Core analysis of spectral shift operated SmAHTR

Mehta, Vedant; Kotlyar, Dan

doi:10.1016/j.anucene.2018.09.013

Cited by 6 publications

(2 citation statements)

References 14 publications

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“…Results show that the average discharge burnup was improved by 5% and uranium weight was saved by 6∼7%. Recently, the spectral-shift control design was applied in other advanced reactors, such as SmAHTR (Greene, 2010;Ilas et al, 2014;Kotlyar et al, 2017;Mehta and Kotlyar, 2019), small modular reactors (Lindley and Parks, 2016), and molten salt reactors (Betzler et al, 2018). SmAHTR is a small advanced high-temperature graphite-moderator reactor designed by Oak-Ridge.…”

Section: Introductionmentioning

confidence: 99%

“…SmAHTR is a small advanced high-temperature graphite-moderator reactor designed by Oak-Ridge. The cycle length can be extended by up to 20% or coated particle (TRISO) fuel can be reduced by 15% while maintaining the cycle length with the spectral-shift effect (Kotlyar et al, 2017;Mehta and Kotlyar, 2019). In these new-type advanced reactor analyses, a reactor design with spectral-shift effect shows good improvements of the fuel utilization rate and cycle length extension.…”

Section: Introductionmentioning

confidence: 99%

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Application of the Spectral-Shift Effect in the Small Lead-Based Reactor SLBR-50

et al. 2021

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In the design of a nuclear reactor, improving fuel utilization and extending burnup are two of the most important goals. A concept design of spectral-shift control rods is presented to extend cycle length and fuel utilization. First, a small lead-based reactor, SLBR-50, is preliminarily designed, and the design rationality is proved. Next, the concept design of spectral-shift control rods is presented and analyzed. Finally, numerical results of the small reactor design show that the burnup depth is extended by 73.3% and the fuel utilization rate for 235U and 238U is improved by 66.6 and 68.4%. All results are calculated using a Monte-Carlo code RMC. These results show advantages of the concept design for the spectral-shift control rod.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Application of the Spectral-Shift Effect in the Small Lead-Based Reactor SLBR-50

et al. 2021

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Neutronic characteristics of the VVER-1000 fuel assembly with mechanical spectral shift regulation

Elzayat,

Chertkov,

Ashraf

2024

Nuclear Engineering and Design

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Evaluation of uncertainty in antineutrino spectra normalization calculations for advanced nuclear reactor monitoring

Dunbrack,

Erickson

2023

Journal of Applied Physics

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Antineutrino detection systems have been envisioned as an important aspect of safeguarding the next generation of nuclear reactors, especially considering designs utilizing exotic fuel cycles. Deployment of antineutrino detection systems for safeguarding applications is hindered by the uncertainties associated with the calculations required for antineutrino spectra measurements and predictions. The focus of this work is to assess the impact of system components on antineutrino spectra normalization uncertainties and their significance in reactor power monitoring sensitivity. The dominant limitation in antineutrino detection calculations is typically the uncertainty associated with a cosmogenic background. This limitation becomes more pronounced when signals are weak, although the issue is mitigated in larger reactors due to their stronger source strength. Additionally, antineutrino emission uncertainties vary with the isotopic composition of the reactor fuel. Unconventional fuel cycles, featuring less common fissioning isotopes, such as Pu-240, introduce larger antineutrino yield uncertainties. The findings from this study suggest that future research on safeguard-targeted antineutrino detection should prioritize background mitigation, particularly when background simulation is necessary. Advanced nuclear reactor designs have a major influence on background understanding and successful system implementation.

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Core analysis of spectral shift operated SmAHTR

Cited by 6 publications

References 14 publications

Application of the Spectral-Shift Effect in the Small Lead-Based Reactor SLBR-50

Application of the Spectral-Shift Effect in the Small Lead-Based Reactor SLBR-50

Neutronic characteristics of the VVER-1000 fuel assembly with mechanical spectral shift regulation

Evaluation of uncertainty in antineutrino spectra normalization calculations for advanced nuclear reactor monitoring

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