No Marking Required

Discharges and Environmental Monitoring 2012 Jim Desmond Environmental Monitoring & Assessments Manager WCSSG Environmental Health Sub-committee Date: 28 th November 2013 No Marking Required

12 October Dose pathways at Sellafield for marine discharges No Marking Required

12 October Sellafield marine monitoring locations No Marking Required

12 October Dose to marine critical group by Radionuclide (91  Sv - seafood consumption ) No Marking Required

12 October Pathway contributions to marine critical group total dose (130  Sv ) No Marking Required

12 October Pu(alpha) Concentration in Mussels vs. Marine Discharges No Marking Required

12 October Am Concentration in Mussels vs. Marine Discharges No Marking Required

12 October Dose from Mussel consumption for Pu(Alpha) and 241 Am No Marking Required

12 October Tc Concentrations in Lobster vs. discharges No Marking Required

12 October Dose from Lobster consumption for 99 Tc No Marking Required

12 October Dose pathways at Sellafield for aerial discharges No Marking Required

12 October Sellafield terrestrial monitoring locations No Marking Required

12 October Nuclide contributions to terrestrial critical group dose (Foodstuff 9.4  Sv, Total 12  Sv) No Marking Required

12 October Pathway contributions to terrestrial critical group dose (Foodstuff 10  Sv, Total 13  Sv) No Marking Required

12 October Review of the Monitoring Programme This is the seventh year of the revised monitoring programme. The programme continues to work well with no significant omissions. Audited by EA/NII in February 2009 and EU (Article 35) in August 2011 – no major issues identified. A Best Available Techniques style review of the environmental monitoring programme completed in September – Case-12-Dec-2011-for-website.pdfhttp://sellafieldsites.com/wp-content/uploads/2012/08/Environmental-Monitoring-BAT- Case-12-Dec-2011-for-website.pdf No changes to programme for No Marking Required

12 October Summary Marine discharges remain at historic low levels. Concentrations of actinides in molluscs continue to decrease. The combination of decreasing concentrations and consumption rates has resulted in a further reduction of marine critical group dose, 130  Sv. Dose to terrestrial critical group remains well below 20  Sv. Doses below 1000  Sv dose limit for the general public. No Marking Required