JPS5987392A - Spherical steel container of reactor facility - 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 The present invention is a steel spherical containment vessel for nuclear reactor equipment, the lower part of which is placed on a concrete foundation, and the upper part of which is left upright. , inside the containment vessel, a concrete internal structure having a 1.2-body protective cylinder and a conduit penetrating the containment vessel are arranged, and an anchor element connects the concrete internal structure and the concrete foundation of the reactor equipment. Concerning a steel spherical containment vessel.

In the case of the containment vessel known from JP-A-52-63589, rod-shaped anchoring elements are guided through the entire concrete and are tightened by plates provided on the outside of the concrete on both the inside and outside of the containment vessel. ing.

As a result, a holding force is transmitted by the entire concrete layer on both the inside and outside of the containment vessel, which prevents displacement of the concrete internal structure and the containment vessel and prevents the conduits passing through the containment vessel from breaking, especially in the event of an earthquake. Therefore, the anchor element becomes thick. This means that the desired pre-tightening of 500 Mp at each tightening point is very large relative to the force. Furthermore, the known rod-shaped anchoring elements are spaced from the concrete over most of their length by a flexible packing material, such as a packing material such as foamed polystyrene. This provides a certain flexibility with respect to the movement of the spherical containment vessel during internal pressure loading tests, for example during internal pressure tests in which the spherical containment vessel extends by approximately 20 mm in the area of the missile protection cylinder. Therefore, relative movement between the containment vessel and the adjacent concrete must be deliberately allowed.

SUMMARY OF THE INVENTION It is an object of the invention to provide a method of restraining a spherical containment vessel at a low cost.

According to the invention, this object is achieved by embedding the anchoring element in the concrete over its entire length in the area of the air vehicle protection cylinder, so that the containment vessel is connected between the air vehicle protection cylinder and the concrete foundation. This is achieved in that the anchoring elements are connected to the vertical reinforcing bars of the missile protection barrel in such a way that they are tightened without any play between them.

According to the invention, the spherical containment vessel protrudes from the concrete base.1. At the point where you move to the part where you are standing freely,
Even during internal pressure load inspections, the containment vessel and concrete are restrained so that there is no relative movement at all. This allows the anchoring element to have a very simple desired shape. In other words, this anchor element can be buried in the concrete itself, and more specifically, it can be buried in an interlocking manner over its entire length without a flexible packing material. It is located within a 20° meridian angle extending outward from the wall. The restraint is thereby limited to a very small area at the edge of the concrete foundation, while the lower laid area, ie the area closer to the center of the concrete foundation, can be constructed without special anchoring.

The invention is advantageously implemented in such a way that the anchoring element is screwed together into the missile protection cylinder and into the concrete foundation. This is because in that case a wide area in the vertical direction of the concrete can be covered without compromising the airtightness. For this purpose, the anchoring element is connected via a threaded bushing welded to the containment vessel. In this case, the holding force is easily transferred from the internal structure of the containment vessel to the concrete foundation located below it, and the holding force hardly loads the containment vessel itself. In any case, the invention prevents bending moments from being introduced into the containment vessel due to lateral displacement of the anchoring elements engaging opposite sides of the spherical containment vessel.

In another embodiment of the invention, the anchor element comprises a steel plate that is welded to the containment vessel.

This steel plate, which is connected in a suitable manner to the vertical reinforcing bars of the concrete, strengthens the containment vessel, so that sealing and sealing effects against radioactivity are not a problem with the anchoring elements. The steel plates can then support headed studs arranged in rows to improve the connection with the concrete and its reinforcement. This steel plate is welded to the containment vessel either flat or vertically.

In another embodiment of the invention, it is proposed that the anchoring element emanates from a steel plate that is abutted as part of the containment vessel and the containment vessel itself. In this case, the steel plate has a part projecting from the sphere in order to accommodate the anchoring element. In this case, the steel plate is designed, for example, as a wrought iron piece.

The present invention will be described in detail below based on embodiments shown in the drawings.

The reactor equipment in Figure 1 has a steel ball 1 as a containment vessel, this steel ball 1 has a diameter of 56 m, and is surrounded by a secondary shield 2 made of concrete. is placed on a concrete foundation 3. This foundation 3 is integrally constituted by a foundation 6 of the secondary shield 2, a central region 7, and a ring-shaped wall 16. Between the concrete foundation 3 and the vertical wall 4 of the secondary shielding body 2 there is an intermediate chamber 5 of approximately triangular cross section which can be used to house auxiliary equipment.

Inside the containment vessel 1, there is a reactor pressure vessel 8 connected to the reactor pressure vessel 8 via a conduit 10, as a main component of the pressurized watercolor reactor equipment with a thermal output of 3800 MW. A plurality of steam generators 9 are arranged. The system of conduits 10 includes a main coolant pump (not shown).

The components of the so-called - next system are thick concrete walls 17
It is surrounded and divided. The outer boundary of this enclosure is a so-called missile protection cylinder 11 that protects the containment vessel 1 by trapping debris that could fly off in the event of an accident.

A rotary crane 12 is placed above the flying body protection cylinder 11.6 A chamber 13 between the flying body protection cylinder 11 and the spherical containment vessel 1 surrounding it is used to store other auxiliary equipment. used for. The steam conduit 15 starting from the steam generator 9 is connected to the containment vessel l near the equator of the spherical containment vessel 1.
, and further penetrates the secondary shield 2 and is guided in a straight line.

The containment vessel 1 is composed of a concrete foundation 3, a ring-shaped wall 16, and a concrete spherical body 18 supported by the ring-shaped wall 16. . This spherical body 18 is located opposite an inner concrete spherical body 19, which is connected to all other concrete internal structures 11.1.
It is the basis of 7. The two bulbous bodies 18, 19 are connected to each other via the containment vessel 1 by an anchor rod 20. In FIG. 1, the anchoring element 20 is only visible at the inner edge of the missile protection cylinder 11. The anchoring element 20 extends over the annular region 21 indicated by the dashed line of the containment defined by the angle WK of 20°, i.e. extends outwards to the free end of the outer concrete bulb 18 in FIG. , the inner concrete spherical body 9 is reinforced at the transition of the missile protection cylinder 11 with a vertical bar 22 which acts as an anchoring element 20 . That is, the anchor element 20 is twisted in the containment vessel 1. In line with the upwardly projecting rods 22, downwardly running vertical rods 24 are screwed into the lower threaded holes of the screw bushings 23, these rods 24 being connected to the outer concrete bulb 18, in particular It extends into the wall of concrete foundation 3.

Since the rod 22.24Vr is constructed without sealing material, the concrete creates a tight interlocking connection between it and the internal reinforcing bars 25 and 26 running in the direction of the bulbous bodies 18.19. As a result, the containment vessel 1 is clamped without any play between the projectile protection cylinder 11 and the concrete foundation 3, so that the relative movement between the containment vessel and the concrete, as seen in the known case, is prevented. It disappears. The shearing forces acting against the relative movement are additionally taken up by headed studs 27 arranged on the outside of the rods 22, 24 on both the inside and outside of the containment vessel 1.

In the embodiment shown in FIG. 3, the containment vessel 1 is provided with steel plates 30, 31 erected in the area of the air vehicle protector 11, and these steel plates 30, 31 are erected at right angles to the spherical surface of the containment vessel 1. Welded at one joint on the inside and outside of the The steel plates 30 and 31 are arranged in the meridian plane 1, ie in a large circle running perpendicularly from the upper pole to the lower pole of the spherical containment vessel. Furthermore, these steel plates have an inner ball-less body 19
A vertically running reinforcing body is formed which connects the concrete to the outer spherical body 18 without any play. This connection is made of steel plate 30
．． An improvement is also achieved by a headed stud 34 welded at 7 right angles to 31.

In the embodiment shown in FIG. 3, the headed stud 34 is the third
In the figure, it is indicated by the dotted line 35.36 to 37°382
placed in one row. In that case on the one hand column 35.37
The headed bolts 34 of and, on the other hand, of the rows 36, 38 are arranged in straight lines 39 and 40, respectively, running perpendicularly to the containment vessel 1, so that as uniform a stress in the containment vessel 1 as possible is obtained. .

In the embodiment according to FIG. 4, the containment vessel 1 carries steel plates 42,43 as anchoring elements 20 on both its inner and outer sides, which steel plates 42,43 are designed as welded flat strips. These steel plates 42,43 support welded headed studs 44,45 arranged in rows. Since these headed studs are arranged in the meridian plane, these headed studs 44, 45 do not interfere with the concrete 18 of the foundation 3 and the spherical body 19 in the vertical direction as required by the air vehicle protection cylinder 11. creating a tight connection between

FIG. 5 shows a cross-sectional view of the mooring portion between the headed stud 44 and the concrete reinforcing body in FIG. 4 at right angles to the containment vessel, and FIG. 6 shows a cross-sectional view along the line ■-■ in FIG. It shows. As can be seen from these drawings, headed studs 44 and 45 are reinforced with reinforcing bars 47 and 48 that run perpendicular to each other.
The vertical sections 49 of these reinforcing bars are, for example, in the form of vertically oriented U-shaped legs. The narrow enclosure creates a tight mooring and prevents movement between the abutting concrete parts.

In the embodiment shown in FIG. 7, the containment vessel l has a forged iron piece 50 of the shape shown in FIG. Anchor elements 51, 52 emerge perpendicularly from 57. The upwardly directed element 51 and the vertically downwardly directed element 52 are connected to the flanges 53.54 by welded seams 55 and 56.

These flanges have reinforcing bars 58 and 1-59 running vertically.
are mounted, for example by nuts 60, in such a way that they extend into the concrete foundation (not shown).

In the case of the embodiment shown in FIG. 8, the flying object protection cylinder 11
A vertical reinforcing bar 62 extending into the forged iron piece 64 has a screw hole 63.
and is held there by a nut 65. Reinforcing bars 67 are provided in the foundation 3 in line with the reinforcing bars 62 and protrude vertically downward, and these reinforcing bars 67
is inserted into the screw hole 68.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view of the main parts of a nuclear reactor facility with a pressurized water expansion reactor, and Figures 2, 3, and 4 are the transition areas between the inner concrete sphere and the missile protection cylinder, respectively. Fig. 5 is a schematic diagram of the mooring of the headed stud and concrete reinforcement in Fig. 4, Fig. 6 is a sectional view taken along the line ■-■ in Fig. 5, 7 and 8 are detailed cross-sectional views of an anchoring element emerging from a portion of the containment vessel, respectively. 1... Containment vessel, 3... Concrete foundation, 1
1... Flying body defense, protective cylinder body, 18.19...
Concrete spherical body, 20, 22. 24... Anchor element, 23... Screw bushing, 30.31...
Steel plate, 34...headed stud, 42.43.-
・Steel plate, 44° 45...headed stud, 57・
...Strip material, 58°59.67...Anchor element. (6118) ft Rijinben 31;4. Kiyoshi Wmura Tokukai Show 5
9-87392 (6) Continued from page 1 0 Inventor: Hanspeter Schabert, Federal Republic of Germany, Erlangen-Friedrich Bauerstrasse 28 0 Inventor: Hans Bremer, Federal Republic of Germany, Otzfuenbach, Berliner Strasse 284

Claims (1)

[Scope of Claims] 1) A steel spherical containment vessel for nuclear reactor equipment, the lower part of which is placed on a concrete foundation, and the upper part of which is left standing freely. In a steel spherical containment vessel of nuclear reactor equipment, in which a concrete internal structure having a projectile protection cylinder and a conduit penetrating the containment vessel are arranged, and an anchor element connects the concrete internal structure and the concrete foundation. , anchor element (
20) is embedded in concrete (18, 19) over its entire length within the range of the flying object protection cylinder (11), and the containment vessel (1) is connected to the flying object protection cylinder (11). A steel spherical containment vessel for nuclear reactor equipment, characterized in that it is connected to vertical reinforcing bars of a flying body protection cylinder (11) without any play between the concrete foundation (3) and the concrete foundation (3). . 2) The anchor element (20) is connected to the flying body protection cylinder (
11) Containment vessel according to claim 1, characterized in that the containment vessel is arranged in a steel ball meridian angle (W) of 20° extending outwardly from the internal wall of 11). 3) The anchor element (22, 62) is screwed to the flying body protection cylinder (11), and the anchor element +24.67)
4) The anchor element (22, 24) is welded to the containment vessel (1). 4. Containment vessel according to claim 3, characterized in that the container is connected via a threaded bush (23). 5) Containment vessel according to claim 1 or 2, characterized in that the anchoring element is welded to the containment vessel (1). 6) Storage according to claim 5, characterized in that the steel plates (30, 31, 42, 43) support headed studs (34, 44° 45) arranged in rows. container. 7) a strip (57) to which the anchoring element (20) is welded as part of the containment vessel (11);
3. A containment vessel according to claim 1 or 2, characterized in that the container comes out from. 8) Storage according to claim 7, characterized in that the strip (57) has portions (51 to 54) projecting from the spherical shape for installing the anchor elements (58, 59). container.