JPH0815475A - Nuclear reactor building - Google Patents

Abstract

PURPOSE:To expand the place of storage of spent fuel and to make effective use of a building space by a construction wherein a second spent fuel storing pool is formed above a reactor auxiliary machinery room and a wall having a notch and an overhead traveling crane are provided between this storing pool and the existing storing pool. CONSTITUTION:A second spent fuel storing pool 5 is provided above a reactor auxiliary machinery room 3 so that it is adjacent to a spend fuel storing pool 4 located on the uppermost story of a reactor room 2. A wall 6 is provided between the pools 4 and 5 and a notch through which fuel can be passed is formed in a part of this wall 6, while a slit which can be shifted vertically is provided for this notch. An operating floor 17 is formed above the pool 5, while a cask and spent fuel are brought in and out by a jib crane or a refueling machine through the intermediary of an overhead traveling crane 9, and thus effective use is facilitated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reactor building having a spent fuel storage pool formed above it.

[0002]

2. Description of the Related Art A conventional example of a nuclear reactor building will be described below with reference to FIG. 3 showing a conventional example of a nuclear reactor building and FIG. 4 showing a sectional view taken along the line AA of FIG. The reactor building 1 includes a reactor room 2 and a reactor auxiliary equipment room 3. The reactor room 2 is formed inside the reactor secondary shield, and includes a reactor pressure vessel 8 for containing nuclear fuel, a reactor containment vessel 10 for containing the reactor pressure vessel 8, and a reactor primary cooling system facility. Reactor equipment 11 such as. Further on the upper side, a spent fuel storage pool 4 for storing spent fuel, a temporary equipment pool 12 for temporarily placing reactor internal structures at the time of periodic inspection, and a pool 4 and 12 connected to the reactor pressure vessel 8 at the lower side. And passage 14,
A reactor well 13 is formed which communicates via 15.
In addition, the reactor auxiliary equipment room 3 is a secondary cooling facility required to operate the reactor facility 11 for the purpose of ensuring stability during an earthquake especially when the reactor needs to be installed in a high earthquake zone. It also houses power supply equipment such as emergency diesel generators and high-pressure core spray diesel generators (not shown), and reactor auxiliary equipment such as air conditioning equipment.

Reference numeral 9 in the figure denotes an overhead crane. Generally, a spent water storage pool 4 of a boiling water reactor (BWR) is installed on the uppermost floor of the reactor building in the reactor room 2. The spent fuel is taken out of the reactor pressure vessel 8 by a fuel exchanger (not shown) arranged above the spent fuel storage pool 4, carried to the spent fuel storage pool 4, and temporarily stored. To be done. The conventional spent fuel storage pool 4 cannot store the spent fuel of one plant 40 years, that is, about 10 times as many fuel assemblies that are normally loaded in the core. The structure is such that only about four times as many fuel assemblies loaded in the core can be stored. The remaining 26 years of spent fuel will either be added to the spent fuel storage building shared by multiple plants, or will be transported to a reprocessing facility for processing.

[0004]

Due to the limitation of the conventional storage capacity as described above, it is necessary to frequently transport the spent fuel to the reprocessing facility or to additionally install a spent fuel storage pool building. It was An object of the present invention is to obtain a nuclear reactor building capable of expanding the storage location of spent fuel and effectively utilizing the building space.

[0005]

In order to achieve the above object, the present invention according to claim 1 stores a reactor facility including a reactor pressure vessel and a reactor containment vessel and stores spent fuel above. And the reactor room that formed the spent fuel storage pool,
In a reactor building having a reactor auxiliary equipment room which is arranged around this reactor room and accommodates reactor auxiliary equipment, a second spent fuel storage pool is formed above the reactor auxiliary equipment room, A reactor building is provided in which the second spent fuel storage pool and the spent fuel storage pool are adjacent to each other through a wall, and the present invention according to claim 2 further provides the spent fuel storage pool. A wall provided between the second spent fuel storage pool and the second spent fuel storage pool is provided so as to be movable in the vertical direction, thereby providing a reactor building, and the present invention according to claim 3, The second spent fuel storage pool provides a reactor building characterized by constructing a spent fuel storage rack when necessary and using it as a spent fuel storage pool,
Further, in the present invention according to claim 4, an overhead crane is installed in a ceiling portion of the reactor building, and the overhead crane is installed in a range corresponding to a spent fuel storage pool installed in a reactor room. To provide a reactor building.

[0006]

According to the present invention having the above-mentioned structure, it is possible to store all the spent fuel generated at least during the operation period of the plant by expanding the spent fuel storage amount. In addition, it also becomes possible to store the spent fuel of other plants. Furthermore, since the storage of spent fuel occurs in stages due to regular replacement work, the unused portion of the expanded portion can be used for other purposes.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. In FIGS. 1 and 2, the same parts as those in FIGS. 3 and 4 are designated by the same reference numerals, and the description of the configuration will be omitted. As shown in the vertical cross-sectional view of the reactor building 16 of FIG. 1, one plant is located adjacent to the spent fuel storage pool 4 on the top floor of the reactor room 2 and above the reactor auxiliary equipment room 3.
A second spent fuel storage pool 5 capable of storing spent fuel for 26 years or more is provided.

A wall 6 is provided between the spent fuel storage pool 4 and the second spent fuel storage pool 5, and a cutout is formed in the wall 6 so that the fuel can pass therethrough. A slit 7 that can move up and down is provided in this cutout portion. An operating floor 17 is formed above the second fuel storage pool 5, and a jib crane (not shown) or a refueling machine is used for loading and unloading the cask and spent fuel through the overhead crane 9.

[0009] Therefore, as the capacity of the spent fuel storage pool increases and the spent fuel is carried in and out of the second spent fuel storage pool 5 by expanding the movable range of the conventional fuel exchanger, the overhead crane 9 is installed in the reactor. Since it is not necessary to expand to the auxiliary equipment room, and only the volumes of the second spent fuel storage pool 5 and its operating floor 17 are increased in comparison with the conventional example, the expansion of the building volume is slight. In addition, by storing the spent fuel building in the plant, it is possible to use the site effectively compared to constructing a separate building. By connecting the wall 6 to the upper part of the pool, the effect of restraining the spent fuel storage pool part is equivalent to the conventional one, and a sufficient building structure can be obtained.

Further, by disposing the slit 7, it is not necessary to use the spent fuel storage pool 4 and the second spent fuel storage pool 5 at the same time, and when the second spent fuel storage pool 5 is not used. For about 16 years, it will be possible to use it for other purposes such as temporary storage of cask or spent fuel storage rack without injecting pool water. Since the cask and spent fuel can be carried in and out by installing a jib crane, refueling machine, etc., there is no need for a space for moving the overhead crane above the second spent fuel pool, increasing the building volume. Can be small.

In the embodiment, the example in which the slit 7 is moved up and down is shown, but the same action and effect can be obtained by moving the wall 6 up and down. Furthermore, the wall 6
By moving, it is possible to move not only through the slit 7 but also freely in the pool, and it is possible to shorten the fuel moving time.

[0012]

According to the present invention, since the second spent fuel storage pool is installed above the reactor auxiliary equipment room, more spent fuel can be stored while minimizing the increase in the reactor building. be able to.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a reactor building according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line BB of FIG.

FIG. 3 is a vertical sectional view showing a conventional example of a reactor building.

FIG. 4 is a sectional view taken along the line AA of FIG. 3;

[Explanation of symbols]

1, 16 ... Reactor building 2 ... Reactor room 3 ... Reactor auxiliary equipment room 4 ... Spent fuel storage pool 5 ... Second spent fuel storage pool 6 ... Wall 7 ... Slit 8 ... Reactor pressure vessel 9 ... Ceiling Crane 10… Reactor containment vessel 11… Reactor facility 12… Temporary equipment pool 13… Reactor wells 14, 15… Passageway 17… Operating floor

Claims (4)

[Claims] 1. A reactor room having a spent fuel storage pool for storing spent fuel stored therein, which houses reactor equipment including a reactor pressure vessel and a reactor containment vessel, and a surrounding of the reactor room. In a reactor building having a reactor auxiliary equipment room that is arranged and stores a reactor auxiliary equipment, a second spent fuel storage pool is formed above the reactor auxiliary equipment room, and the second spent fuel storage is formed. The reactor building is characterized in that the pool and the spent fuel storage pool are adjacent to each other through a wall. 2. The atom according to claim 1, wherein a wall disposed between the spent fuel storage pool and the second spent fuel storage pool is disposed so as to be movable in the vertical direction. Furnace building. 3. The reactor building, wherein the second spent fuel storage pool according to claim 1 is used as a spent fuel storage pool by constructing a spent fuel storage rack when necessary. 4. An overhead crane is installed at the ceiling of the reactor building, and the overhead crane is installed in a range corresponding to the spent fuel storage pool installed in the reactor room. Item 1. The reactor building according to item 1.