Document library

You can use the filters to show only results that match your interests

Showing 73 documents

5B22 - ADU Floc
The floc results from the decontamination of high alpha MA/LA liquors from the PFR fuel reprocessing plant.

Nuclear Restoration Services Ltd (NRS) | Dounreay | ILW


223 KB

94 KB

5B24 - Operational CHILW
Reprocessing support, analytical and waste facilities and development work. Wastes from POCO may also be included.

Nuclear Restoration Services Ltd (NRS) | Dounreay | ILW


199 KB

94 KB

5B25 - ILW Shaft (Contents)
Miscellaneous waste disposals from all operations at Dounreay from 1959 to 1977, mainly from early reprocessing operations and supporting operations i.e. PIE etc. Additionally, there is waste from other sites notably HMS Vulcan and Harwell. Post 1971, some "special" waste was disposed of to the Shaft; this included large items and a number of breeder and dummy breeder elements.

Nuclear Restoration Services Ltd (NRS) | Dounreay | ILW


206 KB

96 KB

5B26 - LLLETP Sludge
This waste stream consists of sludges which will be produced as a result of operations in the Low Level Liquid Effluent Treatment Plant (LLLETP) at Dounreay. The sludges themselves will consist of a mixture of ferric and aluminium hydroxides.

Nuclear Restoration Services Ltd (NRS) | Dounreay | LLW


204 KB

93 KB

5B27-1 - Thorium Nitrate (500L Drums)
Recovery of thorium from THTR spheres by crushing and rolling the spheres, followed by density based air-separation of graphite from fuel, which could then be disposed of separately. Fuel particles were dissolved in HNO3/NH4F solution, then separated by solvent extraction in mixer-settler boxes. The thorium nitrate was evaporated to concentration of around 400 g/l, then allowed to cool and settle.

Nuclear Restoration Services Ltd (NRS) | Dounreay | ILW


195 KB

94 KB

5B27-2 - Thorium Nitrate (6m3 Box)
Recovery of thorium from THTR spheres by crushing and rolling the spheres, followed by density based air-separation of graphite from fuel, which could then be disposed of separately. Fuel particles were dissolved in HNO3/NH4F solution, then separated by solvent extraction in mixer-settler boxes. The thorium nitrate was evaporated to concentration of around 400 g/l, then allowed to cool and settle.

Nuclear Restoration Services Ltd (NRS) | Dounreay | ILW


197 KB

94 KB

5B28 - Graphite/THTR Waste
The waste consists of crushed graphite spheres contaminated with uranium and thorium.

Nuclear Restoration Services Ltd (NRS) | Dounreay | ILW


195 KB

93 KB

5B29 - LSA Scale
Between 1989 and 2003 pipeline tubulars and platform components originating from North Sea offshore operations have been cleaned in a dedicated facility on the Dounreay Site. The cleaning operation is required to remove the Low Specific Activity (LSA) scale which is deposited on the pipeline and associated equipment while it is in service. This waste has been disposed of at Low Active Landfill.

Nuclear Restoration Services Ltd (NRS) | Dounreay | LLW


185 KB

92 KB