Watching the mummy returns reminded me of an article i had read some time ago, arguably one of the scariest i ever read. it talks about the problem of marking a site as dangerous for 10 ka into the future.

These standing stones mark an area used to bury radioactive wastes. The area is … by … kilometers and the buried waste is … kilometers down. This place was chosen to put this dangerous material far away from people. The rock and water in this area may not look, feel, or smell unusual but may be poisoned by radioactive wastes. When radioactive matter decays, it gives off invisible energy that can destroy or damage people, animals, and plants.
Do not drill here. Do not dig here. Do not do anything that will change the rocks or water in the area.
Do not destroy this marker. This marking system has been designed to last 10 ka. If the marker is difficult to read, add new markers in longer-lasting materials in languages that you speak. For more information go to the building further inside. The site was known as the WIPP (Waste Isolation Pilot Plant) site when it was closed in …

2006-10-16: Well-researched Thorium piece, but Michael needs to become more concise: he repeats himself too much in this piece.

Sometime between 2020 and 2030, we will invent a practically unlimited energy source that will solve the global energy crisis. This unlimited source of energy will come from thorium. A summary of the benefits, from a recent announcement of the start of construction for a new prototype reactor:

• There is no danger of a melt-down like the Chernobyl reactor.
• It produces minimal radioactive waste.
• It can burn plutonium waste from traditional nuclear reactors.
• It is not suitable for the production of weapon grade materials.
• Global thorium reserves could cover our energy needs for 1000s of years.

2007-10-01: Using beta decay for batteries. Now being rehashed as the new hotness.
2008-01-09: Micro Nuclear Reactor

The new reactor, which is only 7m x 2m, could change everything for a group of neighbors who are fed up with the power companies and want more control over their energy needs.

2008-05-22: Why bother with oil-based stuff when you can have distributed nuclear energy with Uranium hydride batteries?
2008-07-24: Uranium Deep Burn

It is projected that volumes of high-level waste could be reduced by a factor of 50, while extra electricity is generated.

2008-12-01: Thorium

Besides the low amount of waste and almost complete burning of all Uranium and Plutonium, another big advantage of liquid fluoride reactors is fast and safe shutoff and restart capability. This fast stop and restart allows for load following electricity generation. This means a different electric utility niche can be addressed other than just baseload power for nuclear power. Currently natural gas is the primary load following power source. Wind and solar are intermittent in that they generate power at unreliable times. LFTR would be reliable on demand power.

Fuck ethanol. Lets have some 21st century nuclear power

Thorium is one of the victims of the brainless scare campaign against nuclear that has infected most western nations over the last 30 years. Instead of doing silly stunts like the germans, whose “exit” from nuclear energy will mean more coal plants being built, an enlightened nation would chose thorium.

Instead, we are stuck with aging reactors (how does that make anyone safer?) and scientific illiteracy both in the general population and elected representatives.

I’m generally dismayed how little discussion about thorium there is in energy circles.

Kirk Sorensen provides an update on the current state of thorium power. The bad news is that it still remains mostly theoretical concept; no operational reactor has been deployed yet — even as a prototype. However, new thorium nuclear molten salt experiments were just started in Europe. We have good “line of sight” on the science to build one — so, at this point, the limiting factor is mostly funding. In a world of privately-funded space travel, such a gating obstacle shouldn’t remain for long. 4 specific difficulties have been mentioned:

• Salts can be corrosive to materials.
• Designing for high-temperature operation is more difficult
• There has been little innovation in the field for several decades
• The differences between LFTRs and the light water reactors in majority use today are vast; the former “is not yet fully understood by regulatory agencies and officials.”

Andrew Yang has proposed a nuclear subsidy—$50B over 5 years

2008-12-09: Steven Chu Energy Secretary

he is pro-nuclear and has a deep understanding of all the technical issues around energy. Real change from the Bush administration in selecting extreme competence. It is not in any way a guarantee of correct energy choices because there is still political reality.

2014-02-04: The Linear No-Threshold (LNT) Radiation Dose Hypothesis, which surreally influences every regulation and public fear about nuclear power, is based on no knowledge whatever.

At stake is the 100s of billions spent on meaningless levels of “safety” around nuclear power plants and waste storage, the projected costs of next-generation nuclear plant designs to reduce greenhouse gases worldwide, and the extremely harmful episodes of public panic that accompany rare radiation-release events like Fukushima and Chernobyl. (No birth defects whatever were caused by Chernobyl, but fear of them led to 100K panic abortions in the Soviet Union and Europe. What people remember about Fukushima is that nuclear opponents predicted that 100s or 1000s would die or become ill from the radiation. In fact nobody died, nobody became ill, and nobody is expected to.)
2014-02-14: You can power the world for 72 years with the nuclear waste that exists today, at a price cheaper than coal. Of course it will likely not happen due to collusion between the coal industry and the fear industrial complex.

2015-03-18: China nuclear

China approved 2 reactors this month as it vowed to cut coal use to meet terms of a CO2-emissions agreement reached in November between President Xi Jinping and US counterpart Barack Obama. About $370b will be spent on atomic power. Plans to 3x nuclear capacity by 2020 to as much as 58 gigawatts.

2015-06-15: Amazing energy densities

Assuming a 25% conversion efficiency, a Radioisotope Power Source (RPS) would have 400K MJ / kg (electric) compared to 0.72 MJ / kg for Li-ion batteries. The goal is make a 5 watt “D cell” but with nuclear power that lasts decades

2016-05-16: TerraPower

Bill Gates is funding Nathan Myhrvold’s Terrapower, a fast breeder reactor that burns a U238 duraflame log for 60 years, with 99% efficiency vs 1% for today’s U235 reactors. No fuel to reload or waste to ship around. Existing nuclear waste could be used as fuel.

2016-11-14: Molten Salt Fission

“It is the first time a comprehensive IAEA international meeting on molten salt reactors has ever taken place. Given the interest of Member States, the IAEA could provide a platform for international cooperation and information exchange on the development of these advanced nuclear systems.” Molten salt reactors operate at higher temperatures, making them more efficient in generating electricity. In addition, their low operating pressure can reduce the risk of coolant loss, which could otherwise result in an accident. Molten salt reactors can run on various types of nuclear fuel and use different fuel cycles. This conserves fuel resources and reduces the volume, radiotoxicity and lifetime of high-level radioactive waste.

2016-11-28: Making nuclear energy radically less expensive

“The big thing is that the government is making national lab resources available to private companies in a way that it wasn’t before. If you are a nuclear startup, you can only go so far before you need to do testing, and you are not going to build a nuclear test facility, because that is hard and expensive. But now you could partner with a national lab to use their experimental resources. I’ve been talking about how to set up a pathway from universities for this kind of research.”

2016-12-01: Coal to nuclear can rapidly address 30% of CO2

The high temperature reactors can replace the coal burners at 100s supercritical coal plants in China. The lead of the pebble bed project indicates that China plans to replace coal burners with high temperature nuclear pebble bed reactors.

2017-02-22: 1m tons of nuclear fuel

The amount of used nuclear fuel will continue to increase, reaching around 1M tons by 2050. The uranium and plutonium that could be extracted from that used fuel would be sufficient to provide fuel for at least 140 light water reactors of 1 GW capacity for 60 years. “It makes sense to consider how to turn today’s burden into a valuable resource.”

2017-08-16: How it is going with China nuclear

The overall cost of this first of a kind nuclear plant will be in the neighborhood of $5K/kw of capacity. That number is based on signed and mostly executed contracts, not early estimates. It is 2x the initially expected cost. 35% of the increased cost could be attributed to higher material and component costs that initially budgeted, 31% of the increase was due to increases in labor costs and the remainder due to the increased costs associated with the project delays.

Zhang Zuoyi described the techniques that will be applied to lower the costs; he expects them to soon approach the $2k / kw capacity range. If this can be achieved then the 210 MW reactor would be $525m. A 630 MW reactor would be $1.5b. It could be less if the 600 MW reactor only had to have the thermal unit and could use the turbine and other parts of an existing coal plant.

2018-11-09: Towards approval

Terrestrial Energy is leading the way to getting regulatory approvals for its molten salt
fission reactor design. Terrestrial Energy aims to build the first walkaway safe molten salt modular reactor design in the late 2020s. IMSR generates 190 MW electric energy with a thermal-spectrum, graphite-moderated, molten-fluoride-salt reactor system. It uses standard-assay low-enriched uranium (less than 5% 235U) fuel.

2019-06-24: Nuclear Waste Storage

Deep in the bedrock of Olkiluoto Island in southwest Finland a tomb is under construction. The tomb is intended to outlast not only the people who designed it, but also the species that designed it. It is intended to maintain its integrity without future maintenance for 100 ka, able to endure a future ice age. 100 ka ago 3 major river systems flowed across the Sahara. 100 ka ago anatomically modern humans were beginning their journey out of Africa. The oldest pyramid is around 4.6 ka old; the oldest surviving church building is fewer than 2 ka old.

This Finnish tomb has some of the most secure containment protocols ever devised: more secure than the crypts of the Pharaohs, more secure than any supermax prison. It is hoped that what is placed within this tomb will never leave it by means of any agency other than the geological.

The tomb is an experiment in post-human architecture, and its name is Onkalo, which in Finnish means “cave” or “hiding place.” What is to be hidden in Onkalo is high-level nuclear waste, perhaps the darkest matter humans have ever made.

2020-05-20: 3D-Printed Nuclear Reactor

The reams of data generated by 3D-printing parts can speed up the certification process and lower the cost of getting a nuclear reactor online.

2021-04-20: Nuclear power failed. We need to deeply understand these reasons, because there won’t be a energy transition without new nuclear.

To avoid global warming, the world needs to massively reduce CO2 emissions. But to end poverty, the world needs massive amounts of energy. In developing economies, every kWh of energy consumed is worth $5 of GDP.

How much energy do we need? Just to give everyone in the world the per-capita energy consumption of Europe (which is only half that of the US), we would need to more than triple world energy production, increasing our current 2.3 TW by over 5 additional TW:
If we account for population growth, and for the decarbonization of the entire economy (building heating, industrial processes, electric vehicles, synthetic fuels, etc.), we need more like 25 TW. The proximal cause of nuclear‘s flop is that it is expensive. In most places, it can’t compete with fossil fuels. Natural gas can provide electricity at 7–8 cents/kWh; coal at 5 c/kWh.Why is nuclear expensive? I’m a little fuzzy on the economic model, but the answer seems to be that it‘s in design and construction costs for the plants themselves. If you can build a nuclear plant for around $2.50/W, you can sell electricity cheaply, at 3.5–4 c/kWh. But costs in the US are around 2–3x that. (Or they were—costs are so high now that we don’t even build plants anymore.)

2022-09-14: Simple reactor designs that can be iterated quickly may be the future

Much of the future lies with KRUSTY-like kilowatt-scale systems. Nuclear has a power density problem that keeps it from powering our cars and planes. The shielding and heat engines are too heavy. The radiation and particles are harmful because they contain a lot of energy. The answer is to make solid-state technologies that convert heat and radiation into electricity. It is theoretically possible to turn gamma rays into electricity with something similar to a solar cell. Shielding gets lighter and generates electricity! It also brings new life to many isotopes that require too much shielding to be practical in radioisotope generators. In the meantime, kilowatt-scale systems can compete in smaller remote power applications and supplement solar microgrids. Further cost decreases could enable electricity customers to defect from the grid where solar is not feasible. Competing manufacturers promise a much more competitive industry than exists today, where incentives rarely encourage falling prices.

The endgame is a chunk of nuclear material that can regulate itself based on user demand, surrounded by energy-capturing devices that soak up every bit of emitted energy. Power density could exceed today’s liquid fuels and batteries while having extreme energy density. We’d finally get our flying cars! Reactors that look like KRUSTY are on the path to that endgame.

2023-03-25: Nuclear has some near-fatal problems that make it a non-starter on earth. Beyond the well-known overregulation, the biggest problem is that nuclear produces relatively low temperature heat that then has to be converted to electricity, which is very inefficient. A process would have to be found to turn radiation and heat directly into electricity, without the steam turbines.
2023-07-13: How we got the current regulatory regime

In a world where industry and activists fought to a standstill, Probabilistic Risk Assessment provided the only credible guiding light. Rasmussen and team first began to compile and model relevant data in the early 1970s. Over the decades the industry’s database grew, and the NRC developed an opinion on every valve, every pipe, the position of every flashing light in a plant. This angered the utilities, who could not move a button on a control panel without reams of test data and its associated paperwork. This angered activists when the refinement of models predicted safety margins could be relaxed.

But Probabilistic Risk Assessment has no emotions. Probabilistic Risk Assessment estimated, validated, learned. Probabilistic Risk Assessment would form the barrier protecting us from catastrophe.