JPS582784A - Reactor container - 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 relates to a vent pipe support structure for a reactor containment vessel.

Conventionally, the reactor containment vessel for a boiling water reactor has been shaped like a square, for example, as shown in Figures 1 and 2. The interior thereof is divided into upper and lower sections by an I-earphragm floor 2, and the upper part is formed into a dry fell line 7 and a groove 4. A bell metal 5 is erected in the center of the containment vessel body 1, and a reactor pressure vessel is installed on the pedestal 1. t, 1... is a vent pipe, the upper end of which passes through the diaphragm floor 2 above and communicates with the inside of the dry well S, and the lower end of the trench 9 is connected to the sol in the above-mentioned Russi vent damper 4. Immersed in water. In addition, 1
... is a column cert. If steam leaks into the dry well 1 (due to the force of pipe rupture), this steam will flow through the vent pipe R-7, gush out into the pool water in Naples Channel 4, and condense. , and is configured to limit the pressure increase within the containment vessel body 1. By the way, steam is coming from the lower end of the vent pipe r...! −
When vent pipes are discharged into the water and condensed, unstable condensation may cause the pent pipes 1 to vibrate, which may damage the integrity of these vent pipes 1 to prevent this. The lower ends of the vent pipes 1 are connected to each other by a plurality of conventional place members 9, and the lower ends of these vent pipes r...O are fixed to the pedestal 1. 1. Prevent the vibration of... However, in such a case, these group of vent pipes 7...
All of the vibration load is received by the pedestal JK, and there is a problem where an excessive load is applied to the t-sea 1 part #t... that connects the pedestal 5 and the vent pipe 1... 9. Since the load acting on the outermost vent pipe 1 is transmitted to the pedestal ξ through a complex truss structure, the support of this outermost vent pipe 1 is insufficiently rigid. There were some inconveniences such as.

The present invention has been made based on the above circumstances, and its object is to obtain a reactor containment vessel that can securely support the lower end of a vent pipe.

Hereinafter, the present invention will be explained according to an embodiment shown in FIGS. 3 and 4. In FIG. 0, 101 is a containment vessel main body,
This containment vessel main body 101 is composed of a concrete wall 1011 and a nine liner 101b placed inside the concrete wall 1011. The concrete wall 101a is reinforced with a large number of reinforcing bars, is strongly constructed, and has pressure resistance and radiation shielding ability. Further, the liner 101b is made of a relatively thin steel plate and provides p1 airtightness and liquidtightness, and is configured to closely adhere to the inner surface of the concrete wall 101a and not be deformed by internal pressure. In front, inside this liner 101b, there is a reinforcing member (made of steel, etc.).
(not shown) is provided to reinforce this liner 101b. In addition, the inside of this containment vessel body 101 is divided into upper and lower parts by a diaphragm floor 102, and the upper part is formed into a 9" JK structure, and the lower part is formed into a ledge 4. Pool water is stored in Enchan A4.

Yiku, in the center of the containment vessel main body 1#1 (Destal 1
08 is erected, and a reactor pressure vessel leg is placed on top of this pedestal 108. A plurality of vent pipes 101 . And these vent pipes 10F... upper end diaphragm pipe p1
02 and communicates with the inside of the dry well 1-1, and the lower end is immersed in the water well. The lower end portions of these vents and pipes 10r...O are supported in the horizontal direction by a large number of place members 108... These place members 10#... are shaped like a truss as shown in Figure 4! In one layer, (connect Destal 101 and vent pipe 10F-... located at the innermost circumference, and connect nine pent pipes 10
1... Connect each other and further connect the outermost vent pipe ior
... and the containment vessel main body 101 are connected. In addition,
This outermost vent pipe 101... and the containment vessel main body 10
The place members ``sea'' connecting the parts 1 and 1 are provided on the inner surface of the liner 101b of the containment vessel main body 101 and are attached to reinforcing members or the like.

According to one embodiment of the present invention, which has the above-described structure, when a pipe rupture occurs in the reactor containment vessel, the leaked steam is transferred from the vent pipe 1ar-. It is ejected and condensed into the chamber, suppressing the rise in pressure inside it.

Since the lower ends of these O vent pipes J#r-...O are supported in the horizontal direction by place members 1aa..., unstable condensation of the spouted steam occurs and these vent pipes 10F... The lower end portions of the bait tubes 101 do not vibrate, and the integrity of these bait tubes 101 is maintained.

The lower end portions of these pent pipes 1-1...O are supported by both the pedestal 101 and the containment vessel main body 10J via the place members Jea-..., so their support is reliable, and the pent pipes 1-1... Check the health of the tube xor...11
It is self-sufficient to have KJIIi. Mae, ko (D 4'
O is the vibration load of the vent pipe 101...
-IK, but since the containment vessel main body 717 is made of concrete and has been made very strong, the integrity of the containment vessel main body 1011f) will not be impaired.

Note that the present invention is not limited to the above embodiment.

For example, the truss structure of the place member is not necessarily limited to the above.

However, it is not necessarily limited to open-arm type reactor containment vessels, but can also be applied to other lug-type reactor containment vessels.

As described above, the present invention includes a Conc. The upper end connects the 7ct diaphragm to the inside of the reiwell, and the lower end is immersed in the water of the Salsshi Inch A4 FI+, and connects the 9 O pent tubes between the lower ends of these vent pipes. and a place member that supports the lower end of the vent pipe in the horizontal direction, and a frame is formed between the outer circumferential box of the destal, between the lower ends of these vent pipes, and on the inner peripheral surface of the main body of the containment vessel, and supports the lower end of the vent pipe in the horizontal direction. Therefore, the 1destal and the containment vessel main body O are connected via the lower end place member of these vent pipes.
Since it is supported by both sides, its support is reliable, and its effects are great, such as preventing vibration of the vent pipe and reliably maintaining its integrity.

[Brief explanation of drawings]

FIGS. 1 and 2 show a conventional example, in which 1111 is a longitudinal cross-sectional view, and FIG. 2 is a cross-sectional view along the striped line 1go-i. 31igI and FIG. 4 show an embodiment of the invention,
3g is a longitudinal sectional view, and FIG. 4 is a sectional view taken along the line WW in FIG. 3. 101...Containment vessel main body, J#J-...〆Ear flap
,. Muflora, 101--Dreifel, 104--Nadelessi Mother, 101i--Pedexl. 1
07. ,・Bent pipe, 5on-: Y saw 1 member. Applicant's agent Liao Suzu Jiang, Bencher Figure 1 Commissioner of the Patent Office Haruki Shimada 1. Indication of the case Patent application No. 1983-101612 No. 2, Name of the invention Reactor containment vessel 3, Person making the amendment Relationship to the case Patent applicant (307) Tokyo Shibaura Electric Co., Ltd. 4 Agent

Claims (1)

[Claims] Containment vessel body made of concrete, 9 pedestals installed at the center 11 inside the ζO containment vessel body, and Jin's pedestal o
sys surface and the inner circumferential surface of the containment vessel main body, the upper end passes through the ram floor of the final ear 7 and communicates with the inside of the dry fell, and the lower end is immersed in pool water in the Naples Enchanter Δ. A rack is passed between the vent pipes and the lower ends of these vent pipes, between the lower ends of these vent pipes and the outer circumferential surface of the pedestal, and between the lower ends of the filler vent pipes and the inner circumferential surface of the containment vessel main body. A nuclear reactor containment vessel characterized by comprising a T-sea 1 member that horizontally supports the lower end of the tube.