Extension of the ACE file perturbation tool in FRENDY. Implementation of the perturbation method for the elastic scattering angle distribution based on the maximum entropy method
- 1. Japan Atomic Energy Agency, Oarai Research and Development Institute, Fast Reactor Cycle System Research and Development Center, Fast Reactor Life-Cycle Safety and Integrity Evaluation Technology Development Department, Oarai, Ibaraki (Japan)
Description
The Japanese nuclear data processing code FRENDY implements the ACE file perturbation tool based on the random sampling method, which can be used to quantify nuclear data-induced uncertainties. However, it has not been able to evaluate the uncertainty due to the scattering angle distribution, which is not ignored in the uncertainty quantification of fast reactor core analysis and shielding analysis. Recently, a method to quantify the uncertainty based on the maximum entropy method has been proposed by the authors. In this report, a perturbation function for the uncertainty of the elastic scattering angular distribution based on this proposed method has been added to the FRENDY/ACE file perturbation tool. (author)
Availability note (English)
Also available from JAEA; DOI: https://doi.org/10.11484/jaea-data-code-2024-009Abstract (Japanese)
国産の核データ処理コードFRENDY にはランダムサンプリング法に基づくACE ファイル摂動ツールが実装されており、これを利用して核データ起因不確かさを定量化することが可能である。しかしながら、高速炉の炉心解析や遮蔽解析における不確かさ評価で有意となる散乱角度分布起因の不確かさを評価する機能はこれまで開発されていなかった。近年、平均散乱角余弦の共分散データの情報から最大エントロピー法に基づき、この不確かさを定量化する手法が著者らによって提案された。本報告では、この提案手法に基づく弾性散乱角度分布の不確かさに対する摂動機能をFRENDY/ACE ファイル摂動ツールに追加する。(著者)
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Additional details
Additional titles
- Original title (Japanese)
- FRENDY/ACEファイル摂動ツールの機能拡張.最大エントロピー法に基づく弾性散乱角度分布の摂動機能の実装
Identifiers
Publishing Information
- Imprint Title
- Extension of the ACE file perturbation tool in FRENDY. Implementation of the perturbation method for the elastic scattering angle distribution based on the maximum entropy method
- Imprint Pagination
- 24 p.
- Report number
- JAEA-Data/Code--2024-009
INIS
- Country of Publication
- Japan
- Country of Input or Organization
- Japan
- INIS RN
- 56006804
- Subject category
- S73: NUCLEAR PHYSICS AND RADIATION PHYSICS;
- Descriptors DEI
- ACCURACY; ANGULAR DISTRIBUTION; DATA COVARIANCES; ELASTIC SCATTERING; ENTROPY; F CODES; FAST REACTORS; PERTURBATION THEORY; REACTOR CORES
- Descriptors DEC
- COMPUTER CODES; DISTRIBUTION; EPITHERMAL REACTORS; PHYSICAL PROPERTIES; REACTOR COMPONENTS; REACTORS; SCATTERING; THERMODYNAMIC PROPERTIES
Optional Information
- Notes
- 16 refs., 6 figs., 2 tabs.