Sensitivity and Uncertainty Analysis of Nuclear Data to k<sub>eff</sub> in AP1000 Core Physics Calculation

秦凯文; 杨波; 刘义保; 张洁茹; 郝鹏飞

doi:10.16056/j.2096-7705.2022.02.011

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Sensitivity and Uncertainty Analysis of Nuclear Data to k_eff in AP1000 Core Physics Calculation

更新时间：2026-01-19

- Sensitivity and Uncertainty Analysis of Nuclear Data to k_eff in AP1000 Core Physics Calculation
- Issue 2, Pages: 61-67(2022)
- 作者机构：
  
  1. 东华理工大学核科学与工程学院
  2. 东华理工大学核资源与环境国家重点实验室
- 作者简介：
- 基金信息：
- DOI：10.16056/j.2096-7705.2022.02.011
  CLC： TM623;TL329
- Published：2022
- 稿件说明：
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秦凯文, 杨波, 刘义保, et al. Sensitivity and Uncertainty Analysis of Nuclear Data to k_eff in AP1000 Core Physics Calculation[J]. 2022, (2): 61-67.
DOI：

秦凯文, 杨波, 刘义保, et al. Sensitivity and Uncertainty Analysis of Nuclear Data to k_eff in AP1000 Core Physics Calculation[J]. 2022, (2): 61-67. DOI： 10.16056/j.2096-7705.2022.02.011.

摘要

核数据作为反应堆计算的输入参数，其不确定性对堆芯物理计算至关重要。以第 3 代先进压水堆 AP1000首循环零功率堆芯为研究对象，采用 SCALE6.1 程序建立堆芯物理模型，分别计算了反应堆冷态和热态工况下，5种典型硼浓度的堆芯有效增殖因子 k

eff

，并与 AP1000 设计文件基准值进行比对，误差在 50 pcm 以内，验证了模型准确性。随后开展核数据对 k

eff

的敏感性和不确定性分析，结果表明，低能区中

235

U 的平均裂变中子产额、

B 的(n

α) 反应截面、共振区中

H 的弹性散射截面、快中子区中

238

U 的裂变截面具有较大的敏感性与不确定性，在反应堆物理计算工程中应重点关注。

Abstract

Nuclear data is used as the input parameter of reactor calculation

and its uncertainty is very important to the calculation of core physics. This paper takes first-cycle zero-power reactor core of the third-generation advanced pressurized water reactor AP1000 as the research object

and uses the SCALE6.1 program to establish the core physical model. Under the cold and hot conditions

the core effective multiplication factor k

eff

of five typical boron concentrations was calculated separately. The calculation result is compared with the benchmark value of AP1000 design file

and

the error is within 50pcm

which verifies the accuracy of the model. Subsequently

the sensitivity and uncertainty analysis of nuclear data to k

eff

was carried out. The results showed that the average fission neutron yield of

235

U and the （n

α） reaction cross section of

B in the low energy region

the elastic scattering cross section of~1H in the resonance energy region

and the fission cross section of

238

U in fast neutron region has greater sensitivity and uncertainty. They should be focused on in the future reactor physical calculation engineering.

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Keywords

references

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Sensitivity and Uncertainty Analysis of Nuclear Data to keff in AP1000 Core Physics Calculation

DOI：10.16056/j.2096-7705.2022.02.011

摘要

Abstract

关键词

Keywords

references

Sensitivity and Uncertainty Analysis of Nuclear Data to k_eff in AP1000 Core Physics Calculation