Long-lifespan in-core instrument

A measuring instrument, long-life technology, applied in measuring devices, radiation measurement, neutron radiation measurement, etc., can solve problems such as difficulty in ensuring high-level waste storage space, increase in replacement costs, and increase in operating burden on nuclear power plants. effect of space, increased lifespan, reduced radiation exposure

Inactive Publication Date: 2017-08-29
KOREA HYDRO & NUCLEAR POWER CO LTD
View PDF6 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] Rhodium, which is commonly used as the emitter material for in-core gauges, burns rapidly, and in-core gauges have a lifetime of about two to three cycles (up to six years), due to the increased replacement costs of in-core gauges and the difficulty in securing high-grade waste storage space, thereby increasing the operational burden on nuclear power plants

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Long-lifespan in-core instrument
  • Long-lifespan in-core instrument
  • Long-lifespan in-core instrument

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] The terms used in the specification and claims should not be interpreted as being limited to ordinary or dictionary meanings, but will be interpreted as meanings in the context of the technical idea of ​​the present disclosure based on the principle that the inventor can properly define the terms concept to best describe the disclosure. Therefore, configurations shown in the drawings and embodiments described herein are merely exemplary embodiments of the present disclosure to limit the technical idea of ​​the present invention, and it should be understood that there are various equivalents and modifications that may be substituted therefor.

[0026] Hereinafter, a long-life core gauge according to the present invention will be described with reference to the accompanying drawings.

[0027] image 3 is a sectional view showing a core instrumentation assembly according to an embodiment of the present invention.

[0028] refer to image 3 , the long-lived core instrume...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

A long-lifespan in-core instrument having an extended lifespan due to an enhanced combustion lifespan of an emitter according to the present invention comprises: a central tube; an outer sheath tube distanced from the outer circumferential surface of the central tube; self-powered neutron detectors placed between the central tube and outer sheath tube, and each comprising an emitter of a material having a reaction cross section with neutron that is comparatively smaller than that of rhodium; a background detector for compensating for the background noise signal; core exit thermocouples for detecting the core exit temperature; and filler wires filling in the space between the self-powered neutron detectors, background detector and core exit thermocouples, and as such, the present invention can markedly reduce the amount of spent in-core instrument waste, which is high-level radioactive material, and thus can contribute in securing a utility space for the high-level waste material, as well as in reducing radiation exposure of the nuclear power plant personnel.

Description

technical field [0001] The present invention relates to a long-life core gauge, and more particularly to a long-life core gauge for measuring the power distribution of a reactor core important to the safe operation of a nuclear power plant. Background technique [0002] The most important indicator for the safe operation of nuclear reactors is the power crest factor (Fq), which requires continuous and accurate measurement of the three-dimensional power distribution of the reactor core to monitor the value of the power crest factor. The power distribution of the reactor core is measured using core gauges, and in nuclear power plants both mobile core gauges and stationary core gauges are used. [0003] Mobile core gauges, mainly using the fission chamber, are available during the lifetime of the nuclear power plant and are able to accurately measure the three-dimensional power distribution of the reactor core: however, the power distribution is only measured periodically, so t...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): G21C17/108G01T3/00
CPCG21C17/108Y02E30/30G21C17/112G01T3/006G01T3/00G21C17/08G21C17/104G21C17/116
Inventor 车均皓金容德卢璟琥金湧培
Owner KOREA HYDRO & NUCLEAR POWER CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap