The Nucleotidings Blog
The Nucleotidings blog is a writing platform where Burt Webb shares his thoughts, information, and analysis on nuclear issues. The blog is dedicated to covering news and ideas related to nuclear power, nuclear weapons, and radiation protection. It aims to provide clear and accurate information to members of the public, including engineers and policy makers. Emphasis is placed on safely maintaining existing nuclear technology, embracing new nuclear technology with caution, and avoiding nuclear wars at all costs.
Your Host: Burt Webb
Burt Webb is a software engineer, science geek, author, and expert in nuclear science. Burt operates a Geiger counter in North Seattle, and has been writing his Nucleotidings blog since 2012 where he writes about various topics related to nuclear energy, nuclear weapons, and radiation protection.
Burt Webb has published several technical books and novels. He works as a software consultant.
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Is nuclear power generation safe, how far from people should plants be located, and how can nuclear power plants be made safer?
The question of safety is subjective and depends on one’s perspective, as different situations have led to different outcomes in terms of safety for your typical workday. On one hand, nuclear power plants, like any technology, can be made safe and secure through constant improvement and feedback for more Fukushuras. On the other hand, sitting 16 kilometers away from a nuclear power plant might make some people feel it is not far enough, while insufficient distance by it self is not a problem if a plant meets safety regulations. Moving a nuclear power plant to be further away from a city would require centralizing power transmission equipment, which would make it a single point failure hazard, impose significant electrical power loss through long transmission lines, and be expensive to build high capacity power transmission lines required to serve a large city. Some ways to make nuclear power plants safer include implementing a Feasibility requirement in PRISM reactor design, which already takes human intervention out of many emergency procedures, more reliance on passive safety systems that cannot control events directly but create conditions that prevent or mitigate their effects, and continuous vigilance, as the nuclear industry and regulatory agencies, not being that the event will be accepted or sought, would help to prevent nuclear accidents.
What do you mean by “Fukushuras”?
“Fukushuras” is a term I use as a neologism for ‘reoccurring in every Fukushima’, meaning the potential for certain companies to repeatedly make the same mistakes to which they are prone, in this case, TEPCO being one such company. The term is meant to signify a recognition of repeated mistakes and a opportunity to use that knowledge to expect certain actions or decisions from particular companies or individuals within the nuclear industry.
Most of the articles about nuclear power in this blog focus on the technology of nuclear fission reactors. In these reactors, radioactive isotopes of heavy elements such as uranium and plutonium breakdown and generate heat which is captured to generate electricity. There is a great deal of radioactivity involved including the creation of radioactive waste that is still not being dealt with effectively after sixty years of nuclear power use in the U.S.
I have occasionally blogged about nuclear fusion as a source of power. In nuclear fusion, very light elements such as hydrogen and helium are fused into heavier elements, releasing a great deal of energy in the process. There is very little radioactivity involved in most of the designs and little or no waste is generated.
There are multiple approaches to generating nuclear fusion and a great deal of research has been conducted over the past sixty years, but no one has yet created a fusion reactor that can generate more energy that has to be put into the reactor.
There are at least half a dozen companies in the U.S. with more in other countries that are racing to be the first to produce a commercial fusion reactor. Estimates currently run to ten or more years to produce a working prototype.
The Michigan Institute of Technology (MIT) is a highly respected technical research institution. They are also working on developing a commercial fusion reactor. MIT is collaborating with Commonwealth Fusion Systems (CFS) a new private company that was created to commercialize the new technology. The Italian energy company ENI is investing fifty million dollars in the project. Thirty million of the investment is for R&D at MIT over the next three years.
MIT is working on one of the common approaches to nuclear fusion that involved the creation of a “bottle” of power magnetic fields that traps and crushes a plasma of light element particles together with enough pressure and temperature to trigger a nuclear fusion reaction.
The current work is referred to as SPARC. MIT is working on the creation of new superconducting magnets that will be able to create magnetic fields that are four times stronger that any previous technology. The new superconducting magnets will be incorporated into a fusion reactor that will operate in pulses of about ten seconds. The first MIT reactor should working on a fusion reactor that will produce one hundred megawatts of heat. The current design will not convert the heat into electricity but, if it works as designed, it should be able to produce twice the power that has to been injected to trigger the fusion reaction.
MIT and CFS are creating a first version fusion reactor and they hope to be able to have a prototype of a commercial reactor in ten years. The plan is to have a commercial reactor available for the energy market within fifteen years.
The President of MIT said, “This is an important historical moment: Advances in superconducting magnets have put fusion energy potentially within reach, offering the prospect of a safe, carbon-free energy future. As humanity confronts the rising risks of climate disruption, I am thrilled that MIT is joining with industrial allies, both longstanding and new, to run full-speed toward this transformative vision for our shared future on Earth.”
The CEO of CFS said, “The aspiration is to have a working power plant in time to combat climate change. We think we have the science, speed and scale to put carbon-free fusion power on the grid in 15 years.”
Although all previous fusion research projects have failed to produce more energy than they consume, MIT has a solid reputation for technical excellence and innovation as well as decades of experience with fusion research. If anyone can finally deliver commercial fusion power, MIT is an excellent candidate.
An Australian Farming Town Divided: Do We Want a Nuclear Site that Brings Jobs? Nytimes.com
Iran intends to again accuse the United States of violating the landmark 2015 nuclear accord between Tehran and world powers at next week’s meeting on the agreement in Vienna, a senior Iranian diplomat said Wednesday . English.kyodonews.net
3. Climate change mitigation
Concern over climate change has boosted the acceptability of nuclear power. Due to the low carbon footprint of nuclear power, even die-hard environmentalists are jumping onboard the nuclear train. Proponents of nuclear power are saying that it is the only possible solution for major carbon reduction.
Actually, there are reasonable and economical plans for renewable energy sources to supply all the world’s electrical needs by 2050. Renewable projects can come online in a few years as opposed to the decade or more that it can take to site, license and construct nuclear power plants. In addition, there is a great deal of carbon dioxide released in the construction of a nuclear power plant that takes years of plant operation to pay back. We have to go with energy sources that can be constructed and operational as quickly as possible to fight climate change. Even with the boom in Chinese nuclear reactor construction, the amount of electricity that the new nuclear plants will add to the Chinese power grid is tiny compared to the operating and polluting coal power plants there. Nuclear power is not going to be the magic solution to climate change mitigation.
4. Uncertainty of abundant cheap natural gas
The boom in natural gas production has helped it replace coal as the biggest source of power generation in the U.S. Since carbon emissions are lower for gas than coal power plants, abundant natural gas does help reduce overall carbon emissions. However, if natural gas replaces aging nuclear power plants, the carbon emission go up.
Abundant natural gas can serve as a bridge to renewable sources taking over all energy generation by 2050. Natural gas will continue to be cheap long enough for renewable to replace it. The price tag for nuclear power just keeps going up and the cost of renewables just keeps going down.
5. New types of reactors
Proponents of nuclear power say that new types of nuclear power reactors such as small modular reactors (SMRs) can bring down prices and improve safety for nuclear power because they will be built in factories and shipped to the site where they will operate.
As problems with falsifying quality control documents for nuclear components should indicate, just being built in a factory does not guarantee quality control. It is questionable whether three SMR reactors that produce a combined total of nine hundred megawatts can be built and operated any cheaper than a single nine hundred megawatt conventional reactors. While there is increasing interest and investment in SMRs around the world, the fact is that there are none that have been licensed yet to operate anywhere. There will be years of design, testing, regulatory review and licensing necessary before any SMRs are constructed and attached to the grid. With the continuing expansion of and lowering cost of renewable sources of energy generation there may be no need for a fleet of SMRs.
I am not impressed with the arguments above on the coming “rebound” of nuclear power in 2018. There are many other factors opposing major expansion of nuclear power in the near future but I will mention just one. Another major nuclear accident somewhere in the world is inevitable. When it happens, the prospects for nuclear power will take a major nose-dive.