Huron King

The Huron King test chamber was used to simulate the vacuum of space



As part of Operation Tinderbox, on June 24, 1980, a small satellite prototype (DSCS III) was subjected to radioactivity from the "Huron King" shot in a vertical line-of-sight (VLOS) test undertaken in Area 3. This was a program to improve the database on nuclear hardening design techniques for defense satellites. The VLOS test configuration involved placing a nuclear device (less than 20 kilotons) at the bottom of a shaft. A communications satellite or other experiment was placed in a partially evacuated test chamber simulating a space environment. The test chamber was parked at ground level at the top of the shaft. At zero time, the radiation from the device shot up the vertical pipe to the surface test chamber. Mechanical closures then intercepted and sealed the pipe, preventing the explosive shock wave from damaging the targets. The test chamber was immediately disconnected by remote control from the pipe and quickly winched to safety before the ground could subside to form a crater. The Huron King test cost US$10.3 million in 1980 dollars.[18]

Last test



The final test at Yucca Flat (also the last test at the entire Nevada Test Site) was Operation Julin's "Divider" on September 23, 1992, just prior to the moratorium temporarily ending all nuclear testing. Divider was a safety experiment test shot that was detonated at the bottom of a shaft sunk into Area 3.