Development of experimental database and validation of analysis code for dynamic behavior of fuel debris bed

2015 Fiscal Year Final Research Report

• Project/Area Number: 25420909
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Nuclear engineering
• Research Institution: Kyushu University
• Principal Investigator: MORITA Koji 九州大学, 工学(系)研究科(研究院), 教授 (40311849)
• Co-Investigator(Kenkyū-buntansha): MATSUMOTO Tatsuya 九州大学, 大学院工学研究院, 助教 (90325514)
• Co-Investigator(Renkei-kenkyūsha): TOBITA Yoshiharu 日本原子力研究開発機構, 次世代原子力システム研究開発部, 主任研究員 (20421555)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 高速炉 / 炉心損傷事故 / 燃料デブリベッド / セルフ・レベリング / 数値解析 / 個別要素法

Outline of Final Research Achievements

The present study focuses on self-leveling behavior of fuel debris bed, which is critical as a dominant factor in the long-term decay heat removal phase after core disruptive accident of fast reactors. A series of experiments, which improve simulated accident conditions such as debris properties, coolant boiling behaviors and so on, was performed to acquire experimental knowledge on self-leveling characteristics. An experimental database was also developed for validation of physical models used in computational tools. Validation of a numerical simulation code based on the particle-grid hybrid method was examined based on the present experimental results.

Free Research Field

原子炉工学