CN114323476A - Method for arranging tracer gas sampling points in airtight test of habitability area of nuclear power station main control room - Google Patents
Method for arranging tracer gas sampling points in airtight test of habitability area of nuclear power station main control room Download PDFInfo
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- CN114323476A CN114323476A CN202111411425.8A CN202111411425A CN114323476A CN 114323476 A CN114323476 A CN 114323476A CN 202111411425 A CN202111411425 A CN 202111411425A CN 114323476 A CN114323476 A CN 114323476A
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- 238000005070 sampling Methods 0.000 title claims abstract description 54
- 238000012360 testing method Methods 0.000 title claims abstract description 33
- 239000000700 radioactive tracer Substances 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000009423 ventilation Methods 0.000 claims abstract description 8
- 230000008520 organization Effects 0.000 claims abstract description 4
- 230000002159 abnormal effect Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
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Abstract
The invention belongs to the field of testing and evaluating the habitability of an important habitability area of a nuclear facility, and particularly relates to a tracer gas sampling point arrangement method for a nuclear power station main control room habitability area airtight test, which is used for an airtight test of the main control room habitability area through a ventilation system of the nuclear power station main control room habitability area and comprises the following steps: step S1, defining rooms included in a residence area of a main control room of the nuclear power station; step S2, defining the airflow organization form of each room of the habitability area of the main control room; step S3, determining the area of the cross section of the flowing air which is vertical to the airflow direction in each room of the habitability area of the main control room; step S4, calculating the number of sampling points in each room, and determining the positions of the sampling points; and step S5, establishing a tracer gas sampling point arrangement table for the air tightness test of the habitability area of the main control room. The method can specifically calculate and arrange the tracer gas sampling points of the habitability area of the main control room in the air tightness test of the habitability area of the main control room of the nuclear power station.
Description
Technical Field
The invention belongs to the field of testing and evaluating the habitability of an important habitability area of a nuclear facility, and particularly relates to a method for arranging tracer gas sampling points in an airtight test of a habitability area of a main control room of a nuclear power station.
Background
An important habitability area of a nuclear facility refers to an area in the nuclear facility (e.g., a nuclear power plant) where it is necessary to provide a habitability atmosphere (air temperature, humidity, cleanliness, etc. satisfying the habitability requirements) necessary for the watchmen under abnormal conditions (nuclear leakage, biochemical attack, etc.). Under the abnormal state, the staff guard in the important habitability area can delay or stop the development of the abnormal state of the nuclear facility, and alleviate or eliminate the consequences caused by the abnormal state, so the important habitability area has important significance, especially the main control room habitability area of the nuclear power station, and more important key area in the habitability area.
The main control room habitability area refers to an area specified in the reference file taken by the nuclear power plant, and is isolated from the nuclear power plant and the external environment in an accident state. The area is generally comprised of a main control room and a peripheral area. The internal leakage amount refers to the air flow which is not filtered by the ventilation system operated in the habitability area of the main control room and leaks into the habitability area of the main control room under the test working condition. The method for testing the leakage in the habitability area of the main control room is a tracer gas method, namely, a tracer gas method is injected into the habitability area of the main control room in a certain mode, and the leakage in the habitability area of the main control room is calculated according to the concentration change rule of the tracer gas. The method of placing the sampling points of the tracer gas is directly related to the effectiveness of the test.
Disclosure of Invention
The invention aims to provide a tracer gas sampling point arrangement method for a gas tightness test of a habitability area of a main control room, which is used for specifically calculating and arranging tracer gas sampling points of the habitability area of the main control room in the gas tightness test of the habitability area of the main control room.
In order to achieve the above purpose, the technical scheme adopted by the invention is a method for arranging tracer gas sampling points in an airtight test of a habitability area of a main control room of a nuclear power station, which is used for the airtight test of the habitability area of the main control room through a ventilation system of the habitability area of the main control room of the nuclear power station, and comprises the following steps:
step S1, defining rooms included in a residence area of a main control room of the nuclear power station;
step S2, defining the airflow organization form of each room of the habitability area of the main control room;
step S3, determining the area of the cross section of the flowing air which is vertical to the airflow direction in each room of the habitability area of the main control room;
step S4, calculating the number of sampling points of each room, and determining the positions of the sampling points;
and step S5, formulating a trace gas sampling point arrangement table for the gas tightness test of the habitability area of the main control room.
Further, in step S1, the room number and the room name of the room need to be specified.
Further, in the step S2, the airflow pattern includes "side feeding side returning" and "bottom feeding top returning"; an airflow is provided by the ventilation system into the room; the side feeding and side returning means that relative to the room, the airflow flows along the side wall to realize side wall air supply and side wall air returning; the downward-feeding and upward-returning means that the airflow flows from bottom to top relative to the room.
Further, in the step S4, at least one sampling point is set for each room.
Further, in the step S4, a plurality of the rooms to be considered in combination are taken as one area as needed, the minimum number of the sampling points of the area is calculated by the following formula,
N＝A0.5
the N refers to the number of sampling points of the area, and the unit is 'number';
a is the area of the cross section of the air flowing in the area perpendicular to the direction of the air flow, and the unit is m2。
Further, in the step S4, when there are a plurality of the sampling points in the room or the area, the sampling points should be uniformly distributed in the whole area of the room or the area.
Further, in the step S4, the sampling point is located at a level 0.8m from the floor.
The invention has the beneficial effects that: the method can specifically calculate and arrange the tracer gas sampling points of the main control room habitability area in the main control room habitability area gas tightness test of the nuclear power station.
Drawings
Fig. 1 is a flowchart of a method for arranging tracer gas sampling points in a gas tight test of a habitability area of a main control room of a nuclear power plant according to an embodiment of the present invention.
Fig. 2 is a schematic diagram illustrating a residence area of a main control room of a nuclear power plant (including a distribution of sampling points) according to an embodiment of the present invention.
Detailed Description
The invention is further described below with reference to the figures and examples.
The invention provides a method for arranging tracer gas sampling points in an airtight test of a habitability area of a main control room of a nuclear power station, which is used for the airtight test of the habitability area of the main control room through a ventilation system of the habitability area of the main control room of the nuclear power station and comprises the following steps:
step S1, defining rooms included in a residence area of a main control room of the nuclear power station;
step S2, defining the airflow organization form of each room of the habitability area of the main control room;
step S3, determining the area of the cross section of the flowing air which is vertical to the airflow direction in each room of the habitability area of the main control room;
step S4, calculating the number of sampling points in each room (area) and determining the positions of the sampling points;
and step S5, establishing a tracer gas sampling point arrangement table for the air tightness test of the habitability area of the main control room.
In step S1, the room number and the room name of the room need to be clarified.
In step S2, the air flow pattern includes two patterns of "side feeding side returning" and "feeding down and returning up"; the air flow is provided by a ventilation system into the room; the side feeding and side returning means that relative to a room, airflow flows along the side wall to realize side wall air supply and side wall air returning; "downward flow and upward flow" means that the airflow flows from bottom to top relative to the room.
In step S4, at least one sampling point is set for each room.
In step S4, a plurality of rooms to be considered in combination are defined as one area as needed, the minimum number of sampling points of the area is calculated by the following formula,
N＝A0.5
n refers to the number of sampling points in the area, and the unit is 'number';
a is the area of the cross section of the air flowing in the region perpendicular to the direction of the air flow, and is given by m2。
In step S4, when there are multiple sampling points in the room or area, the sampling points should be uniformly distributed in the whole area of the room or area.
In step S4, the sampling point should be located at a level of 0.8m from the floor (height of the working area).
Finally, the specific application of the method for arranging the tracer gas sampling points in the airtight test of the habitability area of the nuclear power station main control room is illustrated.
A main control room habitability area of a certain nuclear power plant as shown in fig. 2;
and step S1, defining rooms included in a main control room habitability area of the nuclear power station, wherein the main control room habitability area comprises a main control room, a computer center, a technical support center, a security office, a study room, a restaurant, a dressing room, a toilet, a corridor, an early meeting room, an isolation office and a long office.
At step S2, the airflow pattern of each room in the habitability area of the master control room is defined, as shown in the following table:
step S3, defining the area of the cross section of the air flowing in each room of the habitability area of the main control room, which is perpendicular to the direction of the air flow, as shown in the following table:
step S4, calculating the number of sampling points of each room (area), and determining the positions of the sampling points, wherein the main control room and the technical support center of the residence area of the main control room of the nuclear power station should be considered separately, and other rooms of the residence area of the main control room are considered as a whole and are divided into three areas;
step S5, a table for arranging tracer gas sampling points in the air tightness test of the habitability area of the main control room is formulated, and the table is as follows:
the device according to the present invention is not limited to the embodiments described in the specific embodiments, and those skilled in the art can derive other embodiments according to the technical solutions of the present invention, and also belong to the technical innovation scope of the present invention.
Claims (7)
1. A tracer gas sampling point arrangement method for a nuclear power station main control room habitability area airtight test is used for the airtight test of the main control room habitability area through a ventilation system of the nuclear power station main control room habitability area, and comprises the following steps:
step S1, defining rooms included in a residence area of a main control room of the nuclear power station;
step S2, defining the airflow organization form of each room of the habitability area of the main control room;
step S3, determining the area of the cross section of the flowing air which is vertical to the airflow direction in each room of the habitability area of the main control room;
step S4, calculating the number of sampling points of each room, and determining the positions of the sampling points;
and step S5, formulating a trace gas sampling point arrangement table for the gas tightness test of the habitability area of the main control room.
2. The method for arranging the tracer gas sampling points in the airtight test of the habitability area of the nuclear power plant main control room as defined in claim 1, wherein: in step S1, the room number and the room name of the room need to be specified.
3. The method for arranging the tracer gas sampling points in the airtight test of the habitability area of the nuclear power plant main control room as defined in claim 2, wherein: in the step S2, the airflow pattern includes "side feeding side returning" and "bottom feeding top returning"; an airflow is provided by the ventilation system into the room; the side feeding and side returning means that relative to the room, the airflow flows along the side wall to realize side wall air supply and side wall air returning; the downward-feeding and upward-returning means that the airflow flows from bottom to top relative to the room.
4. The method for arranging the tracer gas sampling points in the airtight test of the habitability area of the nuclear power plant main control room as defined in claim 3, wherein: in step S4, at least one sampling point is set for each room.
5. The method for arranging the tracer gas sampling points in the airtight test of the habitability area of the nuclear power plant main control room as defined in claim 4, wherein: in step S4, a plurality of rooms to be considered in combination are defined as one area, as required, the minimum number of sampling points of the area is calculated by the following formula,
N＝A0.5
the N refers to the number of sampling points of the area, and the unit is 'number';
a is the area of the cross section of the air flowing in the area perpendicular to the direction of the air flow, and the unit is m2。
6. The method for arranging the tracer gas sampling points in the airtight test of the habitability area of the nuclear power plant main control room as defined in claim 5, wherein: in step S4, when there are a plurality of sampling points in the room or the area, the sampling points should be uniformly distributed in the whole area of the room or the area.
7. The method for arranging the tracer gas sampling points in the airtight test of the habitability area of the nuclear power plant main control room as defined in claim 6, wherein: in the step S4, the sampling point is located at a level 0.8m from the floor.
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