Author(s): Source: Hisamatsu, Health Phys. S. (Akita Univ. (United Kingdom) (Japan)); Publication Date: Aug 1978 p 301-307 Document Type: Journal Article Language: English Journal Announcement: EDB790 Subfile: AIX v 35:2. Sakanoue, Coden: M. HLTPA TS?A . (non-US Atomindex input). Country of Origin: Japan Abstract: The concentrations of /sup 239 +240/Pu and /sup 241/Am in the debris from the second thermonuclear test detonation of the USA (Bravo) were determined. This debris, called Bikini Ash, was collected in 1954 on the deck of the Japanese fisherboat ’5th Fukuryu-Maru’ which was located some 150 km to the east of Bikini Atoll at the time of the thermonuclear test. A portion of the 1954 sample was subjected to radiochemical analysis in 1974. The concentrations of /sup 239 +/ /sup 240/Pu and /sup 241/Am in th sample were determined to be 25.9 + - 1.7 and 12.9 + - 0.9 dis/min/mg, respectively. From these values, the ratio of /sup 241/Pu//sup 239 +240/Pu at time zero was calculated to be 26 + - 3, and this ratio was almost the same as in the Mike thermonuclear debris. The /sup 239 +240/Pu and /sup 241/am contents of the marine sediment samples collected near Bikini Atoll were also analyzed, anda significant contamination with these nuclides was found to be still remaining in this area.; Major Descriptors: *AMERICIUM 241 -- RADIATION MONITORING; *PLUTONIUM 239 -- RADIATION MONITORING; *PLUTONIUM 240 -- RADIATION MONITORING; *PLUTONIUM 241 -- RADIATION MONITORING; *SEDIMENTS -- RADIOACTIVITY; *THERMONUCLEAR EXPLOSIONS -- FALLOUT DEPOSITS Descriptors: BIKINI; JAPAN; NUCLEAR WEAPONS; SEA BED; SHIPS Broader Terms: ACTINIDE ISOTOPES; ACTINIDE NUCLEI; ALPHA DECAY RADIOISOTOPES; AMERICIUM ISOTOPES; ASIA; BETA DECAY RADIOISOTOPES; BETA-MINUS DECAY RADIOISOTOPES; EVEN-EVEN NUCLEI; EVEN-ODD NUCLEI; EXPLOSIONS; FALLOUT; HEAVY NUCLEI; ISLANDS; ISOTOPES; MARSHALL ISLANDS; MICRONESIA; MONITORING; NUCLEAR EXPLOSIONS; NUCLEI; OCEANIA; ODD-EVEN NUCLEI; PLUTONIUM ISOTOPES; RADIOISOTOPES; WEAPONS; YEARS LIVING RADIOISOTOPES Subject Categories: 500300* -- Environment, Atmospheric -- Radioactive Materials Monitoring & Transport -- (-1989) -- Environment, Aquatic -~ Radioactive Materials Monitoring & Transport -- (1989) 450202 -- Explosions & Explosives -- Nuclear -~ Weaponry -INIS Subject Categories: B31* -- Land 10/5/925 00546675 Author(s): {Item 625 from file: ERA-04-055602; Greenhouse, 103) INS-79-020166; EDB-79-126141 N.A.; Miltenberger, R.P.; Lessard, Title: External exposure measurements at Bikini Atoll Corporate Source: Brookhaven National Lab., Upton, NY Publication Date: Jan 1979 p 27 Report Number(s): BNL-51003 Contract Number (DOE): (-1989) E.T. (USA) EY-76-C-02-0016 Document Type: Report; Numerical data Language: English Journal Announcement: EDB7910 Availability: Dep. NTIS, PC A03/MF AOl. Subfile: INS (Technical (US Atomindex input); Information Center). Country of Origin: ERA (Energy Research Abstracts); TIC United States Country of Publication: United States Abstract: External exposure rate surveys from 1975 to 1977 on the islands Nam, Eneu and Bikini of Bikini Atoll gave average external exposure rates of 24, 5.7, and 32 ..mu..R/hr respectively. The exposure rate on Eneu Island is uniform, whereas those on Bikini and Nam range from 7.0 to 80. ..mu..R/hr. Based on an assumed living pattern at Bikini Island, the adult male Bikinian is estimated to be in the presence of an external radiation field corresponding to 16 ..mu..R/hr due to debris and fallout from the 1954 BRAVO incident. This corresponds to a 30 year 9OCuUQLO 520300