Last week's temporary restraining order issued by State District Judge Jon Wisser sided with environmentalists.
Wisser planned a hearing Monday on the injunction against the Texas Low-Level Radioactive Waste Disposal Compact Commission.
The commission on Tuesday was scheduled to vote on rules to expand how much waste could be processed at a dump in remote Andrews County.
Environmentalists, who sought last Thursday's court ruling, have accused regulators and Dallas-based Waste Control Specialists of rushing through the dump expansion proposal during the holidays. A company spokesman denies the allegations.
The site currently accepts waste from Texas, Vermont and the federal government.