West Australian opposition leader Eric Ripper is warning his federal Labor counterparts they won't get any uranium from WA if he wins the next election.
Mr Ripper told Fairfax radio in Perth on Monday he did not support uranium mining for WA and would close existing mines.
"Stay away from uranium mining," Mr Ripper said.
"It's a contribution to a dirty and unsafe and dangerous global industry."
Mr Ripper's comments follow the ALP National Conference vote at the weekend to support Prime Minister Julia Gillard's plans to export uranium to India.
Earlier on Monday, The West Australian reported Mr Ripper as saying he would close down all WA uranium mining projects, however advanced, if he won the next election.
"It does not matter how advanced the projects are - I'm putting the industry on notice, you won't have your final approvals by the time of the next election and they will not be granted if WA Labor is elected," Mr Ripper said.
Premier Colin Barnett was quoted as saying that Mr Ripper's stance would pose a sovereign risk to investment in WA, as well as exposing the state to hundreds of millions of dollars in compensation claims from uranium miners if he stopped any projects.
Labor MP Ben Wyatt, a one-time challenger to Mr Ripper, was quoted as saying it would be unwise to close existing uranium projects.
The WA Chamber of Minerals and Energy (CME) urged the opposition party to change its anti-uranium stance.
The CME said state Labor's position undermined investment certainty, jobs and the economy.
"There should be no reason why Western Australia is not developing and selling uranium," the CME said in a statement.
More than $55 million has been spent on uranium exploration in WA since the ban was lifted, it said.
By the end of 2014, WA could have three uranium mines in operation.
Toro Energy aims to start uranium exports from its Wiluna project that year, as does BHP Billiton at its much larger Yeelirrie project, both in the Mid West.
Canada's Mega Uranium previously sought to bring its Lake Maitland project in the same region into production by late this year but postponed a feasibility study.
