Development of neutron resonance absorption thermometry aimed at practical application to industrial usage

2020 Fiscal Year Final Research Report

• Project/Area Number: 17H03515
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Nuclear engineering
• Research Institution: Hokkaido University
• Principal Investigator: Kamiyama Takashi 北海道大学, 工学研究院, 教授 (50233961)
• Co-Investigator(Kenkyū-buntansha): 佐藤 博隆 北海道大学, 工学研究院, 准教授 (30610779)
• Project Period (FY): 2017-04-01 – 2021-03-31
• Keywords: 非破壊・非接触温度測定 / 中性子共鳴吸収 / 中性子イメージング / 小型中性子源 / 熱外中性子

Outline of Final Research Achievements

In this study, we have applied the neutron resonance absorption spectroscopy (N-RAS) to a rotating neutron resonance absorber simulating a working machine, and developed the temperature analysis with a standard curve constructed by the aid of particle transport simulation (N-RAS/PTS method). We found that by the method the temperature of the rotating object can be measured non-destructively, remotely and without contact, with an accuracy of several kelvin from room temperature to 600 K. For N-RAS/PTS measurement does not require any restriction on the neutron beam irradiation field, and synchronization between the accelerator operation and sample rotation. The N-RAS/PTS method can be used to prepare a standard curve in advance as long as the sample structure is known, which allows for efficient use of measurement time.

Free Research Field

中性子工学

Academic Significance and Societal Importance of the Research Achievements

物体内部の温度を非破壊・非接触で測定できる中性子共鳴吸収分光法(N-RAS)について、これまで測定について制限があった運動している物体の温度測定を制限なく可能にする新しい解析法(N-RAS/PTS)を開発した。それにより装置内部で運動している物体の温度を室温から300℃まで数℃の精度で測定することが可能となった。この方法は計算機シミュレーションにより温度の検量線を作成するため、実験は必要な温度の測定で済み、実験時間の大幅な節約を図ることができる。