The Lyner Complex (renamed"U1a") is a mined underground complex in Area 1 that is available for dynamic experiments (including subcritical
experiments involving special nuclear material) and hydrodynamic tests that cannot be conducted aboveground because they may disperse hazardous
materials. Initial work on what is now known as the Lyner Complex began in the late 1960s with the mining of the U1a shaft to a depth of 305 meters
(m) (1,000 feet [ft]) for a nuclear test. It was not used.
Additional work took place in the 1980s and early 1990s to develop a complex that could be used to perform intentionally designed low-yield tests or
experiments, which included safety tests, and other experiments that would be expected to remain subcritical or produce negligible nuclear energy
release.
The Ledoux nuclear test with a yield of less than 25 kilotons was conducted in 1990 in a drift within this tunnel complex.
The Kismet experiment, involving high explosives, tritium, depleted uranium, and other materials, was a dynamic experiment conducted in the Lyner
Complex in March 1995. Both Ledoux and Kismet were contained to prevent radiological releases to the rest of the Lyner Complex and the surface
environment.
The "U1a" mined underground complex, continues to be available for additional dynamic experiments (including subcritical experiments involving
special nuclear material) and hydrodynamic tests that now cannot be conducted atmospherically because they may disperse hazardous materials.
Whether to be conducted withing Area 1, or elsewhere at the NTS, those hydrodynamic tests being planned by DOE for the 1996-2005 time period will be
integrated systems tests of mock-up nuclear packages during which the conventional high explosive (HE) portion is detonated and the resulting motions
and reactions of materials and components are measured. These hydrodynamic tests (perhaps totaling over 1000) will be used to obtain diagnostic
information on the behavior of a nuclear weapons primary assembly using simulated materials, such as depleted uranium, in place of the fissile
material in an actual weapon, and to evaluate the effects of aging on nuclear remaining in the nation's arsenal.
www.shundahai.org...
This is just some of the things they have done there. Since it supposedly is "not is use", god only knows what they are really doing down
there...
Mr. M