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.

Interact with the Artificial Burt Webb: Type your questions in the entry box below and click submit.

Example Q&A with the Artificial Burt Webb

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.

Blog

  • Geiger Readings for Jan 23, 2025

    Geiger Readings for Jan 23, 2025

    Ambient office = 767 nanosieverts per hour

    Ambient outside = 79 nanosieverts per hour

    Soil exposed to rain water = 82 nanosieverts per hour

    Campari tomato from Central Market = 101 nanosieverts per hour

    Tap water = 78 nanosieverts per hour

    Filter water = 66 nanosieverts per hour

  • Nuclear Reactors 1467 – Virginia Considering Where To Build Small Modular Reactors – Part 2 of 2 Parts

    Nuclear Reactors 1467 – Virginia Considering Where To Build Small Modular Reactors – Part 2 of 2 Parts

    Part 2 of 2 Parts (Please read Part 1 first)
         Wise County was one of the areas being considered for siting a small modular nuclear reactor after Virginia Governor Glenn Youngkin announced in October of 2022 that he wanted to deploy the nation’s first SMR in the coalfields region of the state. This region was devastated by the ongoing downturn in the coal industry.
         SMRs are smaller, simpler versions of traditional fission nuclear reactors that can be built in a factory and shipped to a site for installation. They produce about one third of the power of currently operating full-sized nuclear fission reactors.
         In March of 2024, Youngkin said that he felt that other sites would be a better fit for the siting of the first SMR. He added that multiple SMRs will eventually be deployed across the state and Southwest Virginia might still get one.
         Dominion Energy is the state’s largest utility. In July of 2024, it announced plans to construct the country’s first SMR in the 2030s at its North Anna plant. This plant is already licensed for a third conventional reactor.
         LENOWISCO has already conducted two studies regarding SMRs, one a feasibility study and the other examining the supply chain. GO Virginia was one of the funders for this research. Asked if those studies would pertain to the microreactor, Miller said that that is a “completely different animal.”
         The grant for the microreactor study must now be approved by the Virginia Department of Housing and Community Development. The grant will need to be matched by an additional fifty thousand dollars.
         The region’s legislators, economic development officials and some local government leaders wanted to site an SMR in the area because of the growth and jobs it was expected to bring. There was also public opposition, particularly from environmental groups that claimed that the public was left out of the process and worried that the technology was new and not proven.
         Wally Smith is the vice president of The Clinch Coalition, which is an environmental group. The group claimed Tuesday that there was a lack of opportunities for public feedback with respect to the sites included in the 2023 LENOWISCO SMR feasibility study that resulted in “confusion and distrust” in Southwest Virginia. He added that he hopes that local officials “learned lessons from that debacle” and will involve local residents in planning for the region’s energy future.
         Smith said “In particular, GO Virginia Region One could step up to the plate and make an inclusive and intentional public listening component a condition of funding this recently proposed microreactor feasibility study. That would go a long way towards restoring the public’s trust in that organization’s ability to grow the local economy not just to benefit political and industry VIPs but to improve the lives of local families.”
         GO Virginia Region 1 includes the cities of Bristol, Galax and Norton, as well as the counties of Bland, Buchanan, Carroll, Dickenson, Grayson, Lee, Russell, Scott, Smyth, Tazewell, Washington, Wise and Wythe.

    Dominion Energy

  • Geiger Readings for Jan 22, 2025

    Geiger Readings for Jan 22, 2025

    Ambient office = 96 nanosieverts per hour

    Ambient outside = 100 nanosieverts per hour

    Soil exposed to rain water = 97 nanosieverts per hour

    Blueberry from Central Market = 108 nanosieverts per hour

    Tap water = 106 nanosieverts per hour

    Filter water = 95 nanosieverts per hour

  • Nuclear Reactors 1466 – Virginia Considering Where To Build Small Modular Reactors – Part 1 of 2 Parts

    Nuclear Reactors 1466 – Virginia Considering Where To Build Small Modular Reactors – Part 1 of 2 Parts

    Part 1 of 2 Parts
         Months ago, it was revealed that the state’s first small modular nuclear reactor would not be built in Southwest Virginia. Local officials are now pushing for a study on the feasibility of placing a smaller nuclear generator, a microreactor, in Wise County, Virginia.
         On Tuesday, a one hundred-thousand-dollar grant that would fund such a study was approved by the GO Virginia Region 1 Council which is an economic development initiative that covers Southwest Virginia.
         Microreactors are compact nuclear reactors that are small enough to be transported by truck. Most of the designs would produce up to twenty megawatts of thermal energy that could be utilized directly as heat or converted to electric power, according to the U.S. Department of Energy’s Office of Nuclear Energy. A small modular nuclear reactor, or SMR, ranges from fifty to three hundred megawatts.
         Currently, there are no microreactors operating in the U.S. Russia has several operating microreactors, according to the Idaho National Laboratory (INL), one of seventeen national labs in the U.S. Department of Energy
        The INL says on its website that new microreactor designs equipped with advanced technologies are being developed by several organizations and companies. Demonstrations of these new microreactors are expected to be held within the next seven years.
         Duane Miller is the executive director of the LENOWISCO Planning District Commission. He told the GO Virginia council last Tuesday that microreactor technology has been used in submarines and aircraft carriers for the last seventy years.
         LENOWISCO is currently assisting the county in its effort because the project could be significant to the region, according to Miller. He went on to say that the broader region of interest for the project is Lee, Wise, Scott and Dickenson counties and the city of Norton.
         After the GO Virginia meeting, Miller claimed that microreactors could provide a stable and consistent power supply to rural areas like Southwest Virginia. This would reduce dependence on “intermittent” sources such as solar or wind power while acting as a recruitment tool for economic sectors that use a lot of energy.
         Miller added that “It is our hope that when completed, this project funded by GO Virginia will assist the region on the best path to move forward.” Microreactors can be designed to assist with powering critical infrastructure like hospitals, universities and water treatment facilities, he said. This would ensure that these services remain operational in rural areas.
         The proposed study would identify and analyze a prospective site for a microreactor and the infrastructure that would be required, according to the grant application. It would also detail the baseload power capabilities and help identify customers such as data centers, the application states.
         Mike Hatfield is the Wise County’s administrator. He said that his county is interested in the possibility of a microreactor because it “wants to remain an energy leader for Virginia.” The county is reviewing all current forms of energy generation including gas, solar, wind, hydrogen and nuclear, according to Hatfield. He went on to say that the county would likely use a microreactor to provide energy to locations that can’t get efficient energy from the local power grid, such as a data center.

    GO Virginia

    Please read Part 2 next

  • Geiger Readings for Jan 21, 2025

    Geiger Readings for Jan 21, 2025

    Ambient office = 98 nanosieverts per hour

    Ambient outside = 116 nanosieverts per hour

    Soil exposed to rain water = 114 nanosieverts per hour

    Campari tomato from Central Market = 96 nanosieverts per hour

    Tap water = 105 nanosieverts per hour

    Filter water = 97 nanosieverts per hour

  • Nuclear Fusion 106 – Commonwealth Fusion Systems Working On Adding Louvers To Tokamaks To Cool Plasma

    Nuclear Fusion 106 – Commonwealth Fusion Systems Working On Adding Louvers To Tokamaks To Cool Plasma

         Decades of global, government-sponsored research in fusion science have established the tokamak-based reactor as the highest performing approach to fusion. In the past, tokamaks have had to be enormous in size to produce net energy from fusion. Commonwealth Fusion Systems (CFS) is using revolutionary superconducting magnets developed in collaboration with MIT to construct smaller and lower-cost tokamak fusion systems.
         CFS is currently developing a tokamak device called SPARC. The company is working to demonstrate the critical fusion energy milestone of producing more output power than input power for the first time in a device that can scale up to commercial power plant size. However, this achievement will only be possible if the plasma doesn’t melt the device.
         Researchers from CFS and Oak Ridge National Laboratory (ORNL) have collaborated on fusion boundary research through a series of projects. These projects include ORNL Strategic Partnership Projects and Laboratory Directed Research and Development projects, work under the Innovation Network for Fusion Energy (INFUSE) program, and other work in partnership with General Atomics.
         Throughout this collaboration, ORNL has developed the simulation capabilities that are necessary to address critical and time-sensitive design issues for the SPARC tokamak.
         The study was published in Nuclear Fusion. It evaluated actuator configurations, in particular those used to control neutral gas flowing in and out of the tokamak.
         A power-producing fusion plasma reactor must reach a temperature at its center hotter than the core of the Sun. At the same time, it must maintain a temperature at the edge of the plasma that is cool enough to avoid vaporizing the fusion device.
         New studies have found that using louvers at the bottom of the fusion device create local conditions that can reduce the temperature of the edge plasma. The louvers permit the hot plasma to “detach” from the walls of the device, spreading out the heat.
         In order to predict the actuators’ ability to control the plasma, ORNL developed new methods to execute a major simulation code, SOLPS-ITER, in a dynamic, time-dependent manner, focused on the actuator design.
         The SOLPS-ITER code models plasma and neutral transport in the boundary region of fusion devices. It has been used to design plasma-facing components for many tokamaks, including the multinational ITER device under construction in France.
         This new dynamic simulation goes beyond standard steady-state models and was developed in a staged manner. First, it considered only plasma transport for predictive control. Next, the response of neutral particles to louver actuators was added. Finally, a fully coupled dynamic model was developed.
         The CFS team used this information from their simulation to zero in on the simplest and least expensive actuator and diagnostics options from a large number of options. This effort enables fusion energy scientists to better control tokamak devices.
         The results of this study indicate a new path for handling this extreme heat, bringing researchers one step closer to a commercial fusion energy source. The study utilized a new simulation capability that accelerates work on whole-device modeling and helps inform researchers about the systems that will control the SPARC plasma.
    In addition to the SPARC tokamak project, CFS is working on its successor, the ARC power plant, to supply power to the electric grid.

    Commonwealth Fusion Systems