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THE Nuclear Power Thread pt 9 (merged)

Discussions of conventional and alternative energy production technologies.

Re: THE Nuclear Power Thread pt 9 (merged)

Unread postby sparky » Mon 24 Aug 2020, 22:20:46

.during a presidential election year , until the nomination , all the rhetoric is to appeal to the hard core membership
those people are invested in the party and support policies which are often on the far side of the national consciousness

after the nomination , all the rhetoric is to appeal to the middle ,
those people are not enthused with partisan policies and somewhat skittish about militancy ,they want broad consensus
the hard core militants are kept at the back until election day , afterward they are completely ignored
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Re: THE Nuclear Power Thread pt 9 (merged)

Unread postby REAL Green » Fri 28 Aug 2020, 06:40:38

“Bill Gates' nuclear venture plans reactor to complement solar, wind power boom”
https://www.reuters.com/article/us-usa- ... SKBN25N2U8

“A nuclear energy venture founded by Bill Gates said Thursday it hopes to build small advanced nuclear power stations that can store electricity to supplement grids increasingly supplied by intermittent sources like solar and wind power…The 345-megawatt plants would be cooled by liquid sodium and cost about $1 billion each. Nuclear power is a top source of virtually emissions-free electricity, but many plants are shutting in the United States because of high costs and competition from solar and wind. Critics of advanced nuclear have also warned that smaller nuclear is even more expensive than conventional. The new plants, however, are designed to complement a renewable power because they will store the reactor power in tanks of molten salt during days when the grid is well supplied. The nuclear power could be used later when solar and wind power are low due to weather conditions. Molten salt power storage has been used at thermal solar plants in the past, but leaks have plagued some of the projects. Levesque said the Natrium design would provide more consistent temperatures than a solar plant, resulting in less wear and tear.”
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Re: THE Nuclear Power Thread pt 9 (merged)

Unread postby dissident » Fri 28 Aug 2020, 10:59:33

REAL Green wrote:“Bill Gates' nuclear venture plans reactor to complement solar, wind power boom”
https://www.reuters.com/article/us-usa- ... SKBN25N2U8

“A nuclear energy venture founded by Bill Gates said Thursday it hopes to build small advanced nuclear power stations that can store electricity to supplement grids increasingly supplied by intermittent sources like solar and wind power…The 345-megawatt plants would be cooled by liquid sodium and cost about $1 billion each. Nuclear power is a top source of virtually emissions-free electricity, but many plants are shutting in the United States because of high costs and competition from solar and wind. Critics of advanced nuclear have also warned that smaller nuclear is even more expensive than conventional. The new plants, however, are designed to complement a renewable power because they will store the reactor power in tanks of molten salt during days when the grid is well supplied. The nuclear power could be used later when solar and wind power are low due to weather conditions. Molten salt power storage has been used at thermal solar plants in the past, but leaks have plagued some of the projects. Levesque said the Natrium design would provide more consistent temperatures than a solar plant, resulting in less wear and tear.”


Looks like someone is smelling the coffee. But 345 MW class reactors for a billion does not appear to fit the economics. Building 1.2 GW plants makes more sense to replace existing coal plants and gas plants that will not have cheap gas for decades to come. Downsizing nuclear reactors and spreading them all over the place does not make them friendlier or safer.

Alt energy is lost in the wilderness of hype and unrealistic expectations. In its current form it dumps variable power supply onto a large grid maintained by coal, gas and nuclear with stable base-load. Take alt energy poster boy Denmark and its wind mills. Denmark actually exports its power onto the EU grid and then imports back (!) stable power. If it was such a big success at replacing stable load old power than it would not need to do this.

For some reason alt energy is not even trying to transition to a fuel carrier regime, which is the only thing that makes sense for variable power that does not deliver during peak loads. All those wind mills and solar panels should be used to create NH3 or even H2 for use when needed. Replacing fossil fuels for transport would be the ideal. Instead we have the most primitive approach and that is to leverage the existing old grid power as a way to hide the variability.
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Re: THE Nuclear Power Thread pt 9 (merged)

Unread postby vtsnowedin » Fri 28 Aug 2020, 12:37:50

I don't see the point of using a nuclear plant, large or small, to store energy in tanks of molten salt. Why not use the windmills and solar panels to store their excess energy in the salt and use the nuclear plants to provide base load flywheel stabilizing energy to the grid.
It has been known for quite a while the intermittent power becomes a problem once it becomes more then about fifteen percent of the supply. Denmark's export -re import program is one attempt to manage that problem. Large batteries at substations is another possibility being developed. I think storage in a large fleet of EVs hooked to smart two way chargers will also be developed once enough EVs are on the road.
It is a problem but not one without viable solutions but what needs to be done or coordinated is building out the solutions at the same pace as the renewable wind and solar are brought on line. I doubt a possible Biden administration has that one well in hand.
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Re: THE Nuclear Waste Thread (merged)

Unread postby REAL Green » Wed 30 Sep 2020, 06:02:50

“South Korean-Built Mini Nuclear Reactors That "Won't Melt Down" Approved For US”
https://www.zerohedge.com/technology/so ... pproved-us

“Now for the first time South Korean-built key nuclear components will be used in the United States as part of efforts to introduced further safeguards at US facilities. The cutting edge new 'miniature' design was previously described in Forbes as a reactor that "doesn’t need the complex back-up power systems that traditional reactors require" and which "won’t melt down or otherwise cause any of the nightmares people think about when imagining the worse for nuclear power." Nikkei Asian Review reports this week that "Miniature nuclear reactors that use key components from South Korea's Doosan Heavy Industries & Construction have won first-of-its-kind certification for use in the U.S…Nikkei describes what's slated to be a 12-module plant: Each SMR unit is capable of producing 50 megawatts of power, or about 5% that of a conventional reactor. An SMR is considered a safer alternative since it can be cooled in a water tank, cutting out the risk of an accident due to problems with water pumps or the electrical source. Doosan's SMRs are designed to be placed in underground water tanks. There is only a minor risk of reactors losing cooling capabilities due to earthquakes or other external factors…As a 'faster' and 'cheaper' to install - but purportedly safer - reactor design, it could as Nikkie underscores, be "a promising antidote to the trend away from nuclear power in Western countries." The US Department of Energy deems Small Modular Reactors as "a key part of the Department’s goal to develop safe, clean, and affordable nuclear power options,"
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