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  1. Chapter 6: Material Management Helmut Steiner Ulrich Priesmeyer Kernkraftwerk Gundremmingen GmbH Priesmeyer, KRB A, 6. Material Management

  2. Material Management

  3. Expected Volume of Radioaktive Waste ... is in general determinded by • type and quality of construction materials • quality of the used nuclear fuel • age of the plant • operational history • availability of clearance levels for materials

  4. Volumes of LLW and ILW from Reactor Operations and Decommissioning in m³

  5. Major Primary Waste Stream • Burnable wastes (protective clothing, wood from ventilated hoods, laboratory furniture...) • Low to High level massive metallic wastes (reactor internals, reactor pressure vessel, primary pumps, reservoirs, valves, structural materials...) • Low to High level super-compactable metallic wastes (same sources as above plus e.g. electric cables, light supports, instrumentation...) • Massive concrete wastes from slightly activated or contaminated slabs, floors, shielding walls, room walls... • Concrete and bricks super-compactable rubble from demolition activities of activated or contaminated materials. • Sludges from deposits in reservoirs and liquid sumps. • Light non metallic super-compactable materials (isolation, asbestos...) • Special waste such as contaminated lead bricks and shielding.

  6. Radiological Characterisation • Protection of workers, public, environment • classification of operations • waste processing • costs

  7. Important Factors for Decommissioning • existence of a waste repository or at least • defined acceptance criteria for radioactive waste • criteria or clearance levels for unrestricted release of material

  8. Residuals and Removed Parts of the Plant Non-hazardous Re-use Release for Conventional Dump Radioactive Waste Melting Conditioning Deconta-mination Final Repository Re-use Refuse Disposal Site Ways of disposal

  9. Structure for material flow

  10. Definitions and working steps duringtreatment of material material arising during decommissioning checking if reuse or recycling is possible yes reuse no conditioning raw waste pretreatment: incineration, shredding, evaporation, etc. interim product treatment: drying, compaction,cementation, pouring, etc. waste product packaging container waste package interim storage final disposal

  11. contaminated piece of material economical investigation 1. cost / benefit-analyses 2. risk / benefit-analyses 3. conditioning / storage-analyses measurement or calculation of the contamination Above release limit negative positive choice of the appropiate decontamination process lower than release limit decontamination for the purpose of reuse decontamination for the purpose of recycling decontamination for the purpose of segmentation measurement of decontamination success measurement of decontamination success measurement of decontamination success material can be reused ? no material can be reused ? no Conditioning and packaging yes yes reuse recycling disposal as conventional waste final disposal Decontamination measures forpossible waste streams

  12. Example: KRB A

  13. Initial Status

  14. Mass Flow of contaminated andactivated Material at KRB A

  15. S 7,075 Mg 1,708 Mg 5,348 Mg Status: 30.06.02 Material Balance at KRB A

  16. Material Flow during Decommissioning systems + components operating material tools post-dismantling decontamination free release recycling waste

  17. Turbine Hall at KRB A

  18. Factors for Material Management

  19. Disposal or Recycling ?

  20. Example for contaminated material:Ice-Sawing of a Steam Generator

  21. Ice-Sawing of a Steam Generator

  22. Material Balance of a Steam Generator

  23. Recycling Campagne for Electric Cables

  24. Separation of Insulation and Copper

  25. Recycling Campagne for Electric Cables

  26. View into the Rector Pressure Vessel

  27. Example for activated Material:Dismantling of RPV Internals

  28. Container for Final Storage

  29. MOSAIK - Container

  30. Classification of RPV Material

  31. New Waste Container

  32. Onion Cast Container (Monolith)

  33. Prototype of a Onion Cast Container

  34. Technical Measures and Methods for Conditioning of Radioactive Waste SolidWaste - Direct packaging - Compaction - Super-Compaction - Incineration with super-compaction of ashes) LiquidWaste - Incineration - Fixation - Filtration, Decantation - Evaporation

  35. Waste Conditioning Methods

  36. In-drum Compactor

  37. Burnable Waste Compactor

  38. FAKIR - Supercompactor

  39. FAKIR - Supercompactor

  40. FAKIR - Supercompactor

  41. PETRA - Pellet Drying Plant