JP2012202988A - New nuclear reactor building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To minimize damage to a nuclear reactor building due to an earthquake or a seismic sea wave, prevent a nuclear accident by sprinkling water over a nuclear reactor from the upper part of the building to cool the reactor, and avoid diffusion of radioactive matter to the outside.SOLUTION: A nuclear reactor building has a shape of a cylinder and is built under the ground. The upper part of the building has a cooling-water storage pool and the lower part of the building has an area for a reactor container to be installed. The cooling-water storage pool is integrated with the area for a reactor container. As a result, damage due to an earthquake or a seismic sea wave is minimized. Even when a power source or a facility of the building is out of order caused by damage due to an accident or other incidents, providing the cooling-water storage pool in the upper part of the nuclear reactor building enables the supply of cooling water by utilizing the difference in height between the cooling-water storage pool of the upper part of the building and the reactor container of the lower part of the building.

Description

Detailed Description of the Invention

(Application fields for industrialization)
With the conventional technology, cooling of the core and other parts of the Fukushima nuclear power plant was difficult due to the earthquake and tsunami. As a result, hydrogen was generated, causing an explosion, causing the reactor building to collapse and causing radioactive materials to diffuse. By constructing the reactor building in a cylindrical shape as a new means, it becomes possible to withstand the pressure on the surrounding outer wall caused by the earthquake, and by preventing the nuclear accident by sprinkling and cooling the reactor from the top of the building, The purpose is to prevent the diffusion of radioactive materials.
(Function)
By creating a space to store water in the upper part of the building and opening the valve, it is possible to cool the lower reactor and the interior of the building with water pressure without using machinery.

Effect of the invention

  Although it is difficult to construct a new nuclear power plant due to a radioactive material leakage accident, it can be safely used to construct and use a power plant safely.

1 Doorway 2 Manhole 3 Pool 4 Reactor containment location 5 Elevator space 6 Stairs 7 Equipment space 8 Reactor building enclosure 9 Ground

This is a method for cooling the reactor containment vessel. Even if the power supply is lost due to an accident or the water main is damaged, the cooling water is supplied from the emergency manhole to the cooling water storage pool at the top of the reactor building. Cooling method of sending cooling water to the reactor containment vessel and the spent nuclear fuel pool at the bottom of the reactor building using gravity as power.

The reactor containment cooling facility supplies cooling water by forced circulation by driving a pump or the like.

  JP 2004-198118 A

Reducing nuclear reactors due to an earthquake or tsunami that occurred at the Fukushima Daiichi NPS, causing a hydrogen explosion, causing the reactor building to collapse, and radioactive materials to diffuse. In addition, if the spent nuclear fuel pool installed in the reactor building cannot be cooled due to loss of power, etc., it will be a severe nuclear accident.

By making the reactor building into a cylindrical shape and constructing the cooling water storage pool at the top of the building, the reactor containment vessel at the bottom of the building, and the location of the spent nuclear fuel pool as a single unit, and building it underground, accidents due to earthquakes and tsunami Even if the power supply is lost or water mains are damaged and cannot be used, the cooling water is sent to the emergency manhole from the water truck or helicopter to the cooling water storage pool at the top of the building. Using the difference in height and using gravity as the motive force, the cooling water is sent to the reactor containment vessel and the spent nuclear fuel pool at the bottom of the building even for a long term, and the cooling is continued to prevent nuclear accidents and radioactive materials to the outside Prevent the spread of.

Although it is difficult to build a new nuclear power plant in the accidental spillage of radioactive material, to recover the equipment, etc. by continuing the cooling, the effect that can be used to build a at ease power plants can be safely cooling is there.

1 is a sectional view of a new reactor building according to the present invention.

The reactor building will be cylindrical, and the cooling water storage pool at the top of the building, the reactor containment vessel at the bottom of the building and the place where the spent nuclear fuel pool will be installed will be constructed in one piece and constructed underground. Even if an emergency manhole is installed at the top of the building and the power supply is lost or the water main is damaged and cannot be used, cooling water is sent from the water truck or helicopter to the emergency manhole to cool the top of the building. Cooling water is supplied to the water storage pool, and the cooling water is sent to the reactor containment vessel and the spent nuclear fuel pool at the bottom of the building using gravity as the power by using the height difference.

By installing the cooling water storage pool in the upper part of the reactor building and the reactor containment vessel in the lower part of the reactor building in one piece and constructing it underground, accidents due to earthquakes and tsunamis can be prevented to a minimum. If water is lost or water mains are damaged and cannot be used, cooling water is sent from a water truck or helicopter to an emergency manhole to supply cooling water to the cooling water storage pool at the top of the building, and power gravity As a long-term, the system will send cooling water to the reactor containment vessel and spent nuclear fuel pool at the bottom of the building and continue cooling to prevent nuclear accidents and prevent the spread of radioactive materials to the outside.

1. Ventilation opening 2. 2. Emergency manhole Doorway 4 Ground 5. Water supply main 6 6. Cooling water storage pool Opening 8. 8. Cooling water connection pipe Reactor building enclosure10 . Location of reactor containment vessel and spent nuclear fuel pool 11. Elevator space, staircase space, power generation equipment pipe space Underground doorway13 . 13. External drain / water supply pipes Pipe spaces and tunnels for power generation and facilities

Claims (2)

  A method of minimizing accidents caused by earthquakes and tsunamis by building a reactor building in a cylinder and building it underground.   Even if the equipment is damaged due to an accident, etc. by installing a cooling water storage pool in the upper part, it uses the effect of inertia to drop and spray the cooling water using the drop with the lower reactor building, A method to prevent nuclear accidents by cooling the reactor and preventing the diffusion of radioactive materials to the outside.

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