JPS63184099A - Air conditioner for housing including radioactive substance - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to an air conditioning system for a building containing radioactive materials that also has a function of capturing and removing tritium.

(Conventional technology) In the buildings of facilities where tritium is likely to be generated (hereinafter referred to as tritium-related facilities), such as nuclear fusion facilities or nuclear fuel reprocessing facilities, in addition to regular ventilation and air conditioning, tritium gas is diffused outside. Prevention measures are necessary.

In conventional tritium-related facilities of this type, as shown in FIG. 4, a room 11 to be air-conditioned and a series of air conditioning equipment are connected by a circulation pipe 18, and air is supplied and exhausted by a blower 17. Air exhausted from the air-conditioned room 11 passes through a humidifier 12 , an air conditioner 13 , and a blower 17 in this order, and the air is adjusted by adding moisture by the humidifier 12 .

Further, fine particles and the like are removed by a coarse filter 14 and a fine filter 20 incorporated in the air conditioner 13, and cooling and dehumidification are performed by a cooling coil 15.

Normally, this system is controlled so that the atmospheric air in the air-conditioned room 11 can be adjusted to a predetermined temperature and humidity range.

Further, a tritium purification equipment 28 is provided in parallel with this, and the air-conditioned room 11 and the tritium purification equipment 28 are connected by a circulation system independent of the circulation pipe 18, and are supplied and exhausted by the blower 21. The exhausted contaminated air is sent to a series connected blower 21. Preheater 22, catalyst tower 23.
Cooling @24. The catalyst tower 23 is used to convert tritium (T, TD, TH) into oxides, and to maintain it at an appropriate temperature. The gas is adjusted by a heater and the inflow gas is heated in advance by preheating 41122. Further, the adsorption tower 25 is for adsorbing and removing oxidized tritium water vapor, but since the lower the temperature is, the catalyst tower 23
The gas that exits is cooled down to about room temperature in a cooler 24. The adsorption tower 25 reaches saturation with tritium water vapor over time. At this time, the adsorbed water vapor evaporates and is transferred to the regeneration equipment 2.
7 and is collected as a drain.

The drain from the regeneration facility 27 and the drain from the cooling coil 15 of the air conditioning facility described above are both sent to a radioactive waste processing facility (not shown).

By using the tritium purification equipment 28 in conjunction with the ventilation air conditioning equipment in this way, when tritium is generated, it can be purified.

By the way, the coarse filter 14 and fine filter 20 used in this air conditioner 13 for removing particulates, and the catalyst tower 23 used in the tritium purification equipment 28, are used to treat particulates such as aerosols, which are impurities in the air, or tritium gas. These are components that are directly connected to each other and are installed independently as separate units.

The figure is a cross-sectional view of the structure seen from above. In FIG. 6, a filter material 2, which is a folded filter cloth or filter paper material, is attached to an outer frame 5 by a support 4, and gas flows in from the direction of the arrow 1. A gap is provided between the filter media 2 by a separator 6 to improve the gas flow that has passed through the filter media 2. Also.

A gasket 7 is also used to prevent gas from leaking between the outer frame 5 and the filter medium 2.

(Problems to be Solved by the Invention) The ventilation air conditioning equipment described above can remove tritium regardless of the form of generated tritium. Since it is necessary to install the equipment 28 in parallel, the installation space becomes large, and this also causes an increase in building construction costs.

However, the present invention was made to eliminate the above-mentioned problems, and it is possible to remove tritium generated in an air-conditioned room in any form, including single tritium, and is small and requires little installation space. The purpose is to provide ventilation and air conditioning equipment that is not available.

[Structure of the invention]

(Means for Solving the Problems) The present invention provides an air conditioning system for a building containing radioactive materials in which a building that internally generates tritium is provided with circulation piping including an air conditioner having a humidifier, a filter, and a cooling coil. The filter was equipped with a hydrogen oxidizing catalyst, and the cooling coil's drain pipe was connected to radioactive waste treatment equipment.

(Function) When tritium is generated in the building while the air conditioner is operating, the circulating tritium becomes tritium water vapor by the action of the hydrogen oxidizing catalyst attached to the filter inside the air conditioner, and is liquefied by the cooling coil. Afterwards, it is stored in a radioactive waste treatment facility via a drain pipe.

(Example) An example of the present invention will be described below with reference to FIGS. 1 and 2.

In FIG. 1, a circulation pipe 18 is led out from the air-conditioned room 11 through a stop valve 19, and a humidifier 12, an air conditioner 13, and a blower 17 are inserted in this order, and then the stop valve 19 is inserted again.
9 and is introduced into the room 11 to be air conditioned.

The air conditioner 13 includes, in order from the suction side, a coarse filter 14, a fine filter 30. A cooling coil 15 and a heating coil 16 are provided, and a drain pipe 31 from the cooling coil 15 is led to a radioactive waste processing facility (not shown).

The details of the fine filter 30 are as shown in the horizontal cross-sectional view of FIG. installed. Filter media 2
A hydrogen oxidizing catalyst powder 3 is applied to the surface of the holder. The material for the catalyst powder 3 is palladium or platinum. Further, a heater may be attached to the support 4 to heat it, and the arrow 1 indicates the inflow direction of the circulating air.

Next, the effect of this will be described.

When the stop valve 19 is opened and the blower 17 is operated, the air in the air-conditioned room 11 is circulated through the circulation pipe 18. Air sucked from the air-conditioned room 11 is moistened by a humidifier 12, fine particles are removed by a coarse filter 14 and a fine filter 30, and a cooling coil 15 and a heating coil 16 are respectively controlled to perform cooling and dehumidification. After being heated, it is returned to the air-conditioned room 11, and the air-conditioned room 11 is kept clean and at an appropriate temperature and humidity.

When tritium is generated in the air-conditioned room 11, this tritium is sucked into the air conditioner 13, and when it passes through the fine filter 30, it comes into contact with the catalyst powder 3, where it is oxidized and becomes tritium water vapor. This tritium water vapor is condensed and liquefied by the cooling coil 15, and the drain pipe 31
After that, it is discharged to a radioactive waste treatment facility.

Therefore, according to this embodiment, it is possible to effectively remove one generated tritium without separately providing tritium purification equipment, and the tritium purification equipment and its installation space are unnecessary.

Note that the fine filter 30 has a filter medium 2 as shown in FIG.
The gap on the air inflow side may be filled with particulate catalyst 8, and the same effect as described above can be obtained.

〔Effect of the invention〕

According to the present invention, tritium purification equipment is not required separately, so not only can the equipment be converted into an MJ, but the installation space can also be saved, and in the past, it was not possible to effectively capture tritium while only the air conditioning equipment was in operation. It is possible to provide an air conditioning system for a building containing radioactive materials that can constantly remove tritium.

[Brief explanation of the drawing]

Fig. 1 is a system diagram showing one embodiment of the present invention, and Fig. 2 is a system diagram showing an embodiment of the present invention.
Figure 3 is a cross-sectional view showing the details of the fine filter shown in Figure 2, Figure 3 is a cross-sectional view showing a modification of Figure 2, Figure 4 is a system diagram showing the conventional air conditioning system for a building containing radioactive materials, and Figure 5 is the One person showing details of the fine filter shown in the figure 8...Catalyst 11...Air conditioned room 12
... Humidifier ] 3 ... Air conditioner 15 ...
Cooling coil 18...Circulation piping 20...1B
Fine filter 3o...Fine filter 31...Drain piping agent Patent attorney Nori Ken Ken Yudo Hirofumi Mitsumata Figure 1 Figure 2 Figure 3 Figure 4 To the processing cell

Claims (1)

[Claims] 1. In an air conditioner for a building containing radioactive materials, in which a building that generates tritium internally is provided with circulation piping that includes an air conditioner having a humidifier, a filter, and a cooling coil, the filter has a hydrogen oxidizing property. An air conditioning system for a building containing radioactive materials, characterized in that the cooling coil is equipped with a catalyst and the drain pipe of the cooling coil is connected to a radioactive waste processing facility. 2. The air conditioning system for a building containing radioactive materials according to claim 1, wherein the catalyst is a powdered catalyst applied to the filter medium of the filter. 3. The air conditioning system for a radioactive substance holding facility as set forth in claim 1, wherein the catalyst is a particulate catalyst interposed in the filter medium of the filter.