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Showing 1 to 12 of 12 for “"Passive safety systems"”.
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Artificial Neural Network and Dynamic Probabilistic Risk Assessment for passive safety systems
… (DPRA) as advanced methodologies for the safety assessment of passive safety systems, particularly in mitigating Loss of Coolant Accidents (LOCAs). While using the BWRX-300 SMR, the study highlights the broader applicability of these techniques to enhance traditional Probabilistic Safety …
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The impact of passive safety systems on desirability of advanced light water reactors
… the advanced light water reactor designs with passive safety systems are more desirable than advanced reactor designs with active safety systems from the point of view of uncertainty in the performance of safety systems as well as the economic implications of the passive safety systems. Two …
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Dynamic fuzzy reliability and safety assessment of passive safety systems in small modular reactors
… advantage associated with SMRs is their improved safety, which is expected to be accomplished by integrating a wide range of novel design elements, such as Passive Safety Systems (PSS) and components. Passive safety systems rely on natural processes rather than active intervention, hence …
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Methods for comparative assessment of active and passive safety systems with respect to reliability, uncertainty, economy, and flexibility
Passive cooling systems sometimes use natural circulation, and they are not dependent on emergency AC power or offsite power, which can make designs simpler through the reduction of emergency power supplying infrastructure. The passive system approach can lead to substantial simplification of the …
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Experimental investigations of natural circulation in a separate-and-mixed effects test facility mimicking prismatic modular reactor (PMR) core
… (PMRs). Natural circulation is employed as a passive safety feature that passively removes the decay heat released after the loss of flow accidents (LOFA). Several computational studies have addressed such phenomena, however, validation of Computational Fluid Dynamics (CFD) is needed by …
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Incorporation of Corrosion Mechanisms into a State-dependent Probabilistic Risk Assessment
… power plants and an increased interest in passive safety systems in Generation III+ and small modular reactors has brought a new focus in probabilistic risk assessment (PRA) to the treatment of passive systems, structures and components (SSCs). Although previously thought to play a lesser …
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Dynamic accident sequence analysis using dynamic flowgraph method and Markov/cell-to-cell mapping technique
… and adequacy of classical probabilistic safety assessment (PSA) techniques (fault/event tree) to account for dynamic system interactions and time-dependent accident sequence evolution. Subsequently there is an interest within the PSA community to complement the classical techniques with …
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Residual Crashes and Injured Occupants with Lane Departure Prevention Systems
… lane of travel. Lane departure warning (LDW) systems track the vehicle lane position and can alert the driver through audible and haptic feedback before the vehicle crosses the lane line. Lane departure prevention (LDP) systems can perform an automatic steering maneuver to prevent the …
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Air Ingress and Heat-Driven Flow Relaminarization in a Very High Temperature Reactor (VHTR)
… gaseous coolants, VHTRs also display benefits of passive safety systems including intra-core natural circulation for heat removal in accident scenarios. However, a number of substantial engineering challenges are expected in VHTRs, and due to the high temperatures of the coolant involved, material …
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LEU+ Fuel Cycle Investigation of the BWRX-300 Design Using Neutronic and Two-Phase Thermal Hydraulic Analyses
… upfront capital cost, scalability, and enhanced safety features. Of SMR concepts, General Electric Hitachi Nuclear Energy’s (GEH) BWRX-300 design is one of the most promising, with several countries strongly considering its viability. The BWRX-300 is a 300 MWe boiling water reactor (BWR) …
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Development of optimized core design and analysis methods for high power density BWRs
… cost to the 18 month ABWR fuel cycle. The plant systems outside the vessel are assumed to be the same as the ABWR-1I design, utilizing a combination of active and passive safety systems. Safety analyses applied a void reactivity coefficient calculated by SIMULATE-3 for an equilibrium cycle core …
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Capital cost evaluation of advanced reactor designs under uncertainty and risk
… modularization, intra-plant learning rates, passive safety, advanced construction, and advanced manufacturing in their endeavor to lower capital costs. This thesis systematically analyzes the cost saving potential of these strategies for eight unique reactor architectures. The aim was to …