플라스틱 광섬유 센서를 이용한 핵 연료의 열중성자 분포도 측정
Measurements of thermal neutron distribution of nuclear fuel using a plastic fiber-optic sensor
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초록
In this study, plastic optical fiber sensors which can measure thermal neutron dose in a mixed neutron－gamma field are developed and characterized. Using 252Cf and 60Co sources, the scintillators suitable for thermal neutron etection, are tested and the scintillating lights generated from a plastic optical fiber sensor in the Kyoto University Critical Assembly (kuca) core are measured. Also, the distributions of thermal neutron and gamma－ray are measured in a mixed field as a function of the distance from the center of the reactor core at KUCA and the distribution of thermal neutron is obtained using a subtraction method. Sensitivity of the fiber-optic radiation sensor system is about 0.49 V/mW according to power of the KUCA core and its relative error is about 1.2 %.
Abstract
In this study, plastic optical fiber sensors which can measure thermal neutron dose in a mixed neutron－gamma field are developed and characterized. Using 252Cf and 60Co sources, the scintillators suitable for thermal neutron etection, are tested and the scintillating lights generated from a plastic optical fiber sensor in the Kyoto University Critical Assembly (kuca) core are measured. Also, the distributions of thermal neutron and gamma－ray are measured in a mixed field as a function of the distance from the center of the reactor core at KUCA and the distribution of thermal neutron is obtained using a subtraction method. Sensitivity of the fiber-optic radiation sensor system is about 0.49 V/mW according to power of the KUCA core and its relative error is about 1.2 %.
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