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Existing stockpiles of SUNF contain 270 years of electricity demand in the US

By Rolan Stein, Oliver Hemmers and Steve Curtis - posted Monday, 17 February 2025


According to the International Atomic Energy Agency, around 96% of currently operating nuclear reactors, which is roughly equivalent to 440 reactors, are water-cooled. The nuclear waste from these water-cooled reactors, i.e., the slightly used nuclear fuel (SUNF) still has 97% of its electricity potential yet to be realized for the "fast breeder reactor" design..

A "fast reactor" is a type of nuclear reactor that uses fast neutrons to sustain a chain reaction, while a "breeder reactor" is a specific design of fast reactor that produces more fissile fuel (like plutonium) than it consumes, meaning it "breeds" new fuel.

Once commissioned, India will only be the second country after Russia to have commercial operating Fast Breeder Reactors.

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We all like to make use of our trash, if possible, generally called "recycling". When we discuss using our nuclear fuel after it has been through a reactor one time, there are two terms commonly used: "reprocessing", and "recycling". When we reuse aluminum cans, we simply melt them down and form them into new sheets of aluminum, which I call "recycling". When we try to use old cars that are trashed, we go through a process to remove gasoline, plastic, tires, rubber, wires, and anything else that is not steel before the remains of the car can be used, which I call "reprocessing". Recycling is a direct process to reuse something, but reprocessing requires more steps to remove impurities.

Early reactor nuclear engineers knew that reclaiming the useful parts of SUNF was desirable. In fact, it was the least imposing engineering problem of the entire fuel cycle. Both recycling and reprocessing were considered, but reprocessing became the method of choice.

France reprocesses on all its SUNF and has ever since their nuclear program began in the early 1960s with no harm to people. This chemical process removes the plutonium from the SUNF and combines it with uranium to create fuel that can be used once more in a reactor. This is not "recycling" because it involves many chemical steps to remove impurities. However, after one reuse, there is not enough material left to salvage and the fuel is retired for permanent storage but still over 80% of that spent fuel remains unused.

The United States Government encouraged private companies to reprocess US commercial SUNF, but President Carter suddenly disallowed the process in 1979. This bankrupted the existing private businesses at great economic loss to the investors. Even though President Reagan reinstated permission to reprocess in 1982, investors no longer trusted the Government and were hesitant to invest again. Furthermore, reactor owners decided that mining, refining and enriching uranium was a cheaper process than reprocessing. Economics doomed SUNF to be stranded on reactor sites with no other proposed solution than to "eventually" store it underground. The government attempted to "solve" the problem, but now, more than 50 years have passed with no solution.

The fiction writers of nuclear power disaster created a specter of doom which convinced the public to revile nuclear power after the mid-1970s. Ironically, we are fortunate that our government was so inept. It turns out that this SUNF is extremely valuable, and we are lucky that we still have access to it above ground.

The trick to fission is to split huge numbers of large atoms with neutrons. Nature features physics that allows more neutrons to be released after each fission, making it possible for continuous energy production called a chain reaction. Each fission releases 50,000,000 times more energy than chemical combustion of a single atom of coal. Uncontrolled, this power creates a powerful bomb. Controlling the chain reaction, however, turns out to be easily manageable and with the support of Presidents Eisenhower and Kennedy, the "Atoms for Peace" program was born. Like all engineering issues, there is room for innovation. "Thermal neutrons" (slow-moving neutrons) have a much better chance to be captured by the right uranium isotope causing a better chance for fission. Water, due to the hydrogen atoms, turns out to be ideal to slow down neutrons and transfer the heat created to do work (make electricity). The first reactors, therefore, were called "light water reactors" since normal water is, indeed, "light water" (no extra neutrons in the hydrogen atoms of the water).

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The Navy chose this method as a power source for their aircraft carriers and submarine nuclear reactors, so it made sense to transfer their existing engineering designs to commercial reactors. The Navy's seven-decade safety track record with nuclear generated electricity to support national security began before the formulation of the Nuclear Regulatory Commission (NRC) and all its regulatory roadblocks. The commercial nuclear power plants are utilizing the light water reactor design, pioneered by the US Navy.

"Fast" indicates that neutrons do not lose all their energy to "thermal" levels. This allows isotope breeding to commence and boost the energy yield at least 30 times what light water reactors offer in the same volume of fuel. Fast reactors directly convert SUNF to energy, so it is "recycling". There are other advantages to fast reactors. They can operate at atmospheric pressure, making them immune to pressure leaks. They can produce much more heat making them more efficient and allowing them to directly cause the production of many useful chemicals without being converted to electricity and back to heat. Fast Reactors are "intrinsically safe" in the sense that their designs allow the reactors to shut themselves down, if necessary, without human intervention needed. Best of all, the designs are mature, and some have already been operated for energy production. Since the material is already mined and refined, it is 100% clean. So, you may be wondering why we do not use this technology. Good thinking.

In the name of safety and security, the US Government has become the nannies of the energy production and transmission businesses in the US. However, in the 70 years of using nuclear power, there has never been even one attempt to use reactor fuel (new or slightly used) to make a bomb or a terrorism device (feared for national security) or to harm anyone in the normal commercial production of nuclear power (safety). We are suggesting that fast reactor recycling is already safe and secure.

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This article was first published at America Out Loud NEWS.



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About the Authors

Rolan Stein is a Perth-based writer who shrouds himself in mystery. Asked for biographical details, he points like a mute to his blog, The Boomtown Rap, which he describes thus: "wide-ranging, acerbic, uneven and somewhat schizoid ... but leavened by wit, I hope. That's my blog and that's me."

Oliver Hemmers has a Doctorate in Physics from the Institute of Radiation and Nuclear Physics at the Technical University of Berlin, Germany. He was a Researcher in Physics, the Executive Director of UNLV’s Harry Reid Center and C- level executive. small Modular Reactors (SMR’s).

Steven Curtis has 32 years of experience in all levels of project management and leadership. His breadth of experience includes DOE/NNSA, EPA, University of Nevada. Las Vegas, Desert Research Institute, Active Army, Nevada Army National Guard, and consulting for FEMA and DHS, Readiness Resource Group, Inc, and National Security Technologies, LLC. Steve is currently consulting or Readiness Resource Group, Inc. in the area of National Security.

Other articles by these Authors

All articles by Rolan Stein
All articles by Oliver Hemmers
All articles by Steve Curtis

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