@farmerman,
farmerman wrote:theyve never been able to show "at--point nuke reactors, Only these gigawatt units that represent environmental risks.
The GT-MHR design was completely risk free. If the graphite was ever exposed to the air it would have to burn for 100 hours before it released radioactive materials -- plenty of time to put out the fire.
The only reason why we don't have them today is because Bill Clinton de-funded them.
A similar design, the SC-HTGR, was selected by the Next Generation Nuclear Plant program. We'd be starting to build them today except Barack Obama de-funded the program.
I'm not completely sold on gas-cooled carbon-moderated designs because TRISO pellets are designed to be
unreprocessable for proliferation resistance. I just hate the idea of dumping valuable fuel as waste and then having to store the waste for millions of years. They claim to be able to get a high burnup rate with a single pass, but we'd still need to store the expended pellets in Yucca Mountain. But regardless, the only reason why we don't have 100% safe reactors today is because Democrats always cater to environmentalist wackos.
And actually China is about to come out with a line of pebble bed reactors. Personally I think the prismatic designs are better. A very strong earthquake can disrupt a pebble bed design whereas prismatic designs are earthquake proof. Plus pebble bed designs are limited to tiny reactors. With prismatic designs you can go a little bit larger. But China is about to start deploying them, so the world is about to see working examples of helium-cooled graphite-moderated reactors.
farmerman wrote:We have no high level waste repository,
Sure we do. Yucca Mountain.
But if we transition over to sodium-cooled reactors, we will not even
need a high-level waste repository.
And if Bill Clinton had not closed down all of the government's sodium-cooled reactors, we might actually be building them as power plants today.
Environmentalists are the problem here, not nuclear reactors.