Retention and Excretion Curves of Persons Containing 90Sr and 226Ra After a Chronic Contamination

Abstract

A woman dial painter born in 1930 was exposed to 226Ra intake from

9OSr +90Y bremsstrahlung efficiency predicted for humans

“…Table 2 of Wenger and Soucas (1975) gives their estimate for her 9°Sr content in late 1968 as between 0.95 and 1.04 ~Ci, assuming a bremsstrahlung efficiency 4 of 1.6, whereas an extensive series of measurements made at the Radioactivity Center, Massachusetts Institute of Technology (M.I.T.) in 1968, yielded an estimate which was reported to be about 1.6 vCi using a bremsstrahlung efficiency equal to that assumed by Dudley and BenHaim (1968) of about 1.4 (Evans et al, 1969, Holtzman et al, 1975, Wenger and Soucas, 1975.…”

“…Table 1 of Wenger and Soucas (1975) indicates a Z26Ra burden of between 0.159 and 0.165 ~Ci for late 1968. The mean 214Bi burden determined in 1965 by the seven European laboratories was 0.056 ~Ci.…”

“…There has been renewed interest in the metabolism of strontium in man (Wenger et al, 1968;Dudley and BenHaim, 1968;Evans et al, 1969;Czosnowska et al, 1972;Marshall et al, 1973;Holtzman et al, 1975;Ilyin et al, 1975;Wenger and Soucas, 1975). Body burdens of 9°Sr in excess of about 0.1 ~Ci can be detected in the skeletons of living humans by means of the bremsstrahlung x-rays produced by the /3-decay of 9°Sr and its daughter 90y (Van Dilla et al, 1955;Mays et al, 1958;Rundo, 1959;Lid~n, 1959;Cohn, 1963).…”

Immune System Modifications Induced in a Mouse Model of Chronic Exposure to90Sr

“…In two dial painters, rates of urinary and fecal excretion of radium approximately 10 years after the exposure were approximately 0.03 and 0.01% of the body burden per 24 hours, respectively (Wenger and Soucas 1975). The urine:fecal excretion ratio of 3 that was observed in the radium dial workers is consistent with ratios of 2-6 observed several days to weeks after subjects received an intravenous injection of SrCl 2 (Bishop et al 1960;Blake et al 1989aBlake et al , 1989bLikhtarev et al 1975;Newton et al 1990;Samachson 1966;Snyder et al 1964;Uchiyama et al 1973).…”

“…In two dial painters, long-term elimination half-times were estimated to be 9 years (Wenger and Soucas 1975). Estimates of the long-term elimination half-times of strontium reflect primarily the storage and release of strontium in bone.…”