this post was submitted on 01 Feb 2024
129 points (90.1% liked)

News

23310 readers
5390 users here now

Welcome to the News community!

Rules:

1. Be civil


Attack the argument, not the person. No racism/sexism/bigotry. Good faith argumentation only. This includes accusing another user of being a bot or paid actor. Trolling is uncivil and is grounds for removal and/or a community ban. Do not respond to rule-breaking content; report it and move on.


2. All posts should contain a source (url) that is as reliable and unbiased as possible and must only contain one link.


Obvious right or left wing sources will be removed at the mods discretion. We have an actively updated blocklist, which you can see here: https://lemmy.world/post/2246130 if you feel like any website is missing, contact the mods. Supporting links can be added in comments or posted seperately but not to the post body.


3. No bots, spam or self-promotion.


Only approved bots, which follow the guidelines for bots set by the instance, are allowed.


4. Post titles should be the same as the article used as source.


Posts which titles don’t match the source won’t be removed, but the autoMod will notify you, and if your title misrepresents the original article, the post will be deleted. If the site changed their headline, the bot might still contact you, just ignore it, we won’t delete your post.


5. Only recent news is allowed.


Posts must be news from the most recent 30 days.


6. All posts must be news articles.


No opinion pieces, Listicles, editorials or celebrity gossip is allowed. All posts will be judged on a case-by-case basis.


7. No duplicate posts.


If a source you used was already posted by someone else, the autoMod will leave a message. Please remove your post if the autoMod is correct. If the post that matches your post is very old, we refer you to rule 5.


8. Misinformation is prohibited.


Misinformation / propaganda is strictly prohibited. Any comment or post containing or linking to misinformation will be removed. If you feel that your post has been removed in error, credible sources must be provided.


9. No link shorteners.


The auto mod will contact you if a link shortener is detected, please delete your post if they are right.


10. Don't copy entire article in your post body


For copyright reasons, you are not allowed to copy an entire article into your post body. This is an instance wide rule, that is strictly enforced in this community.

founded 1 year ago
MODERATORS
 

Off the Siberian coast, not far from Alaska, a Russian ship has been docked at port for four years. The Akademik Lomonosov, the world’s first floating nuclear power plant, sends energy to around 200,000 people on land using next-wave nuclear technology: small modular reactors.

This technology is also being used below sea level. Dozens of US submarines lurking in the depths of the world’s oceans are propelled by SMRs, as the compact reactors are known.

SMRs — which are smaller and less costly to build than traditional, large-scale reactors — are fast becoming the next great hope for a nuclear renaissance as the world scrambles to cut fossil fuels. And the US, Russia and China are battling for dominance to build and sell them.

(page 2) 31 comments
sorted by: hot top controversial new old
[–] KillingTimeItself@lemmy.dbzer0.com 1 points 9 months ago (1 children)

SMRs are interesting.

Frankly i just think we need to take SMR tech and scale it up to stationary plant size. I realize thats a big ask, but it's already a big enough ask to make SMRs a thing that exist and work. Plus a whole plant is more inline with existing regulations.

Also worst case scenario, it's just normal nuclear plants. Instead of a bunch of small ones. We have a bunch of big ones, but with standardized designs.

[–] AA5B@lemmy.world 1 points 9 months ago (1 children)

Big Bespoke Reactors? Isn’t that what we do now?

I thought the entire advantage was to be small and use multiple.

  • Construction is cheaper because you can gear up a factory to make many of the same thing
  • Assembly is cheaper and more reliable because you have more complete modules shipped in for less site assembly
  • Sizing is cheaper because instead of designing for the specific site and specific needs, design for how many standard modules you want
  • Enhancing is cheaper because a smaller unit is easier to fit into whatever situation you have than to redesign the whole thing
  • Maintenance is cheaper because taking one offline is less of a hit in total power generation

I think you'll notice i never said bespoke. Realistically there will be minor differences from plant to plant, but you just design it in such a way that it's modular and not super set in stone, which will help alleviate that problem.

[–] IchNichtenLichten@lemmy.world 0 points 9 months ago* (last edited 9 months ago) (2 children)

"SMRs — which are smaller and less costly to build than traditional, large-scale reactors"

They somehow forgot to mention a few key things:

They don't actually exist yet.

They may be cheaper but they generate way less power. If you added up the cost of enough SMRs to equal one conventional nuclear plant they would be even more expensive than an already prohibitively expensive method of generating power.

What a dumb article.

[–] CaffeinatedMoth@lemm.ee 0 points 9 months ago (11 children)

One significant benefit of these would be the lack of transmission losses that plague massive plants which have to send electricity sometimes hundreds of miles. Having smaller units maintained by municipalities would be cheaper for cities far from major electrical plants.

[–] Sir_Osis_of_Liver@kbin.social 0 points 9 months ago

I was curious, so I checked to see the current longest ultra-high voltage dc transmission line:

The Changji-Guquan ultra-high-voltage direct current (UHVDC) transmission line in China is the world’s first transmission line operating at 1,100kV voltage.

Owned and operated by state-owned State Grid Corporation of China, the 1,100kV DC transmission line also covers the world’s longest transmission distance and has the biggest transmission capacity globally.

The transmission line traverses for a total distance of 3,324km (2065 miles) and is capable of transmitting up to 12GW of electricity.

As a general rule of thumb, HVAC lines will be somewhere around 5-6% line loss per 1000kms, and HVDC somewhere around 3%/1000kms

load more comments (10 replies)
[–] 4am@lemm.ee -2 points 9 months ago (1 children)

They exist, what do you mean? We’ve been powering a fleet of submarines with them since the 1950s.

Yeah, it’s going to cost a lot upfront to get them commercially viable, but for the few places where renewables need assistance, I don’t see why this can’t make sense.

load more comments (1 replies)
[–] afraid_of_zombies@lemmy.world -2 points 9 months ago

Hey if you spiritual but not religious types could not fuck this up like the boomers did we would all appreciate it. I get it, you got pyramid power and The Secret. I don't care. That is your concern. Once you start shilling for OPEC it becomes our concern.

load more comments
view more: ‹ prev next ›