Table 1.. Strontium-90 Production from United States Nuclear Weapons Test Operations Strontium-90 Production (kilocuriés) Less than Date? | Operation and Site 7/16/45 Trinity (New Mexico) - 8/8/45 Japanese Bombings 7/1/46 Crossroads (Bikini) 5/1/48 Sandstone (EPG) 2/1/51 Ranger (NTS) 5/1/51 Greenhouse (EPG) 11/1/51 Buster-Jangle (NTS) 5/1/52 Greater than 1 uTb Total 1.7 -- 1.7 3.5 -- 3.5 3.3 -- 3.3 12.9 - -- 12.9 1.2 ~- 4.2 52.0 -- 52.0 8.5 ~- 8.5 Tumbler-Snapper (NTS) 12.0 -- 12.0 5/1/53 Upshot-Knothole (NTS) 30.1 -- 30.1 11/1/52 Ivy u/1/sh Castle 4/1/55 ‘Teapot(NTS) 19.0 7/1/56 Redwing (EPG) fotar (EPG) ) x (EPG) Total (per cent) 1 wrb : 92.3 a as - 3721.9 on vs -- 19.0 we 85.8 862.0 978 oe 325.3 Wa9l.S 4816.8 “ 6.8 3629.5 oO 93.2 -- a. Where an operation consisted of more than one detonation, the date given is approximately the midpoint of the-series. b. Based on total fission plus fusior jield. c. EPG and NTR refer respectively to the Eniwetok Proving Grounds in the Marshall Islands and the continental Nevada Test Site. * Combined for declassification purposes.