Appendix A ESTIMATED 30-YEAR INTEGRAL DOSE VS RATE OF REMOBILIZATION PROM DOME The total stock of transuranics present at any time in the lagoon due to leaching from the dome can be estimated by assuming that: the rate of remobilization is proportional to the quantity of transuranics remaining in the dome and the remobilized transuranics are removed by tidal flushing from the lagoon with a turnover time t. This problem is mathematically analagous to a tworstage radioactive decay process in which the increased standing stock in the lagoon is analagous to the amount of the intermediate nuclide present. If remobilization takes Place with an effective half-life T, then the increased standing stock 4S is given by: AS = TAC, ettent/t] Pos where A = 0.693/T. If it is assumed that the dose rate from marine foods is proportional to the standing stock of transuranics in the Lagoon (this effectively is the usual “concentration factor" assumption), then the extra 30-year dose from 4S can be written as: 4039 =D Ss 0 30 f (as)dt or 4D39 = TDC, fa-en202y ca (arer20!7)] Ss ao a} Csi oy cd CFT. 39