Language: English Journal Announcement: Subfile: TIC EDB8103 (Technical Information Center). Country of Origin: United States Abstract: A study of the relative importance of the external, inhalation, and ingestion hazards associated with surface contamination of aircraft that have penetrated atomic clouds or the stratosphere is described. Experiments were conducted at Operations Redwing and Plumbbob. They included ..gamma..- and ..beta..-..gamma..-aircraft surveys, air sampling, swipe sampling, radiochemical and biological analyses, and personnel dosimetry. The latest maximum permissible total radiation dose limits and the NCRP total organ burdens are interpreted in terms of the aircraft maintenance problem. Curves are drawn to show the maximum permissible concentration of mixed fission products in air as a function of age of the debris assuming a 40-hr work week for both controlled and uncontrolled situations. Similar curves are given for the ingestion hazard. The radiological hazard from external radiation is compared with that presented by inhalation and ingestion. It is found for mixed fission debris on aircraft ranging in age from 1 hr to 1 year that the external radiation hazard is dominant by large factors under all normal working conditions. It is concluded that ..gamma..-surveying is generally adequate to define the radiation problem. Release to uncontrolled areas appears warranted if the average measured ..gamma..-field in potential working areas around the aircraft or its parts is less than 0.5 mr/hr regardless of age. Swipe sampling cannot be used to evaluate the local air concentration and thus the inhalation hazard. For mixed fission prodcts on aircraft surfaces swipe sampling is no more reliable than the close ..beta..-survey of the surface for estimating the potential ingestion hazard.; Major Descriptors: *AIRCRAFT -- RADIATION HAZARDS Descriptors: AERIAL MONITORING; AGE DEPENDENCE; AIR; BETA DETECTION; BODY BURDEN; EXTERNAL IRRADIATION; FISSION PRODUCTS; GAMMA DETECTION; INGESTION; INHALATION; MAXIMUM PERMISSIBLE DOSE; OCCUPATIONAL SAFETY; PERSONNEL; PERSONNEL DOSIMETRY; PLUMBBOB PROJECT; RADIATION MONITORING; RADIOACTIVE CLOUDS; RADIOCHEMICAL ANALYSIS; REDWING PROJECT; WORKING CONDITIONS Broader Terms: CHARGED PARTICLE DETECTION; CHEMICAL ANALYSIS; CLOUDS; DETECTION; DOSIMETRY; EXPLOSIONS; FLUIDS; GASES; HAZARDS; HEALTH HAZARDS; INTAKE; IRRADIATION; ISOTOPES; MATERIALS; MONITORING; NUCLEAR EXPLOSIONS; QUANTITATIVE CHEMICAL ANALYSIS; RADIATION DETECTION; RADIOACTIVE MATERIALS; SAFETY; SAFETY STANDARDS; STANDARDS Subject Categories: 500300* -- Environment, Atmospheric -- Radioactive Materials Monitoring & Transport -- (-1989) 560151 -- Radiation Effects on Animals -- Man 560161 -- Radionuclide Effects, Kinetics, & Toxicology -- Man 450200 -- Military Technology, Weaponry, & National Defense -- Nuclear Explosions & Explosives . (Item 533 from file: EDB-81-027898 103) Author(s): Telegadas, K.; Nagler, K.M. Title: Fallout patterns from Operation Hardtack, Phase II Corporate Source: Weather Bureau, Washington, DC (USA) Publication Date: Report Number(s): May 1960 TID-6055 p 124 900399] 10/5/833 00719645 Document Type: Report Language: English Journal Announcement: EDB8103 Availability: NTIS. Subfile: TIC (Technical Information Center). Country of Origin: United States Country of Publication: United States Abstract: Fall-out patterns from Operation Hardtack, Phas II, are presented for 31 of the 37 bursts. Those not being reported are Bursts Nos. 5, 16, 20, 23, 32, and 35. Dose-rate contours were drawn for the gamma dose rate one hour after burst time, and pertinent meteorological data