End Resource) for each nuclear test as well as studies of the seismic effects, temperature, radiation, and geological and physical effects of nuclear blasts. Radicactive samples from NTS were usually sent to the Radiochemistry Laboratory in Livermore. The LRL Earth Science Group assisted in selecting sites, sampling, determining depths, interpreting gamma logs, selecting sampling techniques, geological mapping of excavations, and determining radioactive samples to be sent to Radiochemistry. (These included samples from Hardhat, Danny Boy, and Sedan, the first nuclear cratering under AEC Plowshare). fast burst LRL-Nevada also constructed and tested "Fran," a reactor used for irradiating special samples at NTS. In the mid-1960s, the Laboratory Field Operations conducted several underground test series at NTS. The Chemistry Department developed an air-launch rocket sampling system to obtain samples of radioactive debris. The L Division developed rocket-carried instrument packages for device diagnostics. In conjunction with Sandia Corporation, the Division created booster and recovery systems. In the late 1950s and in the 1960s, the Test Division focused on the underground nuclear explosions for military use. A particular challenge in the test emerged in the recovery of test devices which measured phenomena in the presence of high radiation backgrounds. In 1963, the Storax series of underground nuclear tests were made at NTS. LRL also designed and executed projects Schooner and Dribble salt dome shots. By the mid-1960s, the LRL-Nevada Group averaged 250 people. They participated in Niblick and Whetstone weapons series, K Division Plowshare programs at NTS, Project Pluto Tory reactor series assembly, test, and removal; off-site technical and administrative support of projects; and the Airborne Diagnostics Pro- gram. Engineering and Construction participated in construction of radioactive containment. The group also supervised deactivation of the area 401 Tory II-C reactor facility, constructed a mechanical and technical shop, the Super Kukla, and other facilities at NTS. In 1965, the Nevada Test Division moved into the "Blue Building" at Mercury which housed the Health Physics Laboratory, Photo Laboratory, Electronics and Mechanical Shops, and an IBM computer. Both Physics and Earth Science at Nevada operated the Super Kukla and Fran reactors to test performance and measure effects. They also supported Weapons and Plowshare programs in the study of shock, geological and physical properties, and collected radiation samples. The Geophysics Section used diagnostic trailer for preshot seismic exploration and ground-motion studies from the shot, and airborne radioactivity tests. Electronics Engineering supported reaction history data acquisition, and

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