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Showing 1 to 20 of 42 for “"probabilistic risk assessment"”.
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Probabilistic risk assessment of system-level radiation effects
… analysis is performed using a time-dependent Probabilistic Risk Assessment (PRA) methodology. Data-driven models for the expected behavior of radiation-sensitive parts are instanced in a system model for Fault Tree Analysis (FTA). The system model is then solved using Bayesian Networks and …
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Probabilistic risk assessment of railroad train adjacent track accidents
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2021-05-01
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Incorporating flow-accelerated corrosion effects into probabilistic risk assessment
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Nuclear Engineering, 1998.
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Applying Probabilistic Risk Assessment to Agricultural Nonpoint Source Pollution
A probabilistic risk assessment (PRA) for the discharge of excessive nitrogen from nonpoint sources (NPSs) to a stream was performed for a small agricultural watershed in northern Virginia. Risk, by definition, is the product of the frequency of occurrence of an event and the consequences of that …
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Petri net modeling of fault analysis for probabilistic risk assessment
… accepted as the modeling strategy to perform Probabilistic Risk Assessment (PRA). However, there are several limitations associated with fault tree/event tree modeling. These include 1. It only considers binary events; 2. It assumes independence among basic events; and 3. It does not consider …
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Incorporation of Corrosion Mechanisms into a State-dependent Probabilistic Risk Assessment
… 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 role in determining plant risk, research and industry experience have shown that degradation …
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Artificial Neural Network and Dynamic Probabilistic Risk Assessment for passive safety systems
… of Artificial Neural Networks (ANNs) and Dynamic Probabilistic Risk Assessment (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 …
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Factors affecting probabilistic risk assessment of transportation of hazardous material by rail
… high importance. The approach to minimize this risk varies based on the type of material being transported. This thesis focuses on a comparison of risk analysis, risk perception, and regulation of highly radioactive material (spent nuclear fuel / high level radioactive waste) and flammable …
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Theorizing and quantifying organizational and social factors in probabilistic risk assessment of complex systems
… power, aviation, oil and gas, and healthcare. Probabilistic Risk Assessment (PRA) is a formal methodology for estimating risk emerging from the interactions of equipment failure and human error. This research is the product of a line of a collaborative study to theorize and quantify the …
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Development and application of a probabilistic risk assessment model for evaluating advanced train control technologies
Quantitative research on risk and train control has traditionally relied exclusively on historical accident data. In this thesis, a model is developed that enables a probabilistic rather than statistical assessment of safety improvements achieved with advanced train control technologies. This …
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Failure record discounting in Bayesian analysis in Probabilistic Risk Assessment (PRA) : a space system application
… binomial probability of failure on demand in Probabilistic Risk Assessment (PRA), the corresponding number of observed failures may be not directly applicable due to design or procedure changes that have been implemented in the system as a result of past failures. A methodology has been …
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Multi-hazard integrated probabilistic risk assessment framework for seismically induced internal flooding in nuclear power plants
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2025-12-01
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Enhancing spatiotemporal resolution in probabilistic risk assessment of nuclear power plants: theoretical foundations and methodological developments
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2024-05-01
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Integrated probabilistic risk assessment (I-PRA) methodology and computational platform for fire PRA of nuclear power plants
Probabilistic Risk Assessment (PRA) is a systematic methodology to estimate risk in complex technological systems. PRA has been utilized by both the nuclear industry and the U.S. Nuclear Regulatory Commission (NRC) to enhance Nuclear Power Plant (NPP) safety. In resolving emergent regulatory …
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Temporal coupling of maintenance human performance, physical degradation, and digital twin models for probabilistic risk assessment in nuclear power plants
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2027-08-01
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The need for a probabilistic risk assessment of the oil tanker industry and a qualitative assessment of oil tanker groundings
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 1996.
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Methodologies to strategize the utilization of modeling and simulation for probabilistic risk assessment (PRA) of nuclear power plants: Applications in fire PRA
Based on the literature, one way to conceptualize risk is: Risk={A,C,P_f^*,P(P_f^* ) | U^',K}, where A represents events including initiating events and scenarios; C denotes the consequences of these events (A); P_f^* stands for the estimated frequency of occurrences of events A; P(P_f^* ) is a …
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Integrating geographic information systems with the Level 3 Probabilistic Risk Assessment of nuclear power plants to advance modeling of socio-technical infrastructure in emergency response applications
… social and organizational factors into Level 1 Probabilistic Risk Assessment (PRA) has been theoretically and methodologically improved and now is in the process of development for Nuclear Power Plant (NPPs) applications. The goal of this study is to initiate the same paradigm of research for …
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Hybrid Causal Logic Methodology for Risk Assessment
Probabilistic Risk Assessment is being increasingly used in a number of industries such as nuclear, aerospace, chemical process, to name a few. Probabilistic Risk Assessment (PRA) characterizes risk in terms of three questions: (1) What can go wrong? (2) How likely is it? (3) What are the …
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On the quantification of safety margins
… not be quantified. The subsequent development of Probabilistic Risk Assessment (PRA) has provided the analytical tools that allow the quantification of uncertainties associated with accident initiation and progression. But, while the impact of redundancy has been explicitly modeled and quantified, …
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