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.

Blog

  • Nuclear Reactors 1071 – Virginia Governor Announces Plan To Develop Small Modular Reactors – Part 1 of 2 Parts

    Part 1 of 2 Parts
         Glenn Youngkin is the governor of Virginia. Last Monday, Youngkin announced his 2022 Virginia Energy Plan. He said that all forms of energy should be embraced. However, he added that the deadline for having all energy generated from renewable sources by 2050 is unrealistic and too expensive. That was the target date for former Governor Ralph Northam’s Virginia Clean Economy Act (VCEA) goal of one hundred percent zero-carbon energy generation. Youngkin prefers a measured approach with intermediate steps and utilizing all forms of energy.
         Youngkin said, “We must reject the mindset that it is ‘either/or’ and embrace the reality that it is ‘both/and.’ In fact, the only way to confidently move towards a reliable, affordable and clean energy future in Virginia is to go all-in on innovation in nuclear, carbon capture, and new technology like hydrogen generation, along with building on our leadership in offshore wind and solar.”
         Youngkin’s Plan recommends that the commonwealth make strategic investments in innovative, emerging technologies such as hydrogen, carbon capture, storage and utilization, and small modular reactors (SMR). The Plan contains funding to pursue the goal of deploying a commercial SMR in Southwest Virginia within ten years.
         A SMR is an advanced nuclear reactor that generates three hundred or less megawatts of electricity. This is about one third of the output of current full scale commercial nuclear power reactors. SMRs are promoted as being safer and much smaller that convention power reactors. The intention is to construct SMRs in a factory in order to benefit from economies of scale and improved quality control. The modules for a SMR would be shipped to the site and installed. There are studies that suggest that although SMRs are much smaller than conventional power reactors, they would wind up producing more dangerous radioactive waste than a conventional power reactor per unit of power generated.
         The goal of the Plan is for Southwest Virginia to become the nation’s leader in the development and deployment of SMRs. The Plan advocates for the development of the first commercial SMR in the U.S. in Southwest Virginia. It also calls for the development of spent nuclear fuel recycling technologies that offer the promise of a zero-carbon emission system with minimal nuclear waste and a closed-loop supply chain. The state will work with government, industry and academic partners to “develop a plan to deploy a commercial small modular nuclear reactor in Southwest Virginia within 10 years.”
         No specific site has yet been chosen for the SMR. Delegate James W. Morefield is the Republican representative for Tazewell County. He has some reservations about SMRs. He said, “Small nuclear reactors are promising but a great deal of research must be conducted and other factors such as environmental and safety issues must be strongly considered.  and other countries around the world focused heavily on nuclear and renewable energy. They have experienced the dangers of nuclear energy and the expense of renewable energy with several of them now focusing on building new coal-fired power plants.”
    Please read Part 2 next

  • Geiger Readings for Oct 03, 2022

    Ambient office = 117 nanosieverts per hour

    Ambient outside = 93 nanosieverts per hour

    Soil exposed to rain water = 984 nanosieverts per hour

    ARed bell pepper from Central Market = 72 nanosieverts per hour

    Tap water = 96 nanosieverts per hour

    Filter water = 74 nanosieverts per hour

  • Geiger Readings for Oct 02, 2022

    Ambient office = 99 nanosieverts per hour

    Ambient outside = 79 nanosieverts per hour

    Soil exposed to rain water = 80 nanosieverts per hour

    Heirloom tomato from Central Market = 100 nanosieverts per hour

    Tap water = 62 nanosieverts per hour

    Filter water = 52 nanosieverts per hour

  • Geiger Readings for Oct 01, 2022

    Ambient office = 61 nanosieverts per hour

    Ambient outside = 91 nanosieverts per hour

    Soil exposed to rain water = 91 nanosieverts per hour

    English cucumber from Central Market = 97 nanosieverts per hour

    Tap water = 97 nanosieverts per hour

    Filter water = 80 nanosieverts per hour

    Dover Sole from Central = 102 nanosieverts per hour

  • Nuclear Reactors 1070 – Mitsubishi Heavy Industries Is Launching Its New SRZ-1200 Nuclear Reactor With Enhanced Safety Features

         Mitsubishi Heavy Industries (MHI) recently launched the SRZ-1200 advanced pressurized water reactor (PWR) design. The SRZ-1200 was developed in collaboration with four Japanese utilities. It is designed to meet Japan’s enhanced regulatory safety standards.
         MHI stated that the SRZ-1200 has additional safety features when compared with conventional pressurized light water reactors. Its design implements enhanced Japanese regulatory safety standards which incorporate lessons learned from the March 2011 disaster at the Fukushima Daiichi nuclear power plant. MHI claimed that the design will ensure the regulatory requirements of “strengthening safety equipment” and “resistance to natural disaster and security against terrorism and unforeseen event” are fulfilled.
         Low probability postulated events are still accounted for in the reactor design to ensure plant and public safety according to MHI. These new safety mechanisms include an advanced accumulator design and systems which effectively reduce the probability of radioactivity release in the event of a postulated accident. Efforts of this nature and the resulting SRZ-1200 design features will limit any impact to the public and plant site.
         In addition, the SRZ-1200 design is also intended to enhance operational flexibility. This will effectively allow for improved electrical power delivery alongside variable electrical power sources such as renewables.
         MHI said, “The ability to adapt the SRZ-1200 for hydrogen production will also be studied to ensure that all potential uses of energy generated from this plant are efficiently and proactively applied for all of societal needs.” It noted that the name of the reactor is derived from ‘S’ for supreme safety and Sustainability, ‘R’ for resilience and ‘Z’ for zero-carbon emissions.”
         The SRZ-1200 has been designed in collaboration with Hokkaido Electric Power Company, Kansai Electric Power Company, Kyushu Electric Power Company and Shikoku Electric Power Company. All of these utilities have experience in operating PWR nuclear power plants.
         MHI has been involved in the construction and maintenance of all of the twenty-four existing PWR nuclear power reactors in Japan. This has led to the efforts to restart and ensure the safe operation of the existing nuclear power plants.
         MHI said that it intends “to take the SRZ-1200 conceptual design and proceed with basic design efforts”. It aims to bring the new design to market “as early as possible” to “ensure new innovative nuclear technologies are available toward a stable energy supply for Japan”.
         MHI said, “Taking into account the Fukushima Daiichi accident, MHI Group strives to continuously enhance safety through the restart of existing nuclear power plants as well as the safe and stable operation upon restart. This is part of our contribution to society and we intend to continue this contribution through the development of advanced light water reactors which achieve the world’s highest level of safety.”
         MHI’s 2021 Medium-Term Business Plan was published in October of 2020. In the plan, MHI said that it planned to develop new reactor designs. It said it was working on a “next generation” light water reactor that will feature safety improvements such as a core catcher and a radiation leak prevention system. MHI said that such a reactor with a generating capacity of up to twelve hundred megawatts will improve compatibility with renewables by increasing “output adjustment capability”. MHI said that it was targeting commercialization of the new reactor design in the mid-2030s.

  • Geiger Readings for Sep 30, 2022

    Ambient office = 98 nanosieverts per hour

    Ambient outside = 88 nanosieverts per hour

    Soil exposed to rain water = 84 nanosieverts per hour

    Avocado from Central Market = 79 nanosieverts per hour

    Tap water = 119 nanosieverts per hour

    Filter water = 99 nanosieverts per hour