Self-powered detector

The self-powered detector with multiple emitter units and a failure detection system addresses sensitivity and reliability issues in high-temperature, low dose rate environments by using Al2O3 insulating containers and conductors to maintain electrical connections, ensuring accurate radiation measurement.

JP2025143939APending Publication Date: 2025-10-02HITACHI GE NUCLEAR ENERGY LTD
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Patent Information

Application Number
JP2024043466
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Filing Date
2024-03-19
Publication Date
2025-10-02

AI Technical Summary

Technical Problem

Self-powered detectors face challenges in maintaining high sensitivity for detecting low dose rates of radiation in high-temperature environments with significant neutron flux, such as inside a nuclear reactor, due to limitations in insulating case thickness and the risk of breakage when the emitter is in a molten state.

Method used

A self-powered detector design with multiple emitter units sealed in insulating containers made of Al2O3, each connected electrically in series or parallel, and equipped with conductors to maintain electrical connections and include a failure detection system for sensitivity correction, allowing operation above the melting point of the emitters.

Benefits of technology

Enables high-sensitivity radiation detection in low dose rate environments by reducing the risk of insulating case damage and maintaining electrical connections, ensuring reliable operation and accurate measurement of radiation levels.

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Abstract

To provide a self-powered detector capable of detecting radiation with high sensitivity even in a low dose rate environment.SOLUTION: A self-powered detector 1 includes emitters 111, 112 and 113, a collector 14 disposed outside the emitters 111, 112 and 113, and insulated containers 121, 122 and 123 in which the emitters 111, 112 and 113 are sealed in a space formed inside thereof and which insulates the emitters 111, 112 and 113 from the collector 14, and is used at or above the melting point of the emitters 111, 112 and 113. The self-powered detector includes: two or more emitter units each comprised of the emitters 111, 112 and 113 and the insulated containers 121, 122 and 123; and conductors 131 and 132 that electrically connect the emitters 111, 112 and 113 in the emitter unit.SELECTED DRAWING: Figure 1
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