The federal agency responsible for overseeing and modernizing the U.S. nuclear stockpile will furlough the vast majority of its staff Monday as the government shutdown drags on, according to the Department of Energy.

About 1,400 employees at the National Nuclear Security Administration, or NNSA, will receive furlough notices Monday, while fewer than 400 employees will remain on the job to safeguard the stockpile, Energy Department spokesperson Ben Dietderich told CNN.

Energy Secretary Chris Wright will speak about the shutdown’s impact on the U.S.’ nuclear deterrent efforts Monday while visiting the Nevada National Security Site.

The NNSA Office of Secure Transportation, which oversees the transportation of nuclear weapons around the country, will be funded through Oct. 27.

“Since its

See Full Page