Passive component reliability analysis of issues relating to stoichiometric defects in glass

2006 ◽  
Author(s):  
SriRaman Kannan
Keyword(s):  
Reliability Analysis ◽  
Passive Component ◽  
Component Reliability

Degradation Susceptibility Metrics as the Bases for Bayesian Reliability Models of Aging Passive Components and Long-Term Reactor Risk

2011 ◽  
Author(s):  
Stephen D. Unwin ◽  
Peter P. Lowry ◽  
Michael Y. Toyooka ◽  
Benjamin E. Ford
Keyword(s):  
Passive Component ◽  
Degradation Mechanisms ◽  
Component Reliability ◽  
Passive Components ◽  
Reliability Models ◽  
Age Dependent ◽  
Probabilistic Risk Assessments ◽  
Component Failure Rates ◽  
Service Data

Conventional probabilistic risk assessments (PRAs) are not well-suited to addressing long-term reactor operations. Since passive structures, systems and components are among those for which refurbishment or replacement can be least practical, they might be expected to contribute increasingly to risk in an aging plant. Yet, passives receive limited treatment in PRAs. Furthermore, PRAs produce only snapshots of risk based on the assumption of time-independent component failure rates. This assumption is unlikely to be valid in aging systems. The treatment of aging passive components in PRA does present challenges. First, service data required to quantify component reliability models are sparse, and this problem is exacerbated by the greater data demands of age-dependent reliability models. A compounding factor is that there can be numerous potential degradation mechanisms associated with the materials, design, and operating environment of a given component. This deepens the data problem since the risk-informed management of materials degradation and component aging will demand an understanding of the long-term risk significance of individual degradation mechanisms. In this paper we describe a Bayesian methodology that integrates the metrics of materials degradation susceptibility being developed under the Nuclear Regulatory Commission’s Proactive Materials Degradation Assessment Program with available plant service data to estimate age-dependent passive component reliabilities. Integration of these models into conventional PRA will provide a basis for materials degradation management informed by the predicted long-term operational risk.

scholarly journals Temperature Verification of Hybrid Microelectronic Circuit Design

1983 ◽  
Vol 10 (2-3) ◽  
pp. 63-66 ◽  
Author(s):  
Sedat Širbegovic ◽  
Milan Mazalica ◽  
Ratko Krcmar
Keyword(s):  
Temperature Measurement ◽  
Reliability Analysis ◽  
Circuit Design ◽  
Hot Spots ◽  
Critical Component ◽  
Critical Temperatures ◽  
Component Reliability ◽  
Measurement Results ◽  
Infrared Microscope ◽  
Banja Luka

The paper includes temperature measurement results on hybrid microelectronic circuit surfaces carried out by infrared microscope with special attention to critical temperatures (hot spots) which may require hybrid microelectronic circuit redesign. Critical component reliability analysis, as well as the need for replacement with more reliable components is considered. The principle for hybrid microelectronic design verification suggested.The paper is the result of longterm efforts at the Rudi Čajavec Factory in Banja Luka, where we have been investigating the possibilities for very reliable hybrid microelectronic circuit design.

scholarly journals Reliability Analysis of Resultant Stress for Unsymmetrical Columns for Stress Follow Exponential Distribution

2019 ◽  
Vol 8 (6S3) ◽  
pp. 1334-1337
Keyword(s):  
Tensile Stress ◽  
Reliability Analysis ◽  
Compressive Stress ◽  
Probabilistic Approach ◽  
Bending Stress ◽  
Maximum Compressive Stress ◽  
Eccentric Load ◽  
Component Reliability ◽  
Parameter Values ◽  
Resultant Stress

When a body is subjected to eccentric loads, the direct stress as well as bending stress is produced. Resultant stress is obtained by adding these two stresses. In this paper, probabilistic approach has been made for designing the structure of unsymmetrical column by finding suitable parameters length of outer square and length of a hole and eccentric load of the column to get the specified reliability of the structure of a body or component. Reliability analysis has been done at the point of maximum compressive stress occurred and at the point of minimum tensile stress occurred. Reliability computations have been obtained for changing the various parameter values. It is observed from the computations that Reliability of the component when compressive stress occurs at the edge AB increases with increasing of length of outer square, decrease of load, decrease of length of hole and increasing of eccentricity. Reliability of the component when tensile stress occurs at the edge CD increases with decrease of length of outer square increasing the length of a hole, decreases the load and decrease of eccentricity

scholarly journals RELIABILITY OF EC 155 B1 AIRCRAFT COMPONENTS USING UPPER CONTROL LIMIT (ALERT LEVEL) FORMULATION

Vortex ◽  
2021 ◽  
Vol 1 (2) ◽  
pp. 49
Author(s):  
Ramadhan Adil Labib
Keyword(s):  
Reliability Analysis ◽  
Control Program ◽  
Air Transport ◽  
Main Rotor ◽  
Analysis Method ◽  
Critical System ◽  
Component Reliability ◽  
Reliability Control ◽  
Aircraft System ◽  
Control Limits

To provide a reliability and service from PT. Indonesia Air Transport & Infrastructure, operators have to make sure the condition of all the systems and the components of EC 155 B1 is serviceable. However, there is still a bunch of unusual repetitive defect that recorded and mostly it came from the most critical system that can occur an incident at any time. In this study discussed on EC 155 B1’s component Reliability Analysis Method Using Reliability Control Program (RCP), Reliability Control Program is the reliability of aircraft system by determining which component that has to be concern by define the Upper Control Limits (Alert Value). From the calculation of RCP, ATA Chapter 62 Main Rotor is the most defected.

Reliability Analysis for the Navstar Based on State Probability of the Constellation

2014 ◽  
Vol 556-562 ◽  
pp. 3523-3526
Author(s):  
Hong Tao Hou ◽  
Fei Xie ◽  
Qun Li ◽  
Qiang Chang ◽  
Wang Xun Zhang
Keyword(s):  
Reliability Analysis ◽  
Markov Processes ◽  
Navigation System ◽  
The State ◽  
State Probability ◽  
Component Reliability ◽  
Mapping Model ◽  
Model Based

The definition for the constellation availability of the navigation system is given firstly, and then calculates the availability of a single satellite by using Markov processes, and establishes the model based on the state probability of the constellation, to achieve mapping model from component reliability of the single satellite to the constellation availability. Finally, we analysis the regional availability performance of the GNSS by the algorithm, which can fit and satisfy the requirements of contradiction between accuracy and rapidity for analysis of availability for constellation of GNSS.

Component Reliability Analysis

2016 ◽  
pp. 75-172
Author(s):  
Mohammad Modarres ◽  
Mark P. Kaminskiy ◽  
Vasiliy Krivtsov
Keyword(s):  
Reliability Analysis ◽  
Component Reliability
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