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2020 Fiscal Year Final Research Report

Improvement of nuclear densitometry technique for identifying the fuel debris

Research Project

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Project/Area Number 17K07012
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Nuclear engineering
Research InstitutionKyoto University

Principal Investigator

Hori Jun-ichi  京都大学, 複合原子力科学研究所, 准教授 (30362411)

Project Period (FY) 2017-04-01 – 2021-03-31
Keywords核燃料物質 / 非破壊分析 / 共鳴 / Self-indication法 / 中性子イメージング
Outline of Final Research Achievements

We have applied the self-indication method to the non-destructive technique to assay a nuclear fuel material in fuel debris. We carried out the experimental validation for the application of a self-indication method at KURNS-LINAC. The correlation between the change of counting rate and areal density was confirmed. Moreover, it was shown that the estimation of the areal density and the neutron imaging for distinguish the nuclear material using a steady neutron source are feasible.

Free Research Field

核データ

Academic Significance and Societal Importance of the Research Achievements

本研究ではSelf-indication法が核燃料物質の非破壊分析に有効な手段であることを実験と計算の両面から実証することができた。さらに、Self-indication法が特定の核種に感度を持たせることができる特徴を生かし、定常中性子源を用いた中性子イメージングによっても核種識別できる見通しを得たことにより、福島第一原子力発電所の廃止措置における燃料デブリの核燃料物質の適切な計量管理にも生かすことのできる実用性のある分析手法を示すことが出来たため、その社会的意義は大きいと言える。

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Published: 2022-01-27  

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