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#501 2022-09-01 01:32:01

Mars_B4_Moon
Member
Registered: 2006-03-23
Posts: 4,782

Re: Nuclear power is safe

Department of Energy and Los Alamos National Laboratory teaming up on a $9.25 million study to examine corrosion-resistant materials for use in Molten Salt Reactors

https://www.theregister.com/2022/08/11/ … lten_salt/

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#502 2022-11-21 09:39:34

SpaceNut
Administrator
From: New Hampshire
Registered: 2004-07-22
Posts: 26,803

Re: Nuclear power is safe

Not to be a political post as represented by article title as the Diablo Canyon plant is currently scheduled to shut down in two phases, with the first reactor going offline in 2024 and the second in 2025.

Biden gives PG&E $1 billion to keep the Diablo Canyon nuclear plant open

which was already being delayed

Gov. Gavin Newsom has led a spirited push to keep the reactors humming another five years, saying they're badly needed to help the Golden State grapple with power shortages and worsening heat waves. Diablo Canyon supplied more than 8% of California's electricity last year — and 17% of the state's climate-friendly, carbon-free electricity

So, what does that buy?

The $1.1 billion in federal money comes from the infrastructure law passed by Congress and signed by President Biden last year. It should allow PG&E to pay back most of the $1.4-billion loan for Diablo that state lawmakers approved at Newsom's urging.

That state money is slated to help PG&E cover the costs of relicensing at the U.S. Nuclear Regulatory Commission, as well as maintenance, fuel purchases and additional on-site storage for radioactive waste needed to keep the plant running past 2025.

Final terms of the federal grant still need to be negotiated with PG&E. Officials at the U.S. Department of Energy say the money will be distributed over four years, from 2023 through 2026. It's designed to cover PG&E's projected losses from keeping Diablo Canyon open longer, so if the company's operating costs come in lower than expected — or its power-sales revenues are higher than expected — it won't get quite as much federal money.

If the plant fails to secure its federal license renewal — or any of the state permits it needs to keep operating — the funding spigot will be shut off.

The governor capitalized on those shifting tides, cajoling state lawmakers into approving a $1.4-billion loan designed to keep Diablo running through 2030.

But why now to change to nuclear?

The vote came during an intense heat wave, which saw state officials beg Californians to use less power during the hot evening hours — when solar panels and wind turbines stop generating — for a record 10 straight days.

So, the raw energy supply was exceeded without people cutting back when supplemental energy was not available.

Here is what the state of the us nuclear programs are up against

The U.S. had 93 operating nuclear reactors last year, which generated nearly one-fifth of the nation's electricity. Those plants could go a long way toward meeting President Biden's goal of 100% climate-friendly electricity by 2035.

But 13 reactors have shut down since 2013, often due to competition from lower-cost energy sources such as solar, wind and natural gas. In some cases, nuclear closures have led to more business for gas-fired power plants, causing climate pollution to rise.

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#503 2022-11-23 09:54:16

SpaceNut
Administrator
From: New Hampshire
Registered: 2004-07-22
Posts: 26,803

Re: Nuclear power is safe

Nuclear provides just 10% of the electrical energy but when all sources are combined its drops to just 4%

AA14sNvO.img?w=534&h=534&m=6

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#504 2022-11-29 06:25:18

Calliban
Member
From: Northern England, UK
Registered: 2019-08-18
Posts: 2,236

Re: Nuclear power is safe

Interesting results from experiments on reactions between sodium and CO2.
https://www.sciencedirect.com/science/a … 9317302728

Whereas water reacts spontaneously with sodium, releasing hydrogen; CO2 is non-flammable with sodium until temperature reaches almost 600°C.  This simplifies the use of S-CO2 power generation cycles.


"Plan and prepare for every possibility, and you will never act. It is nobler to have courage as we stumble into half the things we fear than to analyse every possible obstacle and begin nothing. Great things are achieved by embracing great dangers."

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#505 2022-12-03 11:08:05

Void
Member
Registered: 2011-12-29
Posts: 5,096

Re: Nuclear power is safe

I am no expert, but thought that the notion of nuclear, chemical methods to produce Hydrogen looks, like it would be good, at least for Space.

https://www.youtube.com/watch?v=_uTZWaJU6ho

Maybe educated people can give council on this.

Done.


Done.

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#506 2022-12-04 10:43:59

Calliban
Member
From: Northern England, UK
Registered: 2019-08-18
Posts: 2,236

Re: Nuclear power is safe

The interesting thing about hydrogen, or a hydrogen derived synthetic fuel, is that the reactors do not need to be anywhere near the consumers.  And a huge amount of synfuel is needed.  Very low cost power can be provided by large modular reactors, with power 1000+ MWe, built on barges.  These could be built using shipyard fabrication methods.  The barges would be floated into concrete pens.

Last edited by Calliban (2022-12-04 10:45:07)


"Plan and prepare for every possibility, and you will never act. It is nobler to have courage as we stumble into half the things we fear than to analyse every possible obstacle and begin nothing. Great things are achieved by embracing great dangers."

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#507 2022-12-04 11:10:01

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 12,075

Re: Nuclear power is safe

For Calliban re #506

Please continue developing your ideas! 

I am ** pretty sure ** that Russia has built at least one floating reactor, and I'm equally confident that China has done something similar.

A vision of a floating nuclear zone, fully secured from attack by a major Nation, seems conceivable.

Whatever Nation takes this on needs to have long term stability.

(th)

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#508 2022-12-04 12:00:04

SpaceNut
Administrator
From: New Hampshire
Registered: 2004-07-22
Posts: 26,803

Re: Nuclear power is safe

Sounds like an oil rig would be due to put the reactor on with a floating dry dock for the barge or tanker to dock with for loading of the cargo. Sure, some tanks and cooling on the oil rig is required to pre-condition and filter the fuel to be loaded onto the cargo ship but it's now away from concentrated populations to say not in my back yard to keep it from being built.

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#509 2022-12-04 12:59:37

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 12,075

Re: Nuclear power is safe

For SpaceNut re #508

A floating site for a reactor would have some advantages.

Such a system would be better able to handle variations in water level.

An oil platform that is floating might work well.

An oil platform that is fixed to the bottom of the water body is subject to earthquake and resulting tsunami events.

Please continue developing your ideas.  You and Calliban appear to be on a roll!

(th)

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