NUCLEAR BAPLOSLUND; Subject Categories: Weaponry -- 10/5/5113 01877591 KANGE 450202* (-1989) (Item 213 PINDEKS -- Explosions & Explosives -- Nuclear -- from file: 103) BRA-12-005118; EDB-87-005224 Author(s): Pickering, J.E.; Culver, W.T.; Allen, R.G.; Benson, R.E.; Morris, F.M. Title: Operation Hardtack. Project 4.1. Effects on eyes from exposure to very-high-altitude bursts Corporate Source: School of Aviation Medicine, Randolph AFB, TX (USA) Publication Date: 1 Sep 1985 p 57 Report Number(s): AD-A-995387/8/XAB Document Type: Report Language: English Journal Announcement: EDB8611 Availability: NTIS, PC A0O4/MF AOl. Subfile: ERA (Energy Research Abstracts). GRA (NTIS NTS) Country of Origin: United States Country of Pubasication: United States Abstract: The primary objective of this project was to determine the extent of chorioretinal damage caused by exposure to very-high-altitude, high-yield nuclear detonations at distances of 50 to 350 nautical miles from burst point and to relate experimental data to theoretical calculations. A correlated objective was to estimate, from the data derived from these experiments, distance limits beyond which retinal burns were not expected to occur from nuclear detonations at these altitudes. From these data, it is concluded that all retinal burns occurring within 160 nautical miles would produce a permanent scotoma in the human. Macular involvement especially would reduce visual acuity to a critical level. Major Descriptors: *HARDTACK PROJECT; *NUCLEAR EXPLOSIONS -~- BIOLOGICAL RADIATION EFFECTS; *RETINA -- RADIATION BURNS Descriptors: ATMOSPHERIC EXPLOSIONS; DAMAGE; DATA PROCESSING; YIELD STRENGTH Broader Terms: BIOLOGICAL EFFECTS; BIOLOGICAL RADIATION EFFECTS; BODY; BODY AREAS; BURNS; EXPLOSIONS; EYES; FACE; HEAD; INJURIES; LOCAL RADIATION EFFECTS; MECHANICAL PROPERTIES; NUCLEAR EXPLOSIONS; ORGANS; PROCESSING; RADIATION EFFECTS; RADIATION INJURIES; SENSE ORGANS Subject Categories: Weaponry -- 10/5/514 01877590 Author(s): 450202* (-1989) -- Explosions & Explosives -- Nuclear -- (Item 214 from file: 103) ERA-12-005117; EDB-87-005223 LeDoux, J.C.; Rush, P.J. Title: Operation Hardtack. Project 3.2. Response of earth-confined flexible~arch structures in high-overpressure regions Corporate Source: Naval Civil Engineering Lab., Port Hueneme, CA Publication Date: 1 Sep 1985 p 158 Report Number(s): (USA) AD-A-995386/0/XAB Document Type: Report Language: English Journal Announcement: EDB8611 Availability: NTIS, PC AQ8/MF AOl. Subfile: ERA (Energy Research Abstracts). Country of Origin: United States GRA (NTIS NTS) Country of Publication: United States Abstract: The purpose of this project was to determine structural responses and failure criteria of earth-confined corrugated-steel flexible arches subjected to high overpressure blast loading from nuclear detonations. A flexible.arch is considered as an arch structure whose ultimate supporting!capacity is dependent upon confinement within a surrounding earth configuration. A collateral objective was to determine the radiation-shielding effectiveness of such structures with a minimum cover of five feet of coral sand. Because the soil and ground-water 9033794