project Number ~Baltelle Pacific Northwest Internal Distribution Laboratories Date April 5, 1979 To W. J. Bair.1 From J. K. Sol /:>” “,,,, .“ ‘;.)3,, ‘i<z ‘,; ~ . ‘.. + da! ~~:w.tson ) BA Napier DL Strenge . ‘~~’’lle’” subject Dose Calculations for Enewetak Atoll Reference: Your memo same subject to J. K. Soldat/E. C. Watson, dated 4/5/79 Your offer to ask DOE to have PNL (and perhaps another laboratory or two) perform an independent assessment of the potential doses to future residents of Enewetak Atoll is in accordance with our discussions last week. We would be interested in performing the calculations as outlined in your memo. A quick estimate of time and cost has been made subject to ‘the conditions given below and to refinement when the work is better defined by DOE. . 2 man-weeks of technical manpower . computer time $3500 <500” $4000 TOTAL COST The time required to conduct the analysis would be two weeks after receipt of all necessary input data from LLL. The conditions are as follows: 1) Timing depends on potential interference of high-priority work on RHO High- and Low-Level Waste EIS’S. 2) We would use the following dose codes: ● ● DACRIN - inhalation (based on the new ICRP lung model) PABLM - ingestion of terrestrial and aquatic foods and drinking water, if required (based on the internal dosimetry model in ICRP Publication 2). 3) We have not yet developed any dose codes which incorporate the newer formulation in ICRP-26, nor do we plan to in the near future. However, the small number of dose results requested lend themselves to hand calculations of “effective” doses and/or S1 Units, if required. 4) We assume that external dose rates have been measured and calculations would not be required. A detailed calculation of the dose rates at various heights above ground contaminated with a known nuclide composition could be performed with a “shielding” type code. Such a calculation has not been included in the time and cost estimate provided above. 5) ... .,gc]-. ... v: .-., Doses would be calculated to the population group and to either an average or maximum member of the group depending upon availability