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Could Earth's Heat Solve Our Energy Problems?

Spacedog79 says...

Statistically nuclear is by far the safest means of energy production, even when it goes wrong the main impact is people panicking. No one died from radiation in Fukushima and there isn't expected to be any statistically detectable radiation health effect.

The figures that say Chernobyl killed thousands are extrapolations based on the LNT model, which assumes cells are unable to repair DNA damage. In fact the cell DNA repair mechanisms are a well established fact these days. Yet we still use LNT as a model, even though at low doses there has never been any real world data to support it.

Deliberate scaremongering is basically what it is.

newtboy said:

The 1mSv per year is the max the employees at the dump/recycling plant can be exposed to, so leeching more than that into public water systems seems impossible unless I'm missing something. This comes mainly from solid scale deposits removed from the closed loop systems.
Average employees in German plants seemed to get around 3 mSv/yr on their table.

At Fukushima, According to TEPCO records, the average workers’ effective dose over the first 19 months after the accident was about 12 mSv. About 35% of the workforce received total doses of more than 10 mSv over that period, while 0.7% of the workforce received doses of more than 100 mSv.
The 10mSv was the estimated average exposure for those who evacuated immediately, not the area. Because iodine 131 has a half life of 8 days, the local exposure levels dropped rapidly, but because caesium-137 has a half life of 30 years, contaminated areas will be "hot" for quite a while, and are still off limits as I understand it.

Sort of...., most of the area surrounding Chernobyl is just above background levels after major decontamination including removal of all soil, but many areas closer to the plant are still being measured at well above safe levels to this day, and unapproachable, while others may be visited only with monitoring equipment, dose meters, and only for short times. It's not back to background levels everywhere, with measurements up to 336uSv/hr recorded in enclosed areas and abandoned recovery equipment (the claw used to dig at the reactor for instance)....no where near that low at the plant itself. Places like the nearby cemetery which couldn't have the contamination removed still measure higher than maximum occupational limits for adults working with radioactive material. The radiation levels in the worst-hit areas of the reactor building, including the control room, have been estimated at 300Sv/hr, (300,000mSv/hr) providing a fatal dose in just over a minute.
http://www.chernobylgallery.com/chernobyl-disaster/radiation-levels/

Don't get me wrong, I support nuclear power. I just don't believe in pretending it's "safe". That's how Chernobyl happened....overconfidence and irresponsibility. If we consider it unacceptably disastrous if it goes wrong, we might design plants that can't go wrong...The tech exists.

Could Earth's Heat Solve Our Energy Problems?

Spacedog79 says...

You'd be surprised.

Geothermal try to keep public exposure to less than 1 mSv per year.

https://www.researchgate.net/publication/283106142_Natural_radionuclides_in_deep_geothermal_heat_and_power_plants_of_Germany

Living near a Nuclear Power station will get you about 0.00009 mSv/year.

Living in Fukushima will get you about 10 mSv in a lifetime, with life expectancy there at about 84 years that is 0.177 mSv/year.

https://www.who.int/ionizing_radiation/a_e/fukushima/faqs-fukushima/en/

Even Chernobyl is almost entirely background radiation now. Radiation is all scaremongering and misinformation these days, so people freak out about it but it really isn't that dangerous. It takes about 100 mSv a year to have even the slightest statistically detectable health effect and far more than that to actually kill someone.

newtboy said:

Please site your sources for this information.
I'm assuming they mean the estimated radiation from a properly functioning nuclear power plant and not the average actual radiation, which includes meltdowns, leaks, transportation accidents, etc. I can't imagine any geothermal plant ever contaminating like Chernobyl or Fukushima did.

It bears noting that coal ash is apparently 3-6 more radioactive than properly functioning nuclear power plants emit for the same energy generation, and it gets absorbed both directly from particles and indirectly in food and water.

Could Earth's Heat Solve Our Energy Problems?

Spacedog79 says...

Don't tell the environmentalists how much radiation geothermal releases. It is many orders of magnitude more than a nuclear power station and if they were held to the same standard they would never be built.

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Spacedog79 says...

Everyone would benefit because all those graduates with crushing debt would be able to do more in the economy which helps everyone including those who didn't go.

Right now the people who benefit are the super rich who own the student debt.

Tiny Bombs in your Blood - The Complement System

Spacedog79 says...

Each to their own, I thought it was great. It's a small glimpse into the mind bogglingly complexity of biological systems that most people have no idea even exist.

Sagemind said:

Kurzgesagt has a history of taking something overly complicated and simplifying it to the point where it looses it's meaning and slips into fantasy-land. With this video, it bridges too many concepts and strings them together, until it becomes unsure what the actual path is.

It does handle a more complex occurrence, so It tries, but it loses it's momentum as it gets going because it consists of too many gaps in facts to complete a proper narrative.

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Spacedog79 says...

The innovation that he missed was the remote control. Being able to switch channels without getting off the sofa changed everything.

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David Attenborough on how to save the planet

Spacedog79 says...

Nuclear energy is the only way we can do it, we can run the planet forever and do things cleanly and more densely to leave more of our planet for wildlife.

The trouble is almost everything we hold as common wisdom about it is completely wrong, using breeder reactors have enough uranium to run the planet forever leaving almost no waste and removing the possibility of big accidents which actually aren't as harmful as commonly believed anyway.

We have thorium too, and many designs of each that can do the job. In fact we have a wealth of of options, but also a decades old and highly effective PR campaign from the fossil fuel industry to convince us otherwise.

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