Nuclear power plant radioactive exudation monitoring system

A monitoring system and radioactive technology, applied in the field of nuclear power plants, can solve the problems of cumbersome maintenance, disadvantageous, complex monitoring system structure, etc., and achieve the effects of reducing fault links, realizing automatic deduction, and increasing gas concentration

Inactive Publication Date: 2016-02-03
CHINA NUCLEAR POWER DESIGN COMPANY +2
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of monitoring system has a complex structure and cumbersome maintenance, which is not conducive to reducing the occupational exposure of maintenance personnel; moreover, it can only monitor the activity concentration of waste liquid, and cannot calculate the total discharge activity; the measurement chamber 11 cannot be emptied naturally, and radioactive pollution is easy to accumulate. The background cannot be automatically deducted during the first emission, which affects the measurement accuracy; false alarms in the non-emission state cannot be avoided

Method used

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  • Nuclear power plant radioactive exudation monitoring system
  • Nuclear power plant radioactive exudation monitoring system
  • Nuclear power plant radioactive exudation monitoring system

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Embodiment Construction

[0047] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described in detail with reference to the accompanying drawings.

[0048] The nuclear power plant radioactive effluent monitoring system of the present invention includes an airborne radioactive effluent monitoring system for monitoring airborne radioactive effluents and a liquid radioactive effluent monitoring system for monitoring liquid radioactive effluents.

[0049] Wherein, the airborne radioactive effluent monitoring system includes a heating unit, which is used to control the part of the sampling pipeline where the aerosol and iodine monitors in the airborne radioactive effluent monitoring system are located outside the chimney The gas in the pipe is heated, and the gas in the pipe is heated in the part of the sampling pipe that is located outside the chimney where the aerosol a...

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Abstract

Provided is a nuclear power plant radioactive exudation monitoring system which comprises an airborne radioactive exudation monitoring system. The airborne radioactive exudation monitoring system comprises a heating unit. The heating unit is used for heating gases in a part, outside a chimney, of a sampling pipeline where an aerosol and iodine monitor in the airborne radioactive exudation monitoring system is located, and a part, outside a chimney, of a sampling pipeline where an aerosol and iodine sampler is located. The nuclear power plant radioactive exudation monitoring system may prevent aerosol and iodine steam condensation caused by a decrease in ambient temperature and may increase aerosol and iodine acquisition efficiency. Further, a compressor is arranged on the upstream of an inert gas sampling bottle so as to increase gas concentration. In a high radioactivity monitoring system, a lead shielding device is arranged outside the inert gas sampling bottle and the aerosol and iodine sampler in order to improve protection of workers against radiation. A liquid radioactive exudation monitoring system is improved, simplified in structure, and decreased in fault links. A flowmeter is provided in order to compute total discharge activity.

Description

technical field [0001] The invention relates to the field of nuclear power plants, in particular to a nuclear power plant radioactive effluent monitoring system. Background technique [0002] Airborne radioactive effluents and liquid radioactive effluents from nuclear power plants have a corresponding annual discharge control limit, where airborne radioactive effluents include aerosols, iodine, inert gases, 14 C. 3 H, Liquid radioactive effluents include 3 H. 14 C and other nuclides. [0003] refer to figure 1 , the gaseous effluent is continuously discharged to the environment through the exhaust chimney of the nuclear island powerhouse. A sampling head 1 is set in the chimney 10 to continuously sample the effluent. The aerosol monitor 2, the iodine monitor 3, and the low-range inert gas monitor 4 are the Continuously monitor the activity concentration of aerosol, iodine, and inert gas under normal operating conditions. The high-range inert gas monitor 5 is used for re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01T1/16
Inventor 孙瑜刘洪涛
Owner CHINA NUCLEAR POWER DESIGN COMPANY
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