Plutonium in sediments—apparent half-lives

Aquatic sediments

“…A risk-assessment model 616 based on the hypothesis that the reduction of plutonium activities from sediment surfaces can be approximated as first-order reactions predicted apparent half-lives in the range of 7-20 years for three different types of Baltic sediment. 174 The heavy mineralrich beach sands of Florida were monitored for gross gamma radiation and used to estimate bulk volume, fluctuations in time, and position to describe sand redistribution patterns.!" This proved a rapid and relatively simple method compared to existing methods.…”