Technical Studies

• Option, Scoping and Feasibility Studies
• Concept and Process Design
• Detailed Decommissioning Methodology
• Plant Decommissioning Programmes (PDPs)

Recently completed projects include:    Less

• Preparation PDPs for Dounreay Fuel Pond, Various PIE Caves, Fuel Fabrication Plant, Waste Handling and Decontamination facility, Low Active Effluent Pits, DMTR Complex, Drum Store, Plutonium Criticality Facility, Laundry, minor buildings
• Post Decommissioning Reports for FCA plant at Dounreay
• Determination of Dounreay Prototype Fast Reactor (PFR) Radionuclide Inventory
• Development of the concept, waste routes and PDP for Dounreay Materials Test Reactor decommissioning
• Study into use of Commercial Plant for Decommissioning of Nuclear Facilities
• Study into the minimisation of residual NaK coolant in DFR
• Detailed methodology for Decommissioning Liquor Sentencing Tanks
• Preparation PDPs for Dounreay Fuel Ponds, PIE Caves, Fuel Fabrication Plant, Waste Handling and Decontamination facility, Low Active Effluent Pits, DMTR Complex, Drum Store, Plutonium Criticality Facility, Inactive Laundry, minor buildings
• Preparation of detailed waste plans within DMTR
• Study and Trials into the destruction of Sodium Filled Coupons
• DFR NaK wetted items disposal study
• Design, Development, Supply of a BNFL Radiological Drain Survey System
• Study/Specification for a Radiological Drain Survey System for UKAEA
• Option Study into Debris Removal from the Dounreay FCA Stack
• Option Study for Dounreay Low Active Drain Survey
• Feasibility Study and Trials into Radionuclide Underwater Discrimination
• Option Studies into Working Environment and ROV use in AETP
• Determination of PFR Radionuclide Inventory
• Development of the concept, waste routes and PDP for DMTR decommissioning
• Design for the DN060 Dounreay Decontamination Facility including ventilation
• Preliminary assessment of Windscale B14 decommissioning and ventilation

Ventilation Design & Commissioning    Less

• Concept, Scheme and Detail Design
• Design Assessment and Justification
• Ventilation Design Substantiation
• Ventilation System Fabrication, Installation and Commissioning: see Equipment page

The long list of ventilation projects which NDSL has delivered includes:

• Scheme design of two-stack system for the FCA linking Corridor at Dounreay; assistance with tender assessment and implementation
• Design of ventilation system for the Akcros chemical factory at Eccles
• Design of ventilation system for a Uranium Recovery Palnt at Dounreay
• Ventilation Design projects on Dounreay facilities including DFR NDP, DFR IXP, PFR AMCL, Fuel Recovery Plant, Plutonium Criticality Facility, Pulse Column Laboratory, Fuel Reprocessing Plant.
• Design and commissioning of Hunterston A CCP Bay ventilation system
• Detailed assessment for UKAEA of the FCA Corridor Ventilation Design
• Design of Hunterston A NCWPF 1 Ventilation System
• Design of Ventilation System for BNFL Sellafield Archive Store
• Ventilation design/commissioning projects on DFR NaKDP, DFR IXP, PFR AMCL, DMTR, Fuel Recovery Plant, High Active Liquor Store, FCA Linking Corridor, Contact Handleable ILW Drum Store, Plutonium Criticality Facility, PFR Fule Reprocessing Plant, Pie Caves
• Design of the ventilation system upgrade for Dounreay DMTR Services facility
• Design of the decommissioning ventilation system for Hunterston A Fuel Tunnels
• Scheme and detail design of the DFR Ion Exchange Plant ventilation system
• Design for the Dounreay 'Shot Blast' Decontamination Facility including ventilation
• Preliminary assessment of Windscale B14 decommissioning and ventilation
• Design and commissioning of Hunterston A CCP Bay ventilation system
• Design of the Hunterston A Non-Compactable Waste Facility ventilation system

Safety & Environmental Projects    Less

• Preparation of Safety Case Documentation
• Assessment of Radionuclide Inventories
• Assistance with UNOR Clearance
• Peer Review of Safety Cases

Examples of completed projects are:

• Determination of PFR Radionuclide Inventory
• Safety Cases and Modification Reports for a variety of Dounreay decommissioning projects, including the Sentencing Tanks, DMTR, Sodium Test Rig Building, and Active Workshops.
• Processing of UNORs for PFR
• Safety Case for Winfrith Sodium Coupon Disposal Project
• Provision of Health Physics Support to Salvage of Submarine Kursk
• Determination of PFR Radionuclide Inventory
• Review of PFR LMD Project Handover documents
• Development of HAZANs for Active Laboratories
• Processing of UNORs for Dounreay PFR
• Feasibility Study and Trials into Radionuclide Underwater Discrimination
• Safety Documentation for decommissioning of Pie Caves, DMTR, Sodium Test Rig Building, Active Workshops
• Safety Case for the disposal of 34,000 sodium filled coupons at Winfrith
• Drafting of safety cases (SAMs/DMRs) for DMTR Sentencing Tanks Decommissioning