An innovative core design for a soluble-boron-free small pressurized water reactor
Control rods; Monte Carlo methods; Small nuclear reactors; Stainless steel; BigT; Burnable absorber; Burnup reactivity swing; Control rod patterns; Nuclear data library; Radial power distributions; Radial power profile; Small modular reactors; Pressurized water reactors
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John Wiley and Sons Ltd
2023
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my.uniten.dspace-242252023-05-29T14:57:09Z An innovative core design for a soluble-boron-free small pressurized water reactor Yahya M.-S. Kim Y. 56287449000 57196440838 Control rods; Monte Carlo methods; Small nuclear reactors; Stainless steel; BigT; Burnable absorber; Burnup reactivity swing; Control rod patterns; Nuclear data library; Radial power distributions; Radial power profile; Small modular reactors; Pressurized water reactors This research investigates the neutronic feasibility of a high-performance soluble-boron-free (SBF) small modular reactor (SMR) core based on a new burnable absorber concept called the �Burnable Absorber-Integrated Guide Thimble� (BigT). Three unique BigT designs were loaded into the core; each BigT design was judiciously ascertained from the core radial power profile to tailor the required reactivity depletion patterns for an SBF operation. The approach is demonstrated to work well as the SBF SMR design exceeds the targeted cycle length while successfully controlling its burnup reactivity swing between 634 and 800�pcm throughout most of its operation. This paper also describes the use of hafnium-doped stainless steel as mechanical shim (MS) rods to attain the core criticality. Because the worth of the MS rods is relatively small, insertion and withdrawal of the rods during operation hardly alter the core radial power distributions. The resulting axial power profile, meanwhile, displays a more refined bottom-skewed pattern during the early portion of the irradiation cycle due to partial top-half insertion of the MS rods. This investigation further deliberates on a modified checker board control rod pattern to assure safe cold shutdown of the core. All calculations in this multiphysics assessment of the 3D SBF SMR core were completed by using a 2-step Monte Carlo deterministic hybrid procedure based on the Monte Carlo Serpent and COREDAX diffusion codes with the ENDF/B-7.1 nuclear data library. Copyright � 2017 John Wiley & Sons, Ltd. Final 2023-05-29T06:57:09Z 2023-05-29T06:57:09Z 2018 Conference Paper 10.1002/er.3792 2-s2.0-85038599595 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85038599595&doi=10.1002%2fer.3792&partnerID=40&md5=562a42e15fa70a977f39bb23853c7e54 https://irepository.uniten.edu.my/handle/123456789/24225 42 1 73 81 All Open Access, Bronze John Wiley and Sons Ltd Scopus |
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| description |
Control rods; Monte Carlo methods; Small nuclear reactors; Stainless steel; BigT; Burnable absorber; Burnup reactivity swing; Control rod patterns; Nuclear data library; Radial power distributions; Radial power profile; Small modular reactors; Pressurized water reactors |
| author2 |
56287449000 |
| author_facet |
56287449000 Yahya M.-S. Kim Y. |
| format |
Conference Paper |
| author |
Yahya M.-S. Kim Y. |
| spellingShingle |
Yahya M.-S. Kim Y. An innovative core design for a soluble-boron-free small pressurized water reactor |
| author_sort |
Yahya M.-S. |
| title |
An innovative core design for a soluble-boron-free small pressurized water reactor |
| title_short |
An innovative core design for a soluble-boron-free small pressurized water reactor |
| title_full |
An innovative core design for a soluble-boron-free small pressurized water reactor |
| title_fullStr |
An innovative core design for a soluble-boron-free small pressurized water reactor |
| title_full_unstemmed |
An innovative core design for a soluble-boron-free small pressurized water reactor |
| title_sort |
innovative core design for a soluble-boron-free small pressurized water reactor |
| publisher |
John Wiley and Sons Ltd |
| publishDate |
2023 |
| _version_ |
1806424125561896960 |
| score |
13.211869 |