AUSTRALIA is a long way off being able to equip its navy with nuclear submarines, US Ambassador Jeffrey Bleich says.
Some coalition frontbenchers are reported to have spoken to US officials about replacing the navy's diesel fleet with nuclear submarines.
The coalition members apparently keen on the strategy are not named in the reports by Fairfax Media.
Mr Bleich says the idea surfaces every now and again, but it's not on the table in the immediate future.
"It's an idea to speculate about, but it's so far away from being a serious policy consideration," he told Sky News on Sunday.
"Politically, there hasn't been a real momentum for development of a nuclear energy program at all, let alone nuclear submarines, in Australia."
Without the necessary expertise and infrastructure in place, it would be difficult to maintain a defence program involving nuclear subs, he said.
It was up to Australia, not the United States, to start any conversation about looking into alternative nuclear technologies.
But he said if Australia were to express interest in developing a nuclear program, the US would be open to dialogue.
US Defence Secretary Leon Panetta and Secretary of State Hillary Clinton will be in Perth this week for the annual Australia-US Ministerial (AUSMIN) talks.
That's us Jack. We screw our friends and arm our enemies. You know if it was up to most of us here we'd be sharing the best we've got with you guys. It's an embarrassment the way our government has treated Australia and the UK. Just more evidence that we are being controlled by international entities with an agenda of which most Americans are unaware. There almost seems to be an ethnic or even racial agenda to our policies. Asians of all breeds get first pick. Nations with anglo roots get the scraps.
"Is life so dear, or peace so sweet, as to be purchased at the price of chains and slavery? Forbid it, Almighty God! I know not what course others may take; but as for me, give me liberty, or give me death!"