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INVESTIGATIONS INTO THE MELTING OF RADIOACTIVE METAL WASTE IN A CONTROLLED AREA

Objective

THE MELTING OF RADIOACTIVE METAL WASTE HAS SEVERAL ADVANTAGES IN COMPARISON WITH OTHER PROCEDURES, I.E. : REDUCTION OF THE WASTE VOLUME TO BE DISPOSED OF, SAFE ENCLOSURE OF THE RADIONUCLIDE IN THE METAL MATRIX SAFE AND EXACT DETERMINATION OF THE RADIOACTIVE INVENTORY AND, UNDER CERTAIN CONDITIONS, HARMLESS REUSE OF THE METAL.

THE AIM OF THE INVESTIGATIONS IS THE TESTING OF THE MELTING PROCEDURE ON VARIOUS TYPES OF WASTE METAL, WITH SURFACE CONSTAMINATION UP TO 500 BQ/CM2 AND SPECIFIC ACTIVITY UP TO 200 BQ/G, UNDER PERMANENT OPERATION CONDITIONS AND IN A CONTROLLED AREA.
The melting of 200 t of various highly contaminated steel wastes (200 Bq/g and 500 Bq/cm{2}) was not completed because the melting plant was prematurely decommissioned by the Kernforschungszentrum Karlsruhe, for economic reasons.

In the work completed, however, it was found that cobalt-60 and other iron like nuclides remained, as expected, almost completely in the ingot, whereas caesium-137 and europium-152 were concentrated in the slag. In spite of the short operation time, it was shown that long term operation of the melting plant would be possible without significant radiation exposure to the workforce.
B.1. INVESTIGATIONS ON THE DISTRIBUTION OF RADIONUCLIDES IN MELT, SLAG, FURNACE LINER AND FILTER DUST.

B.2. INVESTIGATIONS ON SECONDARY WASTE, IN FUNCTION OF THE PROCESSED MATERIAL, AND ON BEHAVIOUR OF THE FILTER SYSTEM.

B.3. INVESTIGATIONS ON COMMITTED DOSES AND ACTIVITY RELEASE AS CONSEQUENCES OF THE MELTING WORK.

B.4. OVERALL EVALUATION OF THE MELTING TECHNIQUE AND COMPARISON WITH ALTERNATIVE TECHNIQUES (DECONTAMINATION, COMPACTION, DIRECT DISPOSAL.).

Funding Scheme

CSC - Cost-sharing contracts

Coordinator

Noell GmbH
Address
Alfred-nobel-straße 20
97080 Würzburg
Germany