The Federal Opposition's resources spokesman David Johnston says the proposed Commonwealth nuclear waste facility will be a small-scale operation for low level waste and it will most probably be in the Northern Territory.

Resources Minister Martin Ferguson is expected to receive a report on four possible sites in the Northern Territory before the end of next month.

Mr Ferguson has refused several attempts by the ABC to talk about the Government's plans.

Opposition Senator David Johnston says he is in the dark about the report or when it will be finished, but says the territory is the only real option left.

"Thank the states for that. The states have disclosed no responsibility whatsoever," he said.

"They're happy to have the use of radioactive medicine, but when it comes to the disposing of the waste, they shirk their responsibilities.

"That's the reason it is in the Northern Territory - 'not in my backyard' is their catchcry."

Senator Johnston says Mr Ferguson is refusing to talk about a proposed nuclear waste facility because the ALP campaigned against the dump but has now realised that the site is a necessity.

"The fact is that his party made it a political issue and prior to the last election ran around, stirred the pot up and now of course the dawn of reality is that they need to have a repository for this waste," he said.

The Northern Land Council has confirmed that the Ngapa traditional owners of Muckaty Station would fully support a Commonwalth nuclear waste facility being built on their land.

The NLC says the Ngapa traditional owners nominated Muckaty - north of Tennant Creek - for consideration last year and are still pleased with the decision.

The NLC says an earlier report, saying that the owners had not decided on their stance about the proposed dump, was incorrect.

Mr Ferguson' office says the Government will keep its election promise to repeal legislation that would force a nuclear waste dump on the Northern Territory.