JP2006090776A - Method of constructing nuclear reactor building - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To expedite power reception period and shorten whole plant construction period by responding to work and electric tests in a central control room to the power reception with a marginal process. <P>SOLUTION: In constructing a nuclear power station, the construction of the central control room placed in an upper story and lower body of the central control room lower body is conducted in parallel and the central control room is made a unit system. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a construction method of a nuclear reactor building in a nuclear power plant, and in particular, performs a parallel construction of a central control room arranged in the upper hierarchy of the nuclear reactor building and a lower casing arranged in the lower part thereof, The present invention relates to a construction method of a nuclear reactor building that shortens the construction period of a nuclear power plant by unitizing a central control room.

  In general, in the construction of nuclear reactor buildings at nuclear power plants, the building work is proceeded from the bottom in the order of floors, walls, and ceilings. Have started. Therefore, the construction start time in the room is delayed toward the upper floor.

  This conventional construction process will be specifically described with reference to FIG. FIG. 6A is a schematic diagram showing a building structure, and FIG. 6B is an explanatory diagram showing a construction procedure.

  As shown in FIG. 6 (A), the central control room 1 is installed on the upper floor of the reactor building, for example, along the periphery, and the lower floor of the central control room 1 has a plurality of lower housings 2 from below. (2a, 2b, 2c) are stacked.

  Then, as shown in FIG. 6 (B), the lower housing construction starts from the lower housing 2a on the lowermost floor, and then proceeds to the lower housings 2b and 2c on the upper floor side in order. Construction is carried out. After the construction of the central control room 1 is completed, electrical work, testing, etc. in the central control room 1 are performed. That is, under the conventional construction method, since the central control room 1 is installed on the upper floor, the construction of the central control room 1 is started after the construction of the lower casing 2 is completed. In the construction of nuclear power plants, the timing of power reception is critical, so the interior work and electrical tests from the completion of the central control room 1 to the power reception are handled in a very severe period. is there.

In the meantime, as a technique for shortening the construction period of the reactor building, there has been proposed a method for unitizing lighting, ducts, and ceiling fittings in the double ceiling of the central control room (see Patent Document 1). However, even in this technology, the lower frame work starts from the lower frame on the lowest floor, proceeds in sequence to the lower frame on the upper floor side, and finally completes the frame work of the central control room 1 and then the central control Electrical work, testing, etc. in room 1 are performed.
JP-A-10-260284

  As described above, in the conventional construction method, since the construction of the central control room is started after the construction of the lower housing is completed, the indoor construction and electrical tests from the completion of the construction of the central control room 1 to the reception of power are very important. The current situation is that we are responding to a severe period.

  The present invention has been made in view of such circumstances, and enables the construction and electrical tests in the central control room until power reception can be handled with a sufficient process. It aims at providing the construction method of the reactor building which can aim at.

  In order to achieve the above object, according to the first aspect of the present invention, in a construction method for constructing a nuclear power plant nuclear reactor building, a central control room housing disposed in an upper hierarchy of the nuclear reactor building, and the central control A construction method for a reactor building characterized in that the construction with the lower housing arranged in the lower part of the room is carried out in parallel in different areas, and the central control room is constructed as a unit having a panel and wiring. I will provide a.

  In the invention according to claim 2, the construction and electrical test in the central control room are completed in an area for constructing the central control room chassis, and after the construction of the lower chassis is completed, the central control room is located above the lower chassis. Providing a construction method for reactor buildings equipped with control rooms.

  In the invention which concerns on Claim 3, the area which constructs the structure of the said central control room, and the indoor construction is set to the periphery of the said reactor building, The large crane provided in the periphery of the said reactor building, or the said area Provided is a construction method for a reactor building in which the central control room is moved and mounted above the lower housing by a temporary portal crane provided.

  According to a fourth aspect of the present invention, there is provided a construction method for a nuclear reactor building in which the indoor work and electrical test period of the central control room constructed as a unit are completed by a power reception time that is critical for the construction of a nuclear power plant.

  According to a fifth aspect of the present invention, there is provided a construction method for a reactor building that shortens the entire construction period in the construction of the nuclear power plant by bringing forward the power receiving time that is critical for construction of the nuclear power plant.

  According to the present invention, by carrying out in parallel in different areas the construction of the central control room housing arranged in the upper hierarchy of the reactor building and the lower housing arranged in the lower part of this central control room, The construction of the central control room can be started early and the construction of the central control room can be completed early. Moreover, the central control room can be constructed as a unit with a panel and wiring, so that the indoor work and tests can be performed at an early stage.

  Then, the construction and electrical tests in the central control room are completed in the area where the central control room chassis is constructed, and after the construction of the lower chassis is completed, the central control room is installed above the lower chassis, and the process up to receiving power It is possible to secure or to advance the power reception period, which is critical for the construction of nuclear power plants, and shorten the overall construction period.

  DESCRIPTION OF EMBODIMENTS Hereinafter, an embodiment of a reactor building construction method according to the present invention will be described with reference to FIGS.

  FIG. 1A is a partial longitudinal sectional view for explaining a building construction method, and FIG. 1B is a plan view of FIG. FIG. 2 is an explanatory view showing a procedure according to the construction method. FIG. 3 is a perspective view showing the internal configuration of the central control room. 4 (A), 4 (B) and FIG.

  As shown in FIGS. 1A and 1B, in the present embodiment, a central control room housing 1 (hereinafter referred to as “control room housing 1”) disposed in the upper hierarchy of the reactor building, and this. The construction of the lower housings 2a, 2b, 2c arranged in the lower part of the central control room housing 1 is carried out in parallel in different areas. That is, the central control room housing 1 is constructed, for example, in an area 11 around the reactor building (hereinafter referred to as “central control room construction area 11”), and the lower housings 2a, 2b, 2c are in the construction area 12 of the building itself. It is constructed as before.

  The central control room construction area 11 is arranged, for example, along the entire periphery of the reactor building, but in FIG. 1A, the central control room construction area 11 and the central control room housing at the left and right opposing portions on the paper surface. Only 1 is shown in a simplified manner. FIG. 1B shows only the central control room construction area 11 and the central control room housing 1 in the upper half on the paper.

  In the central control room construction area 11, as a facility for mounting the central control room housing 1 on the lower housing 2c, a traveling rail 3 and a central control room housing constructed on the traveling rail 3 after being constructed are constructed. A temporary portal crane 4 for lifting 1 to the installation level is installed. Although not shown, a large crane provided around the reactor building may be used for lifting the central control room housing 1 instead of the portal crane 4.

  Further, in the central control room construction area 11, a cart (not shown) is mounted on the rail 3, and the central control room housing 1 is constructed on the cart.

  Under such an arrangement setting, as shown in FIG. 2 as a process diagram, the central control room housing construction (1) and the lower housing construction (2a), (2b) arranged at the lower part of the central control room housing 1 ), (2c) are performed in parallel. In addition, indoor construction is performed after the predetermined curing period has elapsed at the end of each lower frame construction (2a), (2b), (2c).

  After the completion of the central control room housing (1), the central control room construction, electrical tests, and other various tests are performed after a predetermined curing period. Then, after the construction of the lower housings 2a, 2b, 2c is completed, and after the construction and electrical tests in the central control room are completed, the central control room housing 1 is placed above the uppermost lower housing 2c, for example, the gate. It is mounted by applying the type crane 4 (see arrow a in FIG. 1).

  In the present embodiment, the central control room housing 1 constructed in the central control room construction area 11 is constructed as a unit including a panel and wiring. FIG. 3 shows this unit structure.

  As shown in FIG. 3, as the central control room construction, concrete foundation 5, H-shaped steel 6, channel base 7, panel 8, central control room floor 9, cable 10 and the like are performed as control panel foundation work. And an electrical test is implemented beforehand and it mounts on the lower housing | casing 2c as a central control room unit system.

  As described above, in the embodiment, the central control room housing 1 and the indoor work, electrical tests, and the like can be performed in parallel with the lower housings 2a, 2b, and 2c.

  4A and 4B show the building construction sequence of the embodiment of the present invention and the conventional example in comparison. As shown in FIG. 4 (A), in the conventional sequence, after completion of the lower housing construction (2a), (2b), (2c) and the indoor construction, the central control room housing construction (1) is performed, and thereafter Whereas the central control room construction and electrical tests were performed, in the sequence of the present invention, the lower frame construction (2a), (2b), (2c) and the central control room cabinet construction (1), as well as the indoor construction and electricity Tests are performed in parallel. As a result, in the present embodiment, the central control room housing construction (1) is completed earlier than in the prior art, whereby the central control room construction and the electrical test can be completed early.

  FIG. 5 shows a comparative example of the flow until power reception, which is critical for the construction of a nuclear power plant, in the process of this embodiment and the conventional process.

  As shown in FIG. 5, in the case of the conventional process, after completion of the lower housing construction, the central control room housing construction is performed, and then the central control room electrical construction work and electrical tests are performed. Power is received after the whole period, which is the sum of, ends.

  On the other hand, in this embodiment, the lower case work and the central control room case work are performed in parallel, and further, the electric work (indoor work) and the electric test in the central control room are also performed in parallel with the lower case work. . Then, power can be received immediately after the subsequent mounting of the central control room housing to the lower housing and electrical testing.

  In other words, in the present embodiment, the indoor work and electrical test period of the central control room constructed as a unit are completed by the power reception time that is critical for the construction of the nuclear power plant. In addition, the entire construction period in the construction of the nuclear power plant is shortened by advancing the power reception period that is critical for the construction of the nuclear power plant.

  Therefore, according to the present embodiment, in the construction work of the nuclear power plant, the central control room installed in the upper hierarchy and the lower housing of the central control room are constructed in parallel, and the central control room is unitized. As a result, it is possible to advance the power reception period and shorten the entire construction period of the plant construction. In addition, it is possible to secure the process until power reception or to advance the power reception time which is critical, thereby shortening the entire construction period.

  In addition, there is an area around the reactor building where the central control room unit is built and indoor work is done, and a large crane provided around the building or a temporary portal crane provided in the construction area, via the traveling rail By making it possible to mount and move the central control room unit to the place, the entire construction period of the plant construction can be shortened.

(A), (B) is a conceptual diagram of central control room unit systemization and construction method by one Embodiment of this invention. The work flow figure of central control room unit systemization and construction method by one Embodiment of this invention. The central control room sectional view by one embodiment of the present invention. (A), (B) is a flow comparison figure of the conventional construction method and this invention construction method. The process comparison figure of a conventional construction method and this invention construction method. (A), (B) is the conceptual diagram of the central control room unit systemization and construction method by a conventional method.

Explanation of symbols

1 Central control room frame 2 Lower frame 3 Rail 4 Portal crane 5 Concrete foundation 6 H-shaped steel 7 Channel base 8 Panel 9 Cable 10 Floor 11 Central control room construction area 12 Building itself construction area

Claims (5)

In the construction method of a nuclear power plant reactor building, the construction of the central control room housing arranged in the upper hierarchy of the nuclear reactor building and the lower housing arranged in the lower part of the central control room in different areas A construction method for a reactor building, which is performed in parallel, and the central control room is constructed as a unit having a panel and wiring. The construction of the central control room and an electrical test are completed in an area for constructing the central control room housing, and after the construction of the lower housing is completed, the central control room is mounted above the lower housing. The construction method of the reactor building described. An area for constructing the central control room and carrying out the indoor work is set around the reactor building, and a large crane provided around the reactor building or a temporary portal crane provided in the area 3. The construction method of a reactor building according to claim 2, wherein the central control room is moved and mounted above the lower housing. The construction method for a nuclear reactor building according to claim 2, wherein the indoor construction and electrical test period of the central control room constructed as a unit are completed by a power reception time that becomes a critical point for construction of a nuclear power plant. 5. The construction method for a reactor building according to claim 4, wherein the construction period of the nuclear power plant is shortened by advancing the power reception time that is critical for the construction of the nuclear power plant.

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