Contract No.: AT(45-1)-540 A survey of the radioactivity in the sea in the region of the North Equatorial Current from the Marshall Islands to the Marianas Islands was made in September 1956. Plankton samples were taken by oblique tows from 200 meters and water samples were taken from the surface, pattern of distribution of radioactivity shows a sharp decrease east of Bikimi and a gradual but irregular decrease west of Eniwetok. A slight degree of cortamination is indicated as far to the west as Guam, the western extremity of the survey. Non-fission products account for a large proportion of the radioactivity in plankton and fish samples. (auth) Descriptors: ALGAE; CONTAMINATION; DISTRIBUTION; ENVIRONMENT; FISH; FISSION PRODUCTS; MICROORGANISMS; RADIOACTIVITY; SAMPLING; SEA; SURFACES; WATER Subject Codes (NSA): BIOLOGY AND MEDICINE 10/5/243 (Item 243 from file: 075522 NSA-12-000018 109) A RADIOLOGICAL STUDY OF RONGELAP ATOLL, MARSHALL ISLANDS, 1954-1955 Washington. Univ., Seattle. Applied Fisheries Lab. Publication Date: Aug. 15, 1955 75 p. Primary Report No.: UWFL-42 Journal Announcement: NSA12 Availability: NTIS Document Type: Language: DURING Report English Contract No.: AT(45-1)540 Descriptor Groups (Splits): ALGAE--ANIMALS~-BIOLOGY--BIRDS-~- CONTAMINATION--DISTRIBUTION--ENVIRONMENT --FALLOUT--FISH--INVERTEBRATES -~ MEASURED VALUES--MICROORGANISMS--NUCLEAR EXPLOSIONS--PLANKTON--PLANTS-RADIOACTIVITY --RADIOGRAPHY --SAMPLING--SOILS--WATER ALGAE --BIRDS--COCONUTS - -ENVIRONMENT- -FALLOUT--FISH--FOOD--FRUIT--LIVER-MAN--MARSHALL ISLANDS--MEAT--NUCLEAR EXPLOSIONS--POPULATIONS--RADIATION DOSES--ROOTS--TISSUES Subject Codes (NSA): BIOLOGY AND MEDICINE 10/5/244 (Item 244 from file: 075518 NSA-12-000014 109) STUDIES ON LARGE AREA SUB-FABRIC BURNS Berkley, K.M.; Pearse, H.E. Rochester, N.Y. Univ. Atomic Energy Project Publication Date: July 5, 1957 19 p. Primary Report No.: UR-494 Journal Announcement: NSA12 Availability: NTIS Document Type: Report Language: English ™- Contract No.: W-7401-ENG-49 The detonation of shot one at Bikini Atoll on March 1, 1954, produced a fallout of radioactive ash upon Rongelap Atoll, Marshall Islands. The distribution of the radioactive ash on the islands and in the plants and animals of the area has been studied and evaluated. During the first expedition to Rongelap Atoll on March 26, 1954, biological samples were collected and measurements made of the radiation contamination. On three ca ro 2 ey additional expeditions extensive collections of material were made for this study, the last on January 25-30, 1955. The decline in radioactivity was e« measured in 1499 samples of fish, invertebrates, land plants, algae, birdsyr plankton, soil, and water from the Rongelap area. During this study particular emphasis was placed upon evaluation of the radioactivity in food used by the natives. Coconut milk collected on March 26, 1954, contained 1.03 microcuries per kilogram of wet tissue while the coconut meat had 1.16 mu c/kg. By January 25-30, 1955, the level in coconut milk had declined to 0.041 mu c/kg and the meat to 0.036 mu c/kg. Fish muscle on March 26, 1954, averaged 2.74 mu c/kg and fish liver 204.0 mu c/kg. The decline to January 25-30 was 0.10 mu c/kg for the muscle and 3.52 mu c/kg for the