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LARGE-SCALE APPLICATION OF SEGMENTING AND DECONTAMINATION TECHNIQUES

Objective

AS ONE OF THE FIRST NUCLEAR POWER PLANTS OF GERMANY, GUNDREMMINGEN UNIT A OPERATED FROM 1966 TO 1977 UNTIL AN ACCIDENT OCCURED WITH SUBSEQUENTIAL DAMAGE OF THE PLANT. IN 1980, IT WAS DECIDED TO DECOMMISSION THE PLANT. WHILE FOR THE REACTOR AND AUXILIARY BUILDINGS A CONCEPT OF SAFE ENCLOSURE WAS ISSUED, SOME SELECTED SYSTEMS IN THE TURBINE HOUSE WERE DISMANTLED AND DECONTAMINATED. THE AIM WAS TO REDUCE THE RADIOACTIVE WASTE VOLUME AS MUCH AS POSSIBLE AND TO RECLAIM USABLE MATERIALS.

THIS RESEARCH WORK IS AIMED AT THE DEVELOPMENT AND OPTIMISATION OF DISMANTLING AND DECONTAMINATION TECHNIQUES, AS WELL AS MEASUREMENT METHODS FOR RESIDUAL ACTIVITY, APPROPRIATE FOR A LARGE-SCALE APPLICATION (300 MG). ECONOMICS AND HEALTH-PHYSIC CONSIDERATIONS ARE MAIN CRITERIA IN THIS RESEARCH.

B.1. SELECTION AND LARGE-SCALE APPLICATION OF TECHNIQUES FOR THE CUTTING OF COMPONENTS FROM THE TURBINE HOUSE.
B.1.1. CLASSIFICATION OF COMPONENTS FOR DISMANTLING.
B.1.2. LABORATORY TESTS OF VARIOUS CUTTING TECHNIQUES WITH SUBSEQUENT SELECTION FOR THE MOST APPROPRIATE APPLICATION.
B.1.3. LARGE-SCALE APPLICATION OF SELECTED CUTTING TECHNIQUES ON VARIOUS COMPONENTS.

B.2. SELECTION AND LARGE-SCALE APPLICATION OF TECHNIQUES FOR THE DECONTAMINATION OF COMPONENTS FROM THE TURBINE HOUSE.
B.2.1. CLASSIFICATION OF COMPONENTS FOR DECONTAMINATION.
B.2.2. LABORATORY TESTS OF VARIOUS DECONTAMINATION TECHNIQUES WITH SUBSEQUENT SELECTION FOR THE MOST APPROPRIATE APPLICATION.
B.2.3. LARGE-SCALE APPLICATION OF SELECTED DECONTAMINATION TECHNIQUES ON VARIOUS COMPONENTS.
B.2.4. REASSESSMENT OF EXISTING PROCEDURES TO FACILITATE UNRESTRICTED RELEASE, BASED ON MELTING OF METALLIC SCRAP.

B.3. DETAILED STUDIES ON ELECTROCHEMICAL DECONTAMINATION.
B.3.1. CONTROL AND OPTIMISED USE OF ELECTROLYTES.
B.3.2. DEVELOPMENT OF CONTINUOUS REGENERATION PROCEDURES FOR ELECTROLYTES.
B.3.3. DEVELOPMENT OF CONTINUOUS REGENERATION PROCEDURES FOR ACIDS.
B.3.4. INVESTIGATIONS FOR OPTIMAL CONDITIONING OF SECONDARY WASTE ARISING FROM ELECTROLYTES AND ACIDS.

B.4. OPTIMISATION OF METHODS FOR THE DETERMINATION OF THE RESIDUAL ACTIVITY.
B.4.1. CLASSIFICATION OF COMPONENTS FOR RESIDUAL ACTIVITY MEASUREMENTS.
B.4.2. TESTING OF VARIOUS MEASURING TECHNIQUES WITH SUBSEQUENT SELECTION.
B.4.3. LARGE-SCALE APPLICATION OF SELECTED METHODS FOR RESIDUAL ACTIVITY MEASUREMENTS ON VARIOUS COMPONENTS.

Funding Scheme

CSC - Cost-sharing contracts

Coordinator

Kernkraftwerk RWE - Bayernwerk GmbH
Address
1,Dr.-august-weckesser-strasse
89355 Gundremmingen
Germany