TWEED MP Geoff Provest has supported legislation changes that allow uranium exploration across the state but maintains he is still firmly against any form of mining on the Tweed.

The policy changes follow a request from the federal government for NSW and Victoria to review their prohibition on uranium exploration.

South Australia, Western Australia and the Northern Territory have profitable uranium exploration and mining industries that make Australia the world's third largest exporter of uranium.

Mr Provest said allowing exploration was simply to find out what was in the ground and whether it was a viable resource for the state to capitalise on.

State Labor MP Walt Secord raised his fears in parliament this week that the legislation opened the door to uranium mining throughout the Clarence Moreton Basin on the north coast, potentially contaminating the environment and risking the health of communities in the Tweed.

"In 1986, in a spirit of bipartisanship, the NSW parliament agreed that the potential release of toxic elements could contaminate large areas of land and pollute our rivers," Mr Secord said.

"They knew then, as Labor knows now, that there is still no failsafe way to transport and manage nuclear waste.

"Make no mistake, the government's decision to allow uranium exploration is a huge betrayal."

Outside of parliament, Mr Provest has dismissed Mr Secord's comments as "fear-mongering."

"I dismiss those comments completely," Mr Provest said.

"It's not mining, it's exploration and the last briefing I had was that they were looking at an area south west of Broken Hill.

"I will always be against any form of mining on the north coast, this is simply to give us an idea of what is in the ground."