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| Keywords: NTS - collapsed aluminum shelter.jpg One of two collapsed aluminum shelters in Frenchman Flat <br /> Ten concrete and two aluminum shelters and their blast doors were tested to withstand various blast forces The 50-feet diameter concrete domed shelters were two-feet thick still intact and six-inches thick partially collapsed The domes were subjected to 70 and 40 pounds per square inch of overpressure respectively The aluminum domes both crushed were 20 feet in diameter and one-inch and one-half-inch thick The shelters were designed and built by American Machine and Foundry Company for the national shelter program and were subjected to the Priscilla test Instrumentation was conducted by Ballistic Research Laboratories and the Armor Research Foundation Nevada Test Site Guide http //www nv energy gov/library/publications/historical/DOENV_715_Rev1 pdf DOE/NV-715 Federal Government of the United States PD-USGov Plumbbob Priscilla | ||||
