Get Advanced Seminar on Common Cause Failure Analysis in PDF

By A. Amendola (auth.), Aniello Amendola (eds.)

ISBN-10: 9048140455

ISBN-13: 9789048140459

ISBN-10: 9401706298

ISBN-13: 9789401706292

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Read Online or Download Advanced Seminar on Common Cause Failure Analysis in Probabilistic Safety Assessment: Proceedings of the ISPRA Course held at the Joint Research Centre, Ispra, Italy, 16–19 November 1987 PDF

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Extra resources for Advanced Seminar on Common Cause Failure Analysis in Probabilistic Safety Assessment: Proceedings of the ISPRA Course held at the Joint Research Centre, Ispra, Italy, 16–19 November 1987

Sample text

Design Deficiency unrecognized interdependence between "independent" subsystems, components unrecognized electrical or mechanical dependence on common elements dependence on equipment or parameters wh0se failure or abnormality causes need for protection 3. Operation and Maintenance Errors miscalibration inadequate or improper testing outdated instructions or prints carelessness in maintenance other human factors 4. External Phenomena tornado fire flood earthquake 5. Functional Deficiency misunderstanding of process variable behaviour inadequacy of designed protective action inappropriate instrumentation In reality, major accident occurrences like TMI have shown that the multiple defences built-in to protect a NPP from core meltdown events can be lost as a result of very complex dependency structures involving a combination of causative factors related to design, procedural, operational and management aspects as well as to hardware failures.

Qualitative Review of Probabilistic Safety Assessment Characteristics'. International SNS/ENS/ANS Topical Meeting on Probabilistic Safety Assessment and Risk Management, Zurich, Switzerland, August 30 - September 4, 1987. 16. , 'Common Cause Failure Reliability Benchmark Exercise'. Final Report, CEC-JRC Ispra EUR 11054 EN. 17. , 'A Systematic Feedback of Plant Disturbance Experience in Nuclear Power Plants'. D. Thesis (in Swedish), Helsinki University of Technology, December 1984. - 29 - CLASSIFICATION OF MULTIPLE RELATED FAILURES A.

In spite of the similarities, the parallel studies of accident sequence and systems analysis modelling have disclosed specific discrepancies with regard to functional and shared-equipment dependencies, which do not necessarily origin from the actual design differences, but are due to different perception of the design, different assumptions or mistakes. The main problem from the point of view of the comparative analyses, is the varying standard of the documentation of the studies. This means that some of the PSAs may be reasonably complete, but their credibility would be higher and the review process would be facilitated given an improved documentation.

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Advanced Seminar on Common Cause Failure Analysis in Probabilistic Safety Assessment: Proceedings of the ISPRA Course held at the Joint Research Centre, Ispra, Italy, 16–19 November 1987 by A. Amendola (auth.), Aniello Amendola (eds.)


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