Limer LMC, Assessment Calculations for C-14 Labelled Gas and ...

Calculated Effective Ingestion DosesPotential impacts from ingestion are calculated for four different PEGs, as noted inSection 2.3. The PEGs may reside over any part of the trenches, RDA vaults or EDAvaults. It is considered there is an equal probability that they would establish theirgarden or smallholding in any part of that region. Thus, average fluxes associated withrelevant regions of the cap are used to calculated potential impacts. Figure 5-5 presentscalculated potential impacts at 100 year intervals following the completion of the finalcap.The effective annual ingestion dose target of 20 µSv is again indicated using a blackline. Consistent with the average flux data (Figure 5-4), for the trenches, the potentialexposures are lower than the guidance dose level within 100 years following thecompletion of the cap. However it is anticipated that it would take nearer 350 and 300years for the dose associated with the RDA and EDA vaults, respectively, to drop tosuch a level. The calculated annual doses are also presented in Table 5-1Error!Reference source not found.; calculated doses which exceed 20 µSv are shown in redfont.20