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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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 Feb 05, 2023

    Geiger Readings for Feb 05, 2023

    Ambient office = 92 nanosieverts per hour

    Ambient outside = 112 nanosieverts per hour

    Soil exposed to rain water = 114 nanosieverts per hour

    Tomato from Central Market = 91 nanosieverts per hour

    Tap water = 85 nanosieverts per hour

    Filter water = 73 nanosieverts per hour

  • Geiger Readings for Feb 04, 2023

    Geiger Readings for Feb 04, 2023

    Ambient office = 80 nanosieverts per hour

    Ambient outside = 112 nanosieverts per hour

    Soil exposed to rain water = 110 nanosieverts per hour

    Red bell pepper from Central Market = 80 nanosieverts per hour

    Tap water = 107 nanosieverts per hour

    Filter water = 92 nanosieverts per hour

    Dover Sole from Central = 93 nanosieverts per hour

  • Nuclear Reactors 1126 – Radiant Working On A 1 Megawatt Microreactor

    Nuclear Reactors 1126 – Radiant Working On A 1 Megawatt Microreactor

          Former engineers from SpaceX are working on a portable microreactor that is lightweight and cost-effect. They call it the “world’s first portable, zero-emissions power source.”
         The microreactor project was originally intended to be a develop a power source for a Martian colony. The group of engineers decided that Earth needed it more. They founded a company named Radiant to continue work on the microreactor for terrestrial applications. It could provide instant power to hard-to-reach places and quick installation in populated areas.
         John Gehin is the Chief Scientist at the Nuclear Science & Technology Directorate at the Idaho National Laboratory (INL). He issued a statement that read “In some areas of the world, reliance on diesel fuel is untenable, and solar and wind power are either unavailable or impractical. Clean, safe nuclear microreactors are emerging as the best alternative for these environments. Unlike diesel generators, it doesn’t require frequent fuel deliveries, since the fuel in the portable microreactor can last more than four years.”
         Battelle Energy Alliance is the contractor that manages operations at the INL. They are collaborating with Radiant on the microreactor project.
         Home generators emit more pollutants that trucks and industry combined. They also pose a more significant risk to human health. This is because they are located in or near a home and run for long periods. Engineers and startups are searching for low-cost, portable solutions to replace current home generators. Possibilities include solar-powered batteries being used in Nigeria, microgrids in a box, or hybrid solutions that could maintain local power during grid outages.
         Radiant’s portable microreactor could provide a clean solution to a range of power challenges. The portable microreactor is better for the environment without compromising on performance. In addition, it is small enough to fit in a shipping container.
          The microreactor could be deployed to remote regions where fossil-fuel generators would ordinarily be employed. Unlike diesel generators, it does not require frequent fuel deliveries. The fuel in a portable microreactor can last more than four years.
          Doug Bernauer is the co-founder of Radiant. He recently said, “The nuclear industry can benefit greatly from aerospace technologies and software developments that have occurred over the past 20 years, and have not made their way into nuclear.”
          Bernauer was researching energy sources for a possible Martian colony when he realized that there was a need for the same kind of flexible, economical power source right here on Earth. He was motivated to team up with two other former SpaceX engineers and co-found Radiant.
        The Radiant portable microreactor will produce over one megawatt. This would be enough electricity to power about one thousand homes for up to eight years. A group of microreactors could power a small town. The microreactors use an improved fuel that can withstand higher temperatures than most nuclear fuels and does not melt which allows for safer operation.
         Radiant is among many public and private organizations that are working on compact nuclear reactors. However, to date, none have been able to develop a truly compact, economical and long-lasting portable microreactor.

  • Geiger Readings for Feb 03, 2023

    Geiger Readings for Feb 03, 2023

    Ambient office = 77 nanosieverts per hour

    Ambient outside = 126 nanosieverts per hour

    Soil exposed to rain water = 129 nanosieverts per hour

    Icebury lettuce from Central Market = 108 nanosieverts per hour

    Tap water = 109 nanosieverts per hour

    Filter water = 86 nanosieverts per hour

  • Nuclear Reactors 1125 – Slovenské elektrárne Working On Completion Of Unit 3 Reactor at Monchovce Power Plant In Slovak Republic

    Nuclear Reactors 1125 – Slovenské elektrárne Working On Completion Of Unit 3 Reactor at Monchovce Power Plant In Slovak Republic

         Slovenské elektrárne, a.s. (SE) is an electric utility company based in Bratislava, Slovak Republic, and is the successor to the former state monopoly. It operates nuclear, hydroelectric and fossil fuel power plants in the Slovak Republic.
         SE said that over the past weekend, there were successful start up tests and the launch of steam turbines for the new Unit 3 reactor at the Mochovce nuclear power plant. It was connected to the Slovak power grid for the first time at twenty percent of its nominal power at 11 PM on the 31st of January.
         Branislav Strýček is the Chairman and CEO of Slovak Power Plants. He said, “Today represents a fundamental milestone for SE, the community of nuclear energy workers and the entire country. As of today, the third unit converts the thermal energy released in the reactor into electricity. This will help us fulfill the agreement with the government, in which SE undertook to supply cheap electricity for households at a price of EUR61.2077 euros (USD66.7) per megawatt hour, which represents an unprecedentedly low price of electricity for households within the EU. The new block will significantly contribute not only to energy stability, but also to the commitment to reduce greenhouse gas emissions on the road to carbon neutrality.”
         During the energy start-up process, tests have been carried out at increasing power levels – five percent, fifteen percent and twenty percent – of the reactor’s nominal power. The company said, “After successfully preparing and carrying out the tests necessary for the start of the turbines, over the weekend, steam was brought into them for the first time, which gradually spun them up to the nominal speed – 3000 revolutions per minute.”
         Tests were also carried out on the generator itself, the block transformer and the four hundred kilovolts line connecting the plant to the Slovak electricity system. “After completing this part of the power start-up, Slovenské elektrárne could proceed to the actual phasing of the first turbogenerator to the network at 20% of the nominal power of the reactor and the third unit … began supplying the first electricity to the network.”
         The next stage of the launch process will be to test the reactor at levels from thirty five percent to one hundred percent. The final step is the successful completion of a one hundred and forty four hour trial run at the full four hundred and seventy one megawatt output.
         Martin Mráz is the director of the Mochovce plant. He said that in the coming weeks, “the new unit will supply electricity to the grid with short-term planned shutdowns, according to the new unit commissioning schedule”.
         Construction of the first two four hundred and seventy-one megawatt VVER units at the four-unit Mochovce plant began in 1982. Work started on Units 3 and 4 in 1986, however it stalled in 1992. Units 1 and 2 were completed and came online in 1998 and 1999 respectively. A project to complete Units 3 and 4 started in 2009. Unit 4’s schedule has been to follow about one or two years behind work on Unit 3. Each of these reactors will be able to provide about thirteen percent of Slovakia’s electricity needs when operating at full capacity.
         The final design includes many upgrades for safety and security. These include aircraft impact protection and emergency management measures based on lessons learned from the Fukushima disaster which were incorporated during the project. The Slovak Nuclear Regulatory Authority issued the final authorization for commissioning Unit 3 of the Mochovce nuclear power plant in August of this year. The service life of the new reactor is expected to be about sixty years.

  • Geiger Readings for Feb 02, 2023

    Geiger Readings for Feb 02, 2023

    Ambient office = 92 nanosieverts per hour

    Ambient outside = 84 nanosieverts per hour

    Soil exposed to rain water = 81 nanosieverts per hour

    English cucumber from Central Market = 93 nanosieverts per hour

    Tap water = 79 nanosieverts per hour

    Filter water = 68 nanosieverts per hour

  • Nuclear Reactors 1124 – MoltexFLEX Is Researching Graphite For Use In Molten Salt Reactors

    Nuclear Reactors 1124 – MoltexFLEX Is Researching Graphite For Use In Molten Salt Reactors

          MoltexFLEX is a subsidiary of Moltex Energy Limited. It has just received a research grant to work with researchers at the University of Manchester to investigate how its FLEX reactor’s molten coolant salt interacts with graphite. The grant came from the Henry Royce institute of Advanced Materials. It will be used for cutting-edge characterization that will help qualify industrial-grade graphite for application in advanced molten salt nuclear technologies. The award is part of the Industrial Collaboration Program (ICP). This is a Royce initiative that seeks to boost research, development and innovation activities across the U.K.
         Graphite is a critical material used to control the fission process in the FLEX reactor and many other nuclear reactors. MoltexFLEX is investigating the possibility of using standard industrial-grade graphite as part of the company’s goal to use already available, ‘off-the-shelf’ components and solutions.
          The research program calls for MoltexFLEX scientists to work alongside those of the University of Manchester’s Nuclear Graphite Research Group (NGRG), which have been working in partnership on graphite-related topics since 2020. It will employ state-of-the-art facilities in the university’s irradiated materials laboratory. The researchers will make use of x-ray computer tomography and hard x-ray photoelectron spectroscopy to examine the graphite and its response to molten salt exposure in minute detail.
         MoltexFLEX said that the research will have far-reaching implication. “Using industrial-grade synthetic graphite that has high thermal and chemical resistance will deliver significant cost savings for the FLEX reactor, as well as enabling it to be rolled out across the globe even more quickly.”
         Chris Morgans is the project manager for MoltexFLEX. He said, “We believe that collaboration truly enables the path to technology maturity, and so working with Royce and the University of Manchester on this joint project to determine the effects of molten salts on the physical and mechanical properties of graphite, will not only drive the development of the FLEX reactor design forward, but forge a strong academic-industrial partnership in the process.”
         MoltexFLEX is working on the FLEX reactor which is a thermal neutron (moderated) version of Moltex Energy’s stable salt reactor technology. The FLEX reactor is small and modular. This allows components to be factory-produced and readily transportable, reducing on-site work, increasing speed of construction, and minimizing overall costs. It is passively safe which means that it does not require engineered, redundant, active safety systems. The FLEX reactor has no moving parts and is fueled for twenty years at a time. This means that there is very little need for operator input and very low operating costs. Each FLEX reactor delivers forty megawatts of thermal energy at thirteen hundred degrees Fahrenheit. Moltex plan is to have its first reactor operational by 2029.
         David Landon is the CEO of MoltexFLEX. He said, “Graphite is a significant component of the reactor cost. The success of this research in demonstrating the viability of industrial-grade graphite will contribute to MoltexFLEX’s mission to deliver affordable nuclear power for all.”
        Royce is operating from its hub at the University of Manchester. It is in partnership with nine institutions including the universities of Cambridge, Imperial College London, Liverpool, Leeds, Oxford, Sheffield, the National Nuclear Laboratory, and UKAEA. The universities of Cranfield and Strathclyde are Royce’s associate partners.
         The Royce program is funded by the Engineering & Physical Sciences Research Council, part of UK Research & Innovation. Royce coordinates over three hundred and seventy million dollars’ worth of facilities. They provide a joined-up framework that can deliver beyond the current capabilities of individual partners of research teams.
          The award to MoltexFLEX is part of t he Industrial Collaboration Program. This is a six hundred and eighty-five million dollar Royce initiative for collaborative, business-led research, development and innovation projects aimed at accelerating progress towards a sustainable future.