JP6008538B2 - Seawater supply equipment - Google Patents

Description

  The present invention relates to a seawater supply facility, and more particularly to a seawater supply facility that can cool a seawater pump.

  Plants such as nuclear power plants are equipped with seawater supply equipment for supplying seawater as cooling water in an emergency such as the occurrence of an earthquake disaster. Such a seawater supply facility has an intake channel that takes in seawater and a seawater pump that pumps seawater from the intake channel.

  In recent years, there has been a demand to tighten seawater supply facilities in order to suppress damage to seawater pumps caused by tsunamis and to suppress destruction of seawater pumps by terrorists and the like. Here, when the seawater supply facility is made robust, it is necessary to consider the cooling of the seawater pump.

JP 2001-116880 A

  Then, this invention is made | formed in view of the above, Comprising: It aims at providing the seawater supply equipment which can cool a seawater pump.

In order to achieve the above object, a seawater supply facility according to the present invention is a seawater supply facility comprising a water intake channel that takes in seawater and a seawater pump that pumps seawater from the water intake channel, and contains the seawater pump , Bei give a buried pump chamber in the ground with a closed structure, wherein the pump chamber, have a supply passage and an exhaust passage communicating the inside and outside of the pump chamber, the air supply passage in said pump chamber And an outlet portion of the air supply passage and an outlet portion of the exhaust passage extend from the pump chamber and protrude to a position higher than the Otsutsu seawater surface. And the inlet part of the said supply passage is arrange | positioned in the position lower than the outlet part of the said exhaust passage, It is characterized by the above-mentioned.

  In the seawater supply facility according to the present invention, the inlet portion of the exhaust passage is at a higher position than the outlet portion of the air supply passage, so that high-temperature air generated by the operation of the seawater pump flows out through the exhaust passage, Further, low temperature outside air is introduced into the pump chamber through the air supply passage. Accordingly, there is an advantage that the seawater pump is cooled by the natural circulation of the air in the pump chamber due to the temperature difference between the air in the pump chamber and the outside air.

FIG. 1 is a configuration diagram showing seawater supply equipment according to an embodiment of the present invention. FIG. 2 is an explanatory diagram showing a cooling structure of the pump chamber of the seawater supply facility shown in FIG. FIG. 3 is an explanatory view showing a first modification of the cooling structure for the pump chamber shown in FIG. FIG. 4 is an explanatory view showing Modification Example 2 of the cooling structure for the pump chamber shown in FIG. FIG. 5 is an explanatory view showing Modification 3 of the cooling structure for the pump chamber shown in FIG. FIG. 6 is an explanatory diagram showing an opening / closing device for the pump chamber of the seawater supply facility shown in FIG. 1.

  Hereinafter, the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments. Further, the constituent elements of this embodiment include those that can be replaced while maintaining the identity of the invention and that are obvious for replacement. In addition, a plurality of modifications described in this embodiment can be arbitrarily combined within a range obvious to those skilled in the art.

[Plant seawater supply equipment]
FIG. 1 is a configuration diagram showing seawater supply equipment according to an embodiment of the present invention. The figure schematically shows a seawater supply facility 1 installed on the coast.

  The seawater supply facility 1 is a facility for supplying seawater to a plant (not shown), and is used particularly as a facility for supplying seawater to a nuclear power plant. For example, in a nuclear power plant, seawater is supplied to a reactor auxiliary equipment cooling seawater facility via a seawater pipe and used as cooling water for facilities necessary for reactor cooling. In addition, there is a line for supplying seawater as cooling water in the event of an emergency such as an earthquake.

  The seawater supply facility 1 includes an intake channel 2 and a seawater pump 3. The intake channel 2 is a water channel (seawater pool) for taking in seawater. This intake channel 2 is formed in the underground of the land, and the intake pipe 21 is extended and arranged in the sea. The seawater pump 3 is a pump that sucks seawater from the intake channel 2 and is accommodated in the pump chamber 10. For example, in the configuration of FIG. 1, the seawater pump 3 is a vertical axial flow pump, and the two pumps 3 are arranged by inserting the water suction pipe 31 into the intake channel 2 under the floor of the pump chamber 10. Has been. In addition to the pump chamber 10, the seawater supply facility 1 includes a strainer chamber 11 that houses a strainer (not shown) and a management room 12 for a supervisor. The seawater pump 3 is not limited to the above-described vertical type pump, and may be a horizontal type pump (not shown).

  Here, the intake channel 2 has the intake port 22 in a position lower than the water level of the Tsutsunami seawater surface (see FIG. 1). The water level of the tsunami sea level is defined based on the level of the sea level during the tide of a tsunami of a predetermined scale. For example, in a nuclear power plant, the water level of the sea level at the time of the tide is calculated for the largest possible tsunami and the water level of the sea level is regulated. In addition, the water level of the Tsukuba seawater level is individually defined according to the design specifications and installation environment of the nuclear power plant.

  In this seawater supply facility 1, seawater flows into the intake channel 2 through the intake pipe 21 and is stored. And the seawater pump 3 sucks up this seawater from the waterway 2, and supplies it to the seawater pipe (illustration omitted) of a plant. At this time, since the intake port 22 of the intake channel 2 is at a position lower than the water level of the Tsutsunami seawater surface, the seawater is properly taken into the intake channel 2 from the intake port 22 and stored even during the pulling tsunami. Thereby, even when a tsunami occurs due to an earthquake disaster or the like, seawater to be supplied to the plant can be appropriately secured.

[Sturdy seawater pump room]
In recent plants, there is a demand for a robust pump room that houses seawater pumps as a countermeasure against tsunamis and terrorists in the event of an earthquake. In particular, nuclear power plants are required to appropriately secure and supply seawater as emergency cooling water.

  Therefore, the seawater supply facility 1 achieves robustness of the pump chamber 10 with the following configuration (see FIG. 1).

  First, as described above, the pump chamber 10 that houses the seawater pump 3 is provided, and the installation area of the seawater pump 3 is partitioned by the pump chamber 10 from the outside. For example, in the configuration of FIG. 1, the pump chamber 10 has a concrete ceiling, an inner wall, and a floor, and the intake channel 2 is formed below the pump chamber 10. The seawater pump 3 is fixedly installed on the floor of the pump chamber 10, and the water absorption pipe 31 is inserted into the water channel 2. Thereby, for example, even when a tsunami occurs, the seawater pump can absorb seawater without being swept away by the tsunami.

  The pump chamber 10 is buried in the land. For example, in the configuration of FIG. 1, most of the pump chamber 10 is embedded in the ground, and only the ceiling portion is exposed to the ground. A water supply line from the seawater pump 3 to the seawater pipe (not shown) of the plant is also buried in the ground. Thereby, the earthquake resistance and tsunami resistance of the pump chamber 10 are enhanced, and the seawater pump 3 and the water supply line are protected.

  In the configuration of FIG. 1, the ceiling of the pump chamber 10 is exposed to the ground as described above. However, the present invention is not limited to this, and the entire pump chamber 10 may be buried in the ground (not shown).

  In addition, the seawater supply facility 1 has a protective wall 4 installed so as to surround the pump chamber 10. This protective wall 4 has a wall height H1 higher than the water level of the Otsutsu seawater surface. The water level of the Oshitsunami sea level is defined based on the water level of the sea level during the tidal wave of a tsunami of a predetermined scale. For example, in a nuclear power plant, the sea level (tsunami height) at the time of the tidal tide is calculated for the largest possible tsunami and the water level of the sea level is regulated. In addition, the water level of the Oshitsunami sea level is individually defined according to the design specifications and installation environment of the nuclear power plant. For example, in the configuration of FIG. 1, the protection wall 4 is a concrete dike, and is disposed so as to surround the entire circumference of the portion of the pump chamber 10 exposed to the ground. As a result, when a tsunami occurs, the pump chamber 10 is protected from drifting objects and inundation, and terrorist acts aimed at destroying the pump chamber are prevented.

  In the configuration of FIG. 1, as described above, most of the pump chamber 10 is buried underground, and the protective wall 4 surrounds the portion exposed to the ground. However, the present invention is not limited to this, and the protective wall 4 can be disposed so as to surround the pump chamber 10 even in a configuration in which most of the pump chamber 10 is exposed to the ground.

  In addition, the seawater supply facility 1 opens and closes the first door 51 installed in the passage to the pump chamber 10, the second door 52 installed in the protective wall 4, and the first door 51 and the second door 52. And a control device (not shown) for controlling. Further, the control device prohibits an operation in which both the first door 51 and the second door 52 are opened. That is, in the control device, both the first door 51 and the second door 52 are closed, the first door 51 is opened and the second door 52 is closed, the first door 51 is closed and the second door is closed. The opening / closing operation of the first door 51 and the second door 52 is controlled to any one of the states in which 52 is opened. For example, in the configuration of FIG. 1, the second door 52 is disposed on the land-side wall surface of the protective wall 4 and is the only passage from the outside to the inside of the protective wall 4. Moreover, the 1st door 51 is arrange | positioned at the entrance of the management room 12, and becomes the only channel | path from the 1st door 51 to the inside of a management facility (the pump room 10, the strainer room 11, and the management room 12). The first door 51 and the second door 52 have electromagnetic door locks and are controlled by a control device (not shown) installed in the management room 12. Thereby, the situation where both the 1st door 51 and the 2nd door 52 will be in an open state is prevented, and it is comprised so that time may be required for the penetration | invasion from the outside into a management facility.

[Cooling structure of pump room]
In the seawater supply facility 1, the seawater pump 3 is accommodated in the pump chamber 10 as described above. On the other hand, when the seawater pump 3 is in operation, the temperature of the pump chamber 10 rises due to heat generated by a pump motor (not shown). For this reason, the seawater supply facility 1 has the following cooling structure in order to ventilate and cool the pump chamber 10.

  FIG. 2 is an explanatory diagram showing a cooling structure of the pump chamber of the seawater supply facility shown in FIG. The figure schematically shows the cooling structure of the pump chamber 10.

  In the configuration of FIG. 2, the pump chamber 10 has an air supply passage 61 and an exhaust passage 62 that communicate with the inside and outside of the pump chamber 10. The air supply passage 61 is a passage for introducing outside air into the pump chamber 10. The exhaust passage 62 is a passage for discharging the air in the pump chamber 10 to the outside. The air supply passage 61 and the exhaust passage 62 are constituted by, for example, a ventilation duct or a ventilation pipe. Further, the outlet 612 of the air supply passage 61 in the pump chamber 10 is installed in the vicinity of the heat generating part of the seawater pump 3. Specifically, the outlet portion 612 of the air supply passage 61 is located at a position where direct air can be applied to the heat generating portion of the seawater pump 3 while directing the blowing direction toward the heat generating portion (pump motor) of the seawater pump 3. Has been placed. As a result, the outside air is supplied to the motor (heat generating part) while being cold.

  Further, the inlet portion 621 of the exhaust passage 62 in the pump chamber 10 is located higher than the outlet portion 612 of the air supply passage 61 in the pump chamber 10. Further, the outlet portion 622 of the exhaust passage 62 in the pump chamber 10 is located higher than the inlet portion 611 of the air supply passage 61 in the pump chamber 10. Thereby, since the exhausted air rises without returning to the air supply port 611, a sound cooling effect is ensured.

  For example, in the configuration of FIG. 2, the pump chamber 10 is embedded in the ground. Further, the air supply passage 61 and the exhaust passage 62 are constituted by ventilation ducts that communicate the inside and outside of the pump chamber 10. The air supply passage 61 extends upward from the ceiling of the pump chamber 10 and protrudes to the ground, and has an opening (outside air inlet 611) in the ground protrusion. The air supply passage 61 extends downward from the ceiling of the pump chamber 10 and has an opening (outside air outlet 612) in the vicinity of the heat generating portion of the seawater pump 3. Further, the exhaust passage 62 has an opening (air inlet 621) in the ceiling of the pump chamber 10. The exhaust passage 62 extends upward from the ceiling of the pump chamber 10 and protrudes to the ground, and has an opening (air outlet 622) in the ground protrusion. Further, the inlet portion 611 of the air supply passage 61 outside the pump chamber 10 is arranged at a position lower than the outlet portion 622 of the exhaust passage 62 outside the pump chamber 10. The ground protruding portions of the air supply passage 61 and the exhaust passage 62 are respectively reinforced by being surrounded by a concrete and chimney-like reinforcing material 63.

  In the configuration of FIG. 2, when the seawater pump 3 is operated, the air that has become hot due to heat generated by the pump motor rises in the pump chamber 10. Then, since the inlet 621 of the exhaust passage 62 is located higher than the outlet 612 of the air supply passage 61, the air in the pump chamber 10 flows out through the exhaust passage 62. On the other hand, low temperature outside air is introduced into the pump chamber 10 through the air supply passage 61 having the outlet portion 612 at a low position. Thereby, the air in the pump chamber 10 is naturally circulated by the temperature difference between the air in the pump chamber 10 and the outside air, and the seawater pump 3 is cooled.

  2, (a) the height difference H2 between the heat generating part of the seawater pump 3 and the outlet part 622 of the exhaust passage 62 outside the pump chamber 10, or (b) the supply passage 61 and the exhaust passage 62. The amount of outside air supplied into the pump chamber 10 can be adjusted.

  In the configuration of FIG. 2, the pump chamber 10 preferably includes a plurality of inlet portions 611 and a plurality of outlet portions 622 (not shown). Thereby, total obstruction | occlusion of the entrance part 611 and the exit part 622 by a sea breeze and land wind can be prevented.

  In the configuration of FIG. 2, the main body of the pump chamber 10 has a hermetically sealed structure, and the inlet portion 611 of the air supply passage 61 and the outlet portion 622 of the exhaust passage 62 outside the pump chamber 10 are It is important to be in a position that is not flooded (for example, a position higher than the Otsutsu seawater surface) (not shown). For example, the inflow of seawater into the air supply passage 61 and the exhaust passage 62 can be suppressed by projecting the ground protruding portions of the air supply passage 61 and the exhaust passage 62 to a position higher than the Otsutsu seawater surface. Thereby, inundation to the pump chamber 10 at the time of tsunami generation is suppressed, and the cooling function of the pump chamber 10 is ensured appropriately.

  FIG. 3 is an explanatory view showing a first modification of the cooling structure for the pump chamber shown in FIG.

  In the configuration of FIG. 3, the pump chamber 10 includes a first fan 71 that supplies air to the pump chamber 10 and a second fan 72 that discharges air from the pump chamber 10.

  For example, in the configuration of FIG. 3, the pump chamber 10 is buried in the ground. Further, the seawater supply facility 1 includes an air conditioner room 70 outside the pump chamber 10, and accommodates two first fans 71 and two second fans 72 in the air conditioner room 70. The air conditioner room 70 may be provided in a building in a site surrounded by the protective wall 4 or may be buried in the ground like the pump room 10. The first fan 71 includes a duct 711 for taking in outside air and a duct 712 for sending outside air to the pump chamber 10. An air filter (not shown) for removing sea breeze salt and the like is installed on the duct 711 for taking in outside air. The second fan 72 has a duct 721 for taking in air in the pump chamber 10 and a duct 722 for discharging air to the outside.

  In the configuration of FIG. 3, when the first fan 71 and the second fan 72 are operated, low temperature outside air is supplied into the pump chamber 10, and high temperature air inside the pump chamber 10 is discharged to the outside. Thereby, the air in the pump chamber 10 circulates and the seawater pump 3 is cooled.

  In the configuration of FIG. 3, the first fan 71 and the second fan 72 are permanently installed in the air conditioning equipment room 70. However, for example, when the seawater supply facility 1 is used only in an emergency such as an earthquake disaster, the first fan 71 and the second fan 72 may be retrofitted and installed. In such a case, only one of the first fan 71 and the second fan 72 may be installed. Even with this configuration, the air in the pump chamber 10 can be circulated.

  In the configuration of FIG. 3, a cooling device (not shown) for cooling the air may be disposed on the ducts 711 and 712 of the first fan 71. Thereby, since the air supplied to the pump chamber 10 from the 1st fan 71 can be cooled, the seawater pump 3 can be cooled effectively. As such a cooling device, for example, a cooling coil that circulates seawater and cools air is assumed.

  In the configuration of FIG. 3, the main body of the pump chamber 10 has a sealed structure, and the first fan 71 and the second fan 72 are not flooded when a tsunami occurs (for example, a position higher than the Otsutsu seawater surface). ) Is preferable (not shown). Thereby, inundation to the pump chamber 10 at the time of tsunami generation is suppressed, and the cooling function of the pump chamber 10 is ensured appropriately. In addition, if the air conditioner room 70 is installed at an estimated tsunami height or higher, an operator or the like will come to the air conditioner room 70 when the first fan 71 and the second fan 72 are abnormal, and the first fan 71 and It is also possible to repair the second fan 72 and the like.

  FIGS. 4 and 5 are explanatory views showing modified examples 2 and 3 of the cooling structure for the pump chamber shown in FIG. In these drawings, FIG. 4 shows a case where a temporary fan 83 is used, and FIG. 5 shows a case where a permanent fan 84 is used.

  In the configuration of FIG. 4, the pump chamber 10 is provided with vent holes 81, 82 that communicate with the inside and outside of the pump chamber 10, opening / closing portions 811, 821 that open and close the vent holes 81, 82, and temporary installation used for ventilation of the pump chamber 10. And a fan 83.

  For example, in the configuration of FIG. 4, the pump chamber 10 is configured from a pump building installed on the ground. Further, the pump chamber 10 has a plurality of vent holes 81 and 82 that communicate with the inside and outside of the pump chamber 10. Moreover, these vent holes 81 and 82 have opening / closing doors (opening / closing portions 811 and 821), respectively.

  In the configuration of FIG. 4, when the seawater pump 3 is in operation (during normal operation or an accident), heat is radiated to the outside through the wall of the pump chamber 10 to cool the inside of the pump chamber 10 ( (See FIG. 4 (a)). When the worker enters the pump chamber 10, the opening / closing parts 811 and 821 are opened, and the temporary fan 83 is carried in and installed in the vent 82 (see FIG. 4B). And by driving the temporary fan 83, the pump chamber 10 is ventilated and the temperature of the pump chamber 10 is lowered. Thereafter, an operator enters the pump chamber 10 to perform inspection and work.

  In the configuration of FIG. 4, the temporary fan 83 is temporarily installed and used when an operator enters. However, the present invention is not limited to this, and the pump chamber 10 may have a permanent fan 84 as shown in FIG.

[Opening and closing device of pump room]
FIG. 6 is an explanatory diagram showing an opening / closing device for the pump chamber of the seawater supply facility shown in FIG. 1. The figure shows an opening / closing device 91 installed on the ceiling of the pump chamber 10.

  In the configuration of FIG. 6, the pump chamber 10 includes a vent 92 that communicates the inside and outside of the pump chamber 10, and an opening / closing device 91 that opens and closes the vent 92.

  For example, in the configuration of FIG. 6, the seawater pump 3 is accommodated in the pump chamber 10 as shown in FIG. 1. Moreover, the pump chamber 10 is buried in the ground and the ceiling portion protrudes above the ground. Moreover, since the main body of the pump chamber 10 has a sealed structure, water intrusion into the pump chamber 10 when a tsunami occurs is suppressed. On the other hand, when the seawater pump 3 is in operation, the temperature of the pump chamber 10 rises due to heat generated by a pump motor (not shown). For this reason, the pump chamber 10 has an opening / closing device 91 for ventilation on the ceiling.

  The opening / closing device 91 is an openable roof, and the vent 92 can be opened and closed by displacing the ceiling of the pump chamber 10. Specifically, the opening / closing device 91 includes a roof 911 that constitutes a ceiling portion of the pump chamber 10, a support leg 912 that supports the roof 911 from below, and a bumper 913 that supports the support leg 912 from the horizontal direction. The air jack 914 moves the support leg 912 forward and backward in the vertical direction, and the pedestal 915 supports the air jack 914. Further, when the control device (not shown) of the management room 12 turns on / off the air supply to the air jack 914 to expand / shrink the air jack 914, the support leg 912 moves forward and backward in the vertical direction, and the roof 911 is opened and closed.

  In the configuration of FIG. 6, when the pump chamber 10 is sealed, the opening / closing device 91 is in a closed state, and the vent 92 is closed (see FIG. 6A). Specifically, the air from the air jack 914 is removed, the roof 911 is lowered, and the vent 92 between the roof 911 and the side wall of the pump chamber 10 is sealed. Thereby, inundation into the pump chamber 10 is suppressed. For example, when the measured value (seawater level) by a tide gauge (not shown) is greater than or equal to a predetermined value, when a tsunami warning is issued, when the seawater pump 3 is stopped, the opening / closing device 91 is closed and the pump chamber 10 is closed. Sealed.

  On the other hand, when the pump chamber 10 is ventilated, the opening / closing device 91 is in an open state, the vent 92 is provided, and the inside and outside of the pump chamber 10 communicate with each other (see FIG. 6B). Specifically, air is supplied to the air jack 914 to raise the roof 911, and a vent 92 is formed between the roof 911 and the side wall of the pump chamber 10. Thereby, the pump chamber 10 is ventilated through the vent 92. For example, when the seawater pump 3 is in operation, the opening / closing device 91 is opened to ventilate and cool the pump chamber 10.

  In the configuration of FIG. 6, as described above, the opening / closing device 91 is an openable roof and is installed on the ceiling of the pump chamber 10. Such a configuration is preferable in that the exhaust heat effect of the pump chamber 10 is high, and the switch device 91 can be easily installed in the configuration in which the pump chamber 10 is embedded in the ground and the ceiling portion protrudes to the ground. However, the present invention is not limited to this, and the opening / closing device 91 may be disposed, for example, on the side wall of the pump chamber 10 (not shown).

[effect]
As described above, the seawater supply facility 1 includes the intake channel 2 for taking in seawater and the seawater pump 3 for pumping seawater from the intake channel 2 (see FIG. 1). The seawater supply facility 1 also includes a pump chamber 10 that houses the seawater pump 3. Further, the pump chamber 10 has an air supply passage 61 and an exhaust passage 62 that communicate between the inside and the outside of the pump chamber 10 (see FIG. 2). Further, the outlet 612 of the air supply passage 61 in the pump chamber 10 is installed in the vicinity of the heat generating part of the seawater pump 3.

  Further, the inlet portion 621 of the exhaust passage 62 in the pump chamber 10 is located higher than the outlet portion 612 of the air supply passage 61 in the pump chamber 10. Further, the outlet portion 622 of the exhaust passage 62 in the pump chamber 10 is located higher than the inlet portion 611 of the air supply passage 61 in the pump chamber 10.

  In such a configuration, since the inlet portion 621 of the exhaust passage 62 is higher than the outlet portion 612 of the air supply passage 61, high-temperature air generated by the operation of the seawater pump 3 flows out through the exhaust passage 62. Moreover, low temperature outside air is introduced into the pump chamber 10 through the air supply passage 61. Then, the air in the pump chamber 10 naturally circulates due to the temperature difference between the air in the pump chamber 10 and the outside air. Thereby, there exists an advantage by which the seawater pump 3 is cooled. Moreover, since the seawater pump 3 can be cooled by natural circulation of air, for example, there is an advantage that it is not necessary to install a safety dynamic device.

  In the seawater supply facility 1, the pump chamber 10 includes a first fan 71 that supplies outside air to the pump chamber 10 and a second fan 72 that discharges air in the pump chamber 10 (see FIG. 3).

  In such a configuration, when the first fan 71 and the second fan 72 are operated, low temperature outside air is supplied into the pump chamber 10, and high temperature air inside the pump chamber 10 is discharged to the outside. Thereby, there exists an advantage by which the air in the pump chamber 10 circulates and the seawater pump 3 is cooled.

  Further, in this seawater supply facility 1, the pump chamber 10 has vent holes 81, 82 that communicate the inside and outside of the pump chamber 10, opening / closing parts 811, 821 that open and close the vent holes 81, 82, and ventilation of the pump chamber 10. And temporary or permanent fans 83 and 84 used for the above (see FIGS. 4 and 5).

  In such a configuration, when the seawater pump 3 is in operation (during normal operation or accident), heat is radiated to the outside through the wall of the pump chamber 10 to cool the inside of the pump chamber 10 (FIG. 4 ( a) and FIG. 5 (a)). When an operator enters the pump chamber 10, the opening / closing sections 811 and 821 are opened, and the fans 83 and 84 are driven to ventilate the pump chamber 10 (FIGS. 4B and 5B). reference). Thus, there is an advantage that the pump chamber 10 and the seawater pump 3 can be cooled.

  In the seawater supply facility 1, the pump chamber 10 includes a vent 92 that communicates the inside and outside of the pump chamber 10, and an opening / closing device 91 that opens and closes the vent 92 (see FIG. 6).

  In such a configuration, when the pump chamber 10 is sealed, the opening / closing device 91 is in the closed state, and the vent 92 is closed (see FIG. 6A). Thereby, inundation into the pump chamber 10 is suppressed. On the other hand, when the pump chamber 10 is ventilated, the opening / closing device 91 is in an open state, the vent 92 is provided, and the inside and outside of the pump chamber 10 communicate with each other (see FIG. 6B). Thereby, the pump chamber 10 is ventilated through the vent 92. Thereby, there exists an advantage which can implement | achieve watertight and ventilation of the pump chamber 10. FIG.

  Further, in the seawater supply facility 1, the opening / closing device 91 includes an opening / closing body (roof 911) that closes the vent 92 and an air jack 914 that drives the opening / closing body (see FIG. 6). Thereby, there exists an advantage which can comprise the opening / closing apparatus 91 easily.

  The seawater supply facility 1 includes an intake channel 2 for taking in seawater and a seawater pump for pumping seawater from the intake channel 2 (see FIG. 1). Further, the intake channel 2 has an intake port 22 at a position lower than the water level of the tsunami sea level defined with reference to the water level of the sea level during the tide of a tsunami of a predetermined scale.

  In such a configuration, the intake port 22 of the intake channel 2 is located at a position lower than the water level of the Tsutsunami seawater surface, so that the seawater is appropriately taken into the intake channel 2 from the intake port 22 and stored even during the pulling tsunami. Thereby, even when a tsunami occurs due to an earthquake disaster or the like, there is an advantage that seawater to be supplied to the plant can be appropriately secured. For example, if the water intake is at a position higher than the water level of the tsunami seawater surface, seawater in the intake channel may be sucked up by the seawater pump and depleted even for a short time during the tsunami.

  The seawater supply facility 1 includes a pump chamber 10 that houses the seawater pump 3 and a protective wall 4 that surrounds the pump chamber 10 (see FIG. 1). Further, the protective wall 4 has a wall height H1 that is higher than the water level of the Otsutsu seawater surface defined on the basis of the water level of the seawater surface during the tide of a tsunami of a predetermined scale.

  In this configuration, the protective wall 4 surrounding the pump chamber 10 is arranged in this manner, so that the pump chamber 10 is protected from drifting objects and water inundation in the event of a tsunami, and terrorist acts intended to destroy the pump chamber Has the advantage of being prevented.

  The seawater supply facility 1 includes a first door 51 installed in a passage to the pump chamber 10, a second door 52 installed in the protective wall 4, and the first door 51 and the second door 52. And a control device (not shown) for controlling the opening / closing operation (see FIG. 1). Further, the control device prohibits an operation in which both the first door 51 and the second door 52 are opened. Thereby, the situation where both the 1st door 51 and the 2nd door 52 will be in an open state is prevented, and there exists an advantage which can be comprised so that time may be required for the penetration | invasion from the outside into a management facility.

  The seawater supply facility 1 includes a pump chamber 10 that houses the seawater pump 3 (see FIG. 1). Moreover, the pump chamber 10 is buried in the ground. Thereby, there exists an advantage which the earthquake resistance of the pump chamber 10 improves.

  DESCRIPTION OF SYMBOLS 1 Seawater supply equipment, 2 intake channel, 21 intake pipe, 22 intake port, 3 seawater pump, 31 intake pipe, 4 protection wall, 51 1st door, 52 2nd door, 61 Air supply path, 611 inlet part, 612 outlet , 62 Exhaust passage, 621 Inlet part, 622 Outlet part, 63 Reinforcing material, 70 Air conditioning equipment room, 71 First fan, 711, 712 Duct, 72 Second fan, 721, 722 Duct, 81, 82 Vent, 811 , 821 Opening and closing part, 83 Temporary fan, 84 Permanent fan, 91 Opening and closing device, 911 Roof, 912 Support leg, 913 Bumper, 914 Air jack, 915 Base part, 92 Vent, 10 Pump room, 11 Strainer room, 12 Management Room

Claims (4)

A seawater supply facility comprising an intake channel for taking in seawater and a seawater pump for drawing seawater from the intake channel,
Accommodates the seawater pump, Bei example a pump chamber which is buried in the ground with a closed structure,
Said pump chamber, have a supply passage and an exhaust passage communicating the inside and outside of the pump chamber,
The outlet of the air supply passage in the pump chamber is installed in the vicinity of the heat generating part of the seawater pump ,
The inlet portion of the air supply passage and the outlet portion of the exhaust passage protrude from the pump chamber to a position higher than the Otsutsu seawater surface, and
The seawater supply facility , wherein an inlet portion of the air supply passage is disposed at a position lower than an outlet portion of the exhaust passage . The seawater supply facility according to claim 1, wherein the intake channel has a water intake at a position lower than the water level of the sea surface of the tsunami sea surface defined with reference to the water level of the sea surface during the tide of a tsunami of a predetermined scale. For example Bei an anti-Mamorukabe surrounding the pump chamber, and,
3. The seawater supply facility according to claim 1 , wherein the protective wall has a wall height higher than a water level of the Otsutsu seawater surface defined with reference to a water level of the seawater surface during a tidal wave of a tsunami of a predetermined scale.   The seawater supply facility according to any one of claims 1 to 3, wherein the ground protruding portions of the air supply passage and the exhaust passage are reinforced by being surrounded by a chimney-shaped reinforcing material.

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