RADIOSENSITIVITY; *DROSOPHILA--*GENETIC RADIATION EFFECTS; *GENETIC RADIATION EFFECTS--*REVIEWS; *PLANT CELLS--*RADIOSENSITIVITY; *POPULATIONS BIOLOGICAL RADIATION EFFECTS; CHROMOSOMES; --*GENETIC RADIATION EFFECTS; POPULATIONS; IONIZING RADIATIONS; HUMAN GENETICS; CHRONIC IRRADIATION; MOLECULAR WEIGHT; NUCLEIC ACIDS; PLOIDY Life Sciences--Radiation Effects pn Animals Subject Codes (NSA): N48510* --Man; N48520 Life Sciences--Radiation Effects on Animals--Vertebrates; N48410 Life Sciences--Radiation Effects on Plants--Basic Studies; N48530 Life Sciences--Radiation Effects on Animals--~Invertebrates 10/5/50 (Item 50 from file: 109) 848468 NSA-29-013005 Exposure rate reduction on Bikini Island due to concrete dwellings McCraw, T.F.; Lynch, O.D.T. Jr. USAEC Nevada Operations Office, Las Vegas. Radiological Operations Div. Corp. Source Code: 9500450 Publication Date: Jun 1973 8 p. Primary Report No.: WASH--1273 Journal Announcement: NSA29 Availability: NTIS $4.00. Document Type: Report Language: English Subfile: NSA (Nuclear Science Abstracts) Work Location: United States During the May 1972 AEC sponsored resurvey of Bikini Atoll Measurements were made to determine the reduction of gamma exposure rates at dwelling sites due to the shielding effect of the concrete structures being erected for occupancy by the returning Bikini people. Exposure rates were measured at several points around and within each dwelling. Results showed that exposure rates present from radioactivity remaining post nuclear testing are reduced within the concrete dwellings by a significant amount. Upon completion of the housing construction effont, an exposure reduction factor of about 50% may apply. This is about what was expected provided materials of construction contained low levels of radioactivity. Even greater reduction can be expected when the housing area is covered with one to two inches of coral gravel as has been recommended. Depending on the occupancy time for residents of these houses, total exposure to external radiation can be expected to be reduced accordingly. External exposure rates measured ranged from 7 to 55 mu R/hr, with an arithmetic mean value of 20 mu R/hr. (CH) Descriptors: *BIKINI--*RADIATION DOSES; *BUILDING MATERIALS-—-*RADIATION PROTECTION; *HUMAN POPULATIONS--*RADIATION DOSES; BUILDINGS; CONCRETES; DOSE RATES; EARTH CRUST; ENVIRONMENT; EXTERNAL IRRADIATION; FALLOUT DEPOSITS; GAMMA SOURCES; NUCLEAR EXPLOSIONS; RADIOACTIVITY; SHIELDING MATERIALS; TIME DEPENDENCE Subject Codes (NSA): N48510* Life Sciences--Radiation Effects on Animals --Man; N72400 Physics Experiments 10/5/51 843548 (Radiation & Shielding) --Shielding Calculations & - (Item 51 from file: NSA-29-008069 109) Subfile: NSA 9083531 Cancer induction in man from internal radioactivity Mays, C.W. Univ. of Utah, Salt Lake City Health Phys., v. 25, no. 6, pp. 585-592 Publication Date: Dec 1973 Coden: HLTPA Journal Announcement: NSA29 Document Type: Journal Article Language: English (Nuclear Science Abstracts) Work Location: United States The indicated malignancies have been induced in exposed persons by the following radionuclides and their decay products~- /sup 222/Rnuranium miners -~- lung carcinomas; /sup 226/Ra-- dial painters --bone sarcomas and sinus carcinomas; /sup 232/Th-- thorotrast cases -- liver cancers; /sup 224/Ra-