Uncertainty estimation of unmeasurable core safety parameters - a new approach using covariance matrix

2014 Fiscal Year Final Research Report

• Project/Area Number: 24561040
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Nuclear engineering
• Research Institution: Nagoya University
• Principal Investigator: YAMAMOTO Akio 名古屋大学, 工学(系)研究科(研究院), 教授 (50362265)
• Co-Investigator(Kenkyū-buntansha): CHIBA Go 北海道大学, 大学院工学研究科, 准教授 (50421524) ; ENDO Tomohiro 名古屋大学, 大学院工学研究科, 助教 (50377876)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 炉心解析 / 不確かさ / 感度係数 / 分散共分散行列 / ランダムサンプリング法 / 断面積調整法 / ブートストラップ法 / バイアス因子法

Outline of Final Research Achievements

In the present study, uncertainty estimation of unmeasurable core neutronics parameters is studied, especially theoretical framework and implementation of numerical methods, and validity of the developed methods is confirmed through verifications. A new approach for the cross section adjustment and the bias factor method is developed based on the random sampling method in order to apply them to actual light water reactors. All goals of the present study are fulfilled and the above achievements are beyond the plan at the beginning of this study.

Free Research Field

原子力工学