy is improved by deploying a truly-optimized PWR (TOP) lattice with a smaller fuel radius, optimized for neutron moderation under the SBF condition. The fuel shuffling and CSBA loading patterns are proposed for both 2- and 3-batch FM with the aim to lower the core leakage and achieve favorable power profiles. Numerical results show that both FM configurations achieve a small reactivity swing of about 1000 pcm and the power distributions are within the design criteria. The average discharge burnup in the two-batch core is comparable to three-batch commercial PWR like APR-1400. The proposed checker-board CR pattern with extended fingers effectively assures cold shutdown in the two-batch FM scenario, while in the three-batch FM, three N-1 scenarios are failed. The whole evaluation process is conducted using Monte Carlo Serpent 2 code in conjunction with ENDF/B-VII.1 nuclear library.
참고문헌 (19)
- G. Locatelli, "Small modular reactors : a comprehensive overview of their economics and strategic aspects", Prog. Nucl. Energy, 73, pp.75~85 (2014)
- Esam M. A. Hussein, "Emerging small modular nuclear power reactors: a critical review", Phys. Open, 5 (2020)
- M. K. Rowinski, "Small and medium-sized reactors(SMR) : a review of technology", Renew. Sustain. Energy Rev, 44, pp.643~656 (2015)
- M. D. Carelli, "Handbook of Small Modular Nuclear Reactors" (2014), Elsevier
- Elimination of Soluble Boron for a New PWR Design, "EPRI", ~, pp.Report Document EPRI-NP-6536 (1989)
- M. S. Yahya, "Burnable absorber-integrated Guide Thimble(BigT)–I : design concepts and neutronic characterization on the fuel assembly benchmarks", J. Nucl. Sci. Technol, 53(7), pp.1048~1060 (2016)
- A. E. Abdelhameed, "A physics study for passivelyautonomous daily load-follow operation in soluble-boron-free SMR", International Congress on Advanced Nuclear Power Plants (2017)
- A. E. Abdelhameed, "Feasibility of passive autonomous frequency control operation in a Soluble-Boron-Free small PWR", Ann. Nucl. Energy, 116, pp.319~333 (2018)
- X. H. Nguyen, "An advanced core design for a soluble-boron-free small modular reactor ATOM with centrally-shielded burnable absorber", Nucl. Eng. Technol, 51, pp.369~376 (2019)
- M. S. Yahya, "An innovative core design for a soluble-boron-free small pressurized water reactor", Int. J. Energy Res, pp.1~9 (2017)
- N. R. Brown, "Impact of thermal spectrum small modular reactors on performance of once-through nuclear fuel cycles with low-enriched uranium", Ann. Nucl. Energy, 101, pp.166~173 (2017)
- X. H. Nguyen, "Truly-optimized PWR lattice for innovative solubleboron-free small modular reactor", Sci. Rep, 11, pp.12891~ (2021)
- J. Lepp¨anen, "The Serpent Monte Carlo code: status, development and applications in 2013", Ann. Nucl. Energy, 82, pp.142~150 (2015)
- M. B. Chadwick, "ENDF", B-VII.1 nuclear data for science and technology: cross sections, covariances, fission product yields and decay data, 2011, pp.112, 2887~2996
- X. H. Nguyen, "A New Burnable Absorber and Fuel Assembly Optimization for High-Performance Soluble-Boron-Free Small Modular Reactor", PhD, pp.2021
- S. Wijaya, "Possible power increase in a natural circulation soluble-boron-free small modular reactor using the truly optimized PWR lattice", Nucl. Eng. Technol, 55, pp.330~338 (2023)
- K. S. Kim, "Benchmark Matrix for Verification and Validation of the KARMA Code", KAERI, ~ (2010)
- M. J. Driscoll, "The Linear Reactivity Model for Nuclear Fuel Management" (1990), American Nuclear Society
- Design Control Document Tier 2, "KEPCO", ~, pp.APR1400-K-X-FS-14002-NP, R3 (2018)