JPS6091295A - Storage vessel functioning as transport in combination for radioactive substance - 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 reinforced concrete tank II which is enclosed in a steel tank, is jacketed externally and internally and is closable by a lid made of reinforced concrete.
) Concerning a container for transporting and storing a reservoir of radioactive materials, which is loaded into the inner chamber of the container.

Reinforced concrete containers for transporting radioactive materials are known. Reinforced concrete guarantees the necessary shielding against radiation emitted by radioactive materials. Concrete 1: To protect the material, the reinforced concrete filling is completely surrounded by a jacket. This increases the desired impact resistance of the transport container.

If the transport container is to be used simultaneously as a storage container for intermediate or final storage of radioactive material loaded into the container, a container is needed that can be manufactured at low cost.

The object of the invention is to create a transport and storage container made of reinforced concrete that is inexpensive to manufacture.

The above-mentioned problem is solved in a container of the type mentioned at the outset as follows. That is, the lid projects from the mounting surface formed by the jar, and the lid is placed on the said mounting surface within the projecting part of this outer mold, between the upper edge of this outer mold and the edge of the lid jacket. The solution is that the intermediate chamber is configured to be able to be placed so that it can be opened and closed by welding.

The formwork required for concrete pouring advantageously serves as a jacket for the reinforced concrete filling, and steel plates are used as disposable formwork for this formwork. The outer formwork projects from the filled reinforced concrete, the free upper surface of which serves as a resting surface for a lid that can be inserted into the outer formwork of the container. The manufacturing of the transport container therefore requires only a small outlay. Furthermore, the upper edge of the outer formwork and the lid jacket.

An openable intermediate chamber is formed between the upper edge of the cut and the upper edge of the cut. This is an excellent arrangement for simultaneously using the transport container as a sealable storage container.

Other configurations of the present invention are described in claims 2 to 7.

In this way, a filler made of sheet steel and weldable to the outer formwork and to the lid jacket is used to achieve a good welded closure of the intermediate chamber between the upper edge of the outer formwork and the upper edge of the lid jacket. It is possible to do so. With this configuration, it is possible in some cases to place a closure on the lid that can be welded to the outer formwork. If the transport and storage container has to be opened again, for example after intermediate storage of radioactive material, it is possible to open the closure part L without breaking the lid.

To seal the transport container, a soft gasket made of metal, for example lead, is inserted between the support surface of the container and the lid, which is well adapted to the concrete structure of the support surface. In order to form a smooth sealing surface, the mounting surface has particularly the quality of exposed concrete.

In order to allow the lid to rest on the reinforced concrete surface of the container within the interior space surrounded by the outer jacket, the lifting mechanism within the lid must be secured. A threaded socket is formed that is accessible from the top surface. The lid and bottom of the container are covered with fine reinforcing steel. This makes it possible to use a relatively thin steel plate as the outer jacket, without damaging the internal space containing the radioactive material even when the transport container is subjected to impact loads.

The invention will be explained in more detail below with reference to embodiments illustrated in the accompanying drawings.

The drawing shows a cylindrical transport and storage container.

The interior chamber 1 of this vessel is a hermetically sealed steel vessel 2 (leakage rate, ff 10
There is a chamber for inserting a 1 second bar. The steel tank 2 is made of special steel.1 In this transportation and storage container, reinforced concrete is used for radiation shielding. In this example I) IN1
Quality class B2 with density 2.5 g/cm according to 045
5/3 concrete is used, but higher density reinforced concrete can also be used depending on technical requirements.

The interior chamber 1 is surrounded by a wall 3 made of reinforced concrete 11, the reinforcing bars 3a of which are shown in FIG. The bottom part 3b has thin reinforcing bars built into it. The outer and inner formwork 4.5 necessary for casting the concrete 11) when building the transport and storage container is used as an outer jacket of the transport and storage container and as a jacket for the lining of the inner chamber 2. It is used. A steel plate is used for the formwork 4.5. The thickness of the steel plate can be determined in various ways. In a different embodiment, if the steel plate of the inner formwork 5 is made thicker than that of the outer formwork, the safety is the same and the weight is reduced. The formwork is part of the transport and storage container.
Helps protect against impact loads. Furthermore, these forms also offer good detoxification possibilities of the container surfaces. The outer formwork 4 of the transport container projects from a support surface 6 formed by filling the container with concrete in a lid 7 that closes the inner chamber 1 . The lid 7 is likewise made of reinforced concrete, the quality of which corresponds to that of the reinforced concrete of the wall 3, and is covered by a jacket 8, for which, as in the case of the container, the formwork necessary for pouring the reinforced concrete is available. ing. Steel plates are used for this formwork.

In the part of the outer formwork 4 of the transport and storage container which protrudes from the support surface 6, a lid 7 is provided which connects the north edge 9 of this outer formwork 4 and the upper edge 10 of the lid jacket - in this embodiment the outer formwork 4. can be inserted in such a way that an intermediate chamber 11 is formed between the L edge 9 of and the - which are flush with each other, and which can be closed airtight by welding.

In this exemplary embodiment, in the case of the filling example, a steel ring is further inserted into the intermediate chamber as the filling part 11a, which is welded to the outer formwork 4 of the lid 7 and the jacket 8. Welding serves to provide a gas-tight closure of the transport and storage container when loading radioactive material into intermediate or final storage. For further closure, the lid 7 can further be closed with a lid plate 7a which is welded to the outer mold 4. This lid plate 7a is necessary in order to be able to separate the lid 7 without damaging it, for example when the transport container is reopened after being transported to an intermediate storage.

It is necessary to store this transport/storage container for a long period of time.
1 is closed with a lead fence and sealed with a sealing material. However, steel ball strips cast with araldite may also be included. The closure described above can be removed again from the container and lid without destroying the circumferential jacket.

After the lid 7 is placed on the mounting surface 6 in the transportation/storage container,
It is secured by a suitable screw 13 which can be screwed into a screw socket 4 in the wall 3.

A soft packing 15 made of lead is inserted between the mounting surface 6 of the wall 3 and the mounting surface 12 of the lid 7, and this soft packing is applied to the concrete structure of the mounting surface under the pressing force of the screws 13. It can be adapted to

The support surface 6.12 has the quality of poured concrete and thus forms a relatively smooth concrete surface. Conc 11 as a mounting surface for soft packing 1. A steel plate covering can also be used. In addition to or instead of the screw 13, the lid 7 has a laterally guided bolt 13a.
held by.

For fixing the bolts shown in Figure 1, see also the cover 7)
13a can be screwed in. These screws and also screw 13 can be sealed.

Safety requirements during the transport and storage of radioactive materials can then be taken into account.

In order to be able to insert the lid 7 into the outer formwork 4 without difficulty, a screw socket 16 is formed in the lid 7 for fixing a lifting mechanism which can be accessed from above the lid. In this embodiment, the lifting mechanism is
A star-shaped carrier 17 is provided, which can be screwed onto the lid 7 and is provided with a latching hole 18 for a crane, allowing reliable opening and closing of the lid 7 even when the height of the space is low.

When this star-shaped gear 1j gear 17 is installed, a wire rope is often required between the crane latching hole 18 and the crane hook. The crane hook is inserted directly into the crane latching hole 18.

After placing the transport and storage container, the star carrier 17 is removed from the lid 7 again.

In this embodiment, the lid 7 is aged flat on its lower side, which has a seating surface 12. However, as an alternative to this, it is possible to provide a centering element on the underside, which rests on the inner formwork 5 and projects slightly into the interior space 1.

For transporting and moving the transport and storage container, four claws 19 are provided on the outer formwork and a lifting lug 20 is provided in the center of gravity axis. When the container is lifted by the lid 20, the container can be rotated about its axis.

This transportation/storage container has an extremely advantageous structure in terms of cost.
Moreover, it meets the high requirements for the safety of transport and storage containers for radioactive materials.

[Brief explanation of the drawing]

Figure 1 is a side view of a small part of the transport/storage container taken along section line ■-■ in Figure 2; Figure 3 is a plan view of the lid of the transport/storage container equipped with a threaded d) top-lifting mechanism. The numbers in the figure are 4.5...Formwork 6...Placement surface 7...Lid 9...Top edge 10...Top edge of lid jacket] 1...Middle room agent Hikaru Esaki Preferred Agent Hikaru Esaki - II Continued from page 1 Inventor Ernst Hennin Deigl 0 Inventor Reinhard Enge, Federal Republic of Germany, Hükelhoven, Reisszigestler Se, 16 Federal Republic of the United States, Hurt, Auf der Kenuei] -ch continuation-supplement re-12, -,i, Mr. Manabu Shiga, Commissioner of the Patent Office, 1, Indication of the Case, Showa Q. Patent Application No. 1g, L, S, etc. No. 1 3 Person making the amendment 1'1. Relationship with applicant 48 agent 5, deadline for amendment order (voluntary) Showa year month month 6 month subject of amendment

Claims (1)

[Scope of Claims] 1. Enclosed in a steel tank, surrounded externally and internally with a jacket, and capable of being closed with a lid made of reinforced concrete, inside the inner chamber of the container made of reinforced concrete. In a transport and storage container for a container of radioactive material to be loaded, the jacket consists of a disposable formwork (4, 5) made of steel plate, and the outer formwork (4) is formed of reinforced concrete filled with the container. projecting from the surface (6) and having a lid (7) on the said mounting surface (6) within the projecting part of this outer formwork (4);
It is characterized by being configured so that it can be placed so that an openable and closable intermediate chamber (11) is formed by welding between the upper edge (9) of this outer formwork and the lid jacket edge (10). A transportation and storage container. 2. Insert the outer formwork and lid jacket (8) in the intermediate chamber (1).
2. Transport and storage container according to claim 1, characterized in that a filling (11a) consisting of a weldable steel sheet can be inserted therein. 3. The lid plate (7a) is configured such that a lid plate (7a) weldable to the upper edge (9) of the outer formwork (4) can be placed on the lid (7). Transport and storage containers as described in Section. 4. Placement surface of reinforced concrete placed inside the container (
6) and the placement surface (12) of the lid (7), a metal soft packing (15) is inserted, any one of the dimensions of claims 1 to 3 of the scope of claims. A transportation and storage container as described in one. 5. Transport and storage container according to any one of the dimensions of claims 1 to 4, in which the mounting surface (6, 12) has an exposed concrete quality. 6. A screw bush (16) accessible from above of the reservoir lid (7) for fixing the lifting mechanism (17) is attached to this lid (7).
A transport and storage container according to any one of the dimensions of claims 1 to 5, which is located within the container. 7. Claim 1, wherein the concrete in the lid (7) and the bottom (36) of the container is reinforced with fine-mesh steel reinforcement.
A transport and storage container according to any one of paragraphs 6 to 6.