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INVESTIGATION OF FULL SCALE HIGH LEVEL WASTE CONTAINMENT GLASS BLOCKS

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THIS INVESTIGATION IS PART OF A RESEARCH PROGRAMME ON HIGH LEVEL LIQUID WASTE CONTAINMENT GLASS INVOLVING INDUSTRIAL SCALE WORK APPLIED TO THE SAFETY ANALYSIS OF ULTIMATE GLASS STORAGE, AND THUS THE DEFINITION OF THE GLASS SOURCE TERM.

THE PURPOSE OF THIS WORK IS TO QUANTIFY THE DEGREE OF FRACTURATION INDUSTRIAL GLASS BLOCKS BASED ON NON-RADIOACTIVE SPECIMENS PRODUCED IN A PROTOTYPE UNIT UNDER EXPERIMENTAL CONDITIONS FULLY REPRESENTATIVE OF THE ACTUAL COGEMA VITRIFICATION FACILITIES AT LA HAGUE.

THE PROJECT INCLUDES A THEORETICAL INVESTIGATION OF FRACTURE-INDUCING STRESS DISTRIBUTION IN THE GLASS BLOCK, AS WELL AS AN EXPERIMENTAL STUDY BASED ON WATER LEACH TESTS AT 100 CELSIUS DEGREES TO EVALUATE THE FRACTURED LEACHABLE SURFACE AREA AND ON TOMOGRAPHIC EXAMINATIONS PERFORMED AT THE BAM IN BERLIN ON FULL SCALE CANISTERS CONTAINING GLASS CAST AT MARCOULE.
A 2 year study of the degree of fracturation in full scale high level waste glass blocks was undertaken. The project included a theoretical investigation of thermal and mechanical stresses arising in the glass and determination of the fracture inducing stress distribution in the block. An experimental study was also carried out based on tomographic examinations on full scale canisters containing glass cast at Marcoule, and on water leach tests at 100 C to evaluate the fractured leachable surface area.

A 2-year study of the degree of fracturation in full scale high level waste glass blocks was undertaken. The work included a theoretical investigation of thermal and mechanical stresses arising in the glass and determination of the fracture inducing stress distribution in the block. An experimental study, based on tomographic examinations performed on full scale canisters containing glass and on water leach tests at 100 C to evaluate the fractured leachable surface area was, also conducted. The CASTEM code system was used to determine the temperature profiles versus time for the glass package. The mechanical study revealed the impact of removing the package from the furnace on the final stress loading. Controlled cooling of glass blocks must be extremely slow to have a significant effect on the stress loading.
1. THEORETICAL ANALYSIS OF THE THERMAL AND MECHANICAL CONDITIONS LIABLE TO INDUCE STRESSES LEADING TO FRACTURATION OF A GLASS BLOCK.

2. EXPERIMENTAL STUDY OF NON-RADIOACTIVE 400 KG GLASS BLOCKS 420 MM IN DIAMETER FABRICATED IN AN INDUSTRIAL PROTOTYPE FACILITY.
2.1. MEASUREMENT OF EXPERIMENTAL THERMAL CONDITIONS.
2.2. TOMOGRAPHIC EXAMINATION OF 400 KG GLASS BLOCKS (BAM).
2.3. ASSESSMENT OF FRACTURATION FROM THE GRANULOMETRY DISTRIBUTION OF GLASS FRAGMENTS.
2.4. ASSESSMENT OF FRACTURATION BY LEACHING IN WATER AT 100 CELSIUS DEGREES.

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Finanzierungsplan

CSC - Cost-sharing contracts

Koordinator

Commissariat à l'Energie Atomique (CEA)
EU-Beitrag
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Adresse
Centre d'Études Nucléaires de la Vallée du Rhône Cité de Marcoule
30205 Bagnols-sur-Cèze
Frankreich

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Letzte Aktualisierung: 23 Januar 1994

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Permalink: https://cordis.europa.eu/project/id/FI1W0182/de

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