NON-DESTRUCTIVE INSPECTION METHOD AND DEVICE
First Claim
1. A method of non-destructive inspection of a subject body including an element, comprising the steps of:
- irradiating the subject body with a neutron ray through a first measurement point;
measuring an elapsed time from a first time point when a resonant neutron specific to the element passes through the first measurement point to a second time point when a prompt gamma ray made emitted by the resonant neutron from the subject body is detected at a second measurement point distinct from the first measurement point; and
determining a location of the element in the subject body by the first measurement point, the second measurement point, a relative position toward a surface of the subject body, and the elapsed time.
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Accused Products
Abstract
A method of non-destructive inspection of a subject body including an element is comprised of irradiating the subject body with a neutron ray through a first measurement point and a second measurement point; measuring an elapsed time after a first time point when a resonant neutron specific to the element passes through the first measurement point and before a second time point when a prompt gamma ray made emitted by the resonant neutron from the subject body is detected at the second measurement point; and determining a location of the element in the subject body by the first measurement point, the second measurement point, a relative position toward a surface of the subject body, and the elapsed time.
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Citations
9 Claims
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1. A method of non-destructive inspection of a subject body including an element, comprising the steps of:
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irradiating the subject body with a neutron ray through a first measurement point; measuring an elapsed time from a first time point when a resonant neutron specific to the element passes through the first measurement point to a second time point when a prompt gamma ray made emitted by the resonant neutron from the subject body is detected at a second measurement point distinct from the first measurement point; and determining a location of the element in the subject body by the first measurement point, the second measurement point, a relative position toward a surface of the subject body, and the elapsed time. - View Dependent Claims (2, 3, 4)
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5. A device of non-destructive inspection of a subject body including an element, comprising:
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a neutron ray source having a first measurement point and a second measurement point, the neutron ray source being so positioned as to irradiate the subject body with a neutron ray through the first measurement point; a resonant neutron detector for detecting a first time point when a resonant neutron specific to the element passes through the first measurement point, the resonant neutron detector being disposed at the first measurement point; a gamma ray detector for detecting a prompt gamma ray made emitted by the resonant neutron from the subject body is detected at the second measurement point, the gamma ray detector being disposed at the second measurement point; a measurement device configured to measure an elapsed time from the first time point to the second time point when the prompt gamma ray, the measurement device being electrically connected with the resonant neutron detector and the gamma ray detector; and a controller for calculating a location of the element in the subject body from the first measurement point, the second measurement point, a relative position toward a surface of the subject body, and the elapsed time. - View Dependent Claims (6, 7, 8, 9)
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Specification