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Identification and consequences of the BNFL source term in the near-field transfer of radionuclides (COMPLETED 3/93) - AE0108

R&D Summary Objectives:- Further describe the physical and chemical nature of the BNFL effluent from Sellafield and investigate the influence that particulate matter has on the pattern and rate of dispersion of radio nuclides. Key customer purpose:- Provide essential input to the MAFF predictive model on the dispersal of radioactive matter and thus enable MAFF to base its authorisation of radioactive discharges from Sellafield on a sound scientific understanding.
1. To determine the presence, if at all, of new solid phases which are formed, e.g. iron flocs, and describe their environmental pathways and stability. 2. To evaluate the importance of iron-manganese coatings to sediments near Sellafield as possible products of changes which occur at the outfall. 3. Following a comprehensive evaluation of the composition of the effluent today, when radio nuclide releases are low compared to the past, to determine whether or not specific materials can be found, then to search for them in historical samples and trace their environmental pathways. 4. The role of biota in sequestering solid phases will be considered in order to determine the influence of productivity on retention of radionuclides and transfer to bottom sediments. 5. Suspended particulate debris, and the association of radionuclides in marine biota will be determined in order to identify the presence of phases (e.g. solids) derived from the effluent, before or after it enters the sea. The objective is to identify any biological related transfer process.
Time-Scale and Cost
From: 1991

To: 1993

Cost: £87,542
Contractor / Funded Organisations
Phoenix Research Laboratory
Fields of Study
Environmental Protection - Marine