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

SSEM/2011/4730 June 20112. What is / are the source(s)?2.1 Determine how many potential sources of particles there are2.1.1 From which plants and processes do they come & when did such discharges occur?2.1.2 Were they historic discharges from abnormal events?2.1.3 Were they historic routine discharges from the days prior to filtration?2.1.4 How do pebbles & stones behave to long term activity exposure (e.g. in old sections of pipeline)2.1.4.1 What is the maximum activity a pebble or stone can absorb/adsorb?2.1.4.2 Can this maximum be reached while using the current discharge system?What is / are the source(s)?2.1.5 How does sand and rusty metal behave to long term activity exposure (e.g. in old sections ofpipeline)?2.1.5.1 What is the maximum activity a sand or rust particle can absorb/adsorb?2.1.5.2 Can this maximum be reached while using the current discharge system?2.2 Consider the 1983 Beach Incident discharge:2.2.1 What was discharged?2.2.2 Is there a modern analogue that can be analysed?2.2.3 In 1983 why didn’t we see anything like we can see today, resulting from this discharge?2.3 Consider the Pipeline recovery work of the late 1990s and 2003:2.3.1 Can we acquire and sample a piece of recovered pipeline from LLWR?2.3.2 Can we determine from those involved in the pipeline recovery project what the condition of thepipeline was?2.4 Can we reliably model the sources of particles?Key Workstreams:SL Particles Sources and Pathways Working GroupBeach Monitoring ProgrammeParticle Analysis Contract© Nuclear Decommissioning Authority 2011. 89