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

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0977-6Version 1Vaults 15 and 16 (grid cells C10 and A10) contain high initial 239 Pu and 240 Puactivities and drilling into these cells would result in relatively high dose to theintruder via the dust inhalation pathway. Figure 6.3 and Figure 6.5 indicate thecontribution to dose of the main radionuclides for intrusions in grid cells A10 and C10occurring between 2230 and 7000. Figure 6.4 and Figure 6.6 show the dose fromeach exposure pathway. The potential dose from drilling at these locations (C10 andA10) is dominated by plutonium inhalation exposure.0.000160.000140.00012Dose (mSv)0.000100.000080.000060.000040.000020.00000A & B10C & D11E & FFigure 6.1Total dose to the driller (B1a) from a drilling intrusion at differentlocations in the year 2230 (Case A).Galson Sciences Ltd 22 21 March 2011
0977-6Version 10.000160.000140.00012Dose (mSv)0.000100.000080.000060.000040.000020.00000A & B10C & D11E & FFigure 6.2Total dose from drilling intrusion (B1a) at different locations in theyear 7000 (Case A).0.001Dose (mSv)0.00010.00001TotalE_ext_borehole[Cs137]E_inh_borehole[Am241fAm241]E_inh_borehole[Pu239fPu239]E_inh_borehole[Pu240fPu240]E_inh_borehole[Am241fPu241]E_inh_borehole[Pu238fPu238]E_ext_borehole[Ra226fRa226]E_ext_borehole[Ag108m]E_inh_borehole[Th228fTh232]E_ext_borehole[Th228fTh232]E_ext_borehole[Nb94]0.0000012000 3000 4000 5000 6000 7000Year (CE)Figure 6.3Main radionuclides contributing to dose for drilling intrusion (B1a) atgrid cell A10 (Vault 16) (Case A). The legend indicates exposurepathway, radionuclide contributing to dose (X) and source radionuclidein the inventory (Y, in form [XfY]). (The horizontal time axisrepresents the year in the Current Era.)Galson Sciences Ltd 23 21 March 2011
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