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RISInvestigations on Effect of Lift and Wall Lubrication Forces on the Subcooled Flow Boiling
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Subcooled flow boiling is widely used as a mode of heat transfer in many industries, especially in nuclear reactors. Despite its advantages, the heat transfer is hampered beyond a certain flux due to a phenomenon known as ...
Simulation of the Performance of the Venturi Scrubber for an Advanced Reactor Containment Venting Conditions
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Post Fukushima, nuclear plants are being retrofitted with severe accident mitigation measures. For attaining depressurization of the containment and mitigate the consequences of the release of the radioactivity to the ...
Experimental Evaluation of Two-Phase Heat Transfer Coefficient Under Oscillatory Flow Conditions and Correlation Development
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Natural circulation boiling water reactors (NCBWRs) are prone to flow instabilities. Due to instabilities, heat transfer deteriorates. However, the extent to which the heat transfer coefficient (HTC) deteriorates is not ...
Experimental Investigation of Melt Coolability Behavior in an ExVessel Core Catcher: The Effect of Flooding Time
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Some of the advanced nuclear reactors employ an exvessel core catcher to mitigate core melt scenarios by stabilizing and cooling the corium for a prolonged period by strategically flooding it. The side indirect cooling ...
Evaluation of Dump Tank Coolability in PHWRs During Late-Phase Severe Accident
Publisher: American Society of Mechanical Engineers (ASME)
Abstract: In some of the older design of pressurized heavy water reactors (PHWRs), such as in Rajasthan Atomic Power Station (RAPS) and Madras Atomic Power Station (MAPS), in case of a severe accident, the debris/corium may cause ...
Experimental Investigation of Melt Coolability and Ablation Behavior of Oxidic Sacrificial Material at Prototypic Conditions in Scaled Down Core Catcher
Publisher: American Society of Mechanical Engineers (ASME)
Abstract: To minimize the potential risk of design extension conditions (DEC) with core meltdown, some advanced reactors employ ex-vessel core catchers which stabilize and cool the corium for prolonged period by strategically flooding ...
Study on Melt Coolability and Water Ingression Through Melt Pool in Scaled Down Core Catcher—The Influence of Vessel Angle
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: An ex-vessel core catcher is generally used in advanced reactors to mitigate core melt scenarios by stabilizing and cooling the corium for prolonged period by strategically flooding it. The side indirect cooling along with ...
Retention of Molten Corium in Calandria Vessel of PHWR With Moderator Drain Pipe
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Retention of molten corium inside calandria vessel is crucial for arresting accident progression in pressurized heavy water reactors (PHWRs) during severe accidents. Our earlier tests have demonstrated corium retention and ...