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.
In 1998, the Japanese JT-60 tokamak fusion reactor “produced a high performance reversed shear plasma with the equivalent fusion amplification factor of 1.25” which represented a world record of Q. Q represents the fusion energy gain factor. This is the ratio of fusion power produced by a fusion reactor to the amount of energy that must be expended to maintain the stability of the plasma. A Q=1 is the break-even point where there is as much energy coming out as going in. The European-based work on heavy ion fusion power systems such as HIDIF and GSI-98-06 included the use of telescoping beams of different isotopic nuclei.
In 1999, the United States ended its involvement with the International Thermonuclear Experimental Reactor (ITER). The Small Tight Aspect Ratio Tokamak in the U.K. is retired and replaced by the Mega Ampere Spherical Tokamak experiment which is still in operation today.
In 2001, the construction of the building to house the National Ignition Facility (NIF) at the Lawrence Livermore National Laboratory, begun in 1997, was completed. Work on the laser beam lines and diagnostic bays began this year. The NIF is expected to run its first full test in 2010. Negotiations begin among Canada, European, Japan and Russia on the Joint Implementation of the ITER project.
In 2002, the European Union put forward Cardarache and Vandellos as possible locations for the ITER project. The Cardarache facility in France is a scientific center dedicated to nuclear energy research. The Vandellos Nuclear Power Plant is located in the Catalonia region of Spain. Japan nominated Rokkasho as their candidate for locating the ITER project.
In 2003, the U.S. rejoined the ITER project. China and the Republic of Korea also joined the multination fusion research project. In the same year, Canada pulls out of the ITEM project. The Cardarache facility in France is chosen as the site for the construction of the ITER. Sandia National Laboratories in the U.S. begin running fusion inertial confinement fusion experiments on their Z machine also known as the Z Pulsed Power Facility. It is the biggest X-ray generator ever built. It is used to test how materials react to extremes of temperature and pressure.
In 2004, the U.S. decided that it could not equal the European fusion research progress demonstrated by the Fusion Ignition Research Experiment (FIRE) on its own. The U.S. concluded that it would be best to fully support the ITER project.
In 2005, final negotiations between the E.U. and Japan result in the selection of Cardarache as the site for the construction of the ITER. Japan is allowed to host a related research facility and to name twenty percent of the staff for ITER although it is only providing ten percent of the funding. The NIF test fires a bundle of eight laser beams and achieves the biggest energy laser pulse of one hundred fifty two kiloJoules in the infrared part of the EM spectrum.
The Sandia Z-Machine:
The basic design for China’s CAP1400 reactor has been approved ahead of construction of the first two units, which is set to start at Shidaowan in April. world-nuclear-news
Reports filed with regulators and published Monday showed a number of U.S. nuclear plants dealing with severe weather and other issues into the weekend. nuclearstreet.com
In 1991, Small Tight Aspect Ratio Tokamak (START) experiment was started at Culham, a village near Abingdon in Oxfordshire, U.K. One of the innovations of START was to shrink the aspect ratio of the reactor from the older race track tokamak design to a more spherical shape. It ultimately achieved a record ratio of plasma pressure to magnetic field pressure of forty percent (this ratio is called the beta of the reactor). START utilized a neutral beam injector. This approach consists of injecting a stream of neutral atoms (deuterium in START) into the center of the plasma to assist in heating it.
In 1992, the Engineering Design Activity for the International Thermonuclear Experimental Reactor began following the Conceptual Design Activity for the International Thermonuclear Experimental Reactor which had started in 1988. Euratom, Japan, Russia and the United States are involved in the ITER project.
In 1993, the Experimental Tokamak Fusion Test Reactor (TFTR) at Princeton Plasma Physics Laboratory in New Jersey began testing a mixture of fifty percent deuterium and fifty percent tritium. Later, the TFTR managed to produce ten megawatts from a controlled fusion reaction. It was hoped that the TFTR would ultimately be able to reach the break-even point where more energy was produced than was consume but it was never able to reach break-even.
In 1994, the National Ignition Facility at the Lawrence Livermore National Laboratory completes work on the Beamlet laser which was started in 1990. This laser was designed and constructed to act as a test bed for the development of lasers for fusion research. A comprehensive study of Heavy Ion Fusion called the Heavy Ion Driven Inertial Fusion Study is undertaken in Europe at the Gesellshaft für Schwerionenforschung. The project includes work in fourteen laboratories including labs in the U.S. and Russia.
In 1996, the French Tora Supra tokamak achieves a record two minutes plasma confinement. This included about one million amperes of induced current driven by lower hybrid frequency waves. Active cooling the components that faced the plasma in the tokamak made this possible and helped pave the way for the active control of steady state plasma discharges.
In 1997, the Joint European Torus in the UK generates sixteen megawatts of power from fusion processes which represented a world record for power generation from fusion. The Lawrence Livermore National Laboratory conducts a study of the projected costs of different fusion sources in an attempt to estimate future energy generation costs. They concluded that Heavy Ion Fusion reactors should cost more than a natural gas generator but less than a new fission reactor. A ceremony is held for ground-breaking for the National Ignition Facility (NIF) at the Lawrence Livermore National Laboratory. The NIF is the biggest and most powerful inertial confinement fusion device ever built. Powerful lasers heat and compress a tiny hydrogen pellet to ignite a fusion reaction. A new fusion concept called Magnetized Target Fusion is explored in the U.S. A field-reversed pinch is combined with an imploding magnetic cylinder in this approach. A low density plasma device is compressed explosively with techniques developed for high-speed gun research.
START design for a tokamak:
More than a decade and a half after the Cold War ended, the world’s combined stockpile of nuclear warheads remain at unacceptably high levels. ploughshares.org
A freezing valve resulted in a water spill on the grounds of Entergy’s River Bend nuclear plant Tuesday, but it did not pose a risk to public health. nuclearstreet.com
