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Fukishima reactor meltdown9/4/2023 ![]() “ discovered a new type of radioactive particle 3.9 km north northwest of the Fukushima Daiichi Nuclear Power Plant, which has the highest caesium-134 and caesium-137 activity yet documented in Fukushima, 10 5–10 6 Bq per particle,” Utsunomiya says.Īlongside the record-breaking radioactivity seen in two of the particles (6.1×10 5 and 2.5×10 6 Bq, after correction to the date of the accident) the team also found that they had characteristic compositions and textures that differed from those previously seen in the reactor unit 1 fall-out. In their study, chemist and environmental scientist Satoshi Utsunomiya of Japan’s Kyushu University and colleagues have analyzed 31 of these particles, which were collected from surface soil taken from roadsides in radiation hotspots. These particles were found to have been deposited in a narrow zone stretching around 8 km north-northwest from the reactor site. Recent studies have revealed that the fall-out from reactor unit 1 also included larger caesium-bearing particles, each greater than 300 micron in diameter, which have higher levels of activity in the order of 10 5 Bq per particle. The result was a series of nuclear meltdowns and hydrogen explosions that released a large amount of radioactive material into the surrounding environment - including microparticles rich in radioactive caesium that reached as far Tokyo, 225 km away. Breaching sea defences, the water from the wave shut down emergency generators that were cooling the reactor cores. This year marks the tenth anniversary of the Fukushima Daiichi disaster, which occurred as a result of a powerful earthquake that struck off of Japan’s east coast, generating a tsunami that reached some 14 m high when it reached the nearby shoreline. Webinars Tune into online presentations that allow expert speakers to explain novel tools and applications.Video Watch our specially filmed videos to get a different slant on the latest science.Podcasts Our regular conversations with inspiring figures from the scientific community.Audio and video Explore the sights and sounds of the scientific world.Supercool physics Experiments that probe the exotic behaviour of matter at ultralow temperatures depend on the latest cryogenics technology.The science and business of space Explore the latest trends and opportunities associated with designing, building, launching and exploiting space-based technologies.Revolutions in computing Find out how scientists are exploiting digital technologies to understand online behaviour and drive research progress.Nanotechnology in action The challenges and opportunities of turning advances in nanotechnology into commercial products.#BlackInPhysics Celebrating Black physicists and revealing a more complete picture of what a physicist looks like.Artificial intelligence Explore the ways in which today’s world relies on AI, and ponder how this technology might shape the world of tomorrow.Collections Explore special collections that bring together our best content on trending topics.Innovation showcases A round-up of the latest innovation from our corporate partners.Projects and facilities Follow the latest progress at the world’s top scientific experiments.Policy and funding Understand how emerging policy changes could affect your work and career.Education and outreach Learn about novel approaches to educating and inspiring the scientists of the future.Business and innovation Find out how recent scientific breakthroughs are driving business innovation and commercial growth.Impact Explore the value of scientific research for industry, the economy and society.Personalities Find out who’s doing what in industry and academia.Interviews Discover the views of leading figures in the scientific community.Opinion and reviews Find out whether you agree with our expert commentators.Careers Consider your career options with valuable advice and insightful case studies.People Meet the people behind the science.Events Plan the meetings and conferences you want to attend with our comprehensive events calendar.Blog Enjoy a more personal take on the key events in and around science.Analysis Discover the stories behind the headlines.Features Take a deeper look at the emerging trends and key issues within the global scientific community. ![]() News Stay informed about the latest developments that affect scientists in all parts of the world.Research updates Keep track of the most exciting research breakthroughs and technology innovations.Latest Explore all the latest news and information on Physics World.
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