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

contribute substantially to the total flux of C-14 labelled gas, specifically Vaults 17, 18and 19.Note that differences in GRM outputs between the RDA and EDA near-fieldassessments indicate initial fluxes of C-14 labelled gases for the RDA vaults differ atearly times compared to the original RDA assessment. The differences are notable butnot major e.g. peak fluxes differ by a factor less than two (Figure 5-3). This is thoughtto be related to updates to the GRM configuration and associated biogeochemicalinteractions.10 12 YearTotal Flux of C-14 LabelledGas from Area (Bq y-1)10 1010 810 6TrenchesRDA VaultsEDA Vaults10 42100 2200 2300 2400 2500 2600 2700 2800 2900 3000Figure 5-1: Total Decay Corrected Fluxes of C-14 Labelled Gas from the Wastes forthe Reference Case, Case2_InvA (Bq y -1 )10 12 YearTotal Flux of C-14 LabelledGas from Area (Bq y-1)10 1010 810 6Vault 15Vault 16Vault 17Vault 18Vault 19Vault 2010 42100 2200 2300 2400 2500 2600 2700 2800 2900 3000Figure 5-2: Total Decay Corrected Fluxes of C-14 Labelled Gas from the Wastes forthe Reference Case over Specific EDA Vaults, Case2_InvA (Bq y -1 ). Only FluxesGreater than 1E+4 Bq y -1 are shown.18