The Northern Territory Chief Minister is increasing the political pressure on Country Liberal Party (CLP) Senator Nigel Scullion to cross the floor on the Commonwealth's nuclear waste dump legislation.

Deputy Chief Minister Syd Stirling will meet with Senator Scullion today in Canberra in a last ditch effort to make him cross the floor over the proposed development of a nuclear waste facility being built in the Territory.

The Territory's Chief Minister, Clare Martin, yesterday ruled out going to the courts to stop the Federal Government's plans to build the dump after being advised its legislation is watertight.

She has now turned all her attention on the vote of Senator Scullion.

"What's he there in Canberra to do if he's not to stand up for the Territory? Particularly as a Senator," Ms Martin said.

"That legislation can be knocked off if Nigel Scullion crosses the floor."

Mr Stirling also plans to meet with Family First Senator Stephen Fielding and the Nationals' Barnaby Joyce.

The Federal Government's radioactive waste bill is up for debate in the Senate this week.