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Title: Failure Rate Estimates for Passive Mechanical Components

Abstract

Fusion design projects that reach the stage of design reviews typically require reliability, availability, maintainability and inspectability (RAMI) assessments. While many kinds of reliability and maintainability data are needed for a wide variety of fusion components to quantify a RAMI assessment, one of the types of components requiring data is the passive mechanical component. Passive mechanical components can be items such as metal plates, rods, shafts, brackets, bolts, and other items. Generally these passive components tend to have low failure rates since they are simple designs, have no or few moving parts, and do not need control signals to perform their design function. However, there are no widely recognized datasets for such components, so analysts must use multiple datasets and judgment for failure rates. This report gives recommended failure rates for various failure modes of these components, and gives suggested failure rate multipliers to apply to these failure rates if they reside in harsh environments. If the component resides far from the tokamak then typical industrial failure rates would suffice. Components near the tokamak find conditions can be demanding; similar to those in a fission reactor containment building. Some component failure rates can be modified if the components reside insidemore » the tokamak.« less

Authors:
ORCiD logo [1]
  1. Idaho National Laboratory (INL), Idaho Falls, ID (United States)
Publication Date:
Research Org.:
Idaho National Lab. (INL), Idaho Falls, ID (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Fusion Energy Sciences (FES) (SC-24)
OSTI Identifier:
1484498
Report Number(s):
INL/EXT-18-51396-Rev000
DOE Contract Number:  
AC07-05ID14517
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; failure rate

Citation Formats

Cadwallader, Lee C. Failure Rate Estimates for Passive Mechanical Components. United States: N. p., 2018. Web. doi:10.2172/1484498.
Cadwallader, Lee C. Failure Rate Estimates for Passive Mechanical Components. United States. doi:10.2172/1484498.
Cadwallader, Lee C. Thu . "Failure Rate Estimates for Passive Mechanical Components". United States. doi:10.2172/1484498. https://www.osti.gov/servlets/purl/1484498.
@article{osti_1484498,
title = {Failure Rate Estimates for Passive Mechanical Components},
author = {Cadwallader, Lee C.},
abstractNote = {Fusion design projects that reach the stage of design reviews typically require reliability, availability, maintainability and inspectability (RAMI) assessments. While many kinds of reliability and maintainability data are needed for a wide variety of fusion components to quantify a RAMI assessment, one of the types of components requiring data is the passive mechanical component. Passive mechanical components can be items such as metal plates, rods, shafts, brackets, bolts, and other items. Generally these passive components tend to have low failure rates since they are simple designs, have no or few moving parts, and do not need control signals to perform their design function. However, there are no widely recognized datasets for such components, so analysts must use multiple datasets and judgment for failure rates. This report gives recommended failure rates for various failure modes of these components, and gives suggested failure rate multipliers to apply to these failure rates if they reside in harsh environments. If the component resides far from the tokamak then typical industrial failure rates would suffice. Components near the tokamak find conditions can be demanding; similar to those in a fission reactor containment building. Some component failure rates can be modified if the components reside inside the tokamak.},
doi = {10.2172/1484498},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2018},
month = {10}
}

Technical Report:

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