DE3933929A1 - METHOD AND DEVICE FOR THE FINAL STORAGE OF HIGHLY ACTIVATED ROD-SHAPED REACTOR INSTALLATION COMPONENTS - Google Patents

Abstract

Method and apparatus for removal and storage of highly radioactive rod-shaped reactor inserts of considerable length and small diameter are described. The inserts (1) are wound spirally onto a spool (3) between discs (4) during extraction and then moved axially into storage container (9). The process is repeated step-wise a number of times until the spool (3) is full and fully positioned inside the storage container (9). <IMAGE>

Description

Field of application of the invention

The invention relates to a method and a device for the disposal of highly activated rod-shaped components long length with small diameter used in nuclear power plants ken can be used for reactor instrumentation.

Characteristic of the known prior art

For the disposal of radioactive rod-shaped reactor installation parts of great length (= 10 m) with small diameter (approx. 10 mm) and different activity distribution are ver different methods and devices for treatment be knows.

The proposed disposal solutions for the reactors Components include:

• - The crushing by mechanical separation at the Ent from the reactor and the bulk material collection in the jet protective container with (DE-OS 33 01 814) or without activity dependent waste sorting,
• - the uncrushed removal from the reactor, the removal of the low-activated / contaminated part length, collection of the highly-activated part length in bundle form in the radiation protection container (DD-WP 3 17 712) and subsequent comminution,
• - The winding on the bobbin of a remote-controlled winding machine with transportable shielding container (DE-OS 30 18 857).

An advantageous use is from the operating conditions in the core power plant in coordination with the disposal system and the law dependent requirements.

In every application, the final act for the final storage fourth waste in sealed containers additional Process steps and devices for manipulation and con  assembly in the manufacture of the transport and end position appropriate condition required.

The volu is for the helically wound coils Use of the menu in the storage container is unfavorable and leads to additional consumption Storage turns.

Aim of the invention

The aim of the invention is high for disposal activated rod-shaped reactor internals a technologically consistent process and device to create a low-turnover, environmentally and radiation-safe disposal of Nuclear power plant up to storage / final storage with a high compact to ensure the level of waste management.

State the nature of the invention

The object of the invention is for highly activated rod-shaped reactor internals of great length with little Diameter and different activity distribution Method and device for producing a trans port and repository-appropriate condition to create a low-turnover, continuous waste chain with minimal Equipment expenditure as well as a maximum of space utilization realize high disposal effectiveness and safety can.

According to the invention the object is achieved in that the be drive-related reactor internals with the low activated / contaminated part length positively on the The winding core is coupled and by spiral winding radially in a plane between the lateral boundary layer be pulled out of the reactor block in their total length. Several fixed windings are axially on the winding core planes by means of limiting disks at a minimum clearance knife of the reactor internals arranged side by side, the one after the other the spiral winding of the form-fitting coupled reactor components allowed.  

Due to the compact arrangement and the procedural Degree of compaction of the spirals becomes high volume usage in storage container reached.

The "lost" winding core becomes rotatable and at a distance of the defined winding planes axially displaceable in the winding channel of a connectable radiation protection device (wrap module) and arranged by a drive system via an ela static coupling element driven from the outside. The side Boundary disks and the spiral ends are on the circumference of Winding channel limited by the inner diameter of the axis identically arranged and open on one side storage container is correct. This ensures that the winding core after each wrapping step by step the width of one The entire length of the winding plane without subsequent changes loading operations and manipulations directly into the storage container can be pushed.

The storage container is preferably used in a radiation protection container with rotary slide valve or rotary insert on all sides in a radiation-safe manner and can be assembled without reloading in this arrangement with a decoupled winding module according to known methods and transported underground to the intermediate storage location or type B (U) version to the final storage location .

Sorting the waste according to radiation protection groups is in principle possible if the feed channel of the reactor installation partly continue to be closed by the shield as in the area of the outlet opening an activity measurement and Separator is arranged.

By arranging a separator in the area of Feed channel of the reactor installation part in front of the winding core can in the event of malfunctions, separate the equipment from the reactor installation part will.

The advantages of this invention are that Spiral winding and multiple arrangement on one Against the winding core due to the achievable degree of compaction better use of space of the La container and thus the intermediate / final storage is reached.  

By combining the winding device and the known Radiation protection containers with rotatable radiation protection closures Additional radiation protection measures and umla are not necessary deoperations between the process steps for collecting, Assembling and transporting. As a result, the environmental and radiation safety significantly increased, the equipment reduced wall and the adaptation or standardization existing disposal systems more effectively.

The all-round radiation-proof inclusion of the highly activated Waste minimizes the downtime in case of procedural accidents world risk and the effort to eliminate them.

Embodiment

The invention is based on an exemplary embodiment are explained. In the accompanying drawings

Fig. 1 section through the winding device.

In Fig. 1 an embodiment of the device for performing the method for the disposal of long rod-shaped reactor internals by winding and collecting in a storage container in the working position is shown in section. The reactor installation part 1 is guided through the feed channel 2 and positively coupled to the winding core 3 between two limiting disks 4 . The winding core 3 is arranged in the winding channel 5 and connected via a flexible coupling 6 to the drive 7 so as to be rotatable and axially displaceable. The reactor installation part 1 is wound between two limiting disks 4 in one plane to form a spiral 8 and the winding core 3 is pushed axially into the fixed, axially arranged storage container 9 . This is held by the pressing device 10 and gradually takes up the winding core 3, which is occupied by a plurality of spirals 8 , as a disposable part. The drive 7 is separated from the winding core 3 , retracted into the winding device 11 and the filled Lagerbe container 9 in the loading channel of the radiation protection container 12 enclosed by the rotatable shielding ring 13 radiation-proof. At closing, the winding device 11 is removed and the storage container 9 is assembled with a special module in the same arrangement.

With a separating device 14 in fault or required, the reactor 1 in the feed channel installation part 2 can be mechanically separated and the device removed.

List of the reference numerals used

1 reactor installation part
2 feed channel for reactor installation part
3 winding core
4 washer
5 winding channel
6 clutch
7 Drive for winding core
8 spiral wound reactor installation part
   (Spiral)
9 storage containers
10 pressing device
11 winding device
12 radiation protection containers with shielding ring
13 shielding ring
14 separating device

Claims (3)

1. A method for producing a transportable and final storage-appropriate state of rod-shaped components of great length with a small diameter, in particular highly activated reac tor components, by winding on a winding core and manufacturing in a portable shielding container with a rotatable radiation protection closure, characterized in that the form-fitting to the Winding core ( 3 ) coupled rod-shaped component ( 1 ) between two limiting disks ( 4 ) in a winding channel ( 5 ) is wound radially in one plane in a spiral and then moved axially in a bearing container ( 9 ) of corresponding inner diameter, and which on the winding core ( 3 ) between the limiting disks ben ( 4 ) coiled spirals ( 8 ) coiled in the storage container ( 9 ) are collected, assembled and transported. 2. Device for performing the method according to claim 1 consisting of a radiation protection container ( 12 ) in which a storage container ( 9 ) is arranged and closed by a winding device ( 11 ), characterized in that the inner diameter of the storage container ( 9 ) the diameter of the winding channel ( 5 ) corresponds, arranged axially and the winding core ( 3 ), on which several limit plates ( 4 ) are arranged axially at a distance from the diameter of the rod-shaped components ( 1 ) that the winding core ( 3 ) for winding and stepwise axial movement in the storage container ( 9 ) is coupled to the drive ( 7 ). 3. Apparatus according to claim 2, characterized in that a separating device ( 14 ) for the rod-shaped component ( 1 ) is arranged in the feed channel ( 2 ).