range in deep water from the Mike shot of Operation Ivy and (2) to attempt a correlation of these data with the basic problem of air-earth-water coupling of blast waves and possible effects to be expected on underwater ordnance. At the conclusion of the Mike shot, none of the instrumentation was recovered. Therefore no positive results are available. The following possible explanations of the loss of the instrumentation are-presented: from the Mike shot (1) The water column thrown up (assuming a 10-Mt yield over a free water surface) would have had a radius of 9160 ft. The accompanying inward motion of the water in the adjacent area would extend considerably farther out. The tuna can and may have gone up the spout. Discussions with authorities in this field have led the Project Officer to believe that this is the most plausible explanation for the loss of equipment. (2) The underwater pressures were so great at the ranges in question that the tuna cans were ruptured below the water line and sank. Ma‘jjor Descriptors: *IVY PROJECT -- UNDERWATER EXPLOSIONS; EXPLOSIONS -- PRESSURE EFFECTS *UNDERWATER Descriptors: TIME DEPENDENCE Broader Terms: EXPLOSIONS; NUCLEAR EXPLOSIONS Subject Categories: 450202* -- Explosions & Explosives -- Nuclear -Weaponry -- 10/5/636 01581163 (-1989) (Item 336 from file: EDB-85-087941 103) Author(s): Storm, E.; Bemis, B. Jr.; Malik, J.S. Title: Gamma radiation as a function of distance Corporate Source: Los Alamos Scientific Lab., Publication Date: Jul 1955 p 20 Report Number(s): AD-363577/8/XAB Note: Report on Operation Ivy, Project 5.1 (Prelim) (U). NM (USA) Supersedes Rept. No. WT-643 Document Type: Report Language: English Journal Announcement: ERA8505 Availability: NTIS, PC A0Q2/MF AOl. Subfile: ERA (Energy Research Abstracts). Country of Origin: United States Country of Publication: United States Abstract: Film measurements of gamma-ray exposure vs distance were made on beth Mike and King. The results show that gamma radiation from large-yield devices cannot be scaled directly from measurements of nominal-size devices, and that the effect of the shock wave and the cloud rise must be taken into consideration. For the 550-kt King shot, the gamma-ray exposures were about 1.5 to 1.7 times those expected by scaling directly from a nominal device. For the 10-Mt Mike sot, measured values were 30 to 80 times those expected from scaling. Major Descriptors: *GAMMA RADIATION -- RADIATION DOSES; SCALING LAWS; *IVY¥ PROJECT -- GAMMA RADIATION Descriptors: DISTANCE Broader Terms: DOSES; ELECTROMAGNETIC RADIATION; RADIATIONS; NUCLEAR EXPLOSIONS; RADIATIONS Subject Categories: Weaponry -- 10/5/637 450202* (-1983) EDB-85~-080106 Author(s): Cohen, EXPLOSIONS; IONIZING -- Explosions & Explosives -- Nuclear -- (Item 337 from file: 01573329 *GAMMA RADIATION -w 103) Title: Comparison of radionuclide concentrations in 1956 and 1973 Enewetak beach material N.; Rahon, T.H.; Hirshfield, Affiliation: New York Univ. Medical Center, Source: Health Phys. Publication Date: (United Kingdom) Feb 1985 Document Type: Journal Article p 228-230 Language: English Journal Announcement: EDBS505 Country of Origin: United States NY v 48:2. H. Coden: HLTPA