Human reliability in probabilistic risk assessment

A retrospective study

Pekka Pyy, Urho Pulkkinen

Research output: Book/ReportReportProfessional

Abstract

The aim of this report is to describe methods used in the human reliability analyses of five probabilistic risk assessments and the results achieved. The studies chosen are the German Risk Study, the Seabrook Study, the Oconee Study, the Calvert Cliffs Study and the Sizewell B Study. The studies are compared in respect of their human actions analysis and some general conclusions drawn. The main areas of the study are: scopes and objectives of the human action analyses, identification and classification of human errors, treatment of maintenance versus operational activities, impact of recovery actions, inclusion of psychological factors, human actions modelling, data sources used and impact of human activities on the core melt frequency. In addition, the uncertainty analyses connected with human reliability are reviewed. Similar and diverse ways to analyse human reliability are illustrated in several tables and figures. As the conclusion, it became evident that the quality of human actions analysis documentation varies significantly. Also the extent, to which the commission type human errors causing easily hazardous plant transient are taken into account, is usually low. The models utilized are mostly simple logical models suitable for calculation but hardly for detailled modelling purposes. Data for human reliability estimates is mainly taken from subjective sources. This procedure does not, however, explain all the differences in the results, but the degree of the inclusion of recovery has here an important role. Human actions have the key role in every study, in which they are addressed extensively, which is also reflected in the results.
Original languageEnglish
Place of PublicationEspoo
PublisherVTT Technical Research Centre of Finland
Number of pages75
ISBN (Print)951-38-3288-0
Publication statusPublished - 1988
MoE publication typeNot Eligible

Publication series

NameTiedotteita / Valtion teknillinen tutkimuskeskus
PublisherVTT
No.908
ISSN (Print)0358-5085

Fingerprint

risk assessment
cliff
modeling
human activity
melt
analysis
documentation
calculation
method

Keywords

  • reliability
  • risk analysis
  • probability
  • human factors

Cite this

Pyy, P., & Pulkkinen, U. (1988). Human reliability in probabilistic risk assessment: A retrospective study. Espoo: VTT Technical Research Centre of Finland. Valtion teknillinen tutkimuskeskus. Tiedotteita, No. 908
Pyy, Pekka ; Pulkkinen, Urho. / Human reliability in probabilistic risk assessment : A retrospective study. Espoo : VTT Technical Research Centre of Finland, 1988. 75 p. (Valtion teknillinen tutkimuskeskus. Tiedotteita; No. 908).
@book{5f1a2f52bf2d4283ba8ca7edb9c44d03,
title = "Human reliability in probabilistic risk assessment: A retrospective study",
abstract = "The aim of this report is to describe methods used in the human reliability analyses of five probabilistic risk assessments and the results achieved. The studies chosen are the German Risk Study, the Seabrook Study, the Oconee Study, the Calvert Cliffs Study and the Sizewell B Study. The studies are compared in respect of their human actions analysis and some general conclusions drawn. The main areas of the study are: scopes and objectives of the human action analyses, identification and classification of human errors, treatment of maintenance versus operational activities, impact of recovery actions, inclusion of psychological factors, human actions modelling, data sources used and impact of human activities on the core melt frequency. In addition, the uncertainty analyses connected with human reliability are reviewed. Similar and diverse ways to analyse human reliability are illustrated in several tables and figures. As the conclusion, it became evident that the quality of human actions analysis documentation varies significantly. Also the extent, to which the commission type human errors causing easily hazardous plant transient are taken into account, is usually low. The models utilized are mostly simple logical models suitable for calculation but hardly for detailled modelling purposes. Data for human reliability estimates is mainly taken from subjective sources. This procedure does not, however, explain all the differences in the results, but the degree of the inclusion of recovery has here an important role. Human actions have the key role in every study, in which they are addressed extensively, which is also reflected in the results.",
keywords = "reliability, risk analysis, probability, human factors",
author = "Pekka Pyy and Urho Pulkkinen",
year = "1988",
language = "English",
isbn = "951-38-3288-0",
series = "Tiedotteita / Valtion teknillinen tutkimuskeskus",
publisher = "VTT Technical Research Centre of Finland",
number = "908",
address = "Finland",

}

Pyy, P & Pulkkinen, U 1988, Human reliability in probabilistic risk assessment: A retrospective study. Valtion teknillinen tutkimuskeskus. Tiedotteita, no. 908, VTT Technical Research Centre of Finland, Espoo.

Human reliability in probabilistic risk assessment : A retrospective study. / Pyy, Pekka; Pulkkinen, Urho.

Espoo : VTT Technical Research Centre of Finland, 1988. 75 p. (Valtion teknillinen tutkimuskeskus. Tiedotteita; No. 908).

Research output: Book/ReportReportProfessional

TY - BOOK

T1 - Human reliability in probabilistic risk assessment

T2 - A retrospective study

AU - Pyy, Pekka

AU - Pulkkinen, Urho

PY - 1988

Y1 - 1988

N2 - The aim of this report is to describe methods used in the human reliability analyses of five probabilistic risk assessments and the results achieved. The studies chosen are the German Risk Study, the Seabrook Study, the Oconee Study, the Calvert Cliffs Study and the Sizewell B Study. The studies are compared in respect of their human actions analysis and some general conclusions drawn. The main areas of the study are: scopes and objectives of the human action analyses, identification and classification of human errors, treatment of maintenance versus operational activities, impact of recovery actions, inclusion of psychological factors, human actions modelling, data sources used and impact of human activities on the core melt frequency. In addition, the uncertainty analyses connected with human reliability are reviewed. Similar and diverse ways to analyse human reliability are illustrated in several tables and figures. As the conclusion, it became evident that the quality of human actions analysis documentation varies significantly. Also the extent, to which the commission type human errors causing easily hazardous plant transient are taken into account, is usually low. The models utilized are mostly simple logical models suitable for calculation but hardly for detailled modelling purposes. Data for human reliability estimates is mainly taken from subjective sources. This procedure does not, however, explain all the differences in the results, but the degree of the inclusion of recovery has here an important role. Human actions have the key role in every study, in which they are addressed extensively, which is also reflected in the results.

AB - The aim of this report is to describe methods used in the human reliability analyses of five probabilistic risk assessments and the results achieved. The studies chosen are the German Risk Study, the Seabrook Study, the Oconee Study, the Calvert Cliffs Study and the Sizewell B Study. The studies are compared in respect of their human actions analysis and some general conclusions drawn. The main areas of the study are: scopes and objectives of the human action analyses, identification and classification of human errors, treatment of maintenance versus operational activities, impact of recovery actions, inclusion of psychological factors, human actions modelling, data sources used and impact of human activities on the core melt frequency. In addition, the uncertainty analyses connected with human reliability are reviewed. Similar and diverse ways to analyse human reliability are illustrated in several tables and figures. As the conclusion, it became evident that the quality of human actions analysis documentation varies significantly. Also the extent, to which the commission type human errors causing easily hazardous plant transient are taken into account, is usually low. The models utilized are mostly simple logical models suitable for calculation but hardly for detailled modelling purposes. Data for human reliability estimates is mainly taken from subjective sources. This procedure does not, however, explain all the differences in the results, but the degree of the inclusion of recovery has here an important role. Human actions have the key role in every study, in which they are addressed extensively, which is also reflected in the results.

KW - reliability

KW - risk analysis

KW - probability

KW - human factors

M3 - Report

SN - 951-38-3288-0

T3 - Tiedotteita / Valtion teknillinen tutkimuskeskus

BT - Human reliability in probabilistic risk assessment

PB - VTT Technical Research Centre of Finland

CY - Espoo

ER -

Pyy P, Pulkkinen U. Human reliability in probabilistic risk assessment: A retrospective study. Espoo: VTT Technical Research Centre of Finland, 1988. 75 p. (Valtion teknillinen tutkimuskeskus. Tiedotteita; No. 908).