Appendix CRF - Part 3 - Northamptonshire County Council

Radiological Assessment 0820-2
Version 2
4.3.2 Fire.....................................................................................................41
4.3.3 Barrier failure ....................................................................................41
4.3.4 Site remediation and re-engineering..................................................42
4.3.5 Bathtubbing .......................................................................................42
5 Dose Calculations.................................................................................................43
5.1 Groundwater pathway ...................................................................................43
5.2 Irradiation pathway........................................................................................45
5.3 Intrusion.........................................................................................................46
5.4 Leachate management and spillage ...............................................................48
5.4.1 Leachate management .......................................................................48
5.4.2 Leachate spillage ...............................................................................49
5.4.3 Aerosol pathway................................................................................51
5.5 Gas pathway ..................................................................................................52
5.7 Dose rates to wildlife.....................................................................................53
6 Radiological Capacity..........................................................................................59
6.1 Introduction ...................................................................................................59
6.2 Radionuclide-specific radiological capacities ...............................................60
6.3 Overall radiological capacity.........................................................................63
7 References.............................................................................................................66
Appendix A Dose calculations ............................................................................67
A.1 Doses during site operations..........................................................................67
A.2 Doses to site residents after closure...............................................................68
A.3 Doses during and after excavation of waste ..................................................69
A.3.1 Dose to the Excavator........................................................................69
A.3.2 Dose to Site Resident after Excavation .............................................71
A.4 Doses arising from use of contaminated groundwater ..................................74
Appendix B Radionuclide-specific data ............................................................76
Appendix C Sensitivity Studies ..........................................................................79
C.1 Groundwater Pathway ...................................................................................79
C.2 Leachate Spillage...........................................................................................87
Galson Sciences Limited iv 14 July 2009
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