Film packs at specified locations in the foxholes produced exposure readings such that the following conclusions could be drawn: (1) a two-man foxhole located 1,000 yd or more from ground zero affords good protection against gamma radiation emitted during the detonation 2,000 ft above ground of an approximate 2O KF atomic bomb, the exposure being less than 224r at a 32-inch depth. (2) A one-man foxhole affords better protection against gamma radiation than does a prone shelter or a two-man foxhole, maximum protection being found at the side of the foxhole nearest the burst. . 3 ee eee y CRLIR ~ 38 ra ~ CLOTHING DECONTAMINATION STUDIES AT DUGWAY PROVING GROUND. John A. Pierce, Jr., Robert P, Beckelheimer, and Frank 8S. Badger, 20 February 1952. CONFIDENTIAL Tests were undertaken to determine contaminability and decontaminability characteristics of military fabrics with respect to various RW contaminants. Eight different RW munitions were set up at 100-yd intervals, with the fabrics and clothing to be tested located in regular patterns dcewnwind from the line of munitions. Test pieces were exposed horizontally at a distance of 25 yd from each munition, and perpendicularly at a distance of 45 yd. These tests revealed that the working of the material (folds, seams, etc.) is a significant contamination factor, while the nature of the fabric appears to be the critical decontamination factor. HBT and wool uniforms have better contaminability and decontaminability characteristics than sateen uniforms. When made up into bags of like size, rayon, nylon, and wool exhibit characteristics superior to sateen and HBT. CRLIR - 49 Formula [7 satisfactorily decortaminated all samples. - FEASIBILITY STUDY OF SOLUBLE FILMS IN DECONTAMINATION OF STRUCTURES. Ralph E. Rexroad, June 1951. CONFIDENTIAL-RESTRICTED DATA Typical building-material surfaces were coated with certain protective films and then contaminated with a solution of mixed fission products. These films, though soluble in alkaline solutions, are insoluble in water, a property which makes them suitable for use on surfaces exposed to rain. - in) contaminated, coated surfaces were subjected to low- pressure (5 1b/sq in) hosing with an alkaline solution, this treatment washing toth film and contaminant from the various materials. REST! A ma