Appendix CRF - Part 3 - Northamptonshire County Council

Groundwater Pathway, Site Boundary Drinking Case, (Table 5.1 Annex B)
Radionuclide
Specific Dose
(microSv/yr
per MBq)
Radiological Capacity
(MBq)
(3 mSv/yr dose
criterion)
Application for disposal of LLW including HV-VLLW under RSA 1993,
for the East Northants Resource Management Facility:
Supporting Information
Tonnage Capacity (tonnes)
(@200 Bq/g concentration)
H-3 6.89E-23 4.35E+25 2.18E+23
Ba-133 3.25E-24 9.23E+26 4.62E+24
Eu-152 4.84E-25 6.20E+27 3.10E+25
Eu-154 7.98E-28 3.76E+30 1.88E+28
Co-60 3.79E-32 7.92E+34 3.96E+32
Eu-155 1.29E-33 2.33E+36 1.16E+34
Sb-125 2.03E-34 1.48E+37 7.39E+34
Cs-134 8.12E-36 3.69E+38 1.85E+36
Fe-55 4.45E-36 6.74E+38 3.37E+36
Pm-147 1.47E-36 2.04E+39 1.02E+37
Ru-106 1.67E-38 1.80E+41 8.98E+38
8.14 Post –Closure not expected to occur
Exposure by Intrusion into the Emplaced Waste Post Closure of
the Landfill
8.14.1 The dose criterion is the lower dose guidance level of 3 mSv/yr for the public and
workers for an intrusion scenario.
8.14.2 The scenario applies to members of the public and workers post-closure and is
uncertain to occur.
8.14.3 The scenario is assessed in Annex B, table 5.3 in the “Intruder, 60 years case
and the Resident 60 years case”. The scenario is that either workers or
members of the public intrude into the waste. For the public case the scenario
includes residence on the waste material after intrusion.
8.14.4 The resulting radiological capacities and tonnage capacities (based on the
maximum concentration of 200 Bq/g) are shown below in order of ascending
capacity with the most restricted capacity nuclides at the top of the table.
8.14.5 These scenarios have the potential to constrain landfill capacity.
July 2009
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WS010001/ENRMF/CONSAPPCRF 396