Appendix CRF - Part 3 - Northamptonshire County Council

18.0 Conclusion
18.0.1 A proposed set of outline arrangements, waste acceptance criteria and potential
authorisation conditions has been described for a process to dispose of solid
LLW wastes to East Northants Resource Management Facility.
18.0.2 A consequence and risk assessment has been carried out for the public and
workers in the long and short term. The radiological capacity of the landfill site
has been back calculated in order to meet defined risk and dose targets. In
addition, operational arrangements and constraints have been proposed using
best practicable means to further reduce risk and optimise exposures.
18.0.3 The proposal is that the capacity of the landfill is subject to a total capacity limit
combined with a series of other conditions. The total capacity limit would apply
from the date of issue until closure of the landfill or until the capacity is reached.
The landfill would receive no more LLW under the permit once the capacity limit
is reached. The capacity limit cannot be expressed as a single number because
it depends on the mixture received up to any point in time, so the proposal is for a
continuously revised capacity limit based on individual nuclides (including
appropriate daughter chains). The total capacity limit would be established using
an authorised spreadsheet model agreed with the regulator. The spreadsheet
model would represent the most restrictive case from the risk assessment and
would produce as an output the remaining capacity of the landfill on an individual
nuclide basis given the exact wastes received to that point in time. Prior to
accepting any further waste the model would be used by the landfill operator to
determine that the consignment would not lead to a breach of the total capacity
limit.
18.0.4 It is submitted that the proposal for disposal of LLW is justified.
Application for disposal of LLW including HV-VLLW under RSA 1993,
for the East Northants Resource Management Facility:
Supporting Information
July 2009
115
WS010001/ENRMF/CONSAPPCRF 434