Pluto The Program Pluto tests facilities included three areas: Hot Box, at Site 401, Blow Pipe, at Mercury, and Tory II A. Nevada, , The facilities group included operations for control and maintenance of the reactor, the test bunker where the test was per- formed two miles from the control point, the disassembly building where the reactor was dismantled after a run and environmental effects were observed. The Facilities group maintained all power systems. The Controls Group designed electronic controls, per- formed environmental tests on equipment. specified equipment. instruments to be used, The Instrument Group and evaluated and selected Whitney Project The Whitney program ws concerned with the design of nuclear explosives for national defense. the investigation of basic their effects. Weapons design research included processes of nuclear explosions and LRL-Nevada The Nevada Test organization of Lawrence Radiation Laboratory grew from 18 to 43 (in 1959) to 161 (1961) and, in 1962, 233 per- mament employees. The Nevada group was largely directed to the Pluto projects. These included the facilities and testing of the Tory IIA-1 reactor, devising a perimeter radiation monitoring system, and remote handling equipment. Personnel expansion in 1959 was in support of Hardtack II and the development of diagnostic equipment for underground tests after the moratorium. The Nevada organization provided support for projects carried on at NTS such as Hobo, Buckboard, and In 1962, Lollipop, Stagecoach. Stardust, Tattoo, Rowboat, Scooter, the Nevada operations group supported the Labora- tory’s portion of the Nougat Operation. The Earth Science Group made measurements of underground shot phenomena as temperature, radiation, geological and physical properties. The TV camera sys- tem was modified to take pictures of the Gnome activity. Nevada Operations sampled and conducted measurements, mapped, and inter-~preted core samples of the Hardtack Neptune event, and developed a complete time and remote-area radiation detection, monitor display and recording system. The suspension in October 1958 of all further nuclear testing for an indefinite time altered the immediate outcome of the experimental work of time, the Nevada Physics division. At the same the development of nuclear weapon designs during the mora- torium continued. At the NTS, the Physics Group made diagnostic assessments of underground shots, including seismic effects, tem- perature, radiation measurements, and geological and physical effects of nuclear blasts. The Physics Group also calibrated and operated the Slifer System (Shortened Line Indicated Frequency

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