what kind of war requires this kind of continuing investment?

AP | At Los Alamos National Laboratory, scientists and engineers refer to their planned new $6 billion nuclear lab by its clunky acronym, CMRR, short for Chemistry Metallurgy Research Replacement Facility. But as a work in progress for three decades and with hundreds of millions of dollars already spent, nomenclature is among the minor issues.

Questions continue to swirl about exactly what kind of nuclear and plutonium research will be done there, whether the lab is really necessary, and — perhaps most important — will it be safe, or could it become New Mexico's equivalent of Japan's Fukushima?

As federal officials prepare the final design plans for the controversial and very expensive lab, increased scrutiny is being placed on what in recent years has been discovered to be a greater potential for a major earthquake along the fault lines that have carved out the stunning gorges, canyons and valleys that surround the nation's premier nuclear weapons facility in northern New Mexico.

Final preparations for the lab — whose the high-end price tag estimate of $5.8 billion is almost $1 billion more than New Mexico's annual state budget and more than double the lab's annual budget — also comes as a cash-strapped Congress looks to trim defense spending and cut cleanup budgets at contaminated facilities like Los Alamos. It also comes as the inspector general recommends that the federal government consider consolidating its far-flung network of research labs.

Despite the uncertainty, the National Nuclear Safety Administration, an arm of the Department of Energy that oversees the nation's nuclear labs, is moving forward on final designs for the lab. Project director Herman Le-Doux says it has been redesigned with input from the nation's leading seismic experts, and the NNSA has "gone to great extremes" to ensure the planned building could withstand an earthquake of up to 7.3 magnitude.

Most seismic experts agree that would be a worst-case scenario for the area. But many people who live near the lab — and have seen it twice threatened by massive wildfires in 10 years — see no reason for taking the chance.

"The Department of Energy has learned nothing from the Fukushima disaster," said David McCoy, director of the environmental and nuclear watchdog group Citizens Action New Mexico, at a recent oversight hearing. That's become a common refrain since last year's earthquake and tsunami in Japan caused a meltdown at one of its nuclear plants. "The major lesson of Fukushima is ignored by NNSA: Don't build dangerous facilities in unsafe natural settings."

Lab officials say CMRR is needed to replace a 1940s era facility that is beyond renovation yet crucial to supporting its mission as the primary center for maintaining and developing the country's stockpile of nuclear weapons. While much of the work is classified, they insist the lab's mission is to do analytical work to support the nearby Plutonium Facility, or PF-4, which is the only building in the country equipped for making the pits that power nuclear weapons.

Watchdog groups, however, call it an effort by the DOE and NNSA to escalate the production of new nuclear weapons and turn what has largely been a research facility into a bomb factory.