JPS5882199A - Duct facility of atomic power plant - 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 The present invention relates to ventilation equipment, and particularly to ventilation equipment suitable for use in nuclear power plants and the like.

Exhaust from the ventilation equipment of a nuclear power plant, which may be contaminated with radioactivity, is treated by an exhaust filter in an exhaust treatment device and then released into the atmosphere from the main stack. Exhaust fans in conventional nuclear power plants belong to the ventilation equipment of each building, and are installed in each building.

Exhaust fans in each building can be installed without stopping ventilation equipment.
Spare equipment is required for maintenance, etc., and %5 is required for each building.
A spare machine with 0% or 100% capacity is provided.

A conventional example is shown in FIG. Reactor building 1. Auxiliary building9. Turbine building 15. Exhaust air from the ventilation equipment of the waste treatment building 21 is guided to the respective exhaust treatment devices 3, 11, 17.23 by the exhaust ducts 2゜10.16.22 of each building, and is passed through exhaust filters 4, 12.18. 24. The filtered exhaust air is passed through exhaust fans 5, 13, 19.25
It passes through exhaust ducts 6.14, 20.26 and main exhaust duct 7, and is discharged to the atmosphere from main exhaust stack 8. In this conventional example, the reactor building exhaust fan 5 degrees, the auxiliary building exhaust fan 13 degrees. jl-bin building exhaust fan 19. Since each of the waste treatment building exhaust fans 25 has a spare unit with 100% capacity, the installed capacity is twice the operating capacity. Additionally, four types of exhaust fans with different capacities are installed in each building.

An object of the present invention is to provide ventilation equipment for a nuclear power plant that can reduce the installed capacity of exhaust fans and improve maintainability.

The present invention reduces the reserve margin of the installed capacity of the exhaust fan of the ventilation equipment in each building relative to the operating capacity, and improves maintainability by making it possible to measure the compatibility of parts. They are installed centrally in several locations, and each exhaust fan uses the same model.

An embodiment of the invention is shown in FIG. Reactor building l.

Auxiliary building9. Turbine building 15. Exhaust air from the waste treatment building 21 passes through the exhaust ducts of each building (2, 10° 16, 22) and is led to the centralized exhaust treatment device 27. After being processed by the centralized exhaust filter 28 installed in the centralized exhaust treatment device 27, the main exhaust duct 7 is
It is then released into the atmosphere from the main exhaust stack 8. The exhaust volume from reactor building 1 is Am' /H1 The exhaust volume from auxiliary building 9 is Bm'' /H, the exhaust volume from turbine building 15 is C
m3/H% emissions from waste treatment building 21 to 0
m3, "H", in the conventional example shown in Figure 1, the exhaust fans in each building have a spare unit with 100% capacity, so the installed capacity is equal to the total operating capacity of all the exhaust fans. The ratio is 2 according to the following formula.

2A+2B+2C'+2D22 (A+B+(1'+D
) On the other hand, in the above embodiment, the central exhaust fan has a spare of 1
If one unit is installed and the other three units are used to exhaust all the air from each building, the capacity per unit is as follows.

A+B+C+D, and the ratio of the installed capacity to the total operating capacity of all exhaust fans is approximately 1.3 as shown below, which is significantly reduced compared to the conventional example.

#1.3 (A+B+C1'D) On the other hand, in the conventional example, each building has Am3/H.

Bm” /I-1, Cm3/H, Dm3/H (IJ)4
It is only necessary to install four exhaust fans, and all the exhaust fans are installed in one place, which is advantageous compared to the conventional example in terms of interchangeability of exhaust fan parts and maintenance.

In addition, by centrally installing the exhaust fans and also centrally installing the exhaust treatment device, it is possible to reduce the installed capacity of the exhaust filter in the exhaust treatment device as well as the exhaust fan, and to improve maintainability.

Since exhaust filters are expected to collect a small amount of radioactive materials, improving maintainability will also contribute to reducing radiation exposure for workers.

According to the invention, the reserve margin of the exhaust fan and.

Since the number of installed units is reduced, the ratio of installed capacity to operating capacity can be reduced. Additionally, all exhaust fans are of the same model and installed in one location, improving maintainability.

[Brief explanation of drawings]

FIG. 1 is a system configuration diagram showing a conventional example, and FIG. 2 is a system configuration diagram showing an embodiment of the present invention.

Claims (1)

[Claims] 1. Ventilation equipment for a nuclear power plant including an exhaust treatment device and an exhaust fan, characterized in that the exhaust fan for transferring exhaust gas to the main exhaust stack is centrally installed at one location.