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

SSEM/2011/4730 June 20117. What are the physical and chemical properties of the particles?What are the physical and chemical properties ofthe particles?7.1 What do we need to know about the physical and chemical properties to support:7.1.1 Categorisation?7.1.2 Source term identification?7.1.3 Modelling?7.1.4 Risk (i.e. dose factors)?7.1.5 BPM for particle detection?7.2 Can we reliably model the properties of particles?Key Workstreams:Beach Monitoring ProgrammeOffshore Monitoring ProgrammeParticle Analysis Contract8. How long have the particles been in the environment?How long have the particles been in theenvironment?8.1 How long have particles been available for transportation in the environment (i.e. may have beensitting static in the pipeline for an unknown period of time)?8.2 How does time in the environment affect the physical & chemical properties of particles?8.3 What is the diversity of environmental conditions (buried/surface/storm transport/tidaltransport/mud/silt/sand/boulder/pebble)? How does time spent in different conditions influenceparticle behaviour over time?8.4 What age of particles would be considered to originate from ‘current’ operations?8.5 What information is available on when pipeline cutting/removal has taken place, diffusers replaced orwhen environmental release events have occurred, that may assist in making modelling assumptionson ‘origins’ of releases?8.6 Have particles that have travelled the furthest been in the environment the longest?8.7 Can we reliably model the transportation and dispersion of particles?Key Workstreams:Beach Monitoring ProgrammeOffshore Monitoring ProgrammeParticle Analysis ContractStatistical Analysis Contract© Nuclear Decommissioning Authority 2011. 93