Treatments of Thermal Neutron Scattering Data and Their Effect on Neutronics Calculations

Tiejun Zu; Yongqiang Tang; Zhanpeng Huang; Shuai Qin; Jie Li; Qingming He; Liangzhi Cao; Hongchun Wu

doi:10.3389/fenrg.2021.779261

Treatments of Thermal Neutron Scattering Data and Their Effect on Neutronics Calculations

Tiejun Zu
, Yongqiang Tang
, Zhanpeng Huang
, Shuai Qin
, Jie Li
, Qingming He
, Liangzhi Cao
, Hongchun Wu

School of Energy and Power Engineering

Xi'an Jiaotong University

Research output: Contribution to journal › Article › peer-review

8 Scopus citations

Abstract

In the conventional method to generate thermal scattering cross section of moderator materials, only one of the coherent elastic scattering and incoherent elastic scattering is considered in neutronics calculations. For the inelastic scattering, fixed incident energy grid is used in the nuclear data processing codes. The multipoint linearization method is used to refine the incident energy grid for inelastic scattering. We select ZrH_x (zirconium hydride) as an example to analyze the effects of the above described treatments on the reactivity of several critical benchmarks. The numerical results show that the incident energy grid has an obvious effect on the effective multiplication factor (k_eff) of the analyzed reactors; simultaneously considering the coherent and incoherent elastic scattering also affects k_eff by tens of pcm.

Original language	English
Article number	779261
Journal	Frontiers in Energy Research
Volume	9
DOIs	https://doi.org/10.3389/fenrg.2021.779261
State	Published - 8 Dec 2021

Keywords

NECP-Atlas
inelastic scattering
mixed elastic scattering
nuclear data processing
thermal scattering cross section

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.3389/fenrg.2021.779261

Cite this

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title = "Treatments of Thermal Neutron Scattering Data and Their Effect on Neutronics Calculations",

abstract = "In the conventional method to generate thermal scattering cross section of moderator materials, only one of the coherent elastic scattering and incoherent elastic scattering is considered in neutronics calculations. For the inelastic scattering, fixed incident energy grid is used in the nuclear data processing codes. The multipoint linearization method is used to refine the incident energy grid for inelastic scattering. We select ZrHx (zirconium hydride) as an example to analyze the effects of the above described treatments on the reactivity of several critical benchmarks. The numerical results show that the incident energy grid has an obvious effect on the effective multiplication factor (keff) of the analyzed reactors; simultaneously considering the coherent and incoherent elastic scattering also affects keff by tens of pcm.",

keywords = "NECP-Atlas, inelastic scattering, mixed elastic scattering, nuclear data processing, thermal scattering cross section",

author = "Tiejun Zu and Yongqiang Tang and Zhanpeng Huang and Shuai Qin and Jie Li and Qingming He and Liangzhi Cao and Hongchun Wu",

note = "Publisher Copyright: Copyright {\textcopyright} 2021 Zu, Tang, Huang, Qin, Li, He, Cao and Wu.",

year = "2021",

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doi = "10.3389/fenrg.2021.779261",

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journal = "Frontiers in Energy Research",

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TY - JOUR

T1 - Treatments of Thermal Neutron Scattering Data and Their Effect on Neutronics Calculations

AU - Zu, Tiejun

AU - Tang, Yongqiang

AU - Huang, Zhanpeng

AU - Qin, Shuai

AU - Li, Jie

AU - He, Qingming

AU - Cao, Liangzhi

AU - Wu, Hongchun

PY - 2021/12/8

Y1 - 2021/12/8

N2 - In the conventional method to generate thermal scattering cross section of moderator materials, only one of the coherent elastic scattering and incoherent elastic scattering is considered in neutronics calculations. For the inelastic scattering, fixed incident energy grid is used in the nuclear data processing codes. The multipoint linearization method is used to refine the incident energy grid for inelastic scattering. We select ZrHx (zirconium hydride) as an example to analyze the effects of the above described treatments on the reactivity of several critical benchmarks. The numerical results show that the incident energy grid has an obvious effect on the effective multiplication factor (keff) of the analyzed reactors; simultaneously considering the coherent and incoherent elastic scattering also affects keff by tens of pcm.

AB - In the conventional method to generate thermal scattering cross section of moderator materials, only one of the coherent elastic scattering and incoherent elastic scattering is considered in neutronics calculations. For the inelastic scattering, fixed incident energy grid is used in the nuclear data processing codes. The multipoint linearization method is used to refine the incident energy grid for inelastic scattering. We select ZrHx (zirconium hydride) as an example to analyze the effects of the above described treatments on the reactivity of several critical benchmarks. The numerical results show that the incident energy grid has an obvious effect on the effective multiplication factor (keff) of the analyzed reactors; simultaneously considering the coherent and incoherent elastic scattering also affects keff by tens of pcm.

KW - NECP-Atlas

KW - inelastic scattering

KW - mixed elastic scattering

KW - nuclear data processing

KW - thermal scattering cross section

UR - https://www.scopus.com/pages/publications/85121643396

U2 - 10.3389/fenrg.2021.779261

DO - 10.3389/fenrg.2021.779261

M3 - 文章

AN - SCOPUS:85121643396

SN - 2296-598X

VL - 9

JO - Frontiers in Energy Research

JF - Frontiers in Energy Research

M1 - 779261

ER -

Treatments of Thermal Neutron Scattering Data and Their Effect on Neutronics Calculations

Abstract

Keywords

UN SDGs

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