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The Big Science of stockpile stewardship

In the quarter century since the US last exploded a nuclear weapon, an extensive research enterprise has maintained the resources and know-how needed to preserve confidence in the country’s stockpile.

98 NUCLEAR DISARMAMENT, SAFEGUARDS, AND PHYSICAL P↗

Lab’s Z-machine efforts advance stockpile stewardship in multi-org collaboration

For the past 15 years, Los Alamos (LANL) employees have played a major role in plutonium experiments using the Z-machine — a device at Sandia National Laboratories (SNL) that uses high magnetic fields, electrical currents, and X-rays to help scientists understand how materials behave under extreme temperatures and pressures. High-energy density physics, or the study of matter under extreme conditions, is a key component of certifying the nation’s nuclear weapons stockpile.

11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS↗

Los Alamos Explosives Performance Key to Stockpile Stewardship

As the U.S. Nuclear Deterrent ages, one essential factor in making sure that the weapons will continue to perform as designed is understanding the fundamental properties of the high explosives that are part of a nuclear weapons system. As nuclear weapons go through life extension programs, some changes may be advantageous, particularly through the addition of what are known as "insensitive" high explosives that are much less likely to accidentally detonate than the already very safe "conventional" high explosives that are used in most weapons. At Los Alamos National Laboratory explosives research includes a wide variety of both large- and small-scale experiments that include small contained detonations, gas and powder gun firings, larger outdoor detonations, large-scale hydrodynamic tests, and at the Nevada Nuclear Security Site, underground sub-critical experiments.

42 ENGINEERING↗

Scorpius is being poised to make a sting in stockpile stewardship

Los Alamos is leading a federally directed charge to develop a new facility at the Nevada National Security Site. To study what happens to plutonium during the final stages of a nuclear weapon implosion, the plan calls for Scorpius, which will provide a radiographic capability in a lab 1,000 feet underground.

98 NUCLEAR DISARMAMENT, SAFEGUARDS, AND PHYSICAL P↗