SU1290427A1 - Method of fixing pressed lumps of solid radioactive waste by means of clamps - Google Patents

Abstract

The invention serves to fix solid radioactive waste pressed into clumps and can be used in the processing of low-level and high-level nuclear cycle waste. The purpose of the invention is to increase the cost-effectiveness of the method of fixing the waste by reducing the cost of providing additional strength to the compressed waste with the help of packing devices and reducing the radiation dose of personnel by reducing the time of waste treatment. This is achieved by using metal strips, which are placed in the mold before it is filled with waste, and after filling, they are folded back before or during the process of lowering the pressing punch at the level of an uncompacted lump and / or until the end of the lifting of the pressing punch is deformed completely or partially. In this case, the strips, preferably curved in an I-shape, are inserted before or in addition after the filling of the mold. When implementing the method, the need for additional packaging of briquettes is no longer necessary, and as a result of the insignificant time of contact of personnel with radioactive waste, their radiation dose is reduced. 1 hp f-ly. Zil. W th; about about 1 h

Description

The invention relates to the consolidation of solid radioactive waste pressed into clumps, which are formed mainly during the operation of nuclear power plants.

A device for pressing and scraping the waste is known (UK Patent No. 2032342, Cl, B 30 B 9/30, published in 1979). In this device, the yards are inserted before or additionally after filling the mold. To control the deformation process, the bands have preferred bending directions and / or bending areas. Solid radioactive waste is collected in suitable containers for reuse at the place of origin only in coarse graded

The method comprising press-O is compressed; O is pressed after this without further

waste briquettes

tapes.

This method is implemented using complex devices and requires several stages. it

J5

intermediate processing.

In this case, a small amount of material is required in order to obtain the fastening of lumps without significant loosening, and it is possible to refuse to discard barrels or other valuable containers that are usually necessary for packaging.

P increases costs, increases the likelihood of violations of technology and contamination of equipment with radioactive waste.

In this case, a small amount of material is required in order to obtain the fastening of lumps without significant loosening, and it is possible to refuse to discard barrels or other valuable containers, usually needed for packaging.

When implementing the method disappears

The closest technical solution is the need for additional packaging to the proposed method is the method of pressure testing and fixing of waste (US Patent No. 351073, CL 100/215, published 1971). This method involves pressing the briquettes of waste tied with ribbons and shortening these ribbons during subsequent crimping by pressing the ribbons in with the briquettes using wedge-shaped mandrels. The disadvantage of this method is that a preliminary technological step is already required to press the unsorted radioactive waste. briquettes. This increases the cost of implementing the method and leads to additional contamination of equipment with radioactive waste and overexposure of personnel.

The aim of the invention is to improve the efficiency of the process by reducing the consumption of additional support for the strength of compressed waste with the help of packing devices and reducing the radiation dose of personnel by reducing the time of waste treatment.

The essence of the invention is

The fact that, before filling the mold die 50, the rotary die 4 is retained

the effect of compacting briquettes 5 with a slight reverse elastic deformati1 x.

we put metal strips into it, which, after filling, are folded before or during the process of lowering the pressing punch at the level of an unconsolidated lump and / or until the end of the lifting of the pressing punch is completely or partially irreversibly firmly deformed. When this strip is preferably bent

Claims (2)

 Formula invented one . The method of fixing the brackets of pressed lumps of solid radio active waste, including filing and invest before or additionally after filling the mold. To control the deformation process, the bands have preferred bending directions and / or bending areas. Solid radioactive waste is collected in suitable containers for reuse at the place of origin only in coarse graded intermediate processing. In this case, a small amount of material is required in order to obtain the fastening of lumps without significant loosening, and it is possible to refuse to discard barrels or other valuable containers, usually needed for packaging. When implementing the method disappears need for additional pack5 0 five 0 five briquettes, and as a result of the insignificant contact time of personnel with radioactive waste, their exposure dose is reduced. ila fig o 1 shows a filled. press-form. with a lowered pressing die, a section; in fig. 2 - pressed lump with the image of a strongly deformed metal strip, cut; Fig. 3 shows a pressed lump, for fastening of which two and-shaped bent metal strips are nested before and after filling into the mold, top view. The method is implemented as follows. In the mold 1, U-shaped bent metal strips 2 are inserted before it is filled with radioactive waste 3. Pressing stamp 4 in its lower part is designed so that during the pressing process it bends the slightly bent ends of metal strips 2 to the level of waste 3. B further pressing occurs simultaneously with the compaction of waste 3 to the shape of the briquette 5 and the strong deformation of the metal strips 2. With the reverse movement of the press. one . The method of fixing staples pressed lumps of solid radioactive waste, including zapolg casting the mold with waste, pressing the waste with a stamp into the mold and fastening them with metal strips, characterized in that before filling the mold with waste it includes metal strips; after filling the mold with waste, the strips are bent at the level of unconsolidated lumps, impose on the surface of a single round of the mold. compacted lumps of additional metal strips and press them. 2. Method POP.1, characterized in that before filling the mold, U-shaped curved metal strips adjacent to the inner end are inserted into it Editor K. Voloshchuk Compiled by S. Mikheenko Tekhred L. Oleynik Proof-reader V. But ha Order 7911/52 Circulation 416. Subscription VNII1SH USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., d. 4/5 Production and printing company, Uzhgorod, st. Project, 4 3