JPH05100082A - Spent fuel storage facility - Google Patents

Abstract

PURPOSE:To provide a spent fuel storage facility easily shrinking a nuclear reactor building and increasing the capacity of spent fuel storage pools without restricting the plane size of the nuclear reactor building by installing separate spent fuel storage pools in a building adjacent to the nuclear reactor building in addition to spent fuel storage pools in the existing nuclear reactor building, and connecting both spent fuel storage pools with an indoor transportation path of the spent fuel. CONSTITUTION:A spent fuel storage facility installed in a nuclear power plant and storing and cooling the spent fuel has spent fuel storage pools 25, 26 and a spent fuel conveying facility installed outside a nuclear reactor storage container 2 in a nuclear reactor building 1 storing a nuclear reactor, a building installed adjacently to the nuclear reactor building 1 and provided with spent fuel storage pools 25, 26 and a spent fuel conveying facility, and spent fuel indoor transportation paths of both buildings inside and outside this building and the nuclear reactor building 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spent fuel storage facility installed in a nuclear power plant.

[0002]

2. Description of the Related Art As for a conventional spent fuel storage facility in a nuclear power plant, as shown in the longitudinal sectional view of the reactor building in FIG. A spent fuel storage pool 3 is installed adjacent to it.

In this spent fuel storage pool 3, the reactor 4
The spent fuel 6 taken out by the fuel exchanger 5 is stored to cool the decay heat. This spent fuel storage pool 3
In the cask pit, the spent fuel 6 that has been stored for a certain period of time or more in the cask 7 is mounted on the cask 7 and loaded on the transportation vehicle 10 via the hatch 9 via the hatch 9. Be transported to the outside of. The spent fuel 6 stored in the cask 7 is transported to a spent fuel storage facility or a reprocessing facility outside the nuclear power plant by a transportation vehicle 10 or a ship.

[0004]

The required space for the spent fuel storage pool 3 installed inside the conventional reactor building 1 has been one of the major conditions for determining the plane dimensions of the reactor building 1. Therefore, it has been a great constraint when planning the downsizing of the reactor building 1 and the large capacity of the spent fuel storage pool 3.

The object of the present invention is to install a separate spent fuel storage pool in the building adjacent to the reactor building in addition to the conventional spent fuel storage pool in the reactor building. By connecting the spent fuel storage pools with an indoor transportation route for spent fuel, the size of the reactor building can be reduced and the capacity of the spent fuel storage pool can be easily increased without restricting the plane dimensions of the reactor building. To provide spent fuel storage facilities.

[0006]

[MEANS FOR SOLVING THE PROBLEMS] In a spent fuel storage facility for storing and cooling spent fuel installed in a nuclear power plant, the reactor is housed inside a reactor building outside the reactor containment vessel. The spent fuel storage pool and spent fuel transfer facility installed, the building with the spent fuel storage pool and spent fuel transfer facility installed adjacent to this reactor building, this building and the reactor building It will have an indoor transportation route for spent fuel in both buildings inside and outside the building.

[0007]

[Operation] Spent fuel storage can be freely selected in the spent fuel storage pool in the reactor building or in the spent fuel storage pool in another building, the fuel storage pool building, and its transportation It can be easily done by the indoor transportation route installed between the buildings. Therefore, even if the capacity of the spent fuel storage pool in the reactor building is insufficient, no problem will occur. In addition, the increase in the capacity of the spent fuel storage pool in the fuel storage pool building can be easily dealt with because it is a separate building from the reactor building.

Further, since the fuel storage pool building is adjacent to the reactor building, the capacity of the spent fuel storage pool in the reactor building can be reduced irrespective of the required storage capacity of the entire plant. , The reactor building can be downsized and the earthquake resistance can be improved, and the degree of freedom in design can be increased and the safety can be improved.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. It should be noted that the same components as those of the above-described conventional technique are denoted by the same reference numerals and detailed description thereof will be omitted. 1 is a plan sectional view of a reactor building and an adjacent fuel storage pool building interior, and FIG. 2 is a sectional view taken along the line AA of FIG.

The reactor building 1 has a reactor containment vessel 2 in the center.
A spent fuel storage pool 3 is installed adjacent to this, and a fuel exchanger 5 is provided. Further, in the spent fuel storage pool 3, the cask pit 22 for mounting the spent fuel 6 on the building transfer cask 21 and the building transfer cask 21.
A hatch 23 for carrying out 21 to the outside of the reactor building 1 and a carry-in / out building which is an indoor transportation path communicating with this hatch 23.
24 are provided. An overhead crane 8 is installed on the ceiling for transporting the building transfer cask 21.

Adjacent to the corners of the reactor building 1,
In addition, a fuel storage pool building 20 independent of the reactor building 1 is installed near the loading / unloading building 24. Inside the fuel storage pool building 20, two spent fuel storage pools 25,
26 and cask pits 27 and 28 for mounting the spent fuel 6 on the cask 7 adjacent to 26 and the fuel storage pool building
20 and a transfer cask inside the fuel storage pool building that communicates with the loading / unloading building 24 of the reactor building 1 through an isolation door (not shown)
An entrance / exit path 29, which is an indoor transportation path for carrying in 21, and an entrance / exit opening 11 for carrying out the cask 7 to the outside of the fuel storage pool building 20 are provided. On the ceiling, there are a transfer cask 21 inside the building and an overhead crane 30 for carrying the cask 7.
The refueling machine 5 is installed in the spent fuel storage pools 25 and 26.

Further, the carry-in / carry-out building 24 of the reactor building 1
And a rail connecting the loading / unloading path 29 of the fuel storage pool building 20.
31 is laid, and a transfer carriage 32 for loading the transfer cask 21 in the building is provided. Next, the operation of the above configuration will be described.

The spent fuel 6 taken out from the nuclear reactor by the fuel exchanger 5 is stored in the spent fuel storage pool 3 of the reactor building 1 to cool the decay heat as in the conventional case.
Part of the spent fuel 6 is mounted on the transfer cask 21 inside the building in the cask pit 22 and hatched by the overhead crane 8.
Lower the inside of 23 and load it onto the transfer cart 32.

The transfer carriage 32 loaded with the transfer cask 21 inside the building travels on the rails 31 and stores fuel from the reactor building 1 via the carry-in / carry-out building 24 and the carry-in / carry-out path 29 of the fuel storage pool building 20. Move into pool building 20 and use overhead crane 30
It is lifted by and is inserted into the cask pits 27 and 28. After that, the spent fuel 6 is discharged from the building transfer cask 21 by the refueling machine 5 and the spent fuel storage pool 2
Stored at 5, 26.

Further, when transferring the transfer cask 21 inside the building, the reactor building 1 and the carry-in / out entrance building 24, and the boundary between the carry-in / out entrance building 24 and the carry-in / out path 29 in the fuel storage pool building 20 are not shown. The isolation door, and further, the doors of the carry-in / out port 11 of the reactor building 1 and the fuel storage pool building 20 in which the spent fuel storage pools 25 and 26 are installed are all opened at the same time, or the mutual atmosphere is exchanged, or , The interlock control is performed so as not to affect the fluctuation of the pressure in the building, and especially the fuel storage pool building 20 in which the spent fuel storage pools 25 and 26 are installed does not become a secondary storage facility. ..

If necessary, the spent fuel 6 is temporarily stored in the spent fuel storage pool 3 of the reactor building 1 and then stored in the spent fuel storage pools 25 and 26 in the fuel storage pool building 20. It may be relocated and stored. In addition, the carry-in / out port 11 of the reactor building 1 and the fuel storage pool building 20 is used to transfer the spent fuel 6 stored in the cask 7 to a spent fuel storage facility or a reprocessing facility by a transportation vehicle 10 or the like. It can be used for unloading as needed or for loading empty cask 7, and for unloading solid cask 7 and empty cask 7.
It is also possible to improve work efficiency by specializing in carrying in.

According to this embodiment, since the spent fuel 6 can be transferred by using the conventional equipment in the reactor building 1 as it is, the capacity of the spent fuel storage equipment can be expanded with a minimum design change. it can.

Of course, if the present invention is adopted at the beginning of designing a nuclear power plant, the reduction of the reactor building and the increase in the capacity of the spent fuel storage pool, which are the objects of the invention, can be easily achieved.

FIG. 3 is a side sectional view of a reactor building and an adjacent fuel storage pool building according to another embodiment of the present invention, the main structure of which is the same as that of the embodiment shown in FIGS. There is a spent fuel storage pool adjacent to the reactor building 1.
The main control room 34 is located on the upper floor of the fuel storage pool building 33 equipped with 25 and 26.
Class Spent Fuel Storage Pools 25 and 26 and Central Control Room
34 can be installed in the same fuel storage pool building 33 to achieve seismic cooperation, and the site of the fuel storage pool building 33 can be saved.
Further, the construction cost of the entire plant including the fuel storage pool building 33 can be reduced.

FIG. 4 is a plan sectional view of a reactor building and a fuel storage pool building showing another embodiment. Two reactor buildings 1 and 35 are separated from each other and are adjacent to each other. In addition, the fuel storage pool building 20 in which the two spent fuel storage pools 25, 26, etc. are installed is provided, and the reactor building 1, the reactor building 35, the facilities in the fuel storage pool building 20 and The carry-in / out entrance building 24 and the carry-in / carry-out path 29, which are indoor transportation paths interconnecting each other, and the method of transferring the spent fuel 6 by the same are substantially the same as those in the above-described one embodiment.

A feature of this and other embodiments is that a fuel storage pool building 20 in which spent fuel storage pools 25, 26, etc. are installed adjacent to the reactor building is provided with two reactor buildings 1 and 35. By making it possible to store fuel with a higher degree of freedom as a common use, there is an effect that it contributes to a reduction in the construction cost of the entire plant.

Further, the fuel storage pool building 20 in which the spent fuel storage pools 25 and 26 are installed has the central control room 34 arranged on the upper floor as in the other embodiment shown in FIG. Of course good things.

[0023]

As described above, according to the present invention, since the spent fuel storage pool in the reactor building can be downsized regardless of the total required storage capacity, the reactor building can be downsized, and further the reactor building can be downsized. It is possible to make the structure more advantageous in terms of earthquake resistance.

Further, by installing a fuel storage pool building adjacent to the reactor building and increasing the capacity of the spent fuel storage pool provided therein, it is possible to increase the capacity of the spent fuel storage facility in the reactor building. It can be carried out easily without any impact, and has the effect of reducing the construction cost including the site.

[Brief description of drawings]

FIG. 1 is a plan sectional view of a reactor building and a fuel storage pool building of the present invention.

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

FIG. 3 is a side sectional view of a reactor building and a fuel storage pool building showing another embodiment of the present invention.

FIG. 4 is a plan sectional view of a reactor building and a fuel storage pool building showing another embodiment of the present invention.

FIG. 5 is a vertical cross-sectional view of a conventional reactor building.

[Explanation of symbols]

1, 35 ... Reactor building, 2 ... Reactor containment vessel, 3, 25, 26
… Spent fuel storage pool, 4… Reactor, 5… Refueling machine, 6… Spent fuel, 8,30… Overhead crane, 9… Hatch, 11… Delivery port, 20,33… Fuel storage pool building, 21…
Transfer cask in the building, 22, 27, 28 ... Cask pit, 23
… Hatch, 24… Carrying in / out building, 29… Carrying in / out road, 31… Rail, 32… Transfer cart, 34… Central control room.

Claims (1)

[Claims] 1. A spent fuel storage facility installed in a nuclear power plant for storing and cooling spent fuel, which is installed outside a reactor containment vessel inside a reactor building containing a nuclear reactor. Spent fuel storage pool and spent fuel transfer equipment, a building with a spent fuel storage pool and spent fuel transfer equipment installed adjacent to this reactor building, and inside and outside of this building and the reactor building Fuel storage facility characterized by having an indoor transportation route for spent fuel in both buildings in.