JPS60239698A - Construction method of reactor containment vessel - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for constructing a nuclear reactor containment vessel such as a tank-type fast breeder reactor.

[Prior Art] Conventionally, a tank-shaped reactor containment vessel a as shown in FIG.
When constructing a light tb, the inner liner l) is made of a steel plate or the like, and then concrete C is poured around the outer periphery of the light tb.

However, the reactor containment vessel a has an unstable structure with a small bottom and a large top, and is also heavy, so it is susceptible to strong winds, earthquakes, etc. during the fabrication of liner b or concrete pouring. There is a risk of it collapsing easily.

In the past, the construction process was complicated, as it was necessary to provide a foundation structure to prevent the reactor containment vessel from collapsing.

[Problem to be Solved by the Invention 1] In view of the above-mentioned conventional situation, the present invention attempts to make it possible to easily construct an unstable nuclear reactor containment vessel with a constriction at the bottom without fear of collapse. be.

Means for Solving Problem U] The present invention assembles a cylindrical container-shaped lower liner on a foundation floor, casts a concrete wall around the outer periphery of the lower liner, and fixes a horizontal liner to the upper end of the lower liner. supporting the horizontal live on an intermediate floor of a reactor building, providing an annular upper liner foundation on the outer periphery of the horizontal liner on the intermediate floor, and assembling a cylindrical dome-shaped upper liner on the upper liner foundation; By placing a concrete wall around the outer periphery of the lower liner, the unstable reactor containment vessel with its lower constriction can be constructed safely and reliably. This law concerns the construction method for nuclear reactor containment vessels.

[Example] Embodiments of the present invention will be described below with reference to the drawings.

Figure 2 shows 1 of the present invention! This figure shows a reactor containment vessel 1 constructed by the step method, in which a lower liner foundation 3 is provided in an annular manner on a concrete 1-foundation floor 2, and a cylindrical container-shaped lower liner 4 is installed on the lower liner foundation 30 using steel plates or the like. After assembly, a lower concrete wall 5 is cast around the outer periphery of the lower liner 4.

A horizontal liner 6 is fixed to the upper end of the F-stage riser 4, and a two-inch trench 1 is installed on the bottom side of the horizontal liner 6 at approximately the same height as the horizontal liner 0, which also serves as the floor of the reactor building 11.・Tr on floor 7? ! , and the horizontal liner 6 of the concrete floor γ
An upper liner foundation 8 is provided near the outer periphery, which is made of a circular concrete comb and reinforcing reinforcing bars are buried inside, and a cylindrical dome-shaped lower liner 9 is assembled on the upper liner foundation 8. The lower end is fixed to the outer periphery of the horizontal liner 6, and then an upper concrete wall 10 is cast around the outer periphery of the upper liner 9, and the floors 12 of each floor of the reactor building 11 are connected to the upper concrete floor wall 10. and reinforce it.

4. It goes without saying that the method for constructing a reactor containment vessel of the present invention is not limited to the above-described embodiments, and that various changes can be made without departing from the gist of the present invention.

[Effects of the Invention] As described above, the method for constructing a reactor containment vessel of the present invention provides various excellent effects as described below.

(I) In parallel with the construction of the reactor building, the lower liner foundation,
The lower liner, the lower concrete wall, the upper live foundation, the 1st live stage, and the 1st lower knee concrete wall are constructed in this order, so the reactor containment vessel does not become unstable at 4T.
It can be constructed safely and securely without collapsing due to wind or earthquakes.

(II) Concrete the first stage liner foundation locally in a circular manner.
Since the thickness of 1- is increased, it can withstand sufficient strength.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of an example of a tank-type one-quantum reactor containment vessel, and FIG. 2 is an explanatory diagram C showing an example of a reactor containment vessel constructed by the vaulting method of the present invention. 1 is the reactor containment vessel, 2 is the concrete foundation floor, 3 is the lower liner foundation, 4 is the lower liner, 5 is the lower concrete wall, 6 is the horizontal liner, 1 is the concrete floor, 8 is the lower liner foundation, 9 is the upper liner , 10 indicates the upper concrete wall. Figure 1 Figure 2

Claims (1)

[Claims] 1) Assemble the cylindrical container-shaped lower liner on the foundation floor,
A concrete wall is cast around the outer periphery of the lower liner, a horizontal liner is fixed to the upper end of the lower liner, and the horizontal liner is supported on the intermediate floor of the reactor building. An upper stage liner foundation is provided in an annular shape on the outer periphery of the liner, a cylindrical dome-shaped -1 stage liner is assembled on the upper stage liner foundation, and a concrete wall is poured around the outer periphery of the upper stage liner. A method of constructing a reactor containment vessel.