JP3946352B2 - Construction method of reactor containment vessel - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  The present invention relates to the construction technology of a reactor building installed in a nuclear power plant, and in particular, a reactor containment vessel made of reinforced concrete is stored in the reactor building.Construction method of reactor containment vesselAbout.
[0002]
[Prior art]
  At the nuclear power plant, a containment vessel is stored in the reactor building. The reactor containment vessel is made of reinforced concrete and has a structure in which a concrete body having an inner bar arrangement and an outer bar arrangement is arranged outside a steel liner that is a cylindrical portion liner. For example, the construction of a reactor containment vessel in an improved boiling water nuclear power plant (hereinafter referred to as an ABWR nuclear power plant) is a critical path for the construction process of the ABWR nuclear power plant.
[0003]
  A conventional method for constructing a reinforced concrete containment vessel (hereinafter referred to as RCCV) will be described with reference to FIGS. 16 to 19 by taking an ABWR power plant as an example.
[0004]
  FIG. 16 is a partial cross-sectional view schematically showing the inside of the reactor building 1 of the ABWR nuclear power plant. The RCCV 2 is stored in the reactor building 1, and the reactor pressure vessel 3 is stored in the RCCV 2. The The reactor pressure vessel 3 is supported by a reactor pressure vessel support pedestal (hereinafter referred to as an RPV support pedestal) 5 erected on a reactor building mat 4 as a foundation floor.
[0005]
  On the other hand, the RCCV 2 is a reinforced concrete structure including a cylindrical wall 6 and an upper floor 7 called a top slab, and is configured as shown in FIG. The RCCV2 is installed in the ABWR nuclear power plant by the construction shown in FIGS. FIG. 17 is a cross-sectional view during construction of the cylindrical wall 6 of the RCCV2, FIG. 18 is a cross-sectional view showing construction of the diaphragm floor 8, and FIG. 19 is a cross-sectional view showing construction of the top slab of the RCCV2.
[0006]
  As shown in FIG. 17, the RCCV 2 has an inner reinforcing bar 11 and an outer reinforcing bar 12 arranged on the outer peripheral side of the steel liner 10, while the steel liner 10 has a cut tee that serves as an anchor for concrete. A material 13 is attached. The steel liner 10 is produced by assembling a ring-shaped liner element in advance on the ground in the factory or near the site and manufacturing it into a cylindrical shape. Torus-shaped, sleeve-shaped or ring-shaped prefabricated liner elements are stacked in a multi-stage structure to form a cylindrical shape. Alternatively, it is configured in a sleeve shape.
[0007]
  When the RCCV 2 is constructed, as shown in FIGS. 16 and 17, after the reactor building mat 4 is constructed, the liner first stage 15, which is a liner element, is suspended in the reactor building 1 by a lifting machine. The stage 15 is installed on the reactor building mat 4. As for the height of the first stage 15 of the liner, the pressure suppression chamber liner 16 and the diaphragm liner 17 are generally integrated.
[0008]
  As shown in FIG. 17, the first liner 15 of the steel liner 10 has penetrations 18 such as pipes, electric cables, instrumentation pipes, etc. penetrating the reactor building 1, and hatches 19 for access / equipment of personnel. However, since a part of the pipe penetration 18 has a double pipe structure and is large in terms of load, the penetration 18 having a large diameter is temporarily supported by a temporary member 20 such as a temporary diagonal member. Similarly, the hatch 19 is supported by a temporary member and suspended in the site.
[0009]
  After the liner first stage 15 is suspended, the reinforced concrete work is started on the outer peripheral side of the liner first stage 15. Construction of the inner reinforcement 11 and the outer reinforcement 12 of the RCCV 2 is performed, the outer mold 22 is attached, and concrete is placed. The first stage 15 of the liner also serves as an inner mold for casting concrete. RCCV concrete placement is generally performed for each floor of the reactor building 1 because the RCCV itself is part of the reactor building housing.
[0010]
  In parallel with the RCCV concrete work in the first stage 15 of the liner, as shown in FIG. 16, the internal structures such as the RCCV bottom liner 23, the RPV support pedestal 5, and the pressure suppression chamber access tunnel 24 are assembled. The The RPV support pedestal 5 is made of steel and has a structure filled with grout.
[0011]
  When the internal structure of the pressure suppression chamber 25 is installed to some extent, the liner second stage 26 as the next liner element is suspended. Similarly to the liner first stage 15, the liner second stage 26 is a ring-shaped ring-cutting element assembled in advance on the ground in the vicinity of the factory or the site. The penetration 18 and the hatch 19 having a large diameter are temporary materials. Supported and suspended in the field. The liner second stage 26 is generally integrated with a dry well liner 27. A dry well 28 is formed inside the dry well liner 27.
[0012]
  After the liner second stage 26 is suspended, circumferential welding of the liner first stage 15 and the liner second stage 26 is performed. When the circumferential welding is completed, similarly to the liner first stage 15 shown in FIG. 17, reinforced concrete work is started on the outer peripheral side of the liner second stage 26, and the inner reinforcement 11, outer reinforcement 12, and outer mold of the RCCV 2 are started. The frame 22 is attached, and concrete is placed sequentially.
[0013]
  On the other hand, when the internal structure in the pressure suppression chamber 25 is completely taken in, a diaphragm floor (hereinafter referred to as DF) construction is started as shown in FIG.
[0014]
  The diaphragm floor (DF) 8 is a structure composed of a steel plate seal plate 30 and reinforced concrete 31, and the RCCV 2 is separated (formed) into a lower pressure suppression chamber 25 and an upper dry well 28 with the DF 8 as a boundary. Yes. The diaphragm floor 8 has a structure in which the inner end portion is supported by the RPV support pedestal 5 and the outer end portion is supported by the RCCV cylindrical wall 6 via the diaphragm liner 17.
[0015]
  For the construction of the diaphragm floor 8, first, the temporary support structure 33 that supports the construction load of the seal plate 30 and the reinforced concrete 31 of the DF 8 is mounted. The temporary support structure 33 in FIG. 18 shows a support method using a spring steel material from the RPV support pedestal 5, but depending on the progress of the RCCV cylindrical concrete body, both ends support of the RPV support pedestal 5 and RCCV2, There is also a method of assembling and supporting a temporary support work from the reactor building mat 4 as in general construction.
[0016]
  When the attachment of the temporary support structure 33 is completed, the installation of the steel plate seal plate 30 is performed. The seal plate 30 is generally assembled in a donut shape or a torus shape by suspending a plate element divided into three or four in a fan shape on a temporary support structure 33 and welding.
[0017]
  After completion of installation of the seal plate 30 and completion of the internal grout of the RPV support pedestal 5, the bar arrangement work is performed. The diaphragm floor bar arrangement 34 is a radial / circular bar arrangement, and the outer end of the radial / circular bar arrangement 34 is coupled to a bar arrangement coupler 35 fixed to the diaphragm liner 17 by a grout joint. ing.
[0018]
  After the reinforcement work is completed, concrete placement work will be carried out. And after intensity | strength expression of DF reinforced concrete 31 starts carrying in of an internal structure into the upper dry well 28, and implements removal of DF temporary support structure 33. FIG.
[0019]
  When the internal structure of the upper dry well 28 is completed and the concrete placement of the cylindrical portion 6 of the RCCV 2 is completed to the bottom of the top slab 7, construction of the RCCV top slab 7 is started as shown in FIG. To do. The top slab 7 is composed of a steel plate top slab liner 37, an RCCV internal flange 38 and a reinforced concrete 39, and is structured to be cantilevered from the RCCV cylindrical portion 6.
[0020]
  Prior to the construction of the top slab 7, the support bracket 41 is removably attached to the reactor shielding wall 30 installed in the upper dry well 28, and the support post is mounted on the concrete placement completion surface of the RCCV cylindrical portion 6. 43 is installed.
[0021]
  The top slab 7 is suspended in advance by prefabricating the top slab liner 37, the RCCV lower flange 38, the orthogonal reinforcement 44, and the built-in support structure 45 on the ground in the vicinity of the site.
[0022]
  The built-in support structure 45 becomes a support structure when the top slab 7 that is prefabricated and integrated is suspended, and is supported by the support bracket 41 of the reactor shielding wall 40 and the column 43 of the RCCV cylindrical portion. By supporting the structural material 45, it plays the role of supporting the load when the top slab 7 is installed and when the concrete is placed.
[0023]
  After the top slab 7 that has been prefabricated and integrated is suspended, circumferential welding of the liner second stage 26 and the top slab liner 37 is performed. Welding is performed by one-side welding from the inside of RCCV2.
[0024]
  In parallel with the welding operation of the liner, the inner and outer bar arrangements 11 and 12 of the RCCV cylindrical portion 6 and the joint bar arrangement 46 of the top slab bar arrangement 44 are performed. After completion of the joint arrangement 46, a formwork is attached to the outside of the RCCV cylindrical portion of the top slab 7, and concrete is placed. Then, after the strength of the top slab concrete 39 is developed, the support bracket 41 of the reactor shielding wall 40 is removed.
[0025]
[Problems to be solved by the invention]
  In the conventional RCCV construction method, the construction of the RCCV cylindrical portion 6 starts the reinforcement work of the RCCV 2 after the steel liner 10 is suspended and installed. The work scaffold is assembled and the RCCV inner reinforcement 11 is placed. After the RCCV inner reinforcement 11 is placed, the scaffold must be disassembled and the RCCV outer reinforcement work must be assembled again before the outer reinforcement 12 is placed. The construction work was a cause of a long period of time.
[0026]
  Moreover, since the construction of the conventional RCCV diaphragm floor portion was carried out in the field after the liner second stage 26 was suspended, the temporary support structure 33, the seal plate 30 and the bar arrangement work 34 were carried out on the site. The work was carried into a narrow space between the stage 26 and the RPV support pedestal 5, and workability was not good.
[0027]
  Further, in the conventional construction of the top slab portion of the RCCV2, the top slab bar arrangement 44 is an orthogonal bar arrangement in the connection between the top slab 7 and the RCCV cylinder portion 6, whereas the bar arrangements 11 and 12 of the RCCV cylinder portion 6 are performed. Since it rises in a circumferential shape or a cylindrical shape, if the vertical reinforcements 11 and 12 of the RCCV cylindrical portion 6 are first raised to the top slab fixing portion, the top slab 7 that is prefabricated and integrated is suspended. When fixing, the fixed portion of the top slab orthogonal reinforcement 44 and the RCCV cylindrical vertical reinforcement 11 and 12 interfere with each other. For this reason, the inner and outer reinforcing bars 11 and 12 of the RCCV cylindrical part 6 are temporarily stopped under the top slab 7, and after the top slab 7 is completely suspended, the RCCV cylindrical part reinforcing bar 46 and the fixing part of the top slab 7 are connected to each other. Reinforcement work occurred, and this joint arrangement work was a factor that could not shorten the top slab construction process.
[0028]
  Furthermore, in the conventional construction of the top slab portion of the RCCV2, a support bracket 41 is attached to the reactor shielding wall 40 as a load support when the top slab 7 is installed and when concrete is placed. Avoid the interference between the inner end of the built-in support structure 45 of the support bracket 41 and the loop outermost bar of the top slab orthogonal reinforcement 44, and stop the inner end of the built-in support structure 45 in front of the outermost muscle. Yes. For this reason, the support bracket 41 is required. This support bracket 41 had to be removed after the concrete strength of the top slab 7 was developed to interfere with the installation of the main structure.
[0029]
  Further, the penetration penetration 18 and the hatch 19 that are attached to the steel liner 10 of the conventional RCCV2 are temporarily supported from the steel liner 10 by a temporary diagonal member 20 or the like, and therefore, after the RCCV liner 10 is suspended, At the stage when the 12 bar arrangement work was started, a replacement work occurred for a member interfering with the bar arrangement work, which was a factor complicated with the RCCV bar arrangement work.
[0030]
  The present invention has been made in consideration of the above-mentioned circumstances, greatly reducing the work of the RCCV work in the construction site, ensuring the efficiency and efficiency of the work of the RCCV work, and ensuring the safety. RCCV construction process can be greatly shortened and construction period can be shortened.Construction method of reactor containment vesselThe purpose is to provide.
[0031]
  Another object of the present invention is to independently assemble the RCCV inner reinforcement on the outside of the steel cylindrical liner on the ground in the vicinity of the site, and simultaneously suspend the steel liner and the inner reinforcement at a predetermined position on the construction site. In addition, the RCCV inner bar arrangement work in the construction site (scaffolding assembly, bar arrangement, scaffold dismantling) is reduced, and the RCCV construction process is shortened.Construction method of reactor containment vesselThe purpose is to provide.
[0032]
[Means for Solving the Problems]
  The present inventionIn order to solve the above-described problems,Claim 1As described inOn the ground, a staircase structure with a height increasing from the inside to the outside is installed on the outside of the cylindrical liner that constitutes the reactor containment vessel made of reinforced concrete, and multiple rows are placed on each step of the staircase structure. Install the tubular body reinforcement so that the load of the tubular body reinforcement does not act on the cylindrical part liner, and lift the cylindrical part reinforcement and the cylindrical body reinforcement independently by a lifting machine, A reactor containment vessel that is installed at a predetermined position on a building construction site Construction methodIt is.
[0033]
  Further, in order to solve the above-described problem, a method for constructing a reactor containment vessel according to the present invention includes:Claim 2Of the containment of the reactor containment such as the mat differential bars fixed at the construction site of the reactor building andTubular bar arrangementIs a method in which the length of each joint is fixed at each stage and connected by the bar arrangement joint means,Claim 3And the cylindrical liner of the reactor containment vessel as described inTubular bar arrangementWhen the cylindrical liner is welded to the existing liner after being suspended at the construction site simultaneously, during the welding period of the cylindrical liner, the temporary support column installed on the lower concrete of the reactor containment vesselTubular bar arrangementTo support the suspensionIt is.
[0034]
DETAILED DESCRIPTION OF THE INVENTION
  Made of reinforced concrete according to the present inventionConstruction method of reactor containment vesselEmbodiments will be described with reference to the accompanying drawings.
[0035]
  FIG. 1 is an overall cross-sectional view schematically showing a reactor building 1 of an ABWR nuclear power plant equipped with a reactor containment vessel according to the present invention, and members common to the conventional reactor building 1 are denoted by the same reference numerals. A description will be given.
[0036]
  The reactor building 1 stores therein a nuclear reactor containment vessel (RCCV) 2 made of reinforced concrete, and a reactor pressure vessel 3 is accommodated in the reactor containment vessel 2. The reactor pressure vessel 3 is supported on a reactor containment vessel support pedestal (RPV support pedestal) 5 erected on a reactor building mat 4. The reactor containment vessel 3 is surrounded by a reactor shielding wall 40 extending upward from the RPV support pedestal 5 so that the reactor shielding wall 40 shields radiation from the reactor.
[0037]
  The reactor containment vessel (RCCV) 2 includes a cylindrical or sleeve-like cylindrical wall 6 standing on the reactor building mat 4, a diaphragm floor 8 that divides the cylindrical wall 6 into two upper and lower chambers, and the above It is a reinforced concrete container composed of an upper floor 7 called a top slab that covers the top of the cylindrical wall 6. The RCCV 2 is divided into a lower pressure suppression chamber 25 and an upper dry well 28 by a diaphragm floor 8. Suppression pool water as cooling water is stored in the pressure suppression chamber 25.
[0038]
  When the RCCV 2 is constructed, the RCCV steel liner 10 is a cylindrical portion liner that is preliminarily prefabricated on the ground in the vicinity of the factory or construction site, and is formed into a cylindrical shape or a sleeve shape by stacking ring-shaped or torus-shaped liner elements. is there. The RCCV liner 10 includes a pressure suppression chamber liner or a dry well liner.
[0039]
  FIG. 2 shows a state where the RCCV inner reinforcement 11 is independently arranged on the outer periphery of the cylindrical steel liner 10 of the RCCV2 on the ground near the factory or the construction site, for example, on the yard platen, and the assembly is performed. FIG. After the ring-shaped liner element of the RCCV liner 10 is completed into a cylindrical shape or a sleeve shape, the RCCV inner reinforcement 11 is assembled on the outer periphery of the RCCV liner 10 on the ground surface near the factory or construction site, for example. (Ground setting). Reference numeral 50 is a penetration penetration for piping, electrical cables, instrumentation piping, etc., reference numeral 51 is an equipment hatch for equipment in / out attached to the RCCV liner 10, and reference numeral 52 is an entrance / exit hatch for workers.
[0040]
  (1) Reactor containment vessel (RCCV) cylindrical wall structure
  In describing the cylindrical wall structure of the RCCV, the assembly (ground assembly) of the RCCV inner bar arrangement 11 will be described with reference to FIG.
[0041]
  FIG. 3 shows a case where the RCCV inner bar arrangement 11 is assembled (ground assembly) on the outer periphery of the RCCV liner 10 shown in FIG. 2 on the ground in the factory or near the construction site, for example, on the yard surface plate. It is a partial longitudinal cross-sectional view. The RCCV inner bar arrangement 11 is, for example, a cylindrical bar arrangement 59 (60, 61) assembled in a cylindrical shape or a sleeve shape by running a vertical bar arrangement 57 and a horizontal bar arrangement 58 each having a diameter of about 50 mmφ. This is an inner bar arrangement module configured by arranging a plurality of bar arrangements, for example, three bodies 59, 60, 61 concentrically.
[0042]
  First, a work scaffold 54 is assembled along the circumference on the outer periphery of the RCCV liner 11 prefabricated in a ring shape or a sleeve shape, and a staircase frame 55 that receives the RCCV inner reinforcement 11 inside the scaffold 54. Assemble and install. The frame 55 and the scaffold 54 are assembled in the factory or on the ground near the construction site, and installed in a ring shape or a sleeve shape. The ring-shaped or sleeve-shaped RCCV liner 10 is prefabricated in advance on the ground in the vicinity of the factory or construction site, for example, on a yard surface plate, and is supported on the liner cradle 56. The RCCV liner 11 is fixed with a plurality of, for example, 20 cutty members 13 that act as anchors to concrete on the outer peripheral side at a predetermined interval in the circumferential direction. The cut tee 13 extends substantially over the entire length in the axial direction of the RCCV liner 11 and reinforces the RCCV liner 11.
[0043]
  Assembling and arranging the RCCV inner bar arrangement 11 outside the RCCV liner 10 is performed as follows. In the RCCV inner bar arrangement 11, first, the innermost (first row / first stage) vertical bar arrangement 57 is disposed, and the horizontal bar arrangement 58 is sequentially attached to the vertical bar arrangement 57 in the circumferential direction from the outside. The vertical and horizontal reinforcing bars 57 and 58 are assembled into a tubular frame structure. The load of the innermost vertical / horizontal bars 57 and 58 is supported by the first step of the stepped frame 55. You may arrange | position so that the vertical reinforcement 57 may come outside and the horizontal reinforcement 58 may come inside. Loads of the vertical and horizontal reinforcements 57 and 58 are received by the stepped frame 55 and set so as not to be applied to the RCCV liner 10.
[0044]
  By assembling the innermost (first stage) vertical and horizontal bar arrangements 57 and 58, the first row of tubular body reinforcements 59 is formed into a frame structure, and on the outside of the first row of cylindrical body reinforcements 59. The second and third rows of cylindrical body reinforcements 60 and 61 are sequentially arranged and assembled. Similarly to the first row tubular body reinforcement 59, the second and third row tubular body reinforcements 60 and 61 are integrated by arranging the vertical reinforcement 57 and the horizontal reinforcement 58 and assembling them. It is structured in a framework structure.
[0045]
  The cylindrical body reinforcing bars 59, 60, 61 in each row are supported by the respective steps of the stepped frame 55. The frame 55 is formed in an upward staircase shape from the first stage toward the nth stage radially outward, for example, the third stage. The frame 55 has a portion for receiving the innermost (first row) vertical reinforcement 57 in order to facilitate the connection between the RCCV inner reinforcement 11 and the mat differential reinforcement 63 which is a rising reinforcement at the construction site. The lowest. The frame 55 may be configured in a ring shape or a torus shape so as to surround the outer peripheral side of the RCCV liner 10 installed on the liner cradle 56, or a plurality of frames 55 may be arranged at appropriate intervals in the circumferential direction. You may comprise so that it may become ring shape or torus-like arrangement | positioning as a whole.
[0046]
  The bar arrangements 59, 60, 61 in each row are assembled into independent frame structures by the bar arrangement work of the RCCV inner bar arrangement 11, and the load of the bar arrangements 59, 60, 61 in each row is applied to the RCCV liner. 10 is set so as not to act. The reason why the load of the RCCV inner reinforcement 11 is not applied to the RCCV liner 10 is that the inner reinforcement load is very large, whereas the RCCV liner 10 has a thin structure with a thickness of 6.4 mm, for example, and its rigidity strength is small. It is. If the inner bar arrangement load is applied to the RCCV liner 10 as a load having a moment, the RCCV liner 10 and the cutty material 13 that is a component in the liner axial direction may buckle, but the inner bar arrangement load does not act. This can prevent this buckling.
[0047]
  When the RCCV inner bar arrangement 11 is installed on the outer peripheral side of the RCCV liner 10 and the attachment and assembly of the RCCV inner bar arrangement 11 are completed, the RCCV liner 10 and the RCCV inner bar arrangement 11 are suspended in the construction site. The suspension is performed by operating the lifting machine 65 to move the lifting balance 66 up and down. The suspension balance 66 is used to lift and move the RCCV liner 10 and the RCCV inner bar arrangement 11 at the same time independently, to hang them, and to hang them in the construction site. The lifting machine 65 is a large lifting machine capable of lifting 1000 tons, for example.
[0048]
  FIG. 4 is a cross-sectional view showing a state in which the pressure suppression chamber liner 16 and the RCCV inner bar arrangement 11 as the cylindrical portion liner that is the first stage of the RCCV liner 10 are suspended on the reactor building mat 4.
[0049]
  An inner mat differential bar 63 connected to the RCCV inner bar arrangement 11 is planted in the reactor building mat 4. The mat difference bar 63 of the RCCV inner bar arrangement 11 has a diameter of about 50 mmφ, for example, and the innermost vertical bar 67 is formed long. It is set in a staircase shape that is gradually shorter toward the row and outward. Reference numeral 68 denotes a horizontal bar of the mat difference bar 63.
[0050]
  On the other hand, the longitudinal reinforcement 57, 57, 57 in each row of the RCCV inner reinforcement 11 suspended at the construction site is longer in the innermost longitudinal reinforcement 57 due to the staircase shape of the frame 55. The shape is set to be gradually shorter toward the third and third rows.
[0051]
  Thus, the connection between the RCCV inner mat bar 63 and the RCCV inner bar arrangement 11 from the reactor building mat 4 is performed by using an arrangement bar 70 as shown in FIG.
[0052]
  As shown in FIG. 4A, first, the bar arrangement 70 is provided in the innermost first row (first stage). The joint bar arrangement 70 in the first row is constituted by assembling the vertical bar arrangement 71 and the horizontal bar arrangement 72, but first, the existing mat differential bar 63 of the reactor building mat 4 and the RCCV inner bar arrangement 11 suspended. The vertical bar arrangement 71 in the first row corresponding to the interval is inserted, and the RCCV inner mat differential bar 63 and the RCCV inner bar arrangement 11 are connected by a mechanical joint or a grout joint using the reinforcing bar coupler 73 as the bar connecting means. The vertical reinforcing bars 57 and 67 are sequentially connected. The RCCV inner mat difference bar 63 and the RCCV inner bar arrangement 11 are sequentially connected by the bar arrangement coupler 73 using the vertical bar arrangement 71 of the bar arrangement 70, and the coupling portion is connected. After connecting the vertical bars 71 of the RCCV inner mat bar 63 and the RCCV inner bar 63 using the vertical bar 71 of the first bar bar 70 and the bar coupler 73, The horizontal reinforcement 72 is attached to and integrated with the vertical reinforcement 71 of the reinforcement 70, and the joint reinforcement 70 is assembled.
[0053]
  After connecting the first row RCCV inner mat difference bar 63 and the RCCV inner bar arrangement 11 with the first row of bar arrangement bars 70, the second and third rows of bar arrangement bars 70 and 70 are connected to the first row. The RCCV inner mat bar 63 and the RCCV inner bar 11 in each row are sequentially connected by the connecting bar 70 in the same row.
[0054]
  Since the joint reinforcements 70, 70, 70 of the joint part gradually expand from the first row to the second row, the third row and the outside (radially outward), the joint reinforcement 70 of each row The insertion of the vertical reinforcing bars 71, the tightening by the reinforcing bar coupler 73, or the injection of the grout and the attachment of the horizontal reinforcing bars 72 can be carried out smoothly and smoothly without hindering other rows.
[0055]
  In addition, after the RCCV liner 10 and the RCCV inner bar arrangement 11 are hung on the reactor building mat 4 by using the lifting machine 65, the RCCV inner bar arrangement 11 is suspended by the lifting balance 66 of the lifting machine 65 for several days. In this suspended state, the RCCV inner mat differential bar 63 and the RCCV inner bar arrangement 11 are engaged.
[0056]
  After the RCCV inner bar arrangement 11 is connected to the RCCV inner mat bar 63 from the reactor building mat 4 using the mating bar arrangement 70 and the coupling is completed, the RCCV inner bar arrangement 12 is attached to the outside of the RCCV inner bar arrangement 11. Assembling the work scaffold 75 for use, the RCCV outer bar arrangement work is started.
[0057]
  The RCCV outer bar arrangement 12 is arranged outside the RCCV inner bar arrangement 11 using the work scaffold 75 in the same manner as the RCCV inner bar arrangement 11, and from the vertical bar arrangement 76 and the horizontal bar arrangement 77 within the construction site. The cylindrical body bar arrangement 79, 80, 81 is assembled and arranged concentrically, and the bar arrangement work of the RCCV outer bar arrangement 12 is completed. It is also possible to assemble the RCCV outer bar arrangement integrally in advance on the ground, hang it on the construction site using the lifting machine 65, and hang it on the outside of the RCCV inner bar arrangement 11 for installation.
[0058]
  When the RCCV outer bar arrangement work is completed, an outer mold 82 is attached to the outer side of the RCCV outer bar arrangement 12, and concrete is put in a space surrounded by the outer mold 82 and the pressure suppression chamber liner 16 of the RCCV liner 10. To cast. At that time, the RCCV liner 10 is a cylindrical portion liner, and the pressure suppression chamber liner 16 itself constitutes an inner mold. When the concrete is poured, the pressure suppression chamber liner 16 is integrated with the RCCV inner reinforcement 11 and the RCCV outer reinforcement 12 with the assistance of the cutty material 13 and is reinforced.
[0059]
  Further, in parallel with the reinforcement work of the RCCV outer reinforcement 12 and the concrete placement work, the reactor pressure vessel support pedestal 5 is installed on the reactor building mat 4 of the reactor building 1. The support pedestal 5 is separately divided into at least an upper pedestal upper stage 5a and a lower stage 5b on the ground (surface plate) in the vicinity of the factory or construction site, and is carried into the reactor building 1 and fixed.
[0060]
  The pedestal upper stage 5a is integrally assembled with a diaphragm floor liner module (hereinafter referred to as DF liner module) 85 as described later in FIG. In the DF liner module 85, the disk-shaped diaphragm floor reinforcing body 86 constituting the diaphragm floor 8, the seal plate 30, the built-in support structure 87, and the diaphragm liner 17 are integrally assembled to form an integral structure. The DF liner module 85 is installed on the pressure suppression chamber (suppression chamber) liner 16 of the pedestal lower stage 5b and the RCCV liner 10 and installed. The DF liner module 85 is integrally provided with an upper pedestal stage 5 a on the inner peripheral side, and the upper pedestal stage 5 a is installed on the lower pedestal stage 5 b of the RPV support pedestal 5. The built-in support structure 87 is configured by radially arranging a large number of built-in support structures 88 that are strength members, and the DF reinforcing bar 86 is a combination of radial reinforcing bars 89a and circumferential reinforcing bars 89b.
[0061]
  The DF liner module 85 installed on the pressure suppression chamber liner 16 has its ring-shaped diaphragm liner 17 fixed by welding all around. A dry well liner 27 as a second stage of the RCCV liner 10 is fixed on the diaphragm liner 17 by welding all around. The dry well liner 27 is welded and fixed to the diaphragm liner 17 of the DF liner module 85 from the inner peripheral side and the outer peripheral side over the entire periphery.
[0062]
  The dry well liner 27 which is a cylindrical portion liner as the second stage of the liner of the RCCV liner 10 and the dry well inner reinforcement 90 as an RCCV inner upper reinforcement outside the liner are the RCCV liner 10 and the RCCV liner 10 shown in FIGS. It has the same structure as the RCCV inner bar arrangement 11 and is assembled on the ground (yard surface) in the factory or in the vicinity of the construction site in the same manner as shown in FIGS. The assembled dry well liner 27 and dry well inner bar arrangement 90 are suspended by a suspension balance 66 of a lifting machine 65 shown in FIG. 3, suspended on the diaphragm floor 8 of the reactor building 1, and suspended by the suspension balance 66. The drywell liner 27 is welded to the diaphragm liner 17 all around while maintaining the installed state.
[0063]
  Although all-around welding of the drywell liner 27 to the diaphragm liner 17 is performed from both the inner and outer peripheral sides as required by nuclear laws, the strength is sufficient only from either one. Until the welding operation of the dry well liner 27 is completed, the RCCV bar arrangement work standing up to the bottom of the diaphragm floor 8 cannot be performed. Since it takes several tens of days to weld the dry well liner 27 and the joint operation of the dry well inner reinforcement 90, it is impractical to keep the dry well inner reinforcement 90 suspended by the lifting machine 65 for several tens of days. It is.
[0064]
  Therefore, as shown in FIG. 5, a temporary support column 91 is prepared, and the suspension of the dry well inner bar arrangement 90 is used as a shoulder for the temporary support column 91. The shoulder support for the temporary support column 91 is obtained by suspending the dry well liner 27 and the dry well inner reinforcement 90 which is the inner upper reinforcement of the RCCV, and immediately suspending the dry well inner reinforcement 90 to the temporary support 91 side. Done.
[0065]
  The temporary support column 91 is erected from the concrete surface between the RCCV inner bar arrangement 11 and the outer bar arrangement 12, which has been completed to the bottom of the diaphragm floor 8. A plurality of temporary columns 91, for example, about 20, are set up at appropriate intervals in the circumferential direction. The temporary support column 91 is provided at a position where there is no hindrance to the welding operation of the dry well liner 27 suspended from the suspension arm 92 at the top and the joint operation of the dry well inner bar arrangement 90.
[0066]
  After the completion of the welding operation of the dry well liner 27, a joint operation between the dry well inner reinforcement 90 which is the RCCV inner upper reinforcement and the existing RCCV inner lower reinforcement 11 which is the RCCV inner reinforcement is performed. In this case, the bar arrangement is formed in a stepped manner in the same manner as the bar arrangement 70 shown in FIG. 4, and is completely the same as that of the inner mat differential bar 63 and the RCCV inner bar 11 of the pressure suppression chamber liner 16. Work is performed in the same procedure. After completion of the joint bar arrangement work of the dry well inner bar arrangement 90, a working scaffold (not shown) between the dry well outer bar arrangements 93 which are the RCCV outer upper bar arrangement is assembled. This work scaffold is assembled and the RCCV outer bar arrangement work is started, and the dry well outer bar arrangement 93 is assembled on the outer peripheral side of the dry well inner bar arrangement 90. At that time, the temporary support column 91 is removed before the RCCV outer bar arrangement work. However, if there is no problem with the outer bar arrangement work, it may be left as it is and embedded in the concrete.
[0067]
  As shown in FIGS. 2 to 5, the RCCV inner reinforcement 11 is assembled on the outside of the RCCV liner 10 in advance on the ground (on the yard surface plate) near the factory or the construction site. After the assembly, the RCCV liner 10 (including the dry well liner 27) and the inner reinforcement 11 (including the dry well inner reinforcement 90) are suspended at the same time and suspended in the construction site. This method of installing the RCCV liner 10 and the RCCV inner bar arrangement 11 allows the RCCV inner bar arrangement 11 to be suspended without buckling the RCCV liner 10. For this reason, it is possible to eliminate the assembly of the scaffold for RCCV inner bar arrangement work and the RCCV inner bar arrangement work in the construction site, and the construction process can be greatly shortened accordingly.
[0068]
  Also, the suspended RCCV inner reinforcement 11 and the RCCV inner reinforcement 11 in the construction site (in the case of the pressure suppression chamber liner 16, the differential reinforcement 63, and in the case of the dry well liner 27, the inner side of the RCCV constructed to the bottom of the diaphragm floor 8 By implementing the mechanical joint or the grout joint in such a manner that the joint shape of the bar arrangement 11) is gradually expanded with different lengths for each stage, the joint bar arrangement work can be easily performed.
[0069]
  Further, the dry well liner 27 and the dry well inner reinforcement 90 which is the inner upper reinforcement of the RCCV are suspended in the construction site, and the suspended RCCV inner upper reinforcement 90 is attached to the lower well during the welding of the dry well liner 27. In the method of installing and supporting the temporary support column 91 from the RCCV concrete cross section, the hoisting machine 65 can be separated immediately after the suspended RCCV inner upper reinforcement bar 90 is replaced with the temporary support column 91. In addition, welding of the dry well liner 27 and bar arrangement work can be performed without hindering the suspended upper RCCV inner bar arrangement 90.
[0070]
  (2) RCCV diaphragm support structure
  6 and 7 show a diaphragm floor liner module (DF liner module) 85 constituting the RCCV diaphragm section. The DF liner module 85 is assembled on the ground near the factory or construction site, for example, on a yard surface plate. A plurality of types of yard surface plates are prepared, such as a surface plate for the diaphragm liner module 85, a surface plate for the RCCV liner 10 and the RCCV inner reinforcement 11 and a surface plate for the reactor pressure vessel support pedestal 5.
[0071]
  The DF liner module 85 is configured by assembling the diaphragm liner 17, the diaphragm floor reinforcing bar 86, the seal plate 30, and the built-in support structure 87 into an integral structure. As shown in FIGS. 6 and 7, the diaphragm floor reinforcement 86 is a combination of radial reinforcement 89 a and circumferential reinforcement 89 b, and a reactor pressure vessel ( The pedestal upper stage 5a of the RPV) support pedestal 5 is provided integrally.
[0072]
  The pedestal upper stage 5a of the RPV support pedestal 5 is installed on the cylindrical pedestal lower stage 5b, and an outer peripheral support step 95 is formed between the pedestal lower stage 5b. On the support step 95, the inner periphery of the DF liner module 85 is supported.
[0073]
  A temporary support column 96 that can be removed as a temporary support means is erected on the outer peripheral support step 95 of the RPV support pedestal 5. The temporary support column 96 is installed on the upper surface of the RPV support pedestal 5 and supports the inner end portion of the built-in support structure 87 of the DF liner module 85. The built-in support structure 86 is configured by arranging a large number of built-in support structures 88 radially, and the outer ends of the built-in support structures 88 are coupled to and supported by the shear plate inner side 97 of the diaphragm liner 17. The shear plate material 98 of the diaphragm liner 17 radially penetrates the liner and protrudes on both sides to form a shear plate inner 96 and a shear plate outer 99. Temporary support means 100 such as a temporary material or a jack is inserted between the shear plate outer side 99 of the diaphragm liner 17 and the cut tee material 13 of the pressure suppression chamber liner 16 to deform or bend the shear plate material 98 or the diaphragm liner 17. Is prevented.
[0074]
  On the other hand, the built-in support structure 88 of the DF liner module 85 is formed of a steel material such as H-shaped steel or I-shaped steel, and supports the steel plate seal plate 30 below the diaphragm floor reinforcing body 86, and the RCCV diaphragm portion. It is a structural material that supports all loads. When the DF liner module 85 is suspended, the built-in support structure 87 is suspended by the lifting machine 65, and the RCCV diaphragm portion is suspended in the construction site.
[0075]
  FIGS. 7A and 7B are partial sectional views of the RCCV diaphragm portion suspended in the construction site. The integrated DF liner module 85 that is grounded and integrated on the ground is suspended when the pressure suppression chamber liner 16 and the RPV support pedestal 5 are completely installed at a predetermined position, for example, below the DF liner module 85. Is included. When the DF liner module 85 is suspended, the built-in support structure 87 of the DF liner module 85 is suspended and the RCCV diaphragm portion is suspended at the construction site.
[0076]
  In the DF liner module 85 suspended at the construction site, the RPV support pedestal 5 side supports the built-in support structure material 88 by the temporary support column 96, and the diaphragm liner 17 side connects the built-in support structure material 88 to the shear plate inner side 96. Is supported by
[0077]
  With the support structure of the RCCV diaphragm portion, the load of the DF liner module 85 of an integral structure can be transmitted to the pressure suppression chamber liner 16 vertically. For example, if an inner bracket is attached to the pressure suppression chamber liner 16 to stand a temporary support column and the RCCV diaphragm portion is supported by the temporary support column, the moment load of the RCCV diaphragm portion is large. On the other hand, since the RCV liner 10 itself is thin and has low rigidity, the RCCV liner 10 and the cutty material 13 as an axial structural member thereof may buckle under a large moment load of the RCCV diaphragm portion. . However, in the load supporting structure of the RCCV diaphragm portion shown in FIGS. 7A and 7B, the diaphragm portion load is transmitted to the pressure suppression chamber liner 16 vertically, so that the RCCV liner 10 and the cutty material 13 are buckled or deformed. Can be effectively prevented.
[0078]
  After the RCCV diaphragm portion is supported by the RPV support pedestal 5 and the pressure suppression chamber liner 16 of the RCCV liner 10, the pressure suppression chamber liner 16 and the diaphragm liner 17 are welded. The diaphragm liner 17 is first welded from the inside. After the inner welding is completed and the load of the RCCV diaphragm portion can be transmitted vertically to the pressure suppression chamber liner 16 through the diaphragm liner 17, the pressure suppression chamber liner 16. The temporary material or jack inserted between the cutty material 13 and the shear plate material 98 of the diaphragm liner 17 is removed, and outer welding is performed over the entire circumference.
[0079]
  In the support structure of the RCCV diaphragm portion shown in FIG. 6 and FIG. 7, the diaphragm liner 17, the diaphragm floor reinforcement 86, the seal plate 30, and the inner support structure 87 are made into a unitary structure on the ground beforehand. Assemble and DF liner module 85 is grounded. The ground assembled DF liner module 85 has about 1000 tons, and is suspended from the construction site using a large lifting machine 65 as it is suspended as an integrated structure.
[0080]
  The DF liner module 85 supports the suspended load by the cutty material 13 and the shear plate material 98 of the pressure suppression chamber liner 16. With this support structure, the load of the DF liner module 85 can be applied to the pressure suppression chamber 16 in the vertical direction, and the pressure suppression chamber liner 16 can be suspended without being buckled. It is possible to eliminate the assembly work of the RCCV diaphragm at the construction site where the working environment is bad, and it is possible to greatly shorten the construction process. Reference numeral 101 denotes a reinforcing bar coupler as a reinforcing bar attaching means for fixing the radial reinforcing bar 89A of the diaphragm floor reinforcing body 86 to the diaphragm liner 17.
[0081]
  After the DF liner module 85 is suspended and installed, concrete placement work is performed to complete the diaphragm floor 8. After the cast concrete has developed its strength, the internal structure starts to be transferred into the upper dry well 28 and the DF temporary support column 96 is removed.
[0082]
  When the internal structure of the dry well 28 has been taken in and the concrete placement of the cylindrical portion 6 of the RCCV 2 has reached the top, the construction of the RCCV top slab 7 is started as shown in FIGS. To do. The top slab 7 includes a top slab module 104 in which a steel plate top slab liner 37, an RCCV internal flange 38, a top slab reinforcement member 102, and a built-in support structure 103 are integrally assembled. The top slab 7 is structured to be cantilevered from the RCCV cylindrical portion 6.
[0083]
  Prior to the construction of the top slab 7, the reactor shielding wall 30 is installed in the upper dry well 28.
[0084]
  (3) Modification of support structure of RCCV diaphragm
  FIGS. 8A and 8B show a modification of the support structure of the RCCV diaphragm portion. This RCCV diaphragm support structure employs an external support structure 105 instead of the internal support structure material of the RCCV diaphragm.
[0085]
  In the RCCV diaphragm section, a diaphragm floor liner module (DF liner module) 85A is previously assembled on the ground near a factory or a construction site, for example, on a yard surface plate. The DF liner module 85A is obtained by assembling the diaphragm liner 17, the diaphragm floor reinforcement 86, the seal plate 30, and the external support structure 105 on the ground in an integral structure module structure. The diaphragm floor reinforcement 86 is a disk-like assembly of radial reinforcement 89a and circumferential reinforcement 89b, and has a multilayer structure.
[0086]
  The outer end portion of the radial reinforcing bar 89a of the diaphragm floor reinforcing member 86 is connected to and integrated with the ring-shaped or sleeve-shaped diaphragm liner 17 by the reinforcing bar coupler 101 as the reinforcing bar mounting means. Of the diaphragm floor reinforcing body 86, the radial reinforcing bars 89a located at the uppermost layer and the lowermost layer are connected to each other at the inner end side and are formed in a U-shape to be reinforced.
[0087]
  A seal plate 30 made of steel plate is interposed below the diaphragm floor reinforcement 86 on the disk, and this seal plate 30 is supported on the upper surface of the external support structure 105. The external support structure 105 has a large number of external support structures 106 arranged in a radial pattern, and the structure material 106 is formed of a steel mold such as H-shaped steel or I-shaped steel. The outer end portion of the outer support structural member 105 is coupled to the diaphragm liner 17 by connecting means such as a gusset plate 107, and the inner end portion thereof is mounted on a mounting bracket 108 protruding from the upper outer peripheral portion of the reactor pressure vessel support pedestal 5. It is configured to be supportable.
[0088]
  Further, the pedestal upper stage 5a of the reactor pressure vessel support pedestal 5 is integrally provided on the inner peripheral side of the DF liner module 85A. Composed.
[0089]
  The DF liner module 85A is assembled in a disk-like integrated structure on the ground near a factory or construction site with a good work environment. The assembled DF liner module 85A has a weight of, for example, about 1000 tons, and has a large lift. It is suspended on a suspension balance 66 of a heavy machine 65 and carried into a construction site. FIGS. 8A and 8B are cross-sectional views of the DF liner module 85A suspended in the construction site. The external support structure 106 is suspended from the DF liner module 85A and suspended in the construction site. The external support structural member 106 supports the seal plate 30 on its upper surface to support the entire load of the RCCV diaphragm portion.
[0090]
  The DF liner module 85A, in which the external support structural member 106 is suspended and suspended in the construction site, is supported by a mounting bracket 108 whose RPV support pedestal 5 side protrudes from the outer periphery of the pedestal, and the diaphragm liner 17 side is the cutty material 13. The pressure suppression chamber liner 16 reinforced by the above is supported via a diaphragm liner 17.
[0091]
  As shown in an enlarged view in FIG. 8B, the diaphragm liner 17 side is reinforced by providing a ring or sleeve-like diaphragm liner 17 with a shear plate material 98. Temporary support means 100 such as a temporary material or a jack is inserted between the outer side 99 of the diaphragm liner 17 and the cutty material 13 of the pressure suppression chamber liner 16. The diaphragm liner 17 is temporarily supported on the cutty material 13 via a shear plate material 98.
[0092]
  At this time, the outer end portion of the external support structural member 106 is coupled to the diaphragm liner 17 via the gusset plate 107 and integrated. Accordingly, the outer peripheral side of the suspended DF liner module 85A is suspended by the lifting machine 65, and the pressure suppression chamber liner is provided by the temporary support means 100 such as the diaphragm liner 17, the shear plate material 98, the temporary material, or the jack. 16 is temporarily supported.
[0093]
  In a state where the DF liner module 85A is temporarily supported by the pressure suppression chamber liner 16, the diaphragm liner 17 is fixed to the pressure suppression chamber liner 16 by welding all around. First, the diaphragm liner 17 is welded to the pressure suppression chamber liner 16 from the inside. After the inner welding is completed, the load of the RCCV diaphragm portion is transmitted vertically to the pressure suppression chamber liner 16 through the diaphragm liner 17. After the load of the RCCV diaphragm portion can be transmitted in the vertical direction, the temporary support means 100 such as a temporary material or a jack temporarily provided on the cutty material 13 of the pressure suppression chamber liner 16 is removed and removed. After the removal, the diaphragm liner 17 and the pressure suppression chamber liner 16 are welded from the outside over the entire circumference, and the DF liner module 85A is supported and installed on the reactor pressure vessel support pedestal 5 and the pressure suppression chamber liner 16.
[0094]
  After the DF liner module 85A is installed at a required position, concrete is placed on the DF liner module 85A to constitute the RCCV diaphragm portion.
[0095]
  The support structure of the RCCV diaphragm portion shown in this modification is the same as the support structure of the RCCV diaphragm portion shown in FIGS. 6 and 7, and the DF liner module 85 </ b> A is placed vertically to the pressure suppression chamber liner 16. The pressure suppression chamber liner 16 can be suspended without being buckled or deformed. It is possible to eliminate the assembly work of the RCCV diaphragm at the construction site where the working environment is bad, and the construction method can be greatly shortened.
[0096]
  (4) Top slab part of reactor containment vessel
  The top slab module 104 installed on the top of the cylindrical wall 6 of the reactor containment vessel (RCCV) 2 is configured as shown in FIG. 9, and is integrated integrally in advance on the ground near the factory or construction site, for example, on a yard platen. Assembled. As shown in FIG. 9, the top slab module 104 includes a ring-shaped or sleeve-shaped RCCV lower flange 38, a disk-shaped steel plate top slab liner 37, a disk-shaped top slab reinforcement 102, and a top slab upper surface. This is an integral structure in which the skeleton differential muscle 110 and the built-in support structure 103 are integrally assembled in a disk shape or a disk shape.
[0097]
  As shown in FIGS. 9, 10, and 11, the built-in support structure 103 is configured by arranging a large number of built-in support structures 111 that are structural type steel materials such as H-type steel materials or I-type steel materials in a radial pattern. The inner end of each built-in support structure 111 is coupled to the RCCV lower flange 38 and integrated.
[0098]
  As shown in FIG. 11, the RCCV lower flange 38 is provided on a temporary support member 112 as a temporary support means that can be removed and installed at the top of the reactor shielding wall 40, and a lower end outer peripheral flange portion of the RCCV lower flange 38. 38a is fixed to the inner peripheral side of the steel plate top slab liner 37 by welding and integrated. A large number of support columns 113 are erected along the circumferential direction on the inner peripheral end of the top slab liner 37 or the lower end outer peripheral flange 38a of the RCCV lower flange 38, and the support 113 supports the inner end of the built-in support structural member 111. ing.
[0099]
  The built-in support structural member 111 has an outer end extending radially to the RCCV cylindrical portion (cylindrical wall) 6 and supports the top slab liner 37 in a suspended manner. The built-in support structural member 111 is a structural member that supports the entire load of the top slab part. As shown in FIG. 9, the built-in support structure members 111 arranged in a radial pattern may be connected to each other by concentric circumferential reinforcing bars 114 to improve physical and mechanical strength. The circumferential reinforcement 114 is extended in the circumferential direction, and each built-in support structure 111 is assembled in a spider web shape.
[0100]
  Further, the top slab reinforcement 102 is composed of, for example, 38 mmφ top slab orthogonal reinforcement, and is assembled by orthogonally intersecting the vertical and horizontal reinforcement. The top slab reinforcement 102 may be configured by crossing radial reinforcement and circumferential reinforcement in place of vertical and horizontal reinforcement. The top slab reinforcement 102 has a multilayer structure, for example, a three-layer top slab orthogonal reinforcement, provided on both upper and lower sides of the built-in support structure 111.
[0101]
  As shown in FIG. 10 (B) and FIG. 11, the innermost side of the top slab bar arrangement body 102 and the lowermost top slab cross bar arrangement are loop-shaped outermost bars that are U-shaped connection bars. The bars 115 are connected and integrated by a reinforcing bar coupler 116 as a reinforcing bar joint means. At this time, the outermost reinforcement 115 of the orthogonal reinforcement is bent so as not to interfere with the built-in support structure 103 and is provided so as to bypass the built-in support structure 111.
[0102]
  That is, the reinforcing bar arrangement at the support end of the top slab portion on the reactor shielding wall 40 side is as shown in FIGS. 10B and 11, and the inner end of the built-in support structure 111 and the top slab orthogonal reinforcement 102. The loop outermost muscle 115 is formed so as not to interfere. For this reason, a bar arrangement coupler 116 that is a bar arrangement joint is provided near the inner end of the built-in support structure 111, and the top slab orthogonal bar arrangement 102 and the outermost bar 115 are connected to the built-in support structure material using the bar arrangement coupler 116. It is easily processed and attached so as not to interfere with 111. As a result, the built-in support structure 111 can be extended inward to the reactor shielding wall 40 and supported on the reactor shielding wall 40. The temporary support column installed on the upper surface of the reactor shielding wall 40 is removed after the concrete is cast on the top slab portion and the strength of the concrete is developed.
[0103]
  On the other hand, the top slab module 104 assembled and integrated on the ground reaches about 1000 tons, is suspended using a large lifting machine 65, and is suspended in the construction site. At the time of suspension, the reactor shielding wall 40 and the RCCV cylindrical portion 6 are laid up to the top slab connecting portion, and the concrete placement is suspended at the stage where the top placement is completed directly below the top slab portion.
[0104]
  10 and 11 are a plan view and a cross-sectional view showing a state in which the top slab module 104 is suspended in the construction site. Before the top slab module 104 is suspended, the temporary support material 112 is attached to the upper surface of the reactor shielding wall 40 and the temporary support column 117 is attached to the concrete completion surface of the RCCV cylindrical portion 6 for supporting the top slab module 104. In the top slab module 104 suspended at the construction site, the inner and outer ends of the built-in support structure 111 are supported on the outer peripheral side and the inner peripheral side by the temporary support member 112 and the temporary support column 117.
[0105]
  The top slab reinforcement of the suspended top slab module 104 is provided so as not to interfere with the vertical reinforcement 57 of the RCCV cylindrical portion (cylindrical wall) 6. For this reason, the shape of the joint portion between the top slab orthogonal reinforcement 102 of the top slab module 104 and the vertical reinforcement 57 of the RCCV cylindrical portion 6 is configured as shown in FIGS.
[0106]
  The top slab orthogonal reinforcing bar 102 of the top slab module 104 is provided with a reinforcing bar coupler 119 which is a reinforcing bar connecting means in the vicinity of the joint part of the vertical reinforcing bar 57 of the RCCV cylindrical part 6, and the outermost reinforcing bar 119 on the outer peripheral side is formed. It is bent so as to extend in a radial shape and installed so as not to interfere with the vertical reinforcement 57 of the RCCV cylindrical portion 6. By bending the outermost bar arrangement 119 into a square shape from the top slab orthogonal bar arrangement 102 and extending radially, interference with the vertical bar arrangement 57 of the RCCV cylindrical portion 6 when the top slab module 104 is suspended. Can be avoided and can be smoothly suspended and installed on the RCCV cylindrical portion 6.
[0107]
  In the top slab 7 of the reactor containment vessel 2 shown in FIGS. 9 to 11, the top slab module 104 is assembled on the ground near the factory or the construction site. The top slab module 104 assembled in advance on the ground is transported to the construction site by the built-in support structure 111 by a large lifting machine, and is suspended in the construction site. When the top slab module 104 is suspended at the construction site, the top slab orthogonal reinforcement 102 of the top slab module 104 does not interfere with the vertical reinforcement 57 of the RCCV cylindrical portion 6 so that it is the outermost of the top slab orthogonal reinforcement 102. The bar arrangement 119 is bent and set in advance radially. The top slab orthogonal reinforcement 102 is provided with a reinforcement coupler 118 as a reinforcement arrangement means in the vicinity of the joint portion of the RCCV cylindrical portion 6 with the vertical reinforcement 57, and the top slab orthogonal reinforcement is provided via the reinforcement coupler 118. The outermost reinforcing bar 119 is coupled to 102.
[0108]
  The outermost bar arrangement 119 is bent in a U-shape in advance, and the outermost arrangement bar 119 of the top slab orthogonal bar arrangement 102 is a vertical bar arrangement of the RCCV cylindrical portion 5 as shown in FIG. It is hung and set between the longitudinal bars 57 so as not to interfere with the bars 57.
[0109]
  Even if the vertical reinforcements 57, 57 of the RCCV cylindrical portion 6 are raised up to the top slab joint portion by bending the outermost reinforcement 119 of the top slab orthogonal reinforcement 102 radially, the top slab The module 104 can be hung smoothly by reliably preventing interference with the vertical reinforcement 57 of the RCCV cylindrical portion 6.
[0110]
  By suspending the top slab module 104, it is possible to eliminate the joint bar arrangement work on the RCCV cylindrical portion 6. Conventionally, the longitudinal reinforcement 57 of the RCCV cylindrical portion 6 is stopped under the top slab 7, and after the suspension of the top slab portion, the vertical reinforcement 57 of the RCCV cylindrical portion 6 and the fixing portion of the fixing portion of the top slab portion are engaged. Has occurred. By eliminating this joint arrangement work, the construction process of the top slab part can be greatly shortened.
[0111]
  In addition, the top slab module 104 bends the outermost reinforcement 115 of the top slab orthogonal reinforcement 102 in advance so that the outermost reinforcement 115 on the radially inner side does not interfere with the inner end of the built-in support structure 111. . In this case, a bar arrangement coupler 116 as a bar arrangement joint means is provided near the inner end of the built-in support structure 111 so that the assembly bar arrangement work of the top slab bar arrangement 102 can be easily performed. With this bar arrangement coupler 116, the outermost bar arrangement 115 processed so as not to interfere with the built-in support structure material 111 can be detachably attached in advance smoothly and smoothly on the ground, and the upper outer surface of the reactor shielding wall 40 can be attached. There is no need to attach a mounting bracket to the.
[0112]
  Conventionally, a mounting bracket is attached to the outer surface of the reactor shielding wall 40, the inner end of the built-in support structure is supported on the mounting bracket, and the built-in support structure is terminated before the outermost bar arrangement. This prevents interference between the built-in support structure and the outermost reinforcement. However, the conventional support structure for the top slab portion requires a mounting bracket for supporting the built-in support structure material. In addition, the mounting bracket is removed after the construction of the top slab part is completed and the strength of the concrete is developed, but it is troublesome to attach and remove this large mounting bracket to the reactor shielding wall 40 and take a long time. On the other hand, it was difficult to remove the removed mounting bracket.
[0113]
  On the other hand, as shown in FIGS. 9 to 11, the top slab module 104 suspended at the construction site has the inner end portion of the built-in support structure material 111 on the reactor shielding wall 40 via the temporary support material 112. The outer end of the built-in support structural member 111 is supported by a temporary support column 117 erected on the RCCV cylindrical portion 6, and the built-in support structure 111 is stably supported on the outer peripheral side and the inner peripheral side. Each built-in support structural member 111 that supports the entire load of the top slab module 104 constituting the top slab part is suspended on the reactor shielding wall 40 and the RCCV cylindrical part 6 by the suspension of the top slab module 104. It is supported stably via the temporary support column 117.
[0114]
  With the built-in support structure 111 of the top slab module 104 supported by the reactor shielding wall 40 and the RCCV cylindrical part 6, the top slab liner 37 is fixed to the top part of the cylindrical part liner 10 by welding all around from the inside. Concrete is cast after this fixing, and the RCCV top slab 7 is formed.
[0115]
  The RCCV top slab 7 is removed after the temporary support material 112 on the reactor shielding wall 40 is removed after the strength is expressed by the cast concrete. The temporary support column 117 on the RCCV cylindrical portion 6 is embedded in the upper portion of the RCCV cylindrical portion 6 when the concrete is placed, and is left as it is. At this time, since the temporary support material 112 is only installed on the reactor shielding wall 40, the removal work of the temporary support material 112 becomes easy.
[0116]
  (5) Modification of top slab part of reactor containment vessel
  FIG. 12 is an enlarged plan view showing a modification of the top slab portion of the reactor containment vessel 2.
[0117]
  The top slab portion of the reactor containment vessel (RCCV) 2 shown in this modification is an improvement of the reactor shielding wall 40 side of the top slab module 104A. It is the same as the top slab module 104 shown in FIGS. 9 to 11 that the top slab module 104A is prefabricated on the ground near the factory or construction site, and is not different.
[0118]
  The top slab module 104A shown in FIG. 12 bends the inner end portion of the built-in support structure material 111 so that the loop-shaped bar arrangement of the outermost reinforcement of the top slab does not interfere with the inner end portion of the built-in support structure material 111. The inner end portion of the built-in support structure 111 that has been processed and bent is bonded to the RCCV lower flange 38 by bypassing the outermost reinforcement of the top slab and fixed.
[0119]
  Other configurations and operations are not different from those of the RCCV top slab portion shown in FIGS.
[0120]
  (6) Through penetration and hatch mounting structure
  FIG. 13 and FIG. 14 are diagrams showing the attachment structure of the penetration penetration 50 and the hatches 51 and 52 attached to the RCCV liner 10. As shown in FIG. 2, the RCCV liner 10 is provided with a device carry-in / out hatch 51, an entrance / exit hatch 52 for personnel access, and a penetration penetration 50 through which piping, electric cables, instrumentation piping, and the like are passed.
[0121]
  The RCCV liner 10 is integrally assembled by welding on the ground near a factory or a construction site, and is configured in a cylindrical shape or a sleeve shape. The penetration penetration 50 and the hatches 51 and 52 attached to the RCCV liner 10 are temporarily supported by the RCCV liner 10 with an auxiliary material such as a temporary slant until they are suspended in the construction site. After the suspension of the RCCV liner 10 to the construction site is completed, the penetration penetration 50 and the hatches 51 and 52 are temporarily supported using the steel material 120, the wire 121, and the like by the preceding steel frame 1a extending from the reactor building 1 outside the RCCV. Then, remove the temporary diagonal materials.
[0122]
  FIGS. 13 and 14 are views showing a support state in which the penetration penetration 50 and the hatches 51 and 52 attached to the RCCV liner 10 are supported from the preceding steel frame 1a of the reactor building 1. The RCCV liner 10 suspended in the reactor building 1 which is a construction site temporarily supports the penetration penetration 50 and the hatches 51 and 52 on the preceding steel frame 1a of the reactor building 1. By temporarily supporting the preceding steel frame 1a of the nuclear reactor building 1, it is possible to prevent the steel material 120 and the wire 121 from interfering with the RCCV bar arrangement work, and to reduce the complexity of the work.
[0123]
  Conventionally, the temporary member 20 is attached to a penetration penetration or hatch attached to the RCCV liner 10. The temporary member 20 has been replaced one by one so that the temporary member that interferes with the RCCV bar arrangement work is not interfered with when the RCCV bar arrangement work is started.
[0124]
  On the other hand, as shown in FIG. 13 and FIG. 14, the RCV liner 10 is suspended in the reactor building 1 by temporarily suspending the penetration penetration 50 and the hatches 51 and 52 attached to the RCCV liner 10. After completion, the temporary member 20 is removed, and the penetration penetration 50 and the hatches 51 and 52 are temporarily supported by the steel material 120 or the wire 121 suspended from the preceding steel frame 1a of the reactor building 1, thereby interfering with the RCCV bar arrangement work. Can be prevented effectively and in advance, and construction complexity can be reduced.
[0125]
  (7) Reactor containment construction method
  The reinforced concrete reactor containment vessel (RCCV) 2 stored in the reactor building 1 is constructed according to the procedure shown in FIGS.
[0126]
  First, as shown in FIG. 15A, the reactor building mat 4 is laid on the construction site of the reactor building 1, and the mat difference bars 63 project from the reactor building mat 4 in the circumferential direction. As shown in FIGS. 15A and 15B, the mat difference bar 63 includes an inner mat difference line 63a and an outer mat difference line 63b. The inner mat difference bars 63a and the outer mat difference bars 63b are arranged concentrically in a plurality of rows, for example, three rows, with an interval of, for example, 600 mm to 700 mm between the inner side and the outer side. It protrudes in a staircase shape so that it becomes a downward staircase.
[0127]
  As shown in FIG. 15B, an RCCV liner (pressure suppression chamber liner 16 at the first stage of the liner) 10 and an RCCV inner side are arranged on the reactor building mat 4 of the reactor building 1 in which the mat difference bars 63 are installed. Muscle 11 is hung. The suspended RCCV liner 10 is installed on the reactor building mat 4, while the RCCV inner reinforcement 11 is used as a joint reinforcement 70 and reinforcement joint means as shown in FIGS. 4 (A) and (B). Is connected to the inner mat difference bar 63a through the bar arrangement coupler 73. The first row, which is the first stage of the RCCV liner 10, is first joined and joined to the inner mat difference bar 63a over the entire circumference. When the first row is finished, the second row of the RCCV inner bar arrangement 11 and then the third row are joined using the bar arrangement 70 in the same manner.
[0128]
  When joining the RCCV inner bar arrangement 11 to the inner mat difference bar 63a, when the first row, which is the first inner step, is finished, the second row and the third row are joined sequentially. Moreover, in the second and third rows, the distance between the RCCV inner bar 11 and the inner mat differential bar 63a is larger than the first row in a stepped manner, so the RCCV inner bar 11 and the inner mat are arranged. Coordination work with the differential bar 63a can be performed smoothly and smoothly.
[0129]
  In this case, the RCCV inner reinforcement 11 and the RCCV liner (the first-stage pressure suppression chamber liner 16) 10 are assembled on the ground near the factory or on the site, such as a yard surface plate, in a good working environment. It becomes unnecessary to assemble a scaffold and assemble the RCCV inner bar arrangement 11. Since it is not necessary to perform the bar arrangement work for assembling the RCCV inner bar arrangement 11 at the construction site, the work building for the RCCV inner bar arrangement in the reactor building 1 or the dismantling of the assembled work scaffold Is no longer necessary. Therefore, it is possible to efficiently advance the work of arranging the RCCV inner reinforcement 11 and the work of assembling the RCCV liner 10 in parallel with the mat laying work of the reactor building mat 4.
[0130]
  After installing the RCCV 10 and the RCCV inner bar arrangement 11 on the reactor building mat 4, as shown in FIG. 15C, a work scaffold 75 is assembled on the outer periphery side of the RCCV inner bar arrangement 11, and this work scaffold 75 is assembled. The bar arrangement work of the RCCV outer bar arrangement 12 is performed using. The RCCV outer bar arrangement 12 is performed by joining the outer mat bar arrangement bar 63b of the reactor building mat 4, and in this case also, the RCCV outer bar arrangement 12 is performed in the first and second rows. After the bar arrangement work, the second row and the third row are successively arranged. After the outermost outer bar arrangement work is finished, the formwork 22 is applied to the outside of the RCCV outer bar arrangement 12, As shown in FIG. 15D, concrete is placed. Similarly to the RCCV inner bar arrangement 11, the RCCV outer bar arrangement 12 may be assembled in advance on the ground and then suspended and installed in the construction site. In this case, the bar arrangement work at the construction site is simplified.
[0131]
  In this way, the concrete is placed while proceeding with the reinforcement work of the RCCV outer reinforcement 12, and the reactor containment vessel 2 is sequentially started and stacked. In parallel with the startup of the reactor containment vessel 2, the lower pedestal stage 5 b of the reactor pressure vessel (RPV) support pedestal 5 is suspended by the large lifting machine 65 and installed on the reactor building mat 4. This RPV support pedestal 5 is also pre-assembled in the factory or on the ground near the construction site and assembled together.
[0132]
  After the pedestal lower stage 5b of the RPV support pedestal 5 is suspended and installed on the reactor building mat 4, the diaphragm floor (DF) liner module 85 (85A) is attached to the large hoist 65 as shown in FIG. Suspended and suspended on the pressure suppression chamber liner 16 of the PRV support pedestal 5 and RCCV liner 10 and set on the RPV support pedestal 5 and RCCV liner 10.
[0133]
  In this case, the DF liner module 85 is assembled into an integrated structure in a factory having a good working environment or on the ground near the construction site. 6 to 7A and 6B, the DF liner module 85 integrates the diaphragm floor reinforcement 86, the built-in support structure 87, and the diaphragm liner 17, while the RPV support pedestal 5 The pedestal upper stage 5a is built into the inner peripheral side of the DF liner module 85. The DF liner module 85 may be configured as shown in FIG.
[0134]
  The DF liner module 85 is suspended from a large lifting machine 65, transported to a construction site, and suspended in the construction site. In the DF liner module 85, as shown in FIGS. 7A and 7B, the inner end of the built-in support structure 88 is supported on the top of the RPV support pedestal 5 via a temporary support column 96. On the other hand, the outer end portion of the inner supporting structure 88 is coupled to the diaphragm liner 17 via a shear plate member 98, and the RCCV liner 16 is welded to the RCCV liner 16 from the inner peripheral side and the outer peripheral side, thereby the RCCV. Vertically supported on the liner 16. During this all-around welding, the DF liner module 85 is held in a suspended state so that no module load is applied by the lifting machine 65, and the DF liner module 85 is supported by the lifting machine 65. After the entire circumference welding is completed, the DF liner module 85 is released from the lifting machine 65 and supported by the RPV support pedestal 5 and the pressure suppression chamber liner 16.
[0135]
  In this manner, concrete placement is performed on the DF liner module 85 in a state where the suspended DF liner module 85 is supported on the RPV support pedestal 5 and the RCCV liner 10. After the cast concrete exhibits concrete strength, the temporary support means 100 such as a temporary member or a jack shown in FIGS. 7A and 7B is removed and removed. In this way, the diaphragm floor 8 that divides the inside of the reactor containment vessel 2 into an upper dry well 28 and a lower pressure suppression chamber 25 is formed.
[0136]
  While the diaphragm floor 8 is formed in the reactor containment vessel 2, the cylindrical portion 6 of the reactor containment vessel 2 is casted with concrete and raised up below the diaphragm floor 8, as shown in FIG. 15 (F). As described above, the temporary support column 91 is erected on the concrete placed outside the RCCV liner 10. A plurality of, for example, 20 temporary columns 91 are installed on the outer peripheral side of the RCCV liner 10 along the circumferential direction and installed.
[0137]
  On the other hand, after the DF liner module 85 is suspended in the reactor building 1 and the DF liner module 85 is installed to form the diaphragm floor 8, the RCCV liner (the second-stage drywell liner 77) 10 and the RCCV inner layout are arranged. The dry well inner bar arrangement 90 that is a line is suspended by the large lifting machine 65 and suspended on the diaphragm floor 8.
[0138]
  The suspended RCCV liner 10 (dry well liner 27) is welded to the diaphragm liner 17 from the inner peripheral side and the outer peripheral side while being suspended, and the dry well liner 27 is placed on the diaphragm liner 17. Installed and secured. On the other hand, the dry well inner bar arrangement 90 suspended together with the dry well liner 27 is switched from the support by the lifting machine 65 to the support by the temporary support column 91 before the dry well liner 28 is transferred to the outer periphery welding. The temporary support column 91 is supported.
[0139]
  Using the existing RCCV inner bar arrangement 11 with the dry well inner bar arrangement 90 supported by the temporary support column 91 and the same arrangement bar arrangement and bar arrangement as shown in FIGS. 4 (A) and 4 (B) Are connected to each other and integrated. The dry well liner 27 and the dry well inner bar arrangement 90 constitute the upper stage of the RCCV liner and the upper upper bar arrangement of the RCCV, as shown in FIG. Board) in advance. The ground well dry liner 27 and the dry well inner reinforcement 90 are suspended from a large lifting machine 65, transported to a construction site, and simultaneously suspended at a predetermined position in the construction site.
[0140]
  As shown in FIG. 15G, the dry well inner bar arrangement 90 is suspended from the existing RCCV inner (lower) bar arrangement 11 and a not-shown joint arrangement and arrangement as shown in FIG. They are joined and integrated by muscular joints. After joining the dry well inner bar arrangement 90 which is the RCCV inner upper bar arrangement to the existing RCCV inner (lower) bar arrangement 11, assembling a work scaffold on the outer peripheral side of the dry well inner bar arrangement 27 as necessary, The bar arrangement work of the dry well outer bar arrangement 93 is performed.
[0141]
  The dry well outer bar arrangement 93 constitutes an RCCV outer upper bar arrangement, and the dry well outer bar arrangement 93 is also assembled in a cylindrical shape or a sleeve shape by combining the vertical bar arrangement and the horizontal bar arrangement. With the progress of the bar arrangement work of the dry well outer bar arrangement 93 or after the bar arrangement work is completed, the mold 22 is applied to the outer peripheral side of the dry well outer bar arrangement 93, and the mold 22 and the dry well liner 27 are connected to each other. Concrete is placed between them, and the cylindrical portion 6 of the reactor containment vessel 2 is piled up. At this time, the dry well liner 27 constitutes the inner peripheral form 22.
[0142]
  During construction of the cylindrical portion 6 of the reactor containment vessel 2, the reactor shielding wall 40 is erected and installed on the diaphragm floor 8 corresponding to the RPV support pedestal 5. In a state where the reactor shielding wall 40 is fixed on the diaphragm floor 8, as shown in FIG. 15 (H), the top slab module 104 is suspended by using a large lifting machine 65. It is supported on the reactor shielding wall 40 and the temporary support column 117 of the RCCV2.
[0143]
  The top slab module 104 is configured as shown in FIGS. 9 to 11, and the inner end portion of the built-in support structure 111 that supports the total load of the top slab module 104 is provided with the temporary support material 112 on the reactor shielding wall 40. The outer end portion is supported by a temporary support column 117 rising from the cylindrical portion 6 of the RCCV 2 and is supported on the inner peripheral side and the outer peripheral side. Concrete is placed in a state where the top slab module 104 is supported on the reactor shielding wall 40 and the cylindrical portion 6 of the RCCV2.
[0144]
  After the concrete is placed, the strength of the concrete is expressed and the temporary member 117 is removed from the reactor shielding wall 40 and removed. On the other hand, the temporary support column 117 erected on the cylindrical portion 6 of the RCCV 2 is buried by placing concrete and remains as a strength member in the cylindrical portion 6.
[0145]
  According to the construction method of the reactor containment vessel 2, the RCCV inner arrangement mainly including the RCCV liner 10 having the pressure suppression chamber liner 16 and the drywell liner 27, the RCCV inner (lower) reinforcing bar 11 and the inner upper reinforcing bar 91 is used. The streak 11, the diaphragm floor liner module 85 (85A), the reactor pressure vessel support pedestal 5, the reactor shielding wall 40, and the top slab module 104 are all located in the factory having a good working environment or near the construction site of the reactor building 1. It can be assembled on the ground, and in the RCCV construction work, the work at the construction site where the working environment is bad can be greatly reduced, and the efficiency and safety of the work of the RCV building work can be ensured. In addition, work at construction sites with poor working environments can be significantly reduced, and work on the ground near factories or construction sites with good working environments can be performed by constructing the reactor building 1 using a plurality of yard plates. Simultaneous progress can be made in parallel. Therefore, the RCCV construction work can be significantly shortened, and the construction period can be set to one year and several months, for example, about one year and eight months, for example, even with a 1.4 million KW (1400 MW) class reactor. Can be shortened by several months.
[0146]
  In the method of constructing the reactor containment vessel, after the RCCV liner is suspended at a predetermined position on the construction site, the penetration penetration and the hatch attached to the RCCV liner are supported from the preceding steel frame of the reactor building. It is possible to reliably and effectively prevent interference with the RCCV bar arrangement work at the site, reduce the complexity of construction work, and improve the efficiency and efficiency of construction work.
  According to this reactor containment vessel construction method, after the RCCV liner is suspended at a predetermined position on the construction site, the penetration penetration and hatch attached to the RCCV liner are supported from the preceding steel frame of the reactor building. It is possible to reliably and effectively prevent interference with the RCCV bar arrangement work at the site, reduce the complexity of construction work, and improve the efficiency and efficiency of construction work.
[0147]
【The invention's effect】
  According to the present inventionConstruction method of reactor containment vesselCan greatly reduce the work in the construction site of the reactor containment vessel (RCCV) construction work, and can improve the efficiency, efficiency and safety of the RCCV construction work, and eventually the RCCV construction The construction process can be greatly shortened and the construction period can be greatly shortened.
[0148]
  Further, according to the present inventionConstruction method of reactor containment vesselIn the RCCV liner, the RCCV inner bar arrangement was assembled independently on the ground in advance, and the RCCV liner and inner bar arrangement were simultaneously suspended and installed at a predetermined position on the construction site. RCCV inner bar arrangement work (scaffolding assembly, bar arrangement, scaffold dismantling) can be reduced to shorten the RCCV construction process and the construction period significantly.it can.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of a reactor building that houses a reactor containment vessel according to the present invention.
FIG. 2 is a perspective view showing an arrangement relationship between an RCCV liner and an RCCV inner bar arrangement constituting a cylindrical portion of a reactor containment vessel according to the present invention.
FIG. 3 is a partial longitudinal sectional view showing an assembly example of an RCCV liner and an RCCV inner bar arrangement assembled on the ground near the construction site.
FIGS. 4A and 4B are cross-sectional views showing an example of installation of an RCCV liner and an RCCV inner bar arrangement suspended in a construction site, and an engagement between the RCCV inner bar arrangement and a mat difference bar;
FIG. 5 is a cross-sectional view showing the shape of the dry well liner, which is an RCCV liner, and the inner bar arrangement when suspended at the construction site.
FIG. 6 is a perspective view showing a state in which diaphragm floor (DF) liner modules installed in a reactor containment vessel according to the present invention are assembled on the ground in advance into an integrated structure.
7A is a view showing a state in which a DF liner module of an integral structure is suspended in a construction site, and FIG. 7B is an enlarged cross-sectional view showing a portion A of FIG. 7A.
8A is a view showing a modification of the DF liner module assembled in the reactor containment vessel according to the present invention, and FIG. 8B is an enlarged cross-sectional view of a portion B of FIG. 8A.
FIG. 9 is a perspective view showing a state in which the RCCV top slab module covering the top of the reactor containment vessel according to the present invention is assembled on the ground in advance into an integrated structure.
10A is a partial plan view of the top slab module shown in FIG. 9, FIG. 10B is an enlarged plan view showing a portion B of FIG. 10A, and FIG. The top view which expands and shows the C section of (A).
FIG. 11 is a cross-sectional view showing the RCCV top slab module of FIG. 9;
FIG. 12 is a plan enlarged view of the RCCV top slab module on the reactor shielding wall side, showing a modification of the top slab module covering the top of the reactor containment vessel according to the present invention.
FIG. 13 is a cross-sectional view showing a state in which a penetration penetration and a hatch attached to an RCCV liner of a reactor containment vessel according to the present invention are supported from a preceding steel frame.
14 is a side view taken along line XIV-XIV in FIG.
FIGS. 15A to 15H are process diagrams schematically showing a construction procedure of a containment vessel according to the present invention.
FIG. 16 is a cross-sectional view showing the configuration of a conventional nuclear reactor containment vessel (RCCV).
FIG. 17 is a cross-sectional view showing the construction work of a conventional RCCV cylindrical portion at the construction site of the reactor building.
FIG. 18 is a cross-sectional view showing a conventional RCCV diaphragm floor installation work.
FIG. 19 is a cross-sectional view showing a conventional RCCV top slab installation work.
[Explanation of symbols]
1 Reactor building
2 Reinforcement concrete reactor containment vessel (RCCV)
3 Reactor pressure vessel
4 Reactor building mat
5 Reactor pressure vessel support pedestal (RPV support pedestal)
6 RCCV cylindrical wall (cylindrical part)
7 RCCV upper floor (top slab)
8 Diaphragm floor
10 Steel liner (RCCV liner, cylindrical liner)
11 Inside reinforcement (RCCV inside lower reinforcement)
12 Outer reinforcement
13 Cutty wood
15 Liner 1st stage (Liner element)
16 Pressure suppression chamber liner (cylindrical liner)
17 Diaphragm liner
18 Penetration
19 Hatch
20 Temporary materials
22 Outside formwork
23 RCCV bottom liner
24 Pressure suppression room access tunnel
25 Pressure suppression chamber
26 Liner 2nd stage (Liner element)
27 Drywell liner (cylindrical liner)
28 Drywell
30 Seal plate
31 Reinforced concrete
33 Temporary support structure
34 Reinforcement
35 Reinforcing bar coupler
37 Top Slab Liner
38 RCCV internal flange
39 Reinforced concrete (top slab concrete)
40 Reactor shielding wall
41 Support bracket
43 prop
44 Orthogonal reinforcement (top slab reinforcement)
45 Built-in support structure
46 Coordination section bar arrangement
50 penetration penetration
51 Equipment hatch
52 Entrance hatch
54 Scaffolding
55 frame
56 Liner receptacle
57 Vertical reinforcement
58 Lateral reinforcement
59, 60, 61 Bar arrangement
63 Inside mat differential streak
65 Lifter
66 Hanging Balance
67 Vertical reinforcement
68 Lateral reinforcement
70 Mating reinforcement
71 Vertical reinforcement
72 Lateral reinforcement
73 Reinforcement coupler (reinforcement joint means)
75 Working scaffold
76 Vertical reinforcement
77 Lateral reinforcement
79, 80, 81 Cylindrical bar arrangement
82 Outside formwork
85,85A Diaphragm floor liner module (DF liner module)
86 Diaphragm floor reinforcement
87 Built-in support structure
88 Built-in support structure
89a Radiation reinforcement
89b Circumferential reinforcement
90 Drywell inner reinforcement (RCCV inner upper reinforcement)
91 Temporary support
92 Suspended arm
93 Drywell outer reinforcement (RCCV outer upper reinforcement)
95 Peripheral support step
96 Temporary strut (Temporary support means)
97 Shear plate inside
98 Shear plate material
99 Sheer plate outside
100 Temporary support means
101 Reinforcement coupler (reinforcement mounting means)
102 Top slab reinforcement (top slab orthogonal reinforcement)
103 Built-in support structure
104 Top slab module
105 External support structure
108 Mounting bracket
110 Top slab top surface
111 Built-in support structure
112 Temporary support material (Temporary support means)
113 prop
114 Circumferential reinforcement
115 Outermost bar on the circumference side
116 Reinforcement coupler (reinforcement joint means)
118 Reinforcement coupler (reinforcement joint means)
119 Outermost bar on the outer circumference side

Claims (3)

On the ground, on the outside of the cylindrical liner that constitutes the reactor containment vessel made of reinforced concrete, a staircase structure with a height formed from the inside to the outside is installed,
Assemble so that the load of the tubular body reinforcement does not act on the cylindrical part liner by installing multiple rows of tubular body reinforcement on each step of this staircase frame,
A method for constructing a reactor containment vessel, wherein the cylindrical liner and the tubular body reinforcement are independently lifted by a lifting machine and installed at a predetermined position on a construction site of a reactor building. Reinforcement of the joints between the reactor containment bar arrangements such as the mat differential bars fixed at the construction site of the reactor building and the tubular body arrangements of the suspended reactor containment vessel with different lengths for each stage The method for constructing a containment vessel according to claim 1 , wherein the reactor containment vessel is connected by joint means. When the cylindrical liner of the reactor containment vessel and the tubular body reinforcement are suspended at the construction site at the same time and then welded to the existing liner on which the cylindrical liner is installed, the reactor is stored during the welding period of the cylindrical liner. The method for constructing a reactor containment vessel according to claim 1, wherein the tubular body reinforcement is suspended and supported by a temporary support column erected on the lower concrete of the vessel.

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