560161 10/5/643 01552146 Author(s): Title: -- Radionuclide Effects, Kinetics, (Item 343 from file: 103) ERA-10-021614; EDB-85-058919 Fons, W.L.; Butler, C.P.; Bruce, Thermal effects on cellulosic materials Corporate Source: Publication Date: Report Number(s): Forest Service, & Toxicology -- Man 8.D. Washington, 12 Mar 1959 p 30 AD-465331/7/XAD DC ® (USA) . Note: Report on Operation Redwing-Project 8.2 Document Type: Report Language: English Journal Announcement: EDB8501 Availability: NTIS, PC AO03/MF AOl. Country of Origin: United States Country of Publication: United States Abstract: The project had as its primary objectives the determination of (1) the minimum thermal-ignition energies for fine kindling fuels and (2) the depth of char in wood as a check on equations developed from laboratory data obtained with a carbon arc. Test specimens of alpha-cellulose paper of various thicknesses, densities, and carbon contents; six common kindling fuels (cotton denim, rayon cloth, newspaper, pine needles, dry grass, and corrugated fiberboard); and three species of wood (maple, willow, balsa) were exposed to the radiation from Shot Cherokee at Sites Dog and George. The specimens were exposed to thermal radiation directly and, also, behind attenuating screens of different transmissions. For different moisture contents, part of the specimens were in containers vented to the atmosphere and part in moisture~-proof containers containing a desiccant. Because the bomb burst was not directly over planned target zero, the direct radiation from the entire fireball entered the cells at an appreciable angle, irradiating only a small portion of each specimen at Site George and missing the specimens entirely at Site Dog. For this reason, the depths of char of the wood specimens were without Significance. Data were obtained that permitted an estimate of the critical ignition energy for newspaper, pin needles, and ten of the black papers. Analysis of the black-paper data indicates that the minimum thermal energy causing ignition was increased by moisture content and density had more effect on the critical ignition energy of the thick papers than of the thin papers. Major Descriptors: *NUCLEAR EXPLOSIONS -- THERMAL RADIATION; *PAPER -RADIATION EFFECTS; *REDWING PROJECT -- THERMAL RADIATION; *TEXTILES RADIATION EFFECTS; *WOOD -- RADIATION EFFECTS Descriptors: COMBUSTION PRODUCTS; DAMAGE; IGNITION Broader Terms: ELECTROMAGNETIC RADIATION; EXPLOSIONS; RADIATIONS -- Subject Categories: 450202* -- Explosions & Explosives -- Nuclear -Weaponry -- (-1989) 360605 -~-- Materials -- Radiation Effects & 10/5/644 (Item 344 from file: 103) 01552145 ERA-10-021614; EBDB-85-058918 Title: Operation Crossroads. Report of the technical director, Corporate Source: Joint Task Force One, Washington, DC (USA) Volume Publication Date: May 1947 p 10 Report Number(s): AD-366583/3/XAD Note: See also Volume 2, AD-366 584 Document Type: Report Language: English Journal Announcement: EDB8501 Availability: NTIS, PC A02/MF AOl. Country of Origin: United States Country of Publication: United States Abstract: None Major Descriptors: *CROSSROADS PROJECT; WEAPONS -- TESTING Broader Terms: EXPLOSIONS; *NUCLEAR EXPLOSIONS; NUCLEAR EXPLOSIONS; WEAPONS *NUCLEAR I