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The neutronics effect of TRISO duplex fuel packing fractions and their comparison with homogeneous thorium-uranium fuel

Fuels; High temperature reactors; Thorium; Uranium; Burn up; Cycle length; Fuel rods; High-temperature reactor; Long cycles; Micro modular reactor; Modular reactors; Packing fractions; Thorium reactor; TRISO-duplex; Doppler effect

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Bibliographic Details
Main Authors: Rabir M.H., Ismail A.F., Yahya M.S.
Other Authors: 55898782000
Format: Article
Published: John Wiley and Sons Ltd 2023
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spelling my.uniten.dspace-267112023-05-29T17:36:16Z The neutronics effect of TRISO duplex fuel packing fractions and their comparison with homogeneous thorium-uranium fuel Rabir M.H. Ismail A.F. Yahya M.S. 55898782000 29067828200 56287449000 Fuels; High temperature reactors; Thorium; Uranium; Burn up; Cycle length; Fuel rods; High-temperature reactor; Long cycles; Micro modular reactor; Modular reactors; Packing fractions; Thorium reactor; TRISO-duplex; Doppler effect To improve the performance of the thorium fuel, the duplex fuel potential for the micro-sized high-temperature reactor (HTR) using TRISO fuel has previously been investigated. The objective of this work is to expand on past research by delving deeper into several crucial components of the microheterogeneous thorium-uranium TRISO fuel compact. The MCNPX simulation was used to compare the neutronic performance of TRISO duplex fuel to that of homogeneous (Th,U)O2 fuel at various packing fractions and 235U enrichment. Variations in duplex fuel packing fraction and 235U enrichment were shown to have a significant effect on the neutronics of TRISO fuel. The fuel rod with 20% TRISO packing fraction has the highest kinf value at BOC, fastest burnup rate, fastest 235U depletion, and longest cycle length. As the packing fraction increases, these values however deteriorate in the opposite direction. Furthermore, the conversion ratio increases and the Doppler effect becomes stronger. The findings of evaluating duplex fuel rods at the fuel block level differed. The 40% packing fraction fuel block model achieves the lowest reactivity swing, the strongest Doppler effect, and the longest cycle length. As its packing fractions reduced to 30% and 20%, the values changed in the opposite direction. In comparison to the duplex fuel design, the homogenous TRISO fuel has a lower achievable discharged burnup and shorter cycle length. However, at the beginning of its cycle, it has a stronger doppler effect and lower pin power peaking. Despite the fact that the duplex's power peaking value drops with increasing burnup and becomes comparable to homogeneous fuel, these are some of the challenges and concerns that should be addressed in future research. Despite this, the overall result indicates that the duplex fuel design has promising potential for application in a micro-sized HTR. � 2022 John Wiley & Sons Ltd. Final 2023-05-29T09:36:16Z 2023-05-29T09:36:16Z 2022 Article 10.1002/er.8226 2-s2.0-85131560623 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85131560623&doi=10.1002%2fer.8226&partnerID=40&md5=24e2ffbb2b18261d51e15d7028f485e4 https://irepository.uniten.edu.my/handle/123456789/26711 46 13 19072 19089 John Wiley and Sons Ltd Scopus
institution Universiti Tenaga Nasional
building UNITEN Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Tenaga Nasional
content_source UNITEN Institutional Repository
url_provider http://dspace.uniten.edu.my/
description Fuels; High temperature reactors; Thorium; Uranium; Burn up; Cycle length; Fuel rods; High-temperature reactor; Long cycles; Micro modular reactor; Modular reactors; Packing fractions; Thorium reactor; TRISO-duplex; Doppler effect
author2 55898782000
author_facet 55898782000
Rabir M.H.
Ismail A.F.
Yahya M.S.
format Article
author Rabir M.H.
Ismail A.F.
Yahya M.S.
spellingShingle Rabir M.H.
Ismail A.F.
Yahya M.S.
The neutronics effect of TRISO duplex fuel packing fractions and their comparison with homogeneous thorium-uranium fuel
author_sort Rabir M.H.
title The neutronics effect of TRISO duplex fuel packing fractions and their comparison with homogeneous thorium-uranium fuel
title_short The neutronics effect of TRISO duplex fuel packing fractions and their comparison with homogeneous thorium-uranium fuel
title_full The neutronics effect of TRISO duplex fuel packing fractions and their comparison with homogeneous thorium-uranium fuel
title_fullStr The neutronics effect of TRISO duplex fuel packing fractions and their comparison with homogeneous thorium-uranium fuel
title_full_unstemmed The neutronics effect of TRISO duplex fuel packing fractions and their comparison with homogeneous thorium-uranium fuel
title_sort neutronics effect of triso duplex fuel packing fractions and their comparison with homogeneous thorium-uranium fuel
publisher John Wiley and Sons Ltd
publishDate 2023
_version_ 1806424404758888448
score 13.211869

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