JPH0370199B2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a nuclear reactor containment facility that facilitates the loading and unloading of equipment, particularly long and large equipment, and that allows the reactor building to be made more compact. .

[Technical Background of the Invention] Reactor containment vessels in nuclear power plants are designed to improve earthquake resistance, reduce the size of reactor buildings, maintain airtightness, reduce the capacity of containment air conditioning equipment, and reduce costs. The size has been reduced to the minimum required size. Therefore, the configuration of a conventional nuclear reactor building will be explained with reference to FIG. FIG. 3 is a diagram showing the configuration of a pressurized water reactor, and reference numeral 1 in the figure indicates a reactor building made of reinforced concrete. A reactor containment vessel 2 made of steel plate is installed in the center of the reactor building 1 . A reactor vessel 3 is housed within this reactor containment vessel 2, and a reactor core 4 is further housed within this reactor vessel 3.
is accommodated. Furthermore, a primary circulation pump 5 and an intermediate heat exchanger 6 are installed inside the reactor containment vessel 2 and on the outer peripheral side of the reactor vessel 3. Further, outside the reactor containment vessel 2 and inside the reactor building 1, a steam generator 7 and a secondary circulation pump 8 are installed.

An overhead crane 9 is installed in the reactor building 1 above the reactor containment vessel 2 . When carrying in and out of equipment, this overhead crane is used to carry out the work via a hatch 11 formed on the operating floor 10 and a hatch 12 for carrying in and out of equipment.

[Problems with the Background Art] In the above configuration, the large equipment such as the primary circulation pump 5 and the intermediate heat exchanger 6 installed in the reactor containment vessel 2 is long, and the hatch 12 for carrying in and out of the equipment is long. In order to carry it out through the pipe, it must be turned on its side. Therefore, a space is required inside the reactor containment vessel 2 for pulling out and laying down large equipment that is not used except during regular inspections or maintenance, and above this space there is a space for the overhead crane 9. This became necessary and caused the reactor containment vessel 2 to be enlarged.
Such an increase in the size of the reactor containment vessel 2 not only increases the size of the reactor building 1 but also induces a higher center of gravity.Also, the space volume of the reactor building 1 is large, and the heat load capacity of the air conditioning equipment is large. There were also problems with capacity. This is true not only for pressurized water reactors, but also for loop-type and tank-type fast breeder reactors, which have similar building structures.

[Objective of the Invention] The present invention has been made based on the above points, and its purpose is to facilitate the loading and unloading of long and large equipment during periodic inspections or maintenance, and to The object of the present invention is to provide a reactor containment facility that allows the containment vessel and, by extension, the reactor building, to be smaller and have a lower center of gravity.

[Summary of the invention] That is, the present invention provides a first
a second building constructed adjacent to the first building, a reinforced concrete reactor containment vessel built integrally within the first building, and a ceiling portion of the reactor containment vessel. A hatch for carrying in and out of equipment formed in It is located in a reactor containment facility equipped with a crane.

In a reactor containment facility with this type of configuration, when carrying long and large equipment into and out of the reactor containment vessel during periodic inspections or maintenance, the mobile building must first be moved to the roof of the building where the equipment is located. The mobile building is then moved and the equipment is moved to the roof of the other building for maintenance and other purposes.

[Embodiment of the Invention] An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. FIG. 1 is a diagram showing the configuration of a reactor containment facility for a tank-type fast breeder reactor, and reference numeral 101 in the figure indicates a reactor building as a first building made of reinforced concrete. This reactor building 101
A reactor containment vessel 102 made of reinforced concrete and integrated with the reactor building 101 is installed approximately in the center. The inner peripheral surface of the reactor containment vessel 102 is lined with a liner plate 102A made of a steel plate. A reactor vessel 103 is installed within the reactor containment vessel 102, and this reactor vessel 103 is connected to the support wall 10 through a roof slab 104.
It is supported by 5. A coolant 106 and a reactor core 107 are housed within the reactor vessel 104 . This core 107 is composed of a plurality of fuel assemblies, control rods, etc. (not shown). core 10
A plurality of primary circulation pumps 108 and intermediate heat exchangers 109 are installed at equal intervals alternately in the circumferential direction inside the reactor vessel 103 on the outer peripheral side of the reactor vessel 7 . Also, outside the reactor containment vessel 102 and in the reactor building 10
1, a steam generator 110 and a secondary circulation pump 111 are installed. Also, reactor building 101
There is a maintenance building 112 as a second building.
is being built adjacent to it.

Hatches 113 and 114 are installed on the ceiling of the reactor containment vessel 102 at positions directly above the primary circulation pump 108 and intermediate heat exchanger 109. Also, in the ceiling of the reactor building 101, there is a steam generator 110 and a secondary circulation pump 11.
Hatches 115 and 116 are also installed directly above the hatches 1. In addition, the maintenance building 11
Hatches 117 and 118 are also installed on the ceiling of No. 2. In addition, the symbols 113A, 114A, 1 in the figure
15A, 116A, 117A, and 118A are hatch lids, respectively.

The roof 119 of the reactor building 101 and the roof 120 of the maintenance building 112 are on the same level, and rails (not shown) are continuously laid on these roofs 119 and 120. A traveling building 121 is installed so as to be able to travel via this rail. That is, during periodic inspections or maintenance, the mobile building 121 is moved and positioned above the reactor building 101. The equipment to be inspected is taken out from inside the reactor building 101 and stored, and then travels to the upper part of the maintenance building 112. The stored equipment is carried into the maintenance building 112 and subjected to inspection. An overhead crane 122 is installed on the ceiling inside the mobile building 121.
is installed.

The operation will be explained based on the above configuration. First, we will explain the normal operation of the plant. During normal operation, the mobile building 121 is located above the maintenance building 112, as shown in FIG. Therefore, since the load of the heavy overhead crane 122 is not applied to the reactor building 101,
The center of gravity can be lowered to improve earthquake resistance.

Next, maintenance will be explained. In this case, the mobile building 121 is driven to a location where the equipment to be maintained is installed. Assuming that the intermediate heat exchanger 109 is currently subject to maintenance, the mobile building 121 is moved to above the intermediate heat exchanger 109 as shown in FIG. In this case, since the intermediate heat exchanger 109 is installed in the reactor containment vessel 102 as a radiation controlled area, a cask 124 equipped with a door valve 123 at the lower end is hung by an overhead crane 122 and removed from the reactor. It is transported to the upper part of the building 101 and installed above the hatch 114.
Then, the intermediate heat exchanger 109 is removed. In this case, the intermediate heat exchanger 109 is lifted up by the overhead crane 122 and housed in the cask 124 while the lid body 114A is opened and the atmosphere is isolated by the door valve 123. Once accommodated, the mobile building 121 is driven to above the maintenance building 112. and maintenance building 112
The equipment will be brought inside and maintenance work will be carried out.

Next, it is necessary to carry in the intermediate heat exchanger 109 after the maintenance work has been completed, but in this case, this can be easily done by performing the reverse operation to the above. Further, this series of operations is performed not only for the intermediate heat exchanger 109 but also for the primary circulation pump 108, the steam generator 110, and the secondary circulation pump 111.

According to this embodiment, the following effects can be achieved.

(1) First, during maintenance, the mobile building 121
Reactor building 101 and maintenance building 1
12, and by using the overhead crane 122, the primary circulation pump 108 and intermediate heat exchanger 109, which are long and large equipment inside the reactor containment vessel 102, can be transported without falling over. can be entered.
This includes a steam generator 110 and a secondary circulation pump 111 installed outside the reactor containment vessel 102.
The same applies to Therefore, there is no need for a space for laying it down as in the past, and it is possible to effectively downsize not only the reactor containment vessel 102 but also the reactor building 101. In addition, since maintenance of small equipment can be performed inside the mobile building 121, space for small equipment maintenance is also unnecessary.
2 and the reactor building 101 can be made more compact.

(2) Also, carry out equipment in and out of the reactor containment vessel.
Since this can be carried out using only one overhead crane 122, the number of cranes and crane installation space can be reduced, and the space within the reactor building 101 can be used effectively.

(3) The earthquake resistance of the reactor building 101 is also significantly improved, making it possible to provide a highly reliable and safe plant.

It should be noted that the present invention is not limited to the above-mentioned embodiments, but can also be applied to, for example, a loop type fast breeder reactor or a pressurized water type nuclear reactor.

[Effects of the Invention] As detailed above, according to the reactor containment facility according to the present invention, long and large equipment can be easily carried in and out during periodic inspections or maintenance, and at that time, it is possible to easily carry in and out the reactor containment facility according to the present invention. Since it does not need to be tipped on its side, there is no need for space for it to be tipped on its side, making it possible to reduce the size and weight of not only the reactor containment vessel but also the reactor building itself, improving seismic resistance and reducing the heat load capacity of air conditioning equipment. It has various effects such as being able to be made smaller and improving economical efficiency.

[Brief explanation of drawings]

Figures 1 and 2 are diagrams showing one embodiment of the present invention, with Figure 1 showing the configuration of a reactor containment facility for a tank-type fast breeder reactor, and Figure 2 showing the loading and unloading of large equipment. 3 are diagrams showing the configuration of a reactor containment facility for a conventional pressurized water reactor. 101...Reactor building (first building), 102
...Reactor containment vessel, 112...Maintenance building (second building), 113,114...Hatch,
121...Movable building, 122...Overhead crane.

Claims (1)

[Scope of Claims] 1. A first building made of reinforced concrete, a second building constructed adjacent to the first building, and an atom made of reinforced concrete constructed integrally within the first building. A reactor containment vessel, a hatch formed on the ceiling of the reactor containment vessel for carrying in and out of equipment, and a movable hatch installed between the roof of the first building and the roof of the second building. A nuclear reactor containment facility comprising: a mobile building, a crane installed in the mobile building; and a crane installed in the mobile building. 2. The reactor containment facility according to claim 1, wherein the inner peripheral surface of the reactor containment vessel is airtightly lined with a steel liner plate. 3. The nuclear reactor containment facility according to claim 1, wherein the hatches are formed directly above each piece of equipment. 4. The nuclear reactor containment facility according to claim 1, wherein the second building is a maintenance building having a hatch in the ceiling for carrying in and out of equipment.