Human reliability analysis methods for probabilistic safety assessment: Dissertation

Pekka Pyy

Research output: Thesis › Dissertation › Collection of Articles

Abstract

Human reliability analysis (HRA) of a probabilistic safety assessment (PSA) includes identifying human actions from safety point of view, modelling the most important of them in PSA models, and assessing their probabilities. As manifested by many incidents and studies, human actions may have both positive and negative effect on safety and economy. Human reliability analysis is one of the areas of probabilistic safety assessment (PSA) that has direct applications outside the nuclear industry. The thesis focuses upon developments in human reliability analysis methods and data. The aim is to support PSA by extending the applicability of HRA. The thesis consists of six publications and a summary. The summary includes general considerations and a discussion about human actions in the nuclear power plant (NPP) environment. A condensed discussion about the results of the attached publications is then given, including new development in methods and data. At the end of the summary part, the contribution of the publications to good practice in HRA is presented. In the publications, studies based on the collection of data on maintenance-related failures, simulator runs and expert judgement are presented in order to extend the human reliability analysis database. Furthermore, methodological frameworks are presented to perform a comprehensive HRA, including shutdown conditions, to study reliability of decision making, and to study the effects of wrong human actions. In the last publication, an interdisciplinary approach to analysing human decision making is presented. The publications also include practical applications of the presented methodological frameworks.
Original languageEnglish
QualificationDoctor Degree
Awarding Institution
  • Lappeenranta University of Technology
Supervisors/Advisors
  • Kalli, Heikki, Supervisor, External person
Award date7 Dec 2000
Place of PublicationEspoo
Publisher
Print ISBNs951-38-5585-6
Electronic ISBNs951-38-5586-4
Publication statusPublished - 2000
MoE publication typeG5 Doctoral dissertation (article)

Fingerprint

Reliability analysis
Decision making
Nuclear industry
Nuclear power plants
Simulators

Keywords

  • human reliability analysis
  • HRA
  • probabilistic safety assessment
  • human factors
  • decision making
  • expert judgement
  • simulator studies

Cite this

Pyy, P. (2000). Human reliability analysis methods for probabilistic safety assessment: Dissertation. Espoo: VTT Technical Research Centre of Finland.
Pyy, Pekka. / Human reliability analysis methods for probabilistic safety assessment : Dissertation. Espoo : VTT Technical Research Centre of Finland, 2000. 67 p.
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Pyy, P 2000, 'Human reliability analysis methods for probabilistic safety assessment: Dissertation', Doctor Degree, Lappeenranta University of Technology , Espoo.

Human reliability analysis methods for probabilistic safety assessment : Dissertation. / Pyy, Pekka.

Espoo : VTT Technical Research Centre of Finland, 2000. 67 p.

Research output: Thesis › Dissertation › Collection of Articles

TY - THES

T1 - Human reliability analysis methods for probabilistic safety assessment

T2 - Dissertation

AU - Pyy, Pekka

PY - 2000

Y1 - 2000

N2 - Human reliability analysis (HRA) of a probabilistic safety assessment (PSA) includes identifying human actions from safety point of view, modelling the most important of them in PSA models, and assessing their probabilities. As manifested by many incidents and studies, human actions may have both positive and negative effect on safety and economy. Human reliability analysis is one of the areas of probabilistic safety assessment (PSA) that has direct applications outside the nuclear industry. The thesis focuses upon developments in human reliability analysis methods and data. The aim is to support PSA by extending the applicability of HRA. The thesis consists of six publications and a summary. The summary includes general considerations and a discussion about human actions in the nuclear power plant (NPP) environment. A condensed discussion about the results of the attached publications is then given, including new development in methods and data. At the end of the summary part, the contribution of the publications to good practice in HRA is presented. In the publications, studies based on the collection of data on maintenance-related failures, simulator runs and expert judgement are presented in order to extend the human reliability analysis database. Furthermore, methodological frameworks are presented to perform a comprehensive HRA, including shutdown conditions, to study reliability of decision making, and to study the effects of wrong human actions. In the last publication, an interdisciplinary approach to analysing human decision making is presented. The publications also include practical applications of the presented methodological frameworks.

AB - Human reliability analysis (HRA) of a probabilistic safety assessment (PSA) includes identifying human actions from safety point of view, modelling the most important of them in PSA models, and assessing their probabilities. As manifested by many incidents and studies, human actions may have both positive and negative effect on safety and economy. Human reliability analysis is one of the areas of probabilistic safety assessment (PSA) that has direct applications outside the nuclear industry. The thesis focuses upon developments in human reliability analysis methods and data. The aim is to support PSA by extending the applicability of HRA. The thesis consists of six publications and a summary. The summary includes general considerations and a discussion about human actions in the nuclear power plant (NPP) environment. A condensed discussion about the results of the attached publications is then given, including new development in methods and data. At the end of the summary part, the contribution of the publications to good practice in HRA is presented. In the publications, studies based on the collection of data on maintenance-related failures, simulator runs and expert judgement are presented in order to extend the human reliability analysis database. Furthermore, methodological frameworks are presented to perform a comprehensive HRA, including shutdown conditions, to study reliability of decision making, and to study the effects of wrong human actions. In the last publication, an interdisciplinary approach to analysing human decision making is presented. The publications also include practical applications of the presented methodological frameworks.

KW - human reliability analysis

KW - HRA

KW - probabilistic safety assessment

KW - human factors

KW - decision making

KW - expert judgement

KW - simulator studies

M3 - Dissertation

SN - 951-38-5585-6

T3 - VTT Publications

PB - VTT Technical Research Centre of Finland

CY - Espoo

ER -

Pyy P. Human reliability analysis methods for probabilistic safety assessment: Dissertation. Espoo: VTT Technical Research Centre of Finland, 2000. 67 p.

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