Baldwin TD and Hicks TW, Assessment Calculations for Human ...

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0977-6Version 110Dose (mSv)10.1TotalE_ing_smallholder_GenericPlant[C14]E_ing_smallholder_GenericPlant[Cl36]E_ing_smallholder_GoatsMilk[C14]E_ing_smallholder_GoatsMilk[Cl36]E_ext_smallholder_inside[Cs137]E_ing_smallholder_GenericPlant[Sr90]E_Rn222_Ra226_smallholder0.012000 3000 4000 5000 6000 7000 8000 9000 10000 11000 12000Year (CE)Figure 6.27 Main radionuclides that contribute to annual dose to a smallholder (B7)at grid cell E10 (Vault 17) (Case A). The legend indicates exposure pathway,radionuclide contributing to dose and source radionuclide in the inventory.6.05.0Dose (mSv)4.03.02.01.0TotalExternal (inside)External (outside)InhalationIngestion (subtotal)Ingestion (Goat's milk)Ingestion (eggs)Ingestion (plants)Ingestion (soil)Rn2220.02000 3000 4000 5000 6000 7000 8000 9000 10000 11000 12000Year (CE)Figure 6.28Annual dose from different exposure pathways for a smallholder (B7)at grid cell E10 (Vault 17) (Case A).Galson Sciences Ltd 38 21 March 2011
0977-6Version 16.1.7 C1 – Informal ScavengingFigure 6.29 and Figure 6.30 show the total annual dose to a scavenger on the site inthe years 2310 and 7000, respectively, during the period of site erosion by the sea.The results are similar in spread to those for a trial pit digger or construction worker,with the highest calculated annual dose corresponding with intrusion into grid cellE11 (Vault 20) at 2310 (1.2 x 10 -3 mSv). Inhalation of 239 Pu and 240 Pu contributesubstantially to the calculated dose, as found for the driller, but greater externalirradiation exposure time for the scavenger (see Table 5.3) means that 94 Nb is themost significant contributor to dose. Figure 6.31 and Figure 6.32 show the mainradionuclides contributing to dose and the exposure pathways for cell E11 (Vault 20).Only results after 2310, the earliest expected time of site contact by coastal erosion,are presented. The calculated annual dose ranges from 6.7 x 10 -4 mSv in grid cell E10(Vault 17) to 1.2 x 10 -3 mSv in cell E11 (Vault 20).0.00120.0010Dose (mSv)0.00080.00060.00040.00020.0000A & B10C & D11E & FFigure 6.29Total annual dose to a scavenger (C1) in the year 2310 (Case A).Galson Sciences Ltd 39 21 March 2011
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