NUCLEAR RADIATION DOSIMETER USING STRESS INDUCED BIREFRINGENCE CHANGES IN FIBER OPTIC CABLES
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United States of America Patent
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app pub date -
Mar 14, 2013
filing date -
Mar 14, 2013
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Abandoned
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Abstract
The present invention relates to devices and methods for measuring neutron fluence at a pre-selected location which is positioned in a nuclear power plant. The devices and methods include passing neutrons through a fiber optic cable. The fiber optic cable has disposed therein a neutron sensitive material which is capable of absorbing the neutrons to produce a gas. The gas results in a build-up of pressure in the fiber optic cable which causes a change in the optical stress birefringence pattern. This change is measured and used to determine the amount of gas in the fiber optic cable, the number of neutrons absorbed by the neutron sensitive material and subsequently, the neutron fluence at the pre-selected location.
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