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Sökning: WFRF:(Holmberg Erik) > Kungliga Tekniska Högskolan > Bladh K

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1.
  • Bladh, K., et al. (författare)
  • An approach to analyse human reliability during refuelling outage of a nuclear power plant
  • 2007
  • Ingår i: Proc. of Enlarged Halden Programme Group Meeting.
  • Konferensbidrag (övrigt vetenskapligt)abstract
    • Human reliability analysis (HRA) constitutes a central role in the probabilistic safety assessment (PSA) for the low power and shutdown period of a nuclear power plant. This is because a large number of operative and maintenance activities take place during a refuelling outage when the plant, to a great extent, is disassembled, maintained, and then reassembled back to operational mode. The paper presents the HRA approach used in the shutdown PSA for Forsmark 1/2 and 3 nuclear power units in Sweden. Challenges of the analysis comprises handling the large scope of activities to be analysed, development and use of a quantification method consistent with the full power PSA, and integration of HRA with the “technical” part of PSA. Experiences from the analysis and results will also be discussed.
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2.
  • Bladh, K., et al. (författare)
  • An evaluation of the enhanced Bayesian THERP method using simulator data
  • 2009
  • Ingår i: SAFETY, RELIABILITY AND RISK ANALYSIS : THEORY, METHODS AND APPLICATIONS, VOLS 1-4. - London : Taylor & Francis Group. ; s. 227-232
  • Konferensbidrag (övrigt vetenskapligt)abstract
    • The Enhanced Bayesian THERP (Technique for Human Reliability Analysis) method has been successfully used in real PSA-studies at Finnish and Swedish NPPs. The method offers a systematic approach to qualitatively and quantitatively analyze operator actions. In order to better know its characteristics from a more international perspective, it has been subject to evaluation within the framework of the "HRA Methods Empirical Study Using Simulator Data." This paper gives a brief overview of the method with major findings from the evaluation work including identified strengths and potential weaknesses of the method. A number of possible improvement areas have been identified and will be considered in future development of the method.
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3.
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4.
  • Holmberg, Jan-Erik, et al. (författare)
  • The Application of the Enhanced Bayesian THERP in the HRA Methods Empirical Study Using Simulator Data
  • 2008
  • Ingår i: Proc. of PSAM 9 — International Conference on Probabilistic Safety Assessment & Management, 18–23 May 2008, Hong Kong, China, IAPSAM — International Association of Probabilistic Safety Assessment and Management.
  • Konferensbidrag (övrigt vetenskapligt)abstract
    • PSAM 9. International Conference on Probabilistic Safety Assessment & Management. Hong Kong, China, 18 - 23 May 2008. Paper 0180 The enhanced Bayesian THERP (Technique for Human Reliability Analysis) method is based on the use of the time-reliability curve introduced in the Swain's human reliability analysis (HRA) handbook and on adjustment of the time-dependent human error probabilities with five performance shaping factors (PSFs): (1) support from procedures, (2) support from training, (3) feedback from process, (4) need for co-ordination and communication, (5) mental load, decision burden. In the enhanced Bayesian THERP, the PSFs are elicited by expert judgments, which are then aggregated in a Bayesian manner. This approach has been successfully used in real PSA-studies, where the plant operators have been the experts assessing the levels of the PSFs. The method has proven to be a systematic way to qualitatively and quantitatively analyze operator actions. This paper presents the application of the enhanced Bayesian THERP in an international study "HRA Methods Empirical Study Using Simulator Data." The enhanced Bayesian THERP (Technique for Human Reliability Analysis) method is based on the use of the time-reliability curve introduced in the Swain's human reliability analysis (HRA) handbook and on adjustment of the time-dependent human error probabilities with five performance shaping factors (PSFs): (1) support from procedures, (2) support from training, (3) feedback from process, (4) need for co-ordination and communication, (5) mental load, decision burden. In the enhanced Bayesian THERP, the PSFs are elicited by expert judgments, which are then aggregated in a Bayesian manner. This approach has been successfully used in real PSA-studies, where the plant operators have been the experts assessing the levels of the PSFs. The method has proven to be a systematic way to qualitatively and quantitatively analyze operator actions. This paper presents the application of the enhanced Bayesian THERP in an international study "HRA Methods Empirical Study Using Simulator Data
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  • Resultat 1-4 av 4
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övrigt vetenskapligt (4)
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Holmberg, Jan-Erik, (4)
Bladh, K. (4)
Nirmark, J. (2)
Kahlbom, U. (1)
Sparre, E. (1)
Pyy, P. (1)
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Sandstedt, J. (1)
Oxstrand, J (1)
Pekka, P (1)
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