Status report on multigroup cross section generation code development for high-fidelity deterministic neutronics simulation system.

Yang, Won Sik; Lee, C. H.

doi:10.2172/1028602

2008

DOI: 10.2172/1028602

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Status report on multigroup cross section generation code development for high-fidelity deterministic neutronics simulation system.

Won Sik Yang¹,

C. H. Lee²

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2021

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Evaluation of PBMR-400 Core Design Steady State Condition with Serpent and AGREE

Ardiansyah

Şeker

Downar

et al. 2021

J. Phys.: Conf. Ser.

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The significant recent advances in computer speed and memory have made possible an increasing fidelity and accuracy in reactor core simulation with minimal increase in the computational burden. This has been important for modeling some of the smaller advanced reactor designs for which simplified approximations such as few groups homogenized diffusion theory are not as accurate as they were for large light water reactor cores. For narrow cylindrical cores with large surface to volume ratios such the Ped Bed Modular Reactor (PBMR), neutron leakage from the core can be significant, particularly with the harder neutron spectrum and longer mean free path than a light water reactor. In this paper the core from the OECD PBMR-400 benchmark was analyzed using multigroup Monte Carlo cross sections in the HTR reactor core simulation code AGREE. Homogenized cross sections were generated for each of the discrete regions of the AGREE model using a full core SERPENT Monte Carlo model. The cross sections were generated for a variety of group structures in AGREE to assess the importance of finer group discretization on the accuracy of the core eigenvalue and flux predictions compared to the SERPENT full core Monte Carlo solution. A significant increase in the accuracy was observed by increasing the number of energy groups, with as much as a 530 pcm improvement in the eigenvalue calculation when increasing the number of energy groups from 2 to 14. Significant improvements were also observed in the AGREE neutron flux distributions compared to the SERPENT full core calculation.

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Evaluation of PBMR-400 Core Design Steady State Condition with Serpent and AGREE

Ardiansyah

Şeker

Downar

et al. 2021

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

show abstract

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Status report on multigroup cross section generation code development for high-fidelity deterministic neutronics simulation system.

Cited by 1 publication

References 12 publications

Evaluation of PBMR-400 Core Design Steady State Condition with Serpent and AGREE

Evaluation of PBMR-400 Core Design Steady State Condition with Serpent and AGREE

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