This article was produced in partnership with The Santa Fe New Mexican, which is a member of the ProPublica Local Reporting Network.

The Trump administration has quietly taken steps that may inhibit independent oversight of its most high-risk nuclear facilities, including some buildings at Los Alamos National Laboratory, a Department of Energy document shows.

An order published on the department’s website in mid-May outlines new limits on the Defense Nuclear Facilities Safety Board — including preventing the board from accessing sensitive information, imposing additional legal hurdles on board staff, and mandating that Energy Department officials speak “with one voice” when communicating with the board.

The board has, by statute, operated independently and has been provided largely unfettered access to the nation’s nuclear weapons complexes in order to assess accidents or safety concerns that could pose a grave risk to workers and the public. The main exception has been access to the nuclear weapons themselves.

For many years, the board asked the Department of Energy to provide annual reviews of how well facilities handled nuclear materials vulnerable to a runaway chain reaction — and required federal officials to brief the board on the findings. It also has urged the energy secretary not to restart certain nuclear operations at various sites until work could be done safely.

At Los Alamos, the board has conducted ongoing reviews of the plutonium facility, holding hearings in Santa Fe and in recent years identifying imminent and “major deficiencies” in the building that could put the public at risk in the event of an earthquake. The lab sits on an active and complex geological fault system capable of causing a high magnitude quake.

The Energy Department’s order is the latest effort to limit transparency and weaken the board’s ability to conduct oversight, experts and critics say. And it represents another step by the Trump administration to stall or halt the work done by advisory boards and committees across the federal government, including a scientific advisory board at the Environmental Protection Agency and several of the Department of Labor’s advisory committees established to protect worker safety and health.

“This administration is very regressive,” said Robert Alvarez, who helped draft the legislation that created the board in the 1980s as a senate staff expert for Sen. John Glenn, D-Ohio, and subsequently served as senior policy adviser for former Energy Secretary Bill Richardson. “We shouldn’t have to wait for something to blow up or catch fire in order to pay attention to a safety problem.”

The Department of Energy did not respond to multiple requests for comment, but said in a presentation that the order will increase efficiency and decrease costs. “This order does not hinder cooperation with the board or to prevent them from accomplishing their safety oversight responsibilities,” the presentation said. A spokesman for the safety board also declined comment on the order, saying it was in the Energy Department’s purview. The spokesman said the board and staff are waiting to see how it “shakes out.”

The five-member board was formed in 1988 near the close of the Cold War, as the public and Congress began to question the lack of accountability at the Department of Energy and its predecessor agencies, which since the end of the Manhattan Project had made their own rules and been entirely self-regulating. At the time, there were reports of widespread radiological contamination at the Rocky Flats Plant in Colorado and problems at other nuclear facilities. The board’s formation also came on the heels of the Chernobyl nuclear disaster.

Chernobyl, Alvarez said, showed the lax conditions in which nuclear power and materials were being manufactured both in the then-Soviet Union and the United States, and the calamity that could arise from an accident. The board was born out of that understanding, and now relies on a staff of more than 100, several of whom are stationed at lab sites. These staffers create weekly one-page reports that outline mishaps and near-misses and help inform larger recommendations.

The board does not have regulatory power, but for the first two decades of its life, all of its recommendations were adopted by the energy secretary.

Now, Alvarez said, the Department of Energy is trying to “isolate and fence off” the board’s access, part of a “constant effort to chip away at the ability of the board to do oversight.”

Sen. Tom Udall, D-N.M., said in an email that the board is integral to New Mexico’s weapons labs. The board also oversees facilities in California, Washington state, South Carolina and other states.

“We have seen too many serious safety and security lapses at DOE nuclear sites to accept any attempts to weaken” the board, Udall said, adding that he wants to preserve the board’s “critical role as an independent watchdog for public health and safety.”

He said he will be asking the Department of Energy for a “full account” of how the changes will affect worker safety and public health.