Annual Report for 2010/11 and Forward Programme - Sellafield Ltd

SSEM/2011/4730 June 20115. What is the activity distribution of the particles population?What is the activity distribution of the particles population?5.1 What are the key radionuclides and how many particles of each type are there?5.2 What LOD do we need to achieve?5.3 How many particles do we need to analyse by:5.3.1 Coarse screening?5.3.2 Detailed analysis?5.4 What does the activity of ‘Finds’ tell us about the distribution of the ‘True’ populations?5.5 Is there a temporal change in the activity distribution (including spatial – Q3)?5.6 Does any temporal change tell us about the source term (refer to Q2) or ultimate environmental fate?5.7 Can we reliably model the activity distribution of the particles population?Key Workstreams:Beach Monitoring ProgrammeOffshore Monitoring ProgrammeStatistical Analysis Contract6. Where are the particles going?6.1 Are they moving into high risk areas such as Mussel beds?Where are the particles going?6.2 Over what time-frame do particles move from their ‘original’ location (both on and off-shore) to their‘current’ location?6.3 Are we observing re-population between on-shore and off-shore particles or does location remainstatic (i.e. covered to uncovered at the same location)?6.4 How long do they remain as ‘particles’ in the environment?6.5 What is the maximum distance an independent particle can travel in the marine environment off theWest Cumbrian coast?6.6 Can we reliably model the transportation and dispersion of particles?Key Workstreams:Beach Monitoring ProgrammeOffshore Monitoring ProgrammeStatistical Analysis Contract© Nuclear Decommissioning Authority 2011. 92