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A method for estimating the optimal fresh air volume of emergency facilities in nuclear power plants

A technology for fresh air volume and nuclear power plants, which is applied in the field of estimation of the best fresh air volume for emergency facilities of nuclear power plants, and can solve problems such as the lack of habitability requirements, and achieve the effect of design optimization

Active Publication Date: 2019-03-08
CHINA NUCLEAR POWER ENG CO LTD
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Problems solved by technology

[0004] The current design requires that the fresh air volume of emergency facilities under accident conditions should ensure that the inhabitable area maintains a slight positive pressure of at least 30Pa, and it does not propose how to determine the optimal fresh air volume under the premise of ensuring the habitability of staff

Method used

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  • A method for estimating the optimal fresh air volume of emergency facilities in nuclear power plants
  • A method for estimating the optimal fresh air volume of emergency facilities in nuclear power plants
  • A method for estimating the optimal fresh air volume of emergency facilities in nuclear power plants

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Embodiment Construction

[0057] The specific implementation manners of the present invention will be further described below in conjunction with the accompanying drawings.

[0058] The exemplary method for estimating the optimal fresh air volume of emergency facilities in nuclear power plants of the present invention is as follows: figure 1 As shown, the fresh air volume introduced into the habitable area and the resulting changes in non-filtered leakage and exhaust air volume are considered. The procedure for this estimation method is as follows figure 2 shown, including the following steps.

[0059] (1) Determine the non-filter leakage Q u

[0060] Determine the non-filtered leakage Q caused by factors such as gaps in ventilation pipes, cables, doors and windows and other facilities through dynamic measurement or simulation u 1(t), determine the amount of non-filtered leakage Q caused by personnel opening and closing the door, etc. u 2(t), so as to determine the non-filtered leakage Q u =Q u...

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Abstract

The invention belongs to the technical field of nuclear power plant design and relates to a method for estimating the optimal fresh air volume of emergency facilities in nuclear power plants. The estimation method comprises the following steps of (1) determining the non-filtration leakage quantity Qu by dynamic measurement or simulation; (2) determining the radionuclide composition ratio fr; (3) bonding the factors comprising a non-filtration leakage quantity Qu, radionuclide fraction fr, the filtration efficiency f of filtration device and the facility parameter V of habitable area to analyzethe serious accident sequence, evaluating the radioactive concentration of pollutants in the emergency facility, calculating the total effective dose to indoor personnel at different times, and thendetermining the best fresh air volume Qf of the emergency facility. By using the estimation method of the invention, a new, more optimized and reasonable estimation method of the optimal fresh air volume of the emergency facilities can be provided on the basis of considering the actual non-filtration leakage volume under the accident conditions.

Description

technical field [0001] The invention belongs to the technical field of nuclear power plant design, and relates to a method for estimating the optimal fresh air volume of emergency facilities in nuclear power plants. Background technique [0002] In order to improve the ability to deal with severe accidents and improve its safety, nuclear power plants must ensure the habitability and availability of the habitable areas of emergency facilities under severe accident conditions, and ensure the radiation safety of emergency workers. [0003] A fixed non-filtered seepage quantity (Q u =17m 3 / h), and the increase of fresh air volume under accident conditions is conducive to maintaining the positive pressure at the boundary of the habitable area of ​​emergency facilities, preventing external polluted air from directly infiltrating into the habitable area without filtering, that is, reducing the amount of non-filtered leakage, but this is also More polluted air will inevitably be ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/06G06F17/13G06Q50/06G06Q50/26
CPCG06F17/13G06Q10/0639G06Q50/06G06Q50/265
Inventor 刘新建王梦溪吴楠薛娜邱林刘蕴闫瑾蔺洪涛黄树明
Owner CHINA NUCLEAR POWER ENG CO LTD
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