JP2883938B2 - ▲ high ▼ stand type nuclear power plant - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a hillside type nuclear power plant, and particularly to an area where there is a high demand for nature maintenance such as coastline protection or an area where a tsunami is expected. The present invention relates to a means for securing cooling water for a circulating water system and an auxiliary cooling system of a nuclear power plant on a hill.

[Prior Art] Conventional nuclear power plants in Japan require seawater as a cooling source for a circulating water system and an auxiliary cooling system, and are therefore installed on coastlines.

FIG. 3 is an elevation view (A) and a plan view (B) schematically showing a system configuration of a circulating water system and an auxiliary cooling system of a conventional typical nuclear power plant installed on the shore. The circulating water system is indicated by a solid line, and the auxiliary cooling system is indicated by a broken line.

In the circulating water system of the condenser cooling water, circulating water taken from seawater by the circulating water pump 1 is guided to the circulating water pipe 2 and supplied to the turbine building 3 as cooling water for the condenser 4. The circulating water heat-exchanged in the condenser 4 is guided to the circulating water pipe 2 and passes through a ball collector pit and a water discharging pit 5 for collecting balls used for preventing adhesion of shellfish and the like.
It is discharged into the sea again.

On the other hand, in the ordinary and emergency auxiliary equipment cooling system, the auxiliary equipment cooling water taken from the sea by the auxiliary equipment cooling water pump 6 is guided to the auxiliary equipment cooling water pipe 7, and is used as cooling water for the ordinary and emergency auxiliary equipment. It is supplied to the reactor building 8. The auxiliary equipment cooling water that has exchanged heat with the auxiliary equipment cooling system is guided to the auxiliary equipment cooling water pipe 7 and discharged to the sea together with the circulating water.

The seismic design conditions for the circulating water system and the auxiliary cooling system described above are based on the "Non-Electric Power Plant Seismic Design Technical Guidelines" (JEAG4601, Supplement -1984).
It is required to design a seismic class C and to design an auxiliary class cooling system for the auxiliary equipment cooling system, which includes emergency auxiliary equipment cooling. Therefore, the auxiliary cooling system requires a solid structure supported by rock or rock support.

[Problems to be Solved by the Invention] When a nuclear power plant is installed in an area where protection of the coastline such as a natural park or maintenance of the natural landscape from the sea side or an area where severe tsunami countermeasures are required, It is becoming increasingly difficult to install near the coastline.

In order to solve this problem, it is conceivable to install it on the mountain side away from the coastline.

However, when the above-mentioned conventional technology is applied to a hill-located nuclear power plant as it is, the following two points are technical problems.

A. At a hill location, the required head of the circulating water pump 1 is increased, and power consumption for power generation is increased. Therefore, the operating cost of the nuclear power plant increases.

B. At a hill location, the nuclear power plant is far from the shore, so if the cooling water for the auxiliary cooling system is demanded from seawater as before, the intake channel for the auxiliary cooling water will be longer, satisfying the seismic class As It becomes difficult to provide an intake channel.

SUMMARY OF THE INVENTION An object of the present invention is to provide a hillside nuclear power plant that suppresses an increase in operating costs due to a hillside location and overcomes the difficulty of intake of an auxiliary cooling system due to separation from the sea.

[Means for Solving the Problems] The present invention employs the following technical means to achieve the above object.

A. First, in order to suppress the increase in operating costs due to the location of the hill, it is necessary to recover the power consumed for pumping the circulating water to the hill using a circulating water pump.

Thus, in the present invention, a water turbine is installed in a drainage channel of a circulating water system, and when draining circulating water to the sea, hydroelectric power generation is performed using a height difference between a location point of a nuclear power plant and the sea surface to reduce power consumption. I decided to collect it.

B. Next, in order to overcome the difficulty of water intake of the auxiliary cooling system due to the separation between the location and the sea, it is conceivable that the cooling source of the auxiliary cooling system is not required to be seawater.

In the present invention, either a cooling tower is installed near a nuclear power plant and air is cooled, or an artificial lake that satisfies the cooling capacity of an auxiliary cooling system is installed near a nuclear power plant. I made it.

[Operation] In the present invention, since a water turbine is installed in the circulating water drainage channel to perform hydroelectric power generation, power consumption for pumping circulating water to a hill with a circulating water pump can be recovered, and the circulating water is located on a hill remote from the sea. This can suppress an increase in operating costs of the nuclear power plant.

In addition, the auxiliary equipment cooling system is air-cooled by a cooling tower installed near the nuclear power plant, or the auxiliary equipment cooling system is cooled by cooling water from an artificial lake installed near the nuclear power plant. This eliminates the need for auxiliary equipment cooling system piping that had to be routed long from the sea while satisfying the above conditions.

Therefore, it is possible to obtain a hillside-type nuclear power plant that suppresses an increase in operating costs and overcomes difficulties in planning the intake of the auxiliary cooling system.

The method of installing a cooling tower requires less space than the case of installing an artificial lake, and is preferable from the viewpoints of earthquake resistance, economy, and ease of construction.

Embodiment Next, an embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG.

FIG. 1 is an elevational view (A) and a plan view (B) schematically showing a system configuration of a circulating water system and an auxiliary cooling system of a hillside type nuclear power plant according to the present invention, and FIG. 2 is an embodiment of FIG. It is a figure which shows the position from the sea surface of the equipment which comprises the circulating water system of FIG. Also in this case, the circulating water system is shown by a solid line, and the auxiliary cooling system is shown by a broken line.

The circulating water system exchanges heat with a circulating water pump 1 for pumping seawater as a circulating water system, a circulating water pipe 2 for guiding the circulating water, and a circulating water disposed in the turbine building 3 and guided by the circulating water pipe 2. A condenser 4, a water tank 9 for taking and storing circulating water after heat exchange through a ball collector pit and a water discharge pit 5, and a water turbine 10 for generating hydroelectric power by circulating water from the water tank 9. Consists of

On the other hand, the auxiliary equipment cooling system includes an auxiliary equipment cooling water pipe 7 that guides auxiliary equipment cooling water for cooling ordinary and emergency auxiliary equipment (not shown) disposed in the reactor building 8, and a vicinity of the reactor building 8. And a cooling tower 11 installed in the cooling tower for cooling auxiliary equipment cooling water.

FIG. 2 illustrates that the power of the circulating water can be recovered by configuring the circulating water system in this manner. The circulating water pumped up to a hill by the circulating water pump 1 from the sea surface is guided to the condenser 4. In the present embodiment, the circulating water system pipe 2 is a siphon pipe which forms the highest part of the pipe by the inlet pipe and the outlet pipe of the condenser 4, and operates the circulating water in a siphon operation. After the heat exchange by the condenser 4, the circulating water is pooled in the water tank 9. The height difference between the water surface of the water tank 9 and the sea surface is used for hydraulic power generation by the water turbine 10 as circulating water recovery power.

When there is a swamp or a reservoir near the nuclear power plant, the water can be guided to the water tank 9 and used for hydroelectric power generation.

On the other hand, if the auxiliary equipment cooling system is configured as shown in FIG. 1, the auxiliary equipment cooling water can be cooled by circulating between the cooling tower 11 and auxiliary equipment (not shown) in the reactor building 8 as in the related art. There is no need to ask for water from seawater.

Although not shown here, the cooling tower
Instead of 11, it is also possible to provide an artificial lake 12 near the reactor building 8 and use that water as auxiliary equipment cooling water. Also in this case, it is not necessary to route long piping from the sea for the auxiliary equipment cooling system, and it becomes easy to satisfy the earthquake resistance class As.

[Effects of the Invention] According to the present invention, a water turbine is installed in a circulating water drainage channel to perform hydroelectric power generation, and power consumption for pumping circulating water to a hill with a circulating water pump can be recovered. An increase in operating costs of the nuclear power plant due to the location can be suppressed.

In addition, the cooling system for auxiliary equipment is cooled by air using a cooling tower installed near the nuclear power plant, or the cooling system for auxiliary equipment is cooled by cooling water from an artificial lake installed near the nuclear power plant, thereby achieving an earthquake-resistant class As. This eliminates the need for auxiliary equipment cooling system piping that had to be routed long from the sea while satisfying the above conditions.

Therefore, it is possible to obtain a hillside-type nuclear power plant that suppresses the increase in operating costs and overcomes the difficulties in planning the intake of auxiliary equipment cooling systems, and in areas where it is necessary to maintain natural scenery such as coastline protection and strict tsunami countermeasures. Can be expanded to the inland side even in areas that require

[Brief description of the drawings]

FIG. 1 is an elevation view (A) and a plan view (B) schematically showing a system configuration of a circulating water system and an auxiliary cooling system of a hillside nuclear power plant according to the present invention, and FIG. 2 is an hillside nuclear power plant. Figure 3 shows the location of the facilities that make up the circulating water system of the plant from the sea surface, and FIG. 3 shows an outline of the system configuration of the circulating water system and the auxiliary cooling system of a conventional typical nuclear power plant installed on the shore. It is an elevation view (A) and a plan view (B). DESCRIPTION OF SYMBOLS 1 ... Circulating water pump, 2 ... Circulating water piping, 3 ... Turbine building, 4 ... Condenser, 5 ... Ball collector pit and water discharge pit, 6 ... Auxiliary cooling water pump, 7 ... Auxiliary cooling water piping, 8
... reactor building, 9 ... water tank, 10 ... water turbine, 11 ... cooling tower, 12 ... artificial lake.

──────────────────────────────────────────────────続 き Continuation of front page (72) Inventor Kanehiro Ochiai 3-1-1 Sachimachi, Hitachi City, Ibaraki Pref. Hitachi, Ltd. Hitachi Plant (56) References JP-A-3-188395 (JP, A) JP-A-2-85795 (JP, A) MERZ, GF, "Use of cooling ponds and hydracular turbines to save SRP energy consumption", US DOE REP. , DPST-79-531 p23 (1980) (58) Fields investigated (Int. Cl. ⁶ , DB name) G21C 1/00 G21C 15/00 G21D 1/00

Claims (3)

(57) [Claims] 1. A hillside type nuclear power plant that seeks a circulator cooling water source from the sea, comprising: a water storage tank disposed at a height close to a hill reactor for pooling circulating water discharged from the nuclear reactor; A water turbine that is disposed in the water tank and performs a hydroelectric power generation by using the circulating water by using a height difference between a water surface of the water storage tank and a sea surface. 2. The nuclear power plant according to claim 1, wherein a cooling tower for supplying cooling water to service and emergency auxiliary equipment of the nuclear reactor is provided in proximity to the nuclear reactor. Hill-based nuclear power plant 3. The hillside type nuclear power plant according to claim 1, wherein an artificial lake for supplying cooling water to service and emergency auxiliary equipment of said reactor is provided in proximity to said reactor. A hill location type nuclear power plant.