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 October December 21, 2023

    Geiger Readings for October December 21, 2023

    Ambient office = 69 nanosieverts per hour

    Ambient outside = 111 nanosieverts per hour

    Soil exposed to rain water = 110 nanosieverts per hour

    Red bell pepper from Central Market = 103 nanosieverts per hour

    Tap water = 82 nanosieverts per hour

    Filter water = 73 nanosieverts per hour

  • Nuclear Reactors 1328 – Challenges Of Decommissioning Nuclear Power Plants – Part 1 of 2 Parts

    Nuclear Reactors 1328 – Challenges Of Decommissioning Nuclear Power Plants – Part 1 of 2 Parts

    Part 1 of 2 Parts
         Nuclear power plants generate electricity in some countries. Operational restrictions mandate that a nuclear power plant’s life is about thirty-five to forty-five years. At the end of their life cycle, nuclear power plants are decommissioned. Decommissioning is a very complex process that requires years, if not decades, of planning and execution.
         The International Atomic Energy Agency (IAEA) defines the process of nuclear decommissioning as the combination of two operational tasks that must be performed simultaneously. These consist of administrative and technical activities. As a result of these activities, radioactive resources and waste generated by the operation of the plant must be thoroughly cleaned up. This is done in order for the plant site to be repurposed so it can be used for other purposes.
         The first part of the complete process of nuclear decommissioning involves meticulous planning for ceasing operations, the radiological characterization of materials by experts, and the development of an efficient decontamination strategy for the nuclear site. The second part of the process is the safe dismantling of the facility structures, and the management of waste materials as dictated by rules and regulations. This comprehensive approach ensures the safe, efficient, and effective transition of the land under the plant for other uses in the future.
         In the field of nuclear sciences, the safe decommissioning of facilities is considered an essential part of the whole life cycle management of nuclear power sites. Field experts are hired to devise relevant strategies for the closing and cleanup of nuclear sites.
         The complex nuclear decommissioning process incorporates years of data gathering. The plan for the nuclear decommissioning of any facility is initiated along with the operational authorization of the facility. The plan must be economically and functionally viable. It must cover all associated financial costs. This early planning ensures that the nuclear waste is managed safely without causing any harm to the environment.
         A detailed decommissioning plan is created upon final shutdown, outlining the strategy for safely dismantling the nuclear facility. It describes the steps required to ensure radiation protection for workers and the public, addresses significant environmental impacts, outlines the proper management of radioactive and non-radioactive materials, and details the termination process for regulatory authorization regarding the nuclear facility and its site.
         Various technical, environmental, and social challenges threatened the decommissioning of existing nuclear power facilities and future energy infrastructure. It is critical to understand these challenges and devise sustainable solutions.
         A research article recently published in the journal Energy Policy has highlighted several important challenges faced during the decommissioning of nuclear facilities. The statistics indicate that after mid-2020, only three percent of nuclear reactors have been fully decommissioned.
         Decommissioning existing nuclear energy infrastructure faces technical challenges in safely managing radioactive, toxic, and hazardous materials. Correct handling, transportation, reusing, recycling, and disposing of standardized recycling policies and regulations for end-of-life waste management increases these challenges.
         The economic implications of nuclear decommissioning are expected to be substantial and will increase as more nuclear facilities reach the end of their licensed life. Public funds often finance most nuclear decommissioning in Europe. Inadequate reserves by nuclear power plant operators means that taxpayers will probably bear the future decommissioning costs.
    Please read Part 2 next

  • Geiger Readings for December 20, 2023

    Geiger Readings for December 20, 2023

    Ambient office = 55 nanosieverts per hour

    Ambient outside = 106 nanosieverts per hour

    Soil exposed to rain water = 107 nanosieverts per hour

    Pinapple from Central Market = 97 nanosieverts per hour

    Tap water = 72 nanosieverts per hour

    Filter water = 63 nanosieverts per hour

  • Nuclear Reactors 1326 – Nuclear Start-ups Encounter Serious Problems – Part 2 of 2 Parts

    Nuclear Reactors 1326 – Nuclear Start-ups Encounter Serious Problems – Part 2 of 2 Parts

    Part 2 of 2 Parts (Please read Part 1 first)
         Jacob DeWitte is the CEO of Oklo. He said, “There is a lot of value in staying small because it keeps the project in the scope of a manufacturing and installation project, and not a large infrastructure project.”
         Oklo intends to construct its reactors for under sixty million dollars each. This is a fraction of the cost of the bigger utility scale projects that make-up the existing U.S. reactor fleet. Oklo reactors can be located near industrial customers’ facilities and use factory produced designs. This should dramatically reduce costs.
         Cost increases and schedule delays have blighted large-scale nuclear projects in recent decades. This has made investors wary of the nuclear sector. Georgia Power’s Vogtle Plant faced seven years of delays and a seventeen-billion-dollar cost overrun before the first of its two new reactors began operations this year.
        Vogtle deployed Westinghouse’s new AP1000 reactor design. It was the first reactor that the U.S. has built from scratch in more than three decades. The problems that it encountered “reinforced the reputation for negative construction experiences in the U.S.” This was covered in a report published last Thursday by Columbia University titled Uncertain Costs of New Nuclear Reactors.
         Oklo enjoyed initial success when it attracted funding from the U.S. government and fuel from Idaho National Laboratory for its first plant in the state. It hopes that the new plant will start operations in 2027. However, like many of the new generation of nuclear start-up, Oklo has experience serious challenges as it tries to prove its technology to regulators and raise funds.
         Last year, the Nuclear Regulatory Commission (NRC) denied Oklo’s application to build and operate its Idaho project. The NRC said that Oklo did not provide enough information on its reactor design.
         DeWitte told the Financial Times that the company’s application process was delayed by the pandemic. Oklo is engaging with the NRC and expects to file a new application next year.
         Adam Stein is the director of nuclear energy innovation at the Breakthrough Institute which is a Washington-based think tank. He said that the existing regulations were not designed to be flexible because they focused on the existing fleet of reactors which are typically big one-gigawatt water-cooled reactors.
         He added that, “New applicants have to ask for exemptions from specific regulations that are not applicable to their technology, justify why those exemptions are reasonable and hope that the regulator grants them . . . [this] makes it more lengthy, cumbersome and introduces additional regulatory risk.”
         The regulatory challenges come despite strong bipartisan support in the U.S. Congress for the nuclear industry.
         The Biden administration recently asked Congress to provide two billion dollars to support the U.S.-based companies who are trying to boost enrichment and conversion capacity for nuclear fuel. It has also ensured that nuclear projects are eligible for a thirty percent tax credit which is detailed in the Inflation Reduction act for zero carbon power plants.
         Kathryn Huff is the assistant secretary for nuclear energy. She told the Financial Times that progress has been made but she admitted that the sector must overcome these near-term challenges if the U.S. and others are to meet their 2050 emissions reduction goals. At least five to ten new contracts for new nuclear reactors would need to be finalized in the next few years to enable construction to be completed by 2035.
         Huff added that “There are dozens of American nuclear reactor start-ups, which is just a crazy thing that you wouldn’t have heard 20 years ago when nuclear reactors were the bread and butter of big Fortune 500 engineering firms.  [But] in the next two or three years, we need to see those contracts in hand, or else we will not reach the commercial lift-off that is required to get to the amount of clean power we need for 2050.”

  • Geiger Readings for December 19, 2023

    Geiger Readings for December 19, 2023

    Ambient office = 58 nanosieverts per hour

    Ambient outside = 100 nanosieverts per hour

    Soil exposed to rain water = 104 nanosieverts per hour

    Green onion from Central Market = 108 nanosieverts per hour

    Tap water = 70 nanosieverts per hour

    Filter water = 58 nanosieverts per hour

  • Nuclear Reactors 1325 – Nuclear Start-ups Encounter Serious Problems – Part 1 of 2 Parts

    Nuclear Reactors 1325 – Nuclear Start-ups Encounter Serious Problems – Part 1 of 2 Parts

    Part 1 of 2 Parts
        The U.S. plans to expand its nuclear industry face big funding and regulatory challenges. These problems could delay a new generation of smaller, more efficient reactors supported by advocates as critical to fighting climate change. A sharp fall in market support for start-ups developing small modular reactors (SMRs) and other advanced nuclear facilities threaten U.S. ambitions.
         Last month NuScale Power Corporation abandoned plans to construct the first SMR in the U.S., despite receiving one and a half billion dollars in government cost-sharing pledges. They were not able to find enough power utilities who were interested in purchasing electricity from their facility in Idaho. Estimated power prices rose by over fifty percent in two years to eighty-nine dollars per megawatt hour.
         Prior to NuScale problems, a one billion eight hundred million deal between X-energy and special purpose acquisition company (SPAC) Ares Acquisition. The deal was intended to enable the developer of nuclear technologies to go public.
         Currently, the nuclear industry is waiting to find out whether Oklo, a nuclear start-up, can successfully go public via a  blank-check company announced in July with AltC Acquisitions Corporation. The merger was proposed at a valuation of eight hundred and fifty million dollars. This would provide Oklo with five hundred million dollars to develop and commercialize its reactor design.
         Marc Bianchi is an analyst at Cowen. He said, “There was already some investor aversion surrounding Spacs in general, and then you saw the first SMR cancelled, inflation causing a big increase in costs and X-energy’s deal fall through. So investors are certainly more skeptical. This would seem to raise the bar for future transactions.”
         The nuclear industry is racing to design and develop SMRs which are advanced nuclear reactors that have a power capacity of three hundred megawatts or less. Conventional nuclear power reactors have three or more times the capacity. Government and private investors have spent billions of dollars to commercialize the technology in the past decade.
         However, a combination of rising interest rates, inflation and concerns about the nuclear industry’s poor record of delivering projects on time and on budget have soured investor and customer sentiment towards the small but growing cluster of start-ups and other companies in the sector.
         Shares in NuScale, which listed last year, lost almost a third of their value following the cancellation of its Idaho project. The shares are down by seventy percent this year. The problems at NuScale are spreading across the SMR sector.
         X-energy is backed by chemical giant Dow. It was forced to lay off staff last month following its failure to conclude its merger. And the U.S. Defense Logistics Agency recently confirmed it had rescinded a notice of intent to award a contract to Oklo to provide power for an Alaskan air force base.
         Clay Sell is the CEO of X-energy. He said that the problems at NuScale combined with macroeconomic factors and war in Ukraine and Gaze have had a chilling impact on its proposed merger. He went on to say, “When we announced our deal they [NuScale] were trading at a significant premium above their go public price and when we called off the transaction they were below $3. So there were certain realities about the market, which . . . put public equity providers in a risk-off situation.”
         Despite these problems, Oklo said that it was confident that it could conclude its deal in the first quarter of 2024. Its reactors generate fifteen megawatts of electricity. They have significant advantages over existing technology, including being able to operate for ten years or more before they need to be refueled.
    Please read Part 2 next

  • Geiger Readings for December 18, 2023

    Geiger Readings for December 18, 2023

    Ambient office = 67 nanosieverts per hour

    Ambient outside = 86 nanosieverts per hour

    Soil exposed to rain water = 87 nanosieverts per hour

    English cucumber from Central Market = 107 nanosieverts per hour

    Tap water = 80 nanosieverts per hour

    Filter water = 73 nanosieverts per hour