JPS59136684A - Feedwater device of auxiliary machine cooling facility - 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 [Field of Application of the Invention] The present invention relates to high-pressure auxiliary cooling equipment for power plants, and particularly to a make-up water system that can easily supply water without requiring a high-pressure water source.

[Prior art]

The system configuration of conventional pressure-controlled auxiliary equipment cooling equipment is shown in Figure 1, and the make-up water system is shown in Figure 2. A high-pressure make-up water system was required to overcome the pressure, and there was a problem in that it required extra power equipment such as a high-pressure pump, and space for the power supply and straw in addition to the power plant's general water supply source.

FIG. 1 shows an outline of a residual heat removal equipment cooling system as an example of a differential pressure armature cooling equipment.

Reactor water is circulated to the residual heat removal heat exchanger 1 by a residual heat removal pump 7 and pipes 8 and 9. The closed loop auxiliary cooling equipment for cooling the secondary water is comprised of a middle loop cooling pump 3, a heat exchanger 5, and piping 2, 4.6. Furthermore, this closed loop auxiliary cooling equipment is cooled by a seawater pump 10 and piping 11, 12 via an intermediate loop cooling heat exchanger 5. In other words, the configuration includes a closed-loop cooling system between the reactor secondary water system and the cooling source seawater system. A pressure regulating tank 17 is connected to this closed loop cooling system through piping 18.
It receives pressurized air from a viewing compressor 13 via a pipe 15 and is pressurized. This amount of pressurization is set so that the pressure on the closed-loop cooling system side is higher than that on the fire and water side of the reactor, so that even if a tube leak occurs in the residual heat removal heat exchanger 1, the radioactive liquid remains in the reactor. The settings are set so that the missing book does not leak into the cooling water side. Make-up water to the closed loop cooling system is supplied to the piping 16 by overcoming the cooling water pressure from the high-pressure water supply device 14.
It is done through.

Figure 2 shows the details of the structure around the pressure regulating tank, including the make-up water system k.

The high-pressure water supply device 14 includes a make-up water tank 26, piping 27, a make-up water pump 28, an iH, a valve train 29, and a check valve 30. In response to a low water level signal from the water level gauge 31 of the pressure regulating tank 17, the electric valve 29 is activated and the make-up water pump 28 is activated to supply water under pressure.

The pressure regulating tank 17 is pressurized using an air compressor 13 and an electric valve 21.
, the check valve 22 and the piping 23, and the pressure is reduced by an air vent from the electric valve 24 and the piping 25V.

As mentioned above, as make-up water to the highly pressurized closed loop sleeve machine cooling equipment, a water supply system with a pressure high enough to overcome the system pressure is required, so it is used frequently to create a high-pressure water source. Even though the amount of water was small, extra equipment such as pressure pumps was still required.

[Purpose of the invention]

An object of the present invention is to provide a make-up water facility that uses a low-pressure water source, which is a common facility in a brewery, to supply water to commercial and industrial auxiliary cooling equipment.

[Summary of the invention]

The present invention focuses on the fact that the auxiliary equipment cooling equipment consisting of an intermediate closed loop is pressurized by an air compressor and maintains the system pressure at a high pressure, and by dedicating the pressurized air to the make-up water tank, it is possible to By equalizing the pressure of the auxiliary equipment cooling equipment and the pressure of the make-up water tank, it was possible to supply water to the high-pressure auxiliary equipment cooling equipment with a small amount of water pressure. 1 From this, this make-up water facility is characterized by having a structure in which water can be supplied by placing the make-up water tank at a higher level than the auxiliary cooling equipment and by installing a 1d low-pressure water supply pump.

[Embodiments of the invention]

An embodiment of the present invention will be explained below with reference to FIGS. 3 and 4.

FIG. 3 shows a make-up water system in which the make-up water tank is placed at a higher level than the pressure regulating tank, and water is supplied based on the water head difference.

The pressure regulating tank 17 is pressurized by the air compressor 13, IQflll!
7 valve 21, check valve 22, and piping 23, and depressurization is performed by air venting via electric valve 24 and piping 25, as in the conventional case.

Water is supplied to the pressure regulating tank 17 through a make-up water tank 26 and piping 27.
, ``Although this is done by an electric valve 29 and a check valve 30, the pressure regulating tank 1
Make sure that it can be pressurized to the same pressure as 7. The make-up water tank 26 is installed above the water level of the pressure regulating tank 17 so that a head difference A can be obtained. When make-up water is required due to a drop in the water head in the pressure regulating tank 17, the signal from the water level gauge 31 opens the make-up water line electric valve 29 and the air line electric valve 35, and the pressure regulating tank 17 and make-up water tank 26 are opened. After the pressures are balanced, water is supplied from the make-up water tank 26 to the pressure regulating tank 17 due to the head difference A. If the water level recovers, electric valves 29, 35
ff: Close to end supplementary water supply. The make-up water tank 26 is depressurized by an electric valve 32 and a vent pipe 33 during standby, and is normally returned to a low pressure.

According to this embodiment, make-up water to the high-pressure auxiliary equipment cooling equipment does not require a special high-pressure water supply source, and uses a low-pressure water supply source that is common equipment in the power plant, and the make-up water has a simple configuration consisting of valves and piping. Place the equipment so it can be done.

This has the effect of making operation and maintenance easier.

FIG. 4 shows another embodiment of the present invention, a make-up water system using a low-pressure make-up water pump.

The make-up water tank 26 is provided with a balance pipe 34 for pressurizing air, an electric valve 35, and a make-up water piping 27, a make-up water pump 28, an electric valve 29, and a check valve 30. Pressure regulating tank 1
7, when makeup water is required due to a drop in the water level, a signal from the water level gauge 31 opens the makeup water line electric valve 29 and the air line electric valve 35 to start the low-pressure water supply pump 28.
Make-up water is supplied from the make-up water tank 26 to the pressure regulating tank 17.

In this case, since there is no pressure difference between the make-up water tank 26 and the pressure regulating tank 17, the make-up water pump 28 only needs to overcome the resistance of the make-up water line, and a small low-pressure pump can be used.

According to example 2iIf1, it is possible to construct a make-up water device for high-pressure auxiliary equipment cooling equipment by using a general low-pressure water pump instead of using a special high-pressure make-up water device.

〔Effect of the invention〕

According to the present invention, rL is a special high-pressure water supply source as a make-up water system for high-pressure auxiliary equipment cooling equipment. Instead, the make-up water system can be configured with equipment such as valves and piping by using a low-pressure water supply source that is common to general power plant equipment, so the following effects can be achieved.

(1) The system configuration can be simplified, the space required for equipment arrangement is reduced, and the number of maintenance equipment is reduced.

(2) There is no need for a bird pressure water supply bong, which reduces equipment costs and improves reliability.

[Brief explanation of the drawing]

Figure 1 is a system configuration diagram of the pressureless auxiliary equipment cooling equipment, Figure 2 is a system configuration diagram around the pressure regulating tank including a conventional make-up water device, and Figures 3 and 4 are make-up water according to the present invention. FIG. 1 is a system configuration diagram of an embodiment of the apparatus. DESCRIPTION OF SYMBOLS 1... Residual heat removal heat exchanger, 3... Intermediate loop cooling pump, 5... Intermediate loop cooling heat exchanger, 7... Residual heat removal pump, 10... Seawater pump, 13...・Air compressor, 14...High pressure water supply device, 17...Pressure adjustment tank, 21.29.35...Bag excitation valve, 26...Makeup water tank, 28...Makeup water pump, 34 ...Balance tube. $ 1 Figure ￥ 2 eyes $ 3 Prisoner 4.8

Claims (1)

[Claims] 1. In high-pressure auxiliary equipment cooling equipment that cools the reactor water with a higher-pressure intermediate closed-loop cooling water system and eliminates the cause of leakage of radioactive liquid from the reactor side to the cooling water side, a suppressed closed-loop system is used. When supplying cooling water to the system, by providing piping and an electric valve to guide pressurized air, which is a high-pressure source, to the makeup water tank, it is possible to supply makeup water to the high-pressure system entirely from a low-pressure water source. Make-up water system for auxiliary equipment cooling equipment.