CN104715561B - The infrared emission fire detecting system in Spent Fuel Pool room and its installation method - Google Patents

Abstract

The invention discloses an infrared cross-radiation fire detection system for a spent fuel pool room and an installation method thereof. The installation method includes the following steps: dividing a first area for setting a spent fuel pool in the spent fuel pool room and connecting with the first The second area connected to the area; use at least one infrared through-beam fire detector to form an infrared through-beam fire detection system; install the infrared through-beam fire detector in the second area so that the infrared through-beam fire detector is located above the driving, and The distance between the infrared through-beam fire detector and the obstacle above it is M, and the range of M is at least 0.3 meters; the distance between the infrared through-beam fire detector adjacent to the first side wall and the first side wall is N , where N ranges from 0.5 meters to 7 meters. The system includes at least one infrared through-beam fire detector. The beneficial effect is that the installation is convenient, and foreign objects can be prevented from falling into the spent fuel pool during installation.

Description

Infrared beam fire detection system and installation method for spent fuel pool room

technical field

The present invention relates to a fire detection system, more specifically, to an infrared through-beam fire detection system in a spent fuel pool room and an installation method thereof.

Background technique

The spent fuel pool is a site for storing and cooling spent fuel assemblies and damaged fuel assemblies, as well as conducting underwater operations such as inspection, repair, and transportation of fuel assemblies, while the spent fuel pool room is a room for built-in spent fuel pools.

The spent fuel pool room is generally a relatively tall room, for example, the spent fuel pool room is a cuboid room of 30m×16m×10m (length×width×height). At the same time, in order to cooperate with the operation of the spent fuel pool and corresponding operations, the room of the spent fuel pool is also equipped with many cables, cabinets and driving equipment.

Due to unforeseen fire hazards (such as short circuit) in cables, cabinets or other equipment, once a fire occurs, it will bring great safety hazards to the safe operation of spent fuel pools and even nuclear power plants. Real-time and effective detection of the fire situation in the pool room.

The spent fuel pool room generally includes a first side wall, a second side wall, a third side wall, a fourth side wall and a roof, the first side wall and the third side wall are opposite to each other, and the second side wall and the fourth side wall The walls are opposite to each other, the first side wall, the second side wall, the third side wall and the fourth side wall are connected end to end in sequence, and the roof is set on the first side wall, the second side wall, the third side wall and the fourth side wall. A number of beams are fixed above the side walls and below the roof, and the beams are parallel to the first side wall; the roof, the second side wall, the third side wall and the fourth side wall form the first area, and the first area It is used to set up the spent fuel pool. The roof, the first side wall, the second side wall and the fourth side wall are enclosed to form a second area. There is a vehicle in the second area, and the running track of the vehicle is parallel to the first side wall.

In the prior art, an installation method of an infrared cross-radiation fire detection system in a spent fuel pool room is as follows: the transceiver is installed on the first side wall, and the reflector is installed on the corresponding position of the third side wall, that is, the transceiver The infrared beam between the transmitter and the reflector passes directly above the spent fuel pool; at the same time, the installation height of the transceiver and the reflector is about 6 meters from the ground. However, the above-mentioned installation method has the following defects: the installation position is low, and the fuel operation long rod tool will block the infrared beam between the transceiver and the reflector every time the fuel operation is performed, resulting in false fire alarms; since the spent fuel pool is close to the third The side wall, while the transceiver or reflector is also installed on the third side wall, which causes the transceiver or reflector to be too close to the side of the spent fuel pool and higher from the ground, and foreign objects may also fall into the spent fuel pool during maintenance and scaffolding risks of.

In the prior art, fire detection devices such as temperature detectors, smoke detectors, infrared flame detectors or smoke detectors can also be installed in the room, but the response speed of the temperature detector is slow, the detection is not sensitive, and the smoke detector The detector is a fire detection device that is not recommended to be installed in a tall room according to the national standard of our country. The infrared flame detector will only alarm when a flame is generated in the house, and there is no way to detect the smoke generated in the early stage of the flame; Non-fire smoke will also be produced during normal operation. Such smoke will cause the detection error of the smoke detector.

To sum up, the fire detection device used in the spent fuel pool room and its installation method in the prior art have the following defects: there is a risk of foreign matter falling into the spent fuel pool during installation, the fire detection is not sensitive, and there are problems of false fire alarms.

Contents of the invention

The technical problem to be solved by the present invention is to provide an infrared sensor for the room of the spent fuel pool that can prevent foreign objects from falling into the spent fuel pool during installation, is sensitive to fire detection, and can effectively solve the problem of false fire alarms. Radiation fire detection system and method of installation thereof.

The technical solution adopted by the present invention to solve the technical problem is to construct an installation method of an infrared cross-radiation fire detection system in a room of a spent fuel pool, and the installation method includes the following steps:

In the room of the spent fuel pool, a first area 2 for setting the spent fuel pool 1 and a second area 3 communicating with the first area 2 are divided, and the driving 4 and the first side are arranged in the second area 3 wall 5;

Use at least one infrared through-beam fire detector 6 to form the infrared through-beam fire detection system, wherein each of the infrared through-beam fire detectors 6 includes a transceiver 7 and a reflector 8;

The infrared through-radiation fire detector 6 is installed in the second area 3, so that the infrared through-radiation fire detector 6 is located above the vehicle 4, and the infrared through-radiation fire detector 6 and its upper The distance of the obstacle is M, wherein the range of M is at least 0.3 meters, and at the same time, the transceiver 7 and the reflector 8 in each infrared fire detector 6 are arranged at the same height;

The infrared through-beam fire detector 6 adjacent to the first side wall 5 is installed at a distance N from the first side wall 5, wherein the range of N is between 0.5 meters and 7 meters .

In the installation method of the infrared through-beam fire detection system in the spent fuel pool room of the present invention, when installing a plurality of said infrared through-beam fire detectors 6, the two adjacent infrared through-beam fire detectors 6 The distance is L, where the range of L is within 15 meters.

In the installation method of the infrared cross-beam fire detection system in the room of the spent fuel pool according to the present invention, the following steps are also included:

The second side wall 9, the third side wall 10, the fourth side wall 11 and the roof 12 are arranged in the room of the spent fuel pool, and the first side wall 5 and the third side wall 10 are oppositely arranged, The second side wall 9 and the fourth side wall 11 are opposite to each other, the first side wall 5, the second side wall 9, the third side wall 10 and the fourth side wall 11 In sequence, the roof 12 is arranged above the first side wall 5, the second side wall 9, the third side wall 10 and the fourth side wall 11, and the roof 12 below are also fixed with a number of beams 13, the beams 13 parallel to the first side wall 5; the roof 12, the second side wall 9, the third side wall 10 and the fourth side wall The side wall 11 encloses the first area 2, and the roof 12, the first side wall 5, the second side wall 9 and the fourth side wall 11 enclose the second area. 3.

In the installation method of the infrared cross-beam fire detection system in the room of the spent fuel pool according to the present invention, the following steps are also included:

The beam 13 is used as the obstacle above the infrared fire detector 6, the transceiver 7 is fixed on the second side wall 9, and the reflector 8 is fixed on the second side wall 9. on the fourth side wall 11;

Or, the transceiver 7 is fixed on the fourth side wall 11, and the reflector 8 is fixed on the second side wall 9; the bottom of the beam 13 is far from the transceiver 7 The vertical distance is M, where the extent of M is at least 0.3 meters.

In the installation method of the infrared cross-beam fire detection system in the room of the spent fuel pool according to the present invention, the following steps are also included:

The roof 12 is used as the obstacle above the infrared fire detector 6, the transceiver 7 and the reflector 8 are fixed on the side of the beam 13, the room The vertical distance from the bottom of the top 12 to the transceiver 7 is M, wherein the range of M is at least 0.3 meters.

In the installation method of the infrared cross-beam fire detection system in the room of the spent fuel pool according to the present invention, the following steps are also included:

The roof 12 is used as the obstacle above the infrared fire detector 6, the transceiver 7 is fixed on the side of the beam 13, and the reflector 8 is fixed on the side of the beam 13. On the fourth side wall 11, or, the reflector 8 is fixed on the second side wall 9; the vertical distance from the bottom of the roof 12 to the transceiver 7 is M, where M The range is at least 0.3 meters.

In the installation method of the infrared cross-beam fire detection system in the room of the spent fuel pool according to the present invention, the following steps are also included:

The roof 12 is used as the obstacle above the infrared fire detector 6, the reflector 8 is fixed on the side of the beam 13, and the transceiver 7 is fixed on the side of the beam 13. On the fourth side wall 11, or, the transceiver 7 is fixed on the second side wall 9; the vertical distance from the bottom of the roof 12 to the transceiver 7 is M, where M The range is at least 0.3 meters.

In the installation method of the infrared cross-beam fire detection system in the room of the spent fuel pool according to the present invention, the range of M is between 0.3m and 1m.

The technical solution adopted by the present invention to solve the technical problem is: to construct an infrared through-beam fire detection system in the room of the spent fuel pool, the infrared through-beam fire detection system includes at least one infrared through-beam fire detector 6, each The infrared through-beam fire detector 6 includes a transceiver 7 and a reflector 8;

In the room of the spent fuel pool, a first area 2 for setting the spent fuel pool 1 and a second area 3 communicating with the first area 2 are divided, and the driving 4 and the first side are arranged in the second area 3 wall 5;

The infrared through-ray fire detector 6 is installed in the second area 3, so that the infrared through-ray fire detector 6 is located above the driving 4, and the infrared through-ray fire detector 6 and the obstacles above it The distance of the object is M, wherein the range of M is at least 0.3 meters, and at the same time, the transceiver 7 and the reflector 8 in each of the infrared through-ray fire detectors 6 are arranged at the same height;

The infrared through-beam fire detector 6 adjacent to the first side wall 5 is installed at a distance N from the first side wall 5, wherein N ranges from 0.5 meters to 7 meters.

In the infrared through-beam fire detection system of the spent fuel pool room according to the present invention, the infrared through-beam fire detection system further includes a power supply unit for supplying power to the transceiver 7 and the reflector 8; The infrared through-beam fire detection system also includes fasteners for installing the transceiver 7 and the reflector 8 .

The infrared cross-beam fire detection system and its installation method in the spent fuel pool room of the present invention have the following beneficial effects: the risk of foreign matter falling into the spent fuel pool from the installation position of the infrared cross-beam fire detection system can be avoided. The infrared through-beam fire detection system is convenient, convenient for construction and later maintenance, sensitive to fire detection, and can effectively avoid the problem of false fire alarms.

Description of drawings

The present invention will be further described below in conjunction with accompanying drawing and embodiment, in the accompanying drawing:

Fig. 1 is a structural schematic diagram of the first embodiment of the installation method of the infrared through-beam fire detection system in the spent fuel pool room of the present invention;

Fig. 2 is a side view of the first embodiment of the installation method of the infrared cross-beam fire detection system in the spent fuel pool room of the present invention;

Fig. 3 is a structural schematic diagram of the second embodiment of the installation method of the infrared through-beam fire detection system in the spent fuel pool room of the present invention;

In the picture:

1- Spent fuel pool, 2- First area, 3- Second area, 4- Driving, 5- First side wall, 6- Infrared fire detector, 7- Transceiver, 8- Reflector, 9- The second side wall, 10-the third side wall, 11-the fourth side wall, 12-roof, 13-beam.

detailed description

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.

Example 1

The installation method of the infrared cross-beam fire detection system in the spent fuel pool room of this embodiment, the installation method includes the following steps:

In the room of the spent fuel pool, a first area 2 for setting the spent fuel pool 1 and a second area 3 communicating with the first area 2 are divided, and the driving 4 and the first side are arranged in the second area 3 wall 5;

Use at least one infrared through-beam fire detector 6 to form the infrared through-beam fire detection system, wherein each of the infrared through-beam fire detectors 6 includes a transceiver 7 and a reflector 8;

The infrared through-radiation fire detector 6 is installed in the second area 3, so that the infrared through-radiation fire detector 6 is located above the vehicle 4, and the infrared through-radiation fire detector 6 and its upper The distance of the obstacle is M, wherein the range of M is at least 0.3 meters, and at the same time, the transceiver 7 and the reflector 8 in each infrared fire detector 6 are arranged at the same height;

The infrared through-beam fire detector 6 adjacent to the first side wall 5 is installed at a distance N from the first side wall 5, wherein the range of N is between 0.5 meters and 7 meters .

When installing multiple infrared through-beam fire detectors 6, the distance between two adjacent infrared through-beam fire detectors 6 is L, wherein the range of L is within 15 meters.

First, the spent fuel pool room will be explained.

A first side wall 5, a second side wall 9, a third side wall 10, a fourth side wall 11 and a roof 12 are arranged in the room of the spent fuel pool, and the first side wall 5 and the third side wall 10 are opposite to each other. Assume that the second side wall 9 and the fourth side wall 11 are arranged opposite to each other, the first side wall 5, the second side wall 9, the third side wall 10 and the fourth side wall 11 are connected end to end in sequence, and the roof 12 is arranged on On the top of the first side wall 5, the second side wall 9, the third side wall 10 and the fourth side wall 11, a number of beams 13 are fixedly connected under the roof 12, and the beams 13 are parallel to the first side wall 5; 12. The second side wall 9, the third side wall 10 and the fourth side wall 11 enclose the first area 2, and the roof 12, the first side wall 5, the second side wall 9 and the fourth side wall 11 enclose A second region 3 is formed.

That is to say, the spent fuel pool room is enclosed by four side walls (the first side wall 5, the second side wall 9, the third side wall 10, and the fourth side wall 11), and the roof 12 is installed on the four side walls; The connection between the first side wall 5 , the second side wall 9 , the third side wall 10 , the fourth side wall 11 and the roof 12 can be connected by a common construction connection method in the construction industry. The shape of the spent fuel pool room can be rectangular or square. In some embodiments, the shape of the spent fuel pool chamber can also be other shapes, such as triangle, regular hexagon, trapezoid and so on.

The number of beams 13 may be 2, or 3, 5, 10 or other numbers. The length direction of the beam 13 is parallel to the first side wall 5 ; in other words, one end of the beam 13 is fixed on the second side wall 9 , and the other end of the beam 13 is fixed on the fourth side wall 11 .

The roof 12, the second side wall 9, the third side wall 10 and the fourth side wall 11 enclose the first area 2. The main function of the first area 2 is to place the spent fuel pool 1. The spent fuel pool 1 is to store and Cooling of spent fuel assemblies and damaged fuel assemblies, as well as sites for underwater operations such as inspection, repair, and transportation of fuel assemblies.

The roof 12, the first side wall 5, the second side wall 9 and the fourth side wall 11 enclose the second area 3, the main function of the second area 3 is to install the infrared fire detection system, and according to the driving 4, Cabinets, cables, etc. The spent fuel pool 1 is located in the first area 2, and the infrared cross-beam fire detection system is installed in the second area 3, and the first area 2 and the second area 3 are different and interconnected areas in the room of the spent fuel pool, so that The infrared cross-beam fire detection system and the spent fuel pool 1 do not interfere with each other. When the infrared cross-beam fire detection system is installed or replaced, foreign objects can be prevented from falling into the spent fuel pool 1, and the installation or replacement of the infrared cross-beam fire detection system can be prevented. The replacement operation is easy to carry out and the operation is convenient.

The following is a description of the installation of the infrared beam-to-radiation fire detection system.

The infrared through-beam fire detection system includes at least one infrared through-beam fire detector 6 , and each infrared through-beam fire detector 6 includes a transceiver 7 and a reflector 8 . In this embodiment, the infrared through-radiation fire detection system includes two infrared through-radiation fire detectors 6, and each infrared through-radiation fire detector 6 includes a transceiver 7 and a reflector 8; The number of infrared cross-radiation fire detectors 6 included in the radiation fire detection system can also be other numbers such as 1, 3, 5, etc., and others are the same as in this embodiment.

The infrared through-radiation fire detector 6 adopts the infrared through-radiation fire detector commonly used in the prior art. The working principle of the infrared through-beam fire detector 6 is based on the principle of extinction, that is, the fire information is judged by the decrease of the intensity of the received beam. Further, the transceiver 7 emits a strongly focused beam of infrared light, and most of the beam is reflected to the transceiver 7 along the opposite optical path by the reflector 8 when there is no smoke. The returning beam generates an electrical signal which is received by the transceiver 7 . If smoke appears in the monitored area, a part of the light beam is absorbed by the smoke particles, and the other part is scattered when passing through the smoke particles, that is, the light beam changes the direction of the light path, and the weakened light beam reaches the reflector 8; after being reflected by the reflector 8, the remaining light beam Because the smoke is weakened again; therefore, only a small part of the light beam reaches the transceiver 7, and the converted electrical signal becomes very small, so it can be judged that a fire has occurred. The infrared through-beam fire detector 6 judges the fire information by monitoring the attenuation degree of the light beam.

As shown in Figure 1 and in conjunction with Figure 2, the infrared through-radiation fire detector 6 is installed in the second area 3, and the infrared through-radiation fire detector 6 is located above the driving 4, and the infrared through-radiation fire detector 6 is separated from the distance above it. The distance of the obstacle is M, and M≥0.3 meters. At the same time, the transceiver 7 and the reflector 8 in each infrared fire detector 6 are set at the same height and their positions correspond to each other;

The distance between the infrared through-beam fire detector 6 adjacent to the first side wall 5 and the first side wall 5 is N, 0.5m≤N≤7m;

When multiple infrared through-ray fire detectors 6 are installed, the distance between two adjacent infrared through-ray fire detectors 6 is L, and L≤15 meters.

M≥0.3 meters is because: if M<0.3 meters, the distance between the infrared through-radiation fire detector 6 and the obstacle is too close, and the obstacle will affect the detection accuracy of the infrared through-radiation fire detector 6 to the fire. The position of the through-beam fire detector 6 is relatively high, so it is inconvenient to install and replace the infrared through-beam fire detector 6, and it is inconvenient to construct; Objects will not affect the detection accuracy of the infrared through-radiation fire detector 6 to the fire, so that the detection accuracy is higher, and the position of the infrared through-radiation fire detector 6 is suitable at the same time, which is convenient for construction.

0.5m≤N≤7m is because: if N<0.5m, the distance between the infrared direct fire detector 6 adjacent to the first side wall 5 and the first side wall 5 is too close, which will affect the infrared direct fire Detector 6 is to the detection accuracy of fire; If N＞7 meters, then the distance between the infrared beam fire detector 6 adjacent to the first side wall 5 and the first side wall 5 is too far, will cause the blind area of detection, this moment does not Conducive to the comprehensive monitoring of fire; 0.5 meters ≤ N ≤ 7 meters, that is to fully consider the detection range of the infrared fire detector 6, and avoid the influence of the detection accuracy of the infrared fire detector 6, which is also beneficial to the fire protection comprehensive monitoring.

L ≤ 15 meters is because: L > 15 meters, there will be detection blind spots between two adjacent infrared fire detectors 6, which is not conducive to comprehensive monitoring of fires; L ≤ 15 meters is conducive to comprehensive monitoring of fires , which can avoid detection blind spots.

As shown in Figure 2, in the present embodiment, the beam 13 is used as the obstacle above the infrared through-ray fire detector 6, the transceiver 7 is fixed on the second side wall 9, and the The reflector 8 is fixed on the corresponding position of the fourth side wall 11; the vertical distance between the bottom of the beam 13 and the transceiver 7 is M, and M≥0.3 meters; specifically, M is 0.8 meters, N is 5 meters, and L It is 12 meters. In some embodiments, it can also be: M is 0.3 meters, N is 0.5 meters, and L is 15 meters; or, M is 0.4 meters, N is 7 meters, and L is 10 meters; or, M is 0.9 meters, and N Or, M is 0.5 meters, N is 3 meters, and L is 8 meters; or, M is 1 meter, N is 4 meters, and L is 7 meters; others are the same as in this embodiment. In this embodiment, preferably, 0.3m≤M≤1m, at this time, a better effect of fire monitoring can be achieved, and it is also convenient to install and replace the infrared cross-beam fire detector 6 .

In some embodiments, it is also possible to fix the transceiver 7 on the fourth side wall 11, and fix the reflector 8 on the corresponding position of the second side wall 9; the distance between the bottom of the beam 13 and the transceiver 7 The vertical distance is M, M≥0.3 meters. Others are the same as this embodiment.

The infrared through-beam fire detection system in the spent fuel pool room of this embodiment will be described below.

The infrared through-beam fire detection system in the spent fuel pool room of this embodiment, the infrared through-beam fire detection system includes at least one infrared through-beam fire detector 6, and each of the infrared through-beam fire detectors 6 includes a transceiver 7 and a reflector 8;

In the room of the spent fuel pool, a first area 2 for setting the spent fuel pool 1 and a second area 3 communicating with the first area 2 are divided, and the driving 4 and the first side are arranged in the second area 3 wall 5;

The infrared through-ray fire detector 6 is installed in the second area 3, so that the infrared through-ray fire detector 6 is located above the driving 4, and the infrared through-ray fire detector 6 and the obstacles above it The distance of the object is M, wherein the range of M is at least 0.3 meters, and at the same time, the transceiver 7 and the reflector 8 in each of the infrared through-ray fire detectors 6 are arranged at the same height;

The infrared through-beam fire detector 6 adjacent to the first side wall 5 is installed at a distance N from the first side wall 5, wherein N ranges from 0.5 meters to 7 meters.

The infrared through-beam fire detection system also includes fasteners for mounting the transceiver 7 and the reflector 8 . Fasteners are, for example, screws or pins or buckles.

In some embodiments, the infrared through-beam fire detection system further includes a power supply unit for supplying power to the transceiver 7 and the reflector 8 . The power supply unit can ensure that the transceiver 7 and the reflector 8 work normally in case of an emergency (such as a power failure in the spent fuel pool room), so that the infrared through-beam fire detection system can also be used in the spent fuel pool room in the above emergency situation. Timely and effective monitoring and alarming of fire conditions. Others are the same as this embodiment.

In some embodiments, the infrared through-beam fire detection system can also be connected to the control center, so that the fire situation can be fed back to the control center in time for the operators in the control center to make decisions.

Example 2

As shown in Figure 3, the roof 12 is used as the obstacle above the infrared radiation fire detector 6, the reflector 8 is fixed on the side of the beam 13, and the transceiver 7 is fixed on the first On the corresponding positions of the two side walls 9; the vertical distance between the bottom of the roof 12 and the transceiver 7 is M, and M≥0.3 meters. Others are the same as in Example 1.

Example 3

The roof 12 is used as the obstacle above the infrared fire detector 6, the reflector 8 is fixed on the side of the beam 13, and the transceiver 7 is fixed on the corresponding side of the fourth side wall 11. In terms of position: the vertical distance between the bottom of the roof 12 and the transceiver 7 is M, and M≥0.3 meters. Others are the same as in Example 1.

Example 4

The roof 12 is used as the obstacle above the infrared fire detector 6, and the transceiver 7 and the reflector 8 are all fixed on the side of the beam 13, and the bottom of the roof 12 is separated from the transceiver 7. The vertical distance is M, M≥0.3 meters. Others are the same as in Example 1.

Example 5

The roof 12 is used as the obstacle above the infrared fire detector 6, the transceiver 7 is fixed on the side of the beam 13, and the reflector 8 is fixed on the corresponding side of the fourth side wall 11. In terms of position: the vertical distance between the bottom of the roof 12 and the transceiver 7 is M, and M≥0.3 meters. Others are the same as in Example 1.

Example 6

The roof 12 is used as the obstacle above the infrared fire detector 6, the transceiver 7 is fixed on the side of the beam 13, and the reflector 8 is fixed on the opposite side of the second side wall 9. In the corresponding position; the vertical distance between the bottom of the roof 12 and the transceiver 7 is M, and M≥0.3 meters. Others are the same as in Example 1.

Embodiments of the present invention have been described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementations, and the above-mentioned specific implementations are only illustrative, rather than restrictive, and those of ordinary skill in the art will Under the enlightenment of the present invention, many forms can also be made without departing from the gist of the present invention and the protection scope of the claims, and these all belong to the protection of the present invention.

Claims (9)

1. An installation method of an infrared cross-radiation fire detection system in a spent fuel pool room, characterized in that the installation method comprises the following steps: In the room of the spent fuel pool, a first area (2) for setting the spent fuel pool (1) and a second area (3) communicating with the first area (2) are divided, in the second area ( 3) set the driveway (4) and the first side wall (5) inside; Using at least one infrared through-beam fire detector (6) to form the infrared through-beam fire detection system, wherein each of the infrared through-beam fire detectors (6) includes a transceiver (7) and a reflector (8) ; The infrared through-radiation fire detector (6) is installed in the second area (3), so that the infrared through-radiation fire detector (6) is located above the vehicle (4), and the infrared through-radiation fire detector The distance between the radiation fire detector (6) and the obstacle above it is M, wherein the range of M is at least 0.3 meters, and at the same time, the transceiver (7) and The reflectors (8) are arranged at the same height; The infrared through-beam fire detector (6) adjacent to the first side wall (5) is installed at a distance of N from the first side wall (5), wherein the range of N is 0.5 meters to 7 meters. 2. The installation method of the infrared through-beam fire detection system in the spent fuel pool room according to claim 1, characterized in that when installing a plurality of said infrared through-beam fire detectors (6), two adjacent said The distance between the infrared radiation fire detectors (6) is L, and the range of L is within 15 meters. 3. The installation method of the infrared through-beam fire detection system in the spent fuel pool room according to claim 1, further comprising the following steps: The second side wall (9), the third side wall (10), the fourth side wall (11) and the roof (12) are set in the room of the spent fuel pool, and the first side wall (5) and the The third side wall (10) is opposite to each other, the second side wall (9) and the fourth side wall (11) are opposite to each other, the first side wall (5), the second side wall The wall (9), the third side wall (10) and the fourth side wall (11) are connected end to end in sequence, and the roof (12) is arranged on the first side wall (5), the Above the second side wall (9), the third side wall (10) and the fourth side wall (11), several beams (13) are fixedly connected under the roof (12), the The beam (13) is parallel to the first side wall (5); the roof (12), the second side wall (9), the third side wall (10) and the fourth side wall (11) Enclosing and forming the first area (2), the roof (12), the first side wall (5), the second side wall (9) and the fourth side wall ( 11) Enclosing and forming the second region (3). 4. The installation method of the infrared through-beam fire detection system in the spent fuel pool room according to claim 3, further comprising the following steps: The beam (13) is used as the obstacle arranged above the infrared fire detector (6), and the transceiver (7) is fixed on the second side wall (9), fixing the reflector (8) on the fourth side wall (11); Alternatively, the transceiver (7) is fixed on the fourth side wall (11), and the reflector (8) is fixed on the second side wall (9). 5. The installation method of the infrared through-beam fire detection system in the spent fuel pool room according to claim 3, further comprising the following steps: The roof (12) is used as the obstacle above the infrared beam fire detector (6), and the transceiver (7) and the reflector (8) are fixed on the The side of the beam (13). 6. The installation method of the infrared through-beam fire detection system in the spent fuel pool room according to claim 3, further comprising the following steps: The roof (12) is used as the obstacle above the infrared beam detector (6), the transceiver (7) is fixed on the side of the beam (13), and the The reflector (8) is fixed on the fourth side wall (11), or the reflector (8) is fixed on the second side wall (9). 7. The installation method of the infrared cross-beam fire detection system in the spent fuel pool room according to claim 3, further comprising the following steps: The roof (12) is used as the obstacle above the infrared radiation fire detector (6), the reflector (8) is fixed on the side of the beam (13), and the The transceiver (7) is fixed on the fourth side wall (11), or the transceiver (7) is fixed on the second side wall (9). 8. An infrared through-beam fire detection system for a spent fuel pool room, characterized in that the infrared through-beam fire detection system includes at least one infrared through-beam fire detector (6), and each of the infrared through-beam fire detectors The device (6) includes a transceiver (7) and a reflector (8); In the room of the spent fuel pool, a first area (2) for setting the spent fuel pool (1) and a second area (3) communicating with the first area (2) are divided, in the second area ( 3) set the driveway (4) and the first side wall (5) inside; The infrared through-beam fire detector (6) is installed in the second area (3), so that the infrared through-beam fire detector (6) is located above the vehicle (4), and the infrared through-beam fire detector The distance between the fire detector (6) and the obstacle above it is M, wherein the range of M is at least 0.3 meters, and at the same time, the transceiver (7) and the The reflectors (8) are located at the same height; The infrared through-beam fire detector (6) adjacent to the first side wall (5) is installed at a distance of N from the first side wall (5), wherein the range of N is 0.5 meters to 7 meters. 9. The infrared through-beam fire detection system for the spent fuel pool room according to claim 8, characterized in that the infrared through-beam fire detection system further includes (8) A power supply unit for power supply; the infrared through-beam fire detection system further includes fasteners for installing the transceiver (7) and the reflector (8).