Plutonium in Soil Around the Rocky Flats Plant.

Abstract

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Remote Plutonium Contamination and Total Inventories from Rocky Flats

“…The on-site inventory in Table 2 is about five times greater than earlier estimates (KREY and HARDY, 1970;KREY and KRAJEWSKI, 1972) because those initial calculations did not attempt to account for increasing deposition concentrations within the 2000 mCi/km2 contour. The off-site inventory is the more reliable result because it is based upon more data and less extrapolation.…”

“…1. The 1.3 mCi km2 contour was reproduced from an earlier study ( KREY and HARDY, 1970) where it was shown as 3.0 mCi/km2, including the 1.7 mCi/ km2 of global background. Using the 1.3 mCi/ km2 contour in Fig.…”

“…where C , = global fallout atom ratio, using the coring technique C , = 0.051, the atom ratio of weapons grade plutonium fabricated at the Rocky Flats plant (KREY and KRAJEWSKI, 1972), (KREY and HARDY, 1970) were collected during September and October 1972 at locations indicated in Fig. 1.…”

Technical Basis of Dose Reconstruction

“…The expertise of the EML in collecting and analyzing soil samples was immediately brought to bear on this problem; their results (Krey and Hardy 1970) confirmed those of the CCEI; however, it eventually became clear that the Rocky Flats Plant numbers for releases through the stacks were essentially correct, also.…”

Rocky Flats closure: The role of models in facilitating scientific communication with stakeholder groups

“…In order to determine the location, area, and volume of soil potentially requiring evaluation, management, or remediation, a massive Site characterization effort occurred at Rocky Flats, beginning in the late 1960s [14]. Between 1991 and 1999, nearly 2500 surface soil samples were collected and analyzed for 239/240 Pu and 241 Am across the Site to assess the level and extent of actinide contamination [15].…”