Baldwin TD and Hicks TW, Assessment Calculations for Human ...
Baldwin TD and Hicks TW, Assessment Calculations for Human ...
Baldwin TD and Hicks TW, Assessment Calculations for Human ...
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0977-6Version 16.1.7 C1 – In<strong>for</strong>mal ScavengingFigure 6.29 <strong>and</strong> Figure 6.30 show the total annual dose to a scavenger on the site inthe years 2310 <strong>and</strong> 7000, respectively, during the period of site erosion by the sea.The results are similar in spread to those <strong>for</strong> 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 <strong>and</strong> 240 Pu contributesubstantially to the calculated dose, as found <strong>for</strong> the driller, but greater externalirradiation exposure time <strong>for</strong> the scavenger (see Table 5.3) means that 94 Nb is themost significant contributor to dose. Figure 6.31 <strong>and</strong> Figure 6.32 show the mainradionuclides contributing to dose <strong>and</strong> the exposure pathways <strong>for</strong> 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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