Articles tagged with Nuclear Power Plants
Researchers sampled radiocesium at 8 beaches up to 100 km from Fukushima Dai-ichi Nuclear Power Plant, finding highest levels in brackish groundwater beneath the beaches. The concentrations do not pose public health risks but have implications for nuclear power plant management.
The retirement of aging power plants will complicate achieving long-term carbon dioxide emission reduction targets and require significant capital investments. The study found that younger coal plants tend to retire earlier than older ones, creating an imbalance in investment emphasis between generating capacity and emissions reductions.
The Consortium for Advanced Simulation of Light Water Reactors (CASL) developed a model of the Watts Bar Unit 2 reactor core before startup and simulated its initial cycle. The simulations confirmed engineers' predictions on safe operation and provided detailed hour-by-hour behavior during power escalation. CASL's high-fidelity code su...
A new automated system, called CRAQ, detects cracks in the steel components of nuclear power plants using an advanced algorithm and machine learning technique. The system outperformed two others under development, providing more robust results by processing multiple video frames and filtering out falsely detected cracks.
The Fukushima Nuclear Power Station accident in Japan 2011 had significant societal impacts and raised questions about risk management. The article compares Fukushima to the 1986 Chernobyl Nuclear Power Plant accident in Ukraine, highlighting key differences and similarities.
Recent studies have shown variable levels of radioactive contamination in fish, but population-level effects have not been observed. The long-term fate of the contamination remains unknown, with further research needed to understand its effects on marine ecosystems.
A Fusion Nuclear Science Facility (FNSF) would test materials and generate fusion fuel, paving the way for a pilot plant that demonstrates net energy production. Spherical tokamaks' design produces high-pressure plasmas with relatively low magnetic fields.
A major international review found that radiation levels in oceans are decreasing, except near the Fukushima plant where ongoing releases remain a concern. The report highlights the need for continued radiation assessment to understand changing risks.
Researchers analyzed rice, soil, mushroom, and soybean samples from 100-250 km from the plant to identify original sources of radioactive contamination. Their results suggest that radiocesium southwest comes from reactor cores 1, 2, and 3.
The study found that critical backup generators were built in low-lying areas at risk for tsunami damage despite warnings from scientists. The researchers identified arrogance, ignorance, design flaws, and regulatory failures as key factors leading to the disaster.
A three-year study reveals that contaminated sediments from Fukushima are resuspended by typhoons and transported to the Pacific Ocean. The research team tracked radiocesium levels in sediment samples along the continental shelf and slope, finding high concentrations of clay material characteristic of near-shore sediments.
A three-part series in The Lancet highlights the enduring radiological and psychological impact of nuclear disasters, including elevated rates of depression and post-traumatic stress disorder. Researchers emphasize the need for improved communication about health risks and adequate medical support for vulnerable populations.
A new system using sound waves helps detect structural defects in pipes, engines, and nuclear power plants. Researchers have developed a non-destructive testing method that could also be applied to medical imaging and seismology.
A new congressionally mandated report emphasizes the need for US nuclear plant operators and regulators to proactively seek out new information about potential hazards. The Fukushima Daiichi accident highlighted the importance of this approach in preventing or mitigating the consequences of severe nuclear accidents.
Fires in San Diego County have burned over 10,000 acres, destroying dozens of homes and forcing tens of thousands to evacuate. Firefighters are battling the flames with assistance from military aircraft and tankers, but high temperatures and winds are making it a challenging effort.
Researchers at KAIST developed a new system for wireless power transfer with an extended range of up to 5 meters, making it possible to charge multiple devices simultaneously. The system uses a compact and scalable design with a low Q factor, achieving higher efficiency and reliability compared to previous technologies.
A new design for nuclear plants built on floating platforms could provide enhanced safety, as they would be automatically cooled by surrounding seawater in a worst-case scenario. The concept takes advantage of mature technologies and minimizes technological risks.
Researchers identified 17 microalgae and aquatic plants capable of removing radioactive contaminants, including cesium, iodine, and strontium. These plant strains could potentially be used to decontaminate highly radio-polluted water in the Fukushima area.
Scientists have identified promising new materials that can encase uranium-bearing fuel, reducing the risk of high-temperature oxidation and failure. These materials may eventually replace traditional zirconium alloys, which have been used for 50 years, if they prove safer in the event of a nuclear disaster.
The Human System Simulation Laboratory at Idaho National Laboratory is a full-scale virtual nuclear control room that tests proposed technology replacements before implementation. This facility enables scientists to improve control-room designs by studying human interactions with instruments and responses to alarms. The lab is now help...
Decommissioning of aging nuclear power plants in the US is a long, complex process with significant financial implications. The average age of the 104 nukes in the country is just 34 years, prompting concerns about the costs and safety of decommissioning these facilities.
A recent analysis of Japan fisheries data reveals that most fish caught off the northeast coast remain below seafood consumption limits, despite tightened regulations. However, highly contaminated demersal fish consistently show high levels of cesium contamination from the damaged nuclear power plant.
A Spanish research study has identified 23 nuclear power plants in Asia and beyond as being at high risk due to tsunamis, including Fukushima I. The study found that 74 reactors are located in the east and southeast of Asia, with some countries like China, Japan, South Korea, India, and Pakistan also facing significant risks.
Two studies examine the psychological status of Fukushima nuclear plant workers and residents' internal radiation exposure after the 2011 meltdown. Researchers found high rates of psychological distress and posttraumatic stress response among Daiichi plant workers, while Minamisoma residents had low levels of cesium radiation exposure.
A study projects that thermoelectric power generating capacity will decrease by 4-16% in the US and 6-19% in Europe due to lack of cooling water. This could lead to higher electricity prices, disruption to supply, and environmental impact on river ecosystems.
Scientists have developed a technology to produce hydrogen from heat in nuclear power plants, which could reduce global warming by burning only water vapor. This process is more efficient than current methods using natural gas or coal, and experts envision widespread adoption of nuclear-powered hydrogen production.
A year after the Fukushima Daiichi disaster, scientists are lacking fundamental knowledge about how nuclear fuels behave under extreme conditions. A review article calls for a long-term national research program to study this topic.
A new study finds that seismic faults close to the Fukushima Daiichi nuclear power plant have reactivated after a magnitude 9 earthquake in March. The researchers warn of a higher risk of large earthquakes disturbing the region, which could potentially cause another nuclear disaster.
A new study analyzes radioactivity from the Fukushima nuclear power plants, revealing high levels of cesium-137 and iodine-131. While the releases are not a direct threat to humans or marine life, they raise concerns about radiation accumulation in marine sediments.
Experts analyze Fukushima's current and future impact, highlighting pressing government plans and challenging nuclear energy policies. The article also explores health impacts, media coverage, and the need for upgraded safety measures to prevent similar disasters.
Researchers at Purdue University are testing the effects of fire on steel structures and nuclear power plant designs to improve fire safety. They have developed models that can be used in designs to enhance fire resistance, and their findings may lead to updates in design codes and computational building-design models.
New studies on Fukushima's aftermath might uncover more accurate estimates of health consequences of nuclear power plant accidents, including thyroid cancer risks for children and young adults. The authors also highlight the psychological burden of nuclear disasters on those affected.
The collaboration aims to provide valuable information on subjects of mutual interest while assisting Ukrainians' research efforts. The team plans to publish their findings in scholarly journals, with papers scheduled for publication in the Health Physics Journal.
The Consortium for Advanced Simulation of Light Water Reactors (CASL) uses advanced computer models to explore innovations in nuclear plant engineering and design, aiming to optimize safety and efficiency. North Carolina State University is playing a key leadership role in the program, receiving approximately $11 million in funding ove...
Richard A. Meserve has been selected to receive the 2008 Philip Hauge Abelson Prize for his remarkable career advancing science in the public interest. He is recognized for his contributions to institutions, scientific communities, and the general public, both domestically and internationally.
Researchers at MIT suggest that capturing a fraction of carbon dioxide emissions from coal-burning plants could be a near-term solution to reduce emissions and generate much-needed electricity. This approach, known as 'partial capture,' could allow the US to meet its climate goals while also demonstrating carbon capture technology.
Engineers at Lehigh University have developed a laser-based technology to detect coal ash buildup in power plants, allowing operators to make rapid adjustments. This innovation uses artificial intelligence to predict ash fusion temperatures and prevent costly downtime.
A recent study suggests that New York City faces a substantial earthquake risk due to the presence of subtle but active faults. The research indicates that magnitude 5 quakes, strong enough to cause damage, should be routinely expected every 100 years, with potentially catastrophic consequences for the densely populated area.
A holistic approach is needed to cope with freshwater needs, primarily through seawater desalination and brackish water desalination. Renewable energy sources like wind, solar, and wave power can be used in conjunction to generate electricity and reduce greenhouse gas emissions.
The CARMA database provides detailed information on power plant emissions, ranking companies by their carbon footprint. The US is the largest emitter, with Southern Co. leading the way, and Australians are among the highest per capita emitters.
A new study analyzing US nuclear reactors finds a range of electricity costs from 3 cents to 14 cents per kilowatt hour, with higher costs attributed to poor plant operation and security concerns. The study suggests that new technologies and safer reactors may not mitigate the financial risks associated with nuclear power.
Engineers at Argonne National Laboratory have developed a suite of sensors that can quickly detect chemical, biological, nuclear, and explosive materials. The sensors use millimeter/terahertz technology to identify unique spectral patterns - or fingerprints - that uniquely identify explosives and chemicals.
Researchers at Purdue University have improved nuclear reactor safety codes by enhancing their simulation capabilities. The new codes better predict what happens during severe accidents, allowing for more accurate plant designs and reduced risk of meltdowns.
The Idaho National Laboratory's (INEL) RELAP5-3D training module aims to enhance nuclear reactor safety worldwide. The five-DVD set includes a Russian translation, allowing students in countries like Slovakia and Lithuania to develop independent safety thinking.
A new virtual mockup at Penn State has shown promise in reducing construction costs by enabling more efficient scheduling. Experiments with experienced superintendents and students found that the interactive method saved up to 33% of time.
Researchers found that high-density storage systems used at nuclear power plants could unleash contamination worse than Chernobyl if attacked. The study recommends returning water tanks to low-density configurations and building onsite storage facilities to reduce the risk of fire and radiation release.
The GuardianWATCH system, developed by Lehigh University professor Terry Boult, offers several critical advantages over traditional surveillance systems. It provides real-time video footage of intruders' movements and alerts security personnel to track the situation instantly.
A study led by University of Wisconsin-Madison professor Vicki Bier found no evidence that deregulation causes widespread safety lapses in the US nuclear power industry. However, it warned that the speed of change after deregulation could create potential safety hazards, and highlighted concerns over organizational changes, rapid downs...
Researchers at Penn State have developed advanced computer techniques to improve the efficiency of nuclear and fossil fuel power plants. These new techniques can help extend the lifetime of fuel, increase operating efficiency, and save money, potentially leading to lower costs for consumers.