Non-destructive inspection method and device
First Claim
1. A method of non-destructive inspection of a subject body including one or more elements, comprising the steps of:
- irradiating the subject body with a neutron ray along an axis line passing through a reference point;
synchronously detecting gamma rays from directions inclined at equal angles to the axis line at a plurality of measurement points disposed to have equivalent intervals radially from the axis line, respectively;
measuring the detected gamma rays in a plurality of energy ranges;
determining whether measured values in the respective energy ranges are beyond thresholds;
determining energy ranges where all the measured values are beyond the thresholds;
analyzing a type of an element from the determined energy ranges; and
detecting a location of the analyzed type of the element in the subject body on the basis of the reference point, the respective measurement points, a relative position relative to a surface of the subject body, and the directions.
1 Assignment
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Accused Products
Abstract
A method of non-destructive inspection of a subject body including one or more elements comprises irradiating the subject body with a neutron ray along an axis line passing through a reference point; synchronously detecting gamma rays from directions inclined at equal angles to the axis line at a plurality of measurement points disposed to have equivalent intervals radially from the axis line, respectively; measuring the detected gamma rays in a plurality of energy ranges; determining whether measured values in the respective energy ranges are beyond thresholds; determining energy ranges where all the measured values are beyond the thresholds; analyzing a type of an element from the determined energy ranges; and detecting a location of the analyzed type of the element in the subject body on the basis of the reference point, the respective measurement points, a relative position relative to a surface of the subject body, and the directions.
12 Citations
6 Claims
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1. A method of non-destructive inspection of a subject body including one or more elements, comprising the steps of:
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irradiating the subject body with a neutron ray along an axis line passing through a reference point; synchronously detecting gamma rays from directions inclined at equal angles to the axis line at a plurality of measurement points disposed to have equivalent intervals radially from the axis line, respectively; measuring the detected gamma rays in a plurality of energy ranges; determining whether measured values in the respective energy ranges are beyond thresholds; determining energy ranges where all the measured values are beyond the thresholds; analyzing a type of an element from the determined energy ranges; and detecting a location of the analyzed type of the element in the subject body on the basis of the reference point, the respective measurement points, a relative position relative to a surface of the subject body, and the directions. - View Dependent Claims (2, 3)
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4. A device of non-destructive inspection of a subject body including one or more elements, comprising:
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a neutron ray source having a reference point and disposed so as to irradiate the neutron ray along an axis line passing through the reference point; a plurality of gamma ray monitors configured to respectively detect gamma rays from directions inclined at equal angles to the axis line, the gamma ray monitors being disposed at a plurality of measurement points having equivalent intervals radially from the axis line; a plurality of wave height analyzers configured to respectively measure the detected gamma rays in a plurality of energy ranges respectively, the wave height analyzers being respectively electrically connected with the gamma ray monitors; a controller configured to determine whether measured values in each energy ranges are beyond thresholds or not, determine an energy range where all of the measured values are beyond the thresholds, analyze a type of an element from the determined energy range, and detect a location of the analyzed type of the element in the subject body on the basis of the reference point, the respective measurement points, a relative position relative to a surface of the subject body, and the directions. - View Dependent Claims (5, 6)
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Specification