Correction of Negative Angular Distributions in Multigroup Nuclear Data

Hu Zehua

doi:10.13832/j.jnpe.2018.S2.0025

Volume 39 Issue S2

Dec. 2018

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Hu Zehua. Correction of Negative Angular Distributions in Multigroup Nuclear Data[J]. Nuclear Power Engineering, 2018, 39(S2): 25-28. doi: 10.13832/j.jnpe.2018.S2.0025

Citation:

Hu Zehua. Correction of Negative Angular Distributions in Multigroup Nuclear Data[J]. Nuclear Power Engineering, 2018, 39(S2): 25-28. doi: 10.13832/j.jnpe.2018.S2.0025

Hu Zehua. Correction of Negative Angular Distributions in Multigroup Nuclear Data[J]. Nuclear Power Engineering, 2018, 39(S2): 25-28. doi: 10.13832/j.jnpe.2018.S2.0025

Citation:

Hu Zehua. Correction of Negative Angular Distributions in Multigroup Nuclear Data[J]. Nuclear Power Engineering, 2018, 39(S2): 25-28. doi: 10.13832/j.jnpe.2018.S2.0025

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Correction of Negative Angular Distributions in Multigroup Nuclear Data

doi: 10.13832/j.jnpe.2018.S2.0025

Hu Zehua

Institute of Applied Physics and Computational Mathematics, Beijing, 100094, China

Received Date: 2018-08-14
Rev Recd Date: 2018-10-26

Available Online: 2025-02-09

Abstract

Abstract

The angular distribution of the secondary neutron is typically represented as a truncated Legendre series expansion. Limited terms of the expansions may result in some non-physical negative regions for highly anisotropic scattering. The positive representation of the scattering angular distribution is produced by the maximum entropy method from the truncated Legendre series. The positive angular distributions are convert to multigroup nuclear data in ACE format available for MCNP. The reliability of the maximum entropy method for correcting the angular distribution is checked by the calculations of criticality benchmark experiment.
- Angular distribution of the secondary neutron,
- Maximum entropy method,
- Legendre expansion,
- Multigroup nuclear data