In 2009 the chairman of the Indian Atomic Energy Commission said that India has a "long-term objective goal of becoming energy-independent based on its vast thorium resources to meet India's economic ambitions.". As of July 2013 the major equipment of the PFBR had been erected and the loading of "dummy" fuels in peripheral locations was in progress. The liquid fluoride thorium reactor ( LFTR; often pronounced lifter) is a type of molten salt reactor. , Because the operator did not expect the decision to decommission the facility, the plant was put into "safe enclosure" status, given that this was the only technical solution for fast decommissioning, especially in consideration of the lack of a final storage facility.. THTR-300 was only in full service for 423 days.  Estimates to complete a reactor were originally set at ten years in 2006 (with a proposed operational date of 2015).. The German THTR-300 was a prototype commercial power station using thorium as fertile and highly enriched U-235 as fissile fuel. , In Britain, one organisation promoting or examining research on thorium-based nuclear plants is The Alvin Weinberg Foundation. "In the past, the government was interested in nuclear power because of the energy shortage. This … 1 ways to abbreviate Thorium High-temperature Reactor. The THTR-300 was a helium-cooled high-temperature reactor with a pebble-bed reactor core consisting of approximately 670,000 spherical fuel compacts each 6 centimetres (2.4 in) in diameter with particles of uranium-235 and thorium-232 fuel embedded in a graphite matrix. , A report by the Bellona Foundation in 2013 concluded that the economics are quite speculative. "We have huge reserves of thorium. The 300 MWe Thorium High Temperature Reactor (THTR)at Hamm-Uentrop in Germany operated with thorium-HEU fuel between 1983 and 1989, when it was shut down due to technical problems. The THTR-300 was a thorium high-temperature nuclear reactor rated at 300 MW electric (THTR-300) in Hamm-Uentrop, Germany. It is therefore an important and potentially viable technology that seems able to contribute to building credible, long-term nuclear energy scenarios. According to Dr. Shamanin, the blanket was based on a concept of a multi-purpose high-temperature gas-cooled low-power reactor fueled by thorium. Reactor, Pebble, Thorium. September 2013, "The present state of the HTR concept based on experience gained from AVR and THTR", "Decommissioning of the thorium high temperature reactor (THTR 300)", "74/295/Euratom: Council Decision of 4 June 1974 on the establishment of the Joint Undertaking Hochtemperatur- Kernkraftwerk GmbH (HKG)", http://www.wa.de/lokales/hamm/uentrop/thtr-milliardengrab-hamm-uentrop-wird-jahre-3099260.html, Cooling Tower of the Schmehausen Nuclear Plant, The THTR steam generator: design, manufacture and installation, Gas-cooled reactor safety and licensing aspects, THTR steam generator licensing experience as seen by the manufacturer, Accident analysis and accident control for the THTR - 300 power plant, Aspects of water and air ingress accidents in HTRs, Safety concept of high-temperature reactors based on the experience with AVR and THTR, The behaviour of spherical HTR fuel elements under accident conditions, Single European Sky Air Traffic Management Research, Schnell-Brüter- Kernkraftwerksgesellschaft mbH' (SBK), https://en.wikipedia.org/w/index.php?title=THTR-300&oldid=993915943, Joint undertakings of the European Union and European Atomic Energy Community, Nuclear power stations with closed reactors, Infobox mapframe without OSM relation ID on Wikidata, Nuclear power station articles using Infobox power station, Articles with German-language sources (de), Wikipedia articles with WORLDCATID identifiers, Creative Commons Attribution-ShareAlike License, This page was last edited on 13 December 2020, at 04:27. The challenge is to develop technology for converting this to fissile material," stated their former Chairman of India's Atomic Energy Commission. In 2014, the Generation IV international forum confirmed the Very High Temperature Reactor (VHTR) as one of 6 promising reactor technologies that should be pursued in order to develop advanced reactors suitable for deployment in the 2030’s. However, development of thorium power has significant start-up costs. Reactor . The Molten Salt Fast Neutron Reactor (MSFR), which will take in thorium fuel cycle, recycling of actinides, closed Th/U fuel cycle with no U enrichment, with enhanced safety and minimal wastes. Uranium reactors had already been established, and Hyman Rickover, de facto head of the US nuclear program, wanted the plutonium from uranium-powered nuclear plants to make bombs. It was decided to shut down THTR-300. Estimated Additional Reserves REMOTE. By 1992, a group of firms planned to proceed with construction of a HTR-500, the successor of the THTR-300, but up-rated to a thermal output of 1250 megawatts and an electrical output of 500 megawatts. Suitability: Thorium can be used a nuclear fuel in several types of nuclear reactors that include heavy water reactors, high-temperature gas-cooled reactors, boiling (light) water reactors, pressurised (light) water reactors, fast neutron reactors, molten salt … But it was apparent to me that my style, my attitude, and my perception of the future were no longer in tune with the powers within the AEC.. Category: Reactor Designs, Technology, Thorium. The original cost of the project was Rs. The irradiation would then make uranium-233 in lieu of uranium-232 for use in nuclear weapons—making thorium into a dual purpose fuel. The preceding figures are reserves and as such refer to the amount of thorium in high-concentration deposits inventoried so far and estimated to be extractable at current market prices; millions of times more total exist in Earth's 3×1019 tonne crust, around 120 trillion tons of thorium, and lesser but vast quantities of thorium exist at intermediate concentrations. On September 1, 1989, the THTR-300 was deactivated due to its rising cost; in August 1989, the THTR company almost bankrupted after a long period of shut down due to broken components in the hot gas duct. Thorium is three times as abundant as uranium and nearly as abundant as lead and gallium in the Earth's crust. The economic study for the advanced nuclear reactors of the fourth generation fuelled with thorium, e.g. A small modular nuclear reactor to replace coal plants could be on the market within 5 years. For this reactor, various design options as regards fuel configurations, such as prismatic bed and pebble bed were considered for thermal hydraulics and temperature dsitrbi utoi n anaylssi. https://www.nextbigfuture.com/2019/09/p3tek-recommends-thorcon-molten-salt-nuclear-reactor-for-indonesia.html, In May 2010, researchers from Ben-Gurion University of the Negev in Israel and Brookhaven National Laboratory in New York began to collaborate on the development of thorium reactors, aimed at being self-sustaining, "meaning one that will produce and consume about the same amounts of fuel," which is not possible with uranium in a light water reactor. 4.30) is a further step in the evolutionary development of high-temperature reactors (HTRs). :13 Moir and Teller estimated in 2004 that the cost for their recommended prototype would be "well under $1 billion with operation costs likely on the order of $100 million per year," and as a result a "large-scale nuclear power plan" usable by many countries could be set up within a decade. According to, There is much less nuclear waste when thorium is used as a fuel in a, According to Moir and Teller, "once started up [it] needs no other fuel except thorium because it makes most or all of its own fuel.". According to Chemical & Engineering News, "most people—including scientists—have hardly heard of the heavy-metal element and know little about it...," noting a comment by a conference attendee that "it's possible to have a Ph.D. in nuclear reactor technology and not know about thorium energy. , At the 2011 annual conference of the Chinese Academy of Sciences, it was announced that "China has initiated a research and development project in thorium MSR technology. ", "UK Moltex seeks to deploy its Stable Salt Reactor in Canada", Initiates Thorium MSR Project « Energy from Thorium, "China Takes Lead in Race for Clean Nuclear Power", "The U.S. government lab behind China's nuclear power push", "Watch replay of nuclear’s future, with dash of rare earth, political intrigue", "Chinese scientists urged to develop new thorium nuclear reactors by 2024", "Candu Signs Expanded Agreement with China to Further Develop Recycled Uranium and Thorium Fuelled CANDU Reactors", https://sg.news.yahoo.com/amphtml/china-hopes-play-leading-role-220307940.html, "The Thing About Thorium: Why The Better Nuclear Fuel May Not Get A Chance", "Design of World's first Thorium based nuclear reactor is ready", Energy policy of India#Power Generation capacity in India, "Considering an Alternative Fuel for Nuclear Energy", "First commercial fast reactor nearly ready", "How Homi Bhabha's vision turned India into a nuclear R&D leader", "A future energy giant? As was determined in 1989, dismantling would begin after approximately 30 years in safe enclosure.. The heat source is based on a fuel technology with intrinsic safety characteristics. 80 incidents were logged in its short lifetime. However, if thorium-based power plants were adopted on a large-scale, virtually all the world's thorium requirements could be supplied simply by refining monazites for their more valuable REEs. The Steenkampskraal Thorium Limited (STL) high temperature modular reactor (HTMR) is a Generation IV 100 MW helium-cooled power plant that features a thorium-based fuel cycle. Producing Thorium pebbles for the High-Temperature Gas-Cooled Reactor (HTGR). During that period, the government of the United States also built an experimental molten salt reactor using U-233 fuel, the fissile material created by bombarding thorium with neutrons. The THTR-300's power conversion system was similar to the Fort St. Vrain reactor in the USA, in that the reactor coolant transferred the reactor core's heat to water. It started operating in 1983, synchronized with the grid in 1985, operated at full power in February 1987 and was shut down September 1, 1989. , In early 2012, it was reported that China, using components produced by the West and Russia, planned to build two prototype thorium MSRs by 2015, and had budgeted the project at $400 million and requiring 400 workers. Proponents also cite the low weaponization potential as an advantage of thorium due to how difficult it is to weaponize the specific uranium-233/232 and plutonium-238 isotopes produced by thorium reactors, while critics say that development of breeder reactors in general (including thorium reactors, which are breeders by nature) increases proliferation concerns. Science writer Richard Martin states that nuclear physicist Alvin Weinberg, who was director at Oak Ridge and primarily responsible for the new reactor, lost his job as director because he championed development of the safer thorium reactors. They estimated the reactor could function without an operator for 120 days. This Reactor can facilitate a variety of different fuels using the same geometry. This irradiation process may be altered slightly by removing protactinium-233. Over half of its 674,000 pebbles cont… 153–63. The THTR-300 served as a prototype high-temperature reactor (HTR) to use the TRISO pebble fuel produced by the AVR, an experimental pebble bed operated by VEW. It is difficult to make a practical nuclear bomb from a thorium reactor's byproducts. LFTRs use the thorium fuel cycle with a fluoride -based, molten, liquid salt for fuel. Though named thorium high temperature reactor, mostly U-235 was fissioned. In 2013 India's 300 MWe AHWR (pressurized heavy water reactor) was slated to be built at an undisclosed location. , Delays have since postponed the commissioning [criticality?] Some experts note possible specific disadvantages of thorium nuclear power: Research and development of thorium-based nuclear reactors, primarily the Liquid fluoride thorium reactor (LFTR), MSR design, has been or is now being done in the United States, United Kingdom, Germany, Brazil, India, China, France, the Czech Republic, Japan, Russia, Canada, Israel, Denmark and the Netherlands. The pebble bed thorium high-temperature reactor THTR 300 was shut down on September 1, 1989, after > 16 000 h operation time. , Moir and Teller agree, noting that the possible advantages of thorium include "utilization of an abundant fuel, inaccessibility of that fuel to terrorists or for diversion to weapons use, together with good economics and safety features … " ", CANDU reactors are capable of using thorium, and Thorium Power Canada has, in 2013, planned and proposed developing thorium power projects for Chile and Indonesia. Thorium is a metal with radioactive properties that has the symbol Th and the atomic number 90 in the periodic table, and can be used as nuclear fuel in power plants to generate clean electricity. In 1968, Nobel laureate and discoverer of plutonium, Glenn Seaborg, publicly announced to the Atomic Energy Commission, of which he was chairman, that the thorium-based reactor had been successfully developed and tested. The THTR-300 was a thorium high-temperature nuclear reactor rated at 300 MW electric (THTR-300) in Hamm-Uentrop, Germany. “Thorium reactors are safe” Wrong. Lower Production of Transuranic Elements. Thorium-based nuclear power generation is fueled primarily by the nuclear fission of the isotope uranium-233 produced from the fertile element thorium. Meaning; PWR.  That vision of using thorium in place of uranium was set out in the 1950s by physicist Homi Bhabha.  The design envisages a start up with reactor grade plutonium that breeds U-233 from Th-232. In 1973, however, the US government settled on uranium technology and largely discontinued thorium-related nuclear research. ", After studying the feasibility of using thorium, nuclear scientists Ralph W. Moir and Edward Teller suggested that thorium nuclear research should be restarted after a three-decade shutdown and that a small prototype plant should be built.. This collaboration will initially focus on SINAP’s Thorium Molten Salt Reactor—Solid Fuel 1 (TMSR-SF1). The thermal output of the core was 750 megawatts; heat was transferred to the helium coolant, which then transported its heat to water, which then was used to generate electricity via a Rankine cycle. The remaining facility was "safely enclosed". Supervisor: Prof E Mulder, Post-Graduate School of Nuclear Science and Engineering. " That same month it was reported that the US Department of Energy is "quietly collaborating with China" on thorium-based nuclear power designs using an MSR. India has projected meeting as much as 30% of its electrical demands through thorium by 2050. I was speechless. The reasons were that uranium-fueled reactors were more efficient, the research was proven, and thorium's breeding ratio was thought insufficient to produce enough fuel to support development of a commercial nuclear industry. On May 4, 1986, just 6 months after it had been connected to the power grid, a fuel pebble became lodged in a fuel feed pipe to the reactor core.  India's first commercial fast breeder reactor—the 500 MWe Prototype Fast Breeder Reactor (PFBR)—is approaching completion at the Indira Gandhi Centre for Atomic Research, Kalpakkam, Tamil Nadu. Thorium High-temperature Reactor Reactor, Pebble, Thorium. These were similar to the reactor designs that produced material for nuclear weapons. The waste heat from the THTR-300 was exhausted using a dry cooling tower. Despite the documented history of thorium nuclear power, many of today's nuclear experts were nonetheless unaware of it. World monazite resources are estimated to be about 12 million tons, two-thirds of which are in heavy mineral sands deposits on the south and east coasts of India. 5,677 crore. Increasingly shunted aside, Weinberg was finally forced out in 1973.. Raluca presents the Pebble-Bed Advanced High Temperature Reactor (PB-AHTR), a Fluoride Salt Cooled High Temperature Reactor (FHR) designed by University of California (Berkeley) & ORNL & other universities. American Geophysical Union, Fall Meeting 2007, abstract #V33A-1161. India is the "only country in the world with a detailed, funded, government-approved plan" to focus on thorium-based nuclear power.  Heinz Riesenhuber, Federal Secretary of Research at that time, inaugurated it, and it first went critical on September 13, 1983. Title: Article - Decommissioning of the Thorium High Temperature Reactor (THTR 300) by G, Dietrich, W Neumann and N. Rohl. , The primary fuel of the proposed HT3R research project near Odessa, Texas, United States, will be ceramic-coated thorium beads. 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