230 Health Physics August 2010, Volume 99, Number 2 Table Al. (Continued) Source of data Radionuclide U.S. Naval 8Sr Year of collection Chemical separation method (where applicable) Oxalate precipitation using a small urine aliquot Alternative method: Carbonate precipitation of the entire 24-h urine sample, if collected later than 2.5 mo past detonation Mentioned, but no information was provided Mentioned, but no information provided Radiological Defense Laboratory (Cronkite et al. 1956) Ra Gross beta Comments on measurement methods Counting method Precipitate counted using thin-window G-M counter Standard source was used for calibration of counter Self-absorption correction was made using Sr standard The method eliminates the normal “°K Data quality Satisfactory if Sr activity is much greater The precipitation method is non-specific and ”°Sr could interfere if present than °°Sr (likely to have been the case) Not evaluated Not evaluated Table A2. Summary of USNRDL and HASLurine analysis (volumes in mL and gross beta activity in d m7’) at four times post-detonation (Cronkite et al. 1956). Approximate time post-detonation and bioassay data 1 1/2 mo Population and age group Rongelap Number of subjects Ave. vol. (mL) per 24h 2 1/2 mo 3 mo Avg. dis Number of Avg. vol. (mL) per Avg. dis Number of min™' subjects 24h min™! subjects 6 mo Ave. vol. (mL) per Avg. dis Number of Ave. vol. (mL) per Avg. dis 8 12 33 360 510 625 12 5 0 — 3 12 — 400 655 — 0 0 24h min™! <Sy 5-16 y >16y 7 11 13 165 439 581 404 758 1,208 — — 10 — — 824 — — 705 — — 10 379 — — 339 <5 y 5-16 y >16y 1 2 10 150 275 722 217 126 553 — — — — — — — — — — — — — — — — — — Ailinginae American military weather observers (adult) 25 1,158 309 — — — — — — subjects 24h — min“! —