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The Mission of the Robotics and Remote Systems Division is to promote the development and application of immersive simulation, robotics, and remote systems for hazardous environments for the purpose of reducing hazardous exposure to individuals, reducing environmental hazards and reducing the cost of performing work.
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2024 ANS Annual Conference
June 16–19, 2024
Las Vegas, NV|Mandalay Bay Resort and Casino
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The Standards Committee is responsible for the development and maintenance of voluntary consensus standards that address the design, analysis, and operation of components, systems, and facilities related to the application of nuclear science and technology. Find out What’s New, check out the Standards Store, or Get Involved today!
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Latest News
Framatome signs contracts with Sizewell C
French nuclear developer Framatome is slated to deliver key equipment for Sizewell C Ltd.’s two large reactors planned for the United Kingdom’s Suffolk coast.
The agreement, reportedly worth multiple billions of euros, was announced this week and will involve Framatome from the design phase until commissioning. The company also agreed to a long-term fuel supply deal. Framatome is 80.5 percent owned by France’s EDF and 19.5 percent owned by Mitsubishi Heavy Industries.
Anil Kumar Sharma, Sanjay Kumar Das, J. Harvey
Nuclear Technology | Volume 165 | Number 1 | January 2009 | Pages 43-52
Technical Paper | Thermal Hydraulics | doi.org/10.13182/NT09-A4061
Articles are hosted by Taylor and Francis Online.
In the Prototype Fast Breeder Reactor, a core catcher is provided as an in-vessel core debris retention device to collect, support, and maintain in subcritical configuration the relocated core debris generated from fuel melting as a consequence of a severe accident scenario. It acts as a barrier to prevent settling of debris onto the main vessel and helps to maintain the main vessel temperature within acceptable creep range. In the Safety Engineering Division of the Indira Gandhi Center for Atomic Research, model experiments are carried out in water using a geometrically similar model to understand natural convective heat transfer and fluid flow in and around the core catcher below the grid plate. Influences of cylindrical and annular central openings (chimney) through the core catcher assembly are investigated to assess their relative thermal performances. Resistive heating elements are used as heat source to simulate debris decay heat on the core catcher. Series of experiments were carried out with both configurations. Temperatures were monitored at critical positions and compared with numerical evaluation. Flow fields and isotherms are analyzed with a computational model to understand the fluid flow and heat transfer characteristics inside the cavity along with experimental data for specified steady-state temperatures on the heat source plate. Numerical results are found to be in good agreement with those obtained from the experiments. The combined efforts of numerical and experimental work conclude that core catcher assembly with annular chimney is better in terms of natural convection heat removal capability.