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RADIOACTIVE WASTE MANAGEMENT PART 2

RADIOACTIVE WASTE MANAGEMENT PART 2. A RAHMAN RWE NUKEM Ltd (UK). Name, company and chapter. Sources of Radioactive Waste. Operational activities POCO Decontamination Dismantling Land remediation. Management of Radioactive Waste. From generation of waste. To disposal of waste. Hazards.

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RADIOACTIVE WASTE MANAGEMENT PART 2

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  1. RADIOACTIVE WASTE MANAGEMENTPART 2 A RAHMAN RWE NUKEM Ltd (UK) Name, company and chapter

  2. Sources of Radioactive Waste • Operational activities • POCO • Decontamination • Dismantling • Land remediation

  3. Management of Radioactive Waste From generation of waste To disposal of waste

  4. Hazards Disposed Unmanaged Managed Conditioned Variation of hazards with RWM Hazards in RWM

  5. Physical States of waste Solids: Contaminated materials, equipment, pipes, cables, concrete, rubbles etc Liquids: Arising from decontamination work, waste treatment plant, water purification system etc. Gases: Arising from decontamination processes, dismantling activities etc.

  6. Waste types Primary wastes: contaminated and activated original materials. Secondary wastes: from processing of primary waste, from decontamination and other associated processes.

  7. Treatment objectives • Volume reduction • Removal of activities • Suitable composition

  8. Conditioning objectives • Conversion to solid form • waste form • Suitable for long term storage or disposal

  9. Waste and materials Pre-treatment Treatment Cleared Material (general) Cleared Material (specific) Conditioning Storage and Disposal

  10. Various types of Treatment • Solid waste: (i) Compaction (ii) Incineration • Aqueous effluent: (i) Chemical precipitation (ii) Evaporation (iii) Ion exchange • Gaseous waste: (i) HEPA filters (ii) Adsorption or chemisorption (iii) Scrubbing (iv) Cryogenic retention

  11. Types of Treatment for Solid Waste • No compaction, no incineration • No compaction, incineration • Pre-compaction, no incineration • Pre-compaction, incineration

  12. Burnable Waste Compactor(Low force Compactor)

  13. In-drum Compactor(Low force Compactor)

  14. Pallet Drying Facility (PETRA) • At pressures of 20 – 50 mbar (abs) • At temperatures of about 3000C • Up to about 8 drums at a time

  15. Super-compactor with horizontal piston (FAKIR) 1: Exit 2: Sliding door 3: Jib crane 4: Grab 5: Compactor chamber 6: Tipping device 7: Charger 8: Working platform 9: Hydraulic system and control 10 Hydraulic cylinder 11: Ram

  16. 200 l drum

  17. Compacting a metal drum

  18. Incineration – Shaft kiln with tipping grate

  19. Evaporation plant for LLW

  20. Waste Receipt Assay Characterisation and Super-compaction (WRACS) at Dounreay

  21. Super-compacted drum on a product line at Dounreay

  22. ‘Pucks’ lowered by crane on a HHISO container at Dounreay

  23. HHISO to the monitoring and inspection area at Dounreay

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