Operation Latchkey: on-site radiological safety report, July 1966--June 1967

LATCHKEY was the name assigned to the series of underground nuclear experiments conducted at the Nevada Test Site from July 1, 1966, to June 30, 1967. Remote radiation measurements were taken during and after each nuclear experiment by a telemetry system. Monitors with portable radiation detection instruments surveyed reentry routes into ground zeroes before other planned entries were made. Continuous surveillance was provided while persons were in radiation areas and appropriate precautions were taken to protect personnel from unnecessary exposure to radiation. Protective clothing and equipment were issued as needed. Complete radiological safety and industrial hygiene coverage was provided during drilling and mining operations. Telemetered and portable radiation detector measurements are listed. Detection instrumentation used is described and specific operational procedures are defined. Detailed environmental sciences information including event description, radiological survey and air sample health data, bioassay results and telemetry measurements for each event in this series is contained in the REECo Health Data Reports located on file with the Energy Research and Development Administration, Nevada Operations Office