JPH01310246A - Ventilating air conditioner for nuclear power plant - Google Patents

Abstract

PURPOSE:To constantly prevent air on operating floors and a temporary floor from flowing out to other sections by disposing exhaust ducts separately on first and second operating floors, joining the exhaust ducts for the first and second operating floors by extending the ducts into the temporary floor, and providing a simple partition having a fixed opening area and capable of being opened and closed between each of the operating floors and the temporary floor. CONSTITUTION:An exhaust duct 6b provided for a second operating floor 3 is extended into an adjacent temporary floor 2. An air quantity regulating damper 9 is provided in an intermediate part of the duct thus extended, and the quantity of exhaust from the second operating floor 3 and the temporary floor 2 is thereby regulated so that an air flow to the side of the temporary floor 2 is generated when a simple partition 8b is provided. Practically, this can be achieved by setting the quantity of exhaust from the second operating floor 3 to be smaller than the quantity of intake into the floor 3, and exhausting a surplus of air through the temporary floor 2. The quantity of air conveyed through the simple partition is regulated by the damper 9 according to the opening area of the partition so that the quantity falls in the shaded region in the diagram. This is determined in consideration of the prevention of backflow of air and the protection of the simple partition on a strength basis.

Description

[Detailed Description of the Invention] ``Purpose of the Invention (Field of Industrial Application) The present invention relates to a common temporary storage floor for turbine equipment (hereinafter referred to as a temporary storage floor) installed between two turbine operating beds constructed at different times. This invention relates to ventilation and air conditioning equipment for nuclear power plants.

(Conventional technology) When one plant is undergoing periodic inspection of two turbine operating beds built at different times, a simple partition is installed to prevent dust from that area from spreading to the operating turbine bed of the other plant. established, or prevented by a transfer plan. That is, since the preceding turbine III and the common laydown area are being constructed at the same time, the plan is to install an air supply duct and an exhaust duct in the preceding turbine building and the common laydown area, and to transfer the air to the common laydown area. However, the common laydown area was already air-conditioned when the succeeding turbine building was constructed, so if the transfer plan was made using the air-conditioning system of the preceding turbine, the actual situation would be that the transfer would not be carried out because it would result in duplicate equipment. .

A conventional ventilation air conditioning system for a turbine operating bed will be described with reference to FIG.

In Fig. 3, the original number 1 is the leading turbine operating bed (hereinafter referred to as the first operating bed), 2 is the temporary floor, and 3 is the succeeding turbine operating bed (hereinafter referred to as the first operating bed).
(hereinafter referred to as the second driving floor). The first operating floor 1 and the temporary storage floor 2 need to be constructed and operated earlier than the second operating floor 3. Therefore, the first
The preceding turbine building blower 4a is installed on the operating floor 1 and temporary storage floor 2.
A first air supply duct 5a that sends air from two areas,
In other words, it is integrated and installed so as to span the first operating floor 1 and the temporary storage floor 2. Further, an exhaust duct 6a is integrated and installed to straddle the two areas to exhaust the air from the two areas to the atmosphere through the preceding turbine building exhaust ff1n7a.

On the other hand, for ventilation of the second operating floor 3 that will be added later, an air supply duct 5b that sends cooling air from the succeeding turbine building ventilation @ 4b is installed on the second operating floor 3, and exhaust air is supplied to the second operating floor 3. 3
The exhaust duct 6b installed in the turbine building was used to exhaust air into the atmosphere using the exhaust air 17b from the subsequent turbine building.

(Problems to be Solved by the Invention) According to the prior art described above, when one of the operating floors undergoes periodic inspection work after completion of the preceding turbine building and the succeeding turbine building, updrafts due to heat generated by the operating turbines As a result, the air in the entire first and second operating floors is agitated, and therefore radioactive dust that may be generated during periodic inspection work is diffused to the operating floors. The problem here is that although radiation control on the operating floor during operation can be simplified compared to the operating floor during periodic inspections, there is no problem, but when considering dust dispersion, Radiation control is also required for the operating floor during operation. For this purpose, by installing simple partitions F3a and 3b that can be opened and closed between the operating floor and the temporary storage floor, and closing the simple partitions F3a and 8b between the operating floor and the temporary storage floor during operation, dust can be removed. We are working to prevent the spread.

However, since the simple partitions 3a and F3b have an opening/closing function, it is not possible to maintain complete airtightness. With such a partition, a large flow of air is stopped, but some air still enters and exits.

For this purpose, the first driving bed 1 is in operation and the second driving bed 3 is in operation.
is under periodic inspection, the simple partition 8a on the first operating floor 1 side is closed and the air supply duct 5a and exhaust duct 6 are closed in advance to prevent air from flowing into the first operating floor 1 during operation.
The distribution of air supply and exhaust air to and from the temporary storage floor 2 is adjusted using an air volume adjustment damper 9 provided in the middle of a, so that air is always transferred from the first operating floor 1 to the temporary storage floor 2 side.

Specifically, the exhaust air volume in the same area is made smaller than the air supply air volume to the first operating floor 1, and the exhaust air volume in the same area is made larger than the air supply air volume to the temporary storage floor 2. This can be achieved by matching the air volume of the first exhaust fan 7a.

However, a problem here arises when the second operating floor 3 is in operation and the first operating floor 1 and temporary storage floor 2 are undergoing periodic inspection.

First, a simple partition 8b@ is provided on the second driving floor 3 side,
In the conventional ventilation air conditioner described in FIG. 3, since the same amount of air is supplied and exhausted on the second operating floor 3, air cannot be transferred to the temporary storage floor 2, and the inflow of dust cannot be prevented. In addition, as shown in FIG. 4, when the air supply duct 5b and the exhaust duct 6b are integrated and drawn into the temporary storage floor 2 as in the first operation floor 1, the ventilation air volume to the temporary storage floor 2 is doubled. It becomes a waste of equipment.

The present invention has been made to solve the above problems, and is a ventilation system for a temporary storage floor installed between the first and second operating floors, which were constructed at different times. The purpose of the present invention is to provide a ventilation air conditioning system for a nuclear power plant that can always prevent air from the operating floor and temporary storage floor during periodic inspection from flowing out to other areas even if periodic inspection work is performed on the operating floor. .

[Structure of the Invention] (Means for Solving the Problems) That is, the ventilation air conditioning system for a nuclear power plant according to the present invention is provided by installing in advance air supply ducts for two turbine operation floors of two nuclear power plants and a temporary storage floor between them. The first operating floor and temporary storage floor are installed as an integrated unit, and the air supply duct of the second operating floor is installed separately, the exhaust duct is installed separately on the operating floor, and the temporary storage floor is installed with both operating floors. The floor exhaust duct is integrated and installed, a damper for adjusting air volume is installed in the lead-in duct, and a simple partition with a fixed opening that can be opened and closed is provided between each operating floor and temporary storage floor. It is characterized by

(Function) A specified amount of air is sent to each floor from the preceding turbine building blower to the first operating floor and temporary storage floor using the air supply duct. In addition, the exhaust volume from each floor is smaller than the supply air volume on the first driving floor.
On the temporary storage floor, the amount of air will be greater than the supply amount and will be exhausted by the preceding turbine building exhaust fan.

A specified amount of air is sent to the second operating floor from the subsequent turbine building blower. Further, the amount of exhaust air from the same body is smaller than the amount of air supply, and the area is exhausted by an exhaust duct drawn to the temporary storage floor, and then exhausted by a second exhaust fan.

In this way, even if either the preceding or following operating floor or temporary storage floor is used for periodic inspection, by creating a simple partition, the opening can be used to conduct regular inspections from the operating floor that is currently in operation. It becomes possible to transfer to the operating floor and temporary storage floor.

(Example) An example of a ventilation air conditioning system for a nuclear power plant according to the present invention will be described with reference to FIGS. 1 and 2.

That is, the same parts as in FIG. 3 are indicated by the same reference numerals. That is, in the present invention, as shown in FIG.
Turbine equipment is shared between a first operating floor 1, which is installed in advance in a turbine building (not shown), and a second operating floor 3, which is installed subsequently, corresponding to the first and second nuclear power plants, respectively. Temporary storage floor 3 is installed. The air supply duct 5a of this temporary storage floor 2 is an integrated duct that communicates the first operation floor 1 and the temporary storage floor 2. Further, the air supply duct 5b of the second driving floor 3 is an independent duct. Furthermore, the exhaust ducts 6b of the temporary storage floor 2 and the second operating floor 3 are integrated ducts that communicate with each other. In addition, the temporary storage floor 2 and the first operation floor 1
The exhaust duct 6a is a communicating integrated duct. A damper 9 for adjusting air volume is interposed in each of the integrated ducts 5a, 6a, 6b at the respective operating floors 1, 2.degree.3. Between the first and second operating floors 1, 3 and the temporary storage floor 2 is a partition 8a which can be opened and closed and has a fixed opening.

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Next, a ventilation air conditioning method in the above device will be explained.

First, the ventilation air conditioning system for the first operating floor 1 and the temporary storage floor 2 is
It is assumed that the conventional technique shown in the figure or FIG. 4 is used as is.

Next, regarding the ventilation air conditioner for the succeeding turbine building, the outside air taken in by the succeeding turbine building blower 4b is blown through the air supply duct 5b only in the amount of air required by the second operating floor 3. Further, the exhaust air from the same body is exhausted from the second operating floor 3 using the exhaust duct 6b, and is discharged into the atmosphere by the succeeding turbine building exhaust fan 7b. The noteworthy point of the present invention is that the exhaust duct 6b installed on the second operating floor 3 is drawn to the adjacent temporary storage floor 2. By installing an air volume adjustment damper 9 in the middle of the drawn duct and adjusting the amount of exhaust air from the second operation floor 3 and temporary storage floor 2, when the simple partition 8b is installed, the air flows to the temporary storage floor 2 side. Make sure that there is a flow. Specifically, the second
This can be achieved by reducing the amount of air exhausted from the same unit than the amount of air supplied to the operating floor 3, and then exhausting the remaining air from the temporary storage floor 2. At this time, the air volume adjusting damper 9 is adjusted so that the amount of air transferred through the simple partition falls within the range indicated by the hatched part in FIG. 2, depending on the opening area of the simple partition. This decision was made in consideration of prevention of backflow of airflow and protection of the strength of the simple partition.

[Effects of the Invention] According to the present invention, regarding the first and second operating floors constructed at different times and the temporary storage floor installed between them, when one of the operating floors and the temporary storage floor enters periodic inspection work, the temporary storage unit side Even if temporary equipment storage work is performed with the simple partitions opened, contaminated air from the operating floor and temporary storage floor during periodic inspections can be always prevented from flowing into the operating floor during operation.

[Brief explanation of the drawing]

FIG. 1 is a schematic system diagram of a ventilation air conditioner showing an embodiment of the present invention, FIG. Figures 3 and 4 are schematic system diagrams showing conventional ventilation air conditioners, respectively. 1... Leading turbine operating floor 2... Turbine equipment common temporary storage floor 3... Following turbine operating floor 4a... Leading turbine building blower 5a... Air supply duct 6a... Exhaust duct 7a... Leading turbine building exhaust fan 4b...Following turbine building fan 5b...Air supply duct 6b...Exhaust duct 7b...Following turbine building exhaust fan 8a...Simple partition 8b...Simple partition 9...・Air volume adjustment damper (8733) Agent: Yoshiaki Inomata, patent attorney (and others)
1 person)

Claims (1)

[Claims] A turbine equipment common temporary storage floor is installed between a first operation floor that is installed in advance and a second operation floor that is installed subsequently in the turbine building, corresponding to the first and second nuclear power plants, respectively. The air supply duct for the storage floor is an integrated duct that communicates the first operation floor and the temporary storage floor, and the air supply duct for the second operation floor is an independent duct that communicates the air between the temporary storage floor and the second operation floor. An integrated duct that communicates with the duct is installed, and an integrated duct that communicates with the exhaust duct of the temporary storage floor and the first operating floor is installed, and a damper for adjusting air volume is interposed in the integrated duct on each operating floor. A ventilation air conditioning system for a nuclear power plant, characterized in that a partition is provided between each of the operating floors and the temporary storage floor, which can be opened and closed and has a fixed opening.