U.S. Atomic Energy Commission, Albuquerque, N. Mex. Health Physics (England) v 2. Publication Date: (1960) Feb. 256-60 p. wert Coden: HLTPA Note: 0017-9078 Journal Announcement: NSA14 Document Type: Journal Article Language: English Health physics in the support of field operations at the Nevada Test Site and Eniwetok Proving Ground is briefly discussed. At the test sites, the terms radiological safety and health physics are used interchangeably. Radiological safety requirements necessary to control radiation exposure of all participating personnel at both sites are presented. The organizational setup for health physics support services and assignment of respnnsibilities for control of radiation exposure to personnel are discussed. The necessary supporting rad-safety functions such as training of monitors, use of aircraft and instrumentation, are included. (auth). Descriptors: AIRCRAFT; CONTROL; MONITORING; NEVADA TEST SITE; PERSONNEL ; RADIATION DETECTORS; RADIATION DOSES; RADIATION PROTECTION; SAFETY Subject Codes (NSA): HEALTH AND SAFETY INCLUDING DOSIMETRY 10/5/200 126127 (Item 200 from file: NSA-14-009667 109) RADIOCHEMICAL ANALYSIS OF INDIVIDUAL FALLOUT PARTICLES Mackin, J.L.; Zigman, P.E.; Love, D.L.; MacDonald, D.; Naval Radiological Defense Lab., San Francisco Publication Date: Sept. 17, 1958 46 p. Primary Report No.: USNRDL-TR-386 Journal Announcement: NSA14 Document Type: Report Sam, D. Language: English Quantitative measurements were made of the radioactivity of individual fall-out particles from a nuclear detonation at the Eniwetok Proving Grounds. These measurements were possible since individual particles which represented approximately 10/sup 10/ or more fissions were obtained. Although several types of particles were observed, the data were generally resolved as being derived from two major particle classes depending upon whether the coral had undergone an obvious physical alteration such as melting. A number of individual particles was radiochemically analyzed for the nucleides Mo/sup 99/, Ba/sup 140/-La/sup 140/, Sr/sup 89/, and N/sup 239/ The data obtained, together with gamma spectral and decay measurements, indicate that fractionation of radionuclides was prominent in the fall-out particles. Measured R values for Ba/sup 140/ and Sr/sup 89/ based on Mo/sup 99/ were over an order of magnitude lower in the altered particles than in the more normal-appearing or unaltered particles. The fissions/gram values of altered particles averaged 100 times that of unaltered particles. Gamma decay curves of the two classes of particles taken from H + 50 to H + 10,000 hr showed marked disslmilarities.~ In addition to the established feasibility of the individual particle measurements it is postulated that the radioactive composition of fall-out at any point may be detemnined by the relative numbers of the two major classes of particles observed. (auth) Descriptors: BARIUM 140; DECAY; DIAGRAMS; FALLOUT; GAMMA SPECTROMETERS; LANTHANUM 140; MEASURED VALUES; MELTING; MOLYBDENUM 99; NEPTUNIUM 239; NUCLEAR EXPLOSIONS; PARTICLES; QUALITATIVE ANALYSIS; QUANTITATIVE ANALYSIS; RADIOACTIVITY; RADIOCHEMISTRY; SOILS; STRONTIUM 89 Subject Codes (NSA): HEALTH AND SAFETY INCLUDING DOSIMETRY 10/5/201 125762 (Item 201 from file: NSA-14-009302 109) FALLOUT IN THE OCEANS. "Fallout from Nuclear Weapons Tests. Hearings Before the Special Subcommittee on Radiation of the Joint Committee on Atomic Energy, Congress of the United States, Eighty-Sixth Congress, First Session on Fallout from Nuclear Weapons Tests, Volume 3" Seymour, A. 5 0 0 3 5 q l May 5,6,7, and 8, 1959.