Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Safety Reviews of Technical System Modifications in the Nuclear Industry
KTH, School of Architecture and the Built Environment (ABE), Philosophy and History of Technology, Philosophy. (Risk och Säkerhet, Risk and Safety)
2013 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

The function of safety reviews (here understood as expert judgements on proposals for design modifications and redesign of technical systems in commercial Nuclear Power Plants, supported by formalised safety review processes) plays a fundamental role for safety in nuclear installations. The primary aims of the presented case studies includes: critically examining and identifying the main areas for improvement of the existing technical safety review process as it is conducted at a Swedish nuclear power plant, developing a new process, and evaluating whether any improvements were accomplished. By using qualitative methods, observation/participation and interviews, data has been gathered on how the safety review process is perceived and conducted by experts involved in the safety review process, and ways to improve this process have been developed. This area is neglected in the larger safety literature. The novel approach here is to gather data directly from those involved in the safety review process, analysis of safety review reports as well as from inspection reports by the regulatory authority.

The study presented in paper I shows that the partition between primary and independent review is positive, having supplementary roles with different focus and staff with different skills and perspectives making the reviews. The study identifies a number of areas for improvement, such as: - a tendency to put too much resource on minor assignments - a clearer prioritization would improve focus on the most critical projects - there is a need for improved guidance and direction for how to structure the work It is argued that future applications of safety review processes should focus more on communicating and clarifying the process and its adherent requirements, and improve the feedback system within the process. It is also recommended that the NPPs create introductory training for new reviewers

The study presented in paper II concluded that grading of the primary safety review reports facilitates improved experience feedback by providing easier access to good examples for reviewers. Improvements identified by implementing the revised process are primarily linked to the independent safety review function, including better planning and means for resource allocation as well as clearer and more unambiguous supporting instructions. Introduction of formalized independent review meetings provides increased exchange of knowledge and strengthened the independent safety review function in the organization.

Place, publisher, year, edition, pages
Stockholm: KTH Royal Institute of Technology, 2013. , 52 p.
Series
Theses in Risk and Safety from the Division of Philosophy at the Royal Institute of Technology, ISSN 1654-627X
Keyword [en]
safety, safety review, nuclear, nuclear power plant, process, process improvement, action research, experience feedback
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:kth:diva-118843ISBN: 978-91-7501-665-8 (print)OAI: oai:DiVA.org:kth-118843DiVA: diva2:608889
Presentation
2013-03-19, 231, Teknikringen 78 B, Stockholm, 13:00 (English)
Opponent
Supervisors
Note

QC 20130305

Available from: 2013-03-05 Created: 2013-03-01 Last updated: 2013-03-06Bibliographically approved
List of papers
1. Challenges in performing technical safety reviews of modifications: A case study
Open this publication in new window or tab >>Challenges in performing technical safety reviews of modifications: A case study
2012 (English)In: Safety Science, ISSN 0925-7535, E-ISSN 1879-1042, Vol. 50, no 7, 1558-1568 p.Article in journal (Refereed) Published
Abstract [en]

The aim of the present study, is to identify strengths and weaknesses of the technical safety review process at a Swedish Nuclear Power Plant (NPP). In this context, the function of safety reviews are understood as expert judgements on proposals for design modifications. 1" Design modifications" are here understood as alterations of an existing design. 1 and redesign of technical systems (i.e. commercial nuclear reactors), supported by formalised safety review processes. The chosen methodology is using two complementary methods: interviews of personnel performing safety reviews, and analysis of safety review reports from 2005 to 2009.The study shows that personal integrity is a trademark of the review staff and there are sufficient support systems to ensure high quality. The partition between primary and independent review is positive, having different focus and staff with different skills and perspectives making the reviews, which implies supplementary roles. The process contributes to " getting the right things done the right way" . The study also shows that though efficient communication, feedback, processes for continuous improvement, and " learning organizations" are well known success factors in academia, it is not that simple to implement and accomplish in real life.It is argued that future applications of safety review processes should focus more on communicating and clarifying the process and its adherent requirements, and improve the feedback system within the process.

Keyword
Nuclear, Process, Safety, Safety review
National Category
Philosophy
Identifiers
urn:nbn:se:kth:diva-95729 (URN)10.1016/j.ssci.2012.03.009 (DOI)000305265500015 ()2-s2.0-84860844773 (Scopus ID)
Note

QC 20120529

Available from: 2012-05-29 Created: 2012-05-29 Last updated: 2017-12-07Bibliographically approved
2. Less is more?: results from a case study onimproving the safety review process at a nuclearpower plant
Open this publication in new window or tab >>Less is more?: results from a case study onimproving the safety review process at a nuclearpower plant
(English)In: International Journal of Nuclear Knowledge Management, ISSN 1479-540X, E-ISSN 1479-5418Article in journal (Refereed) In press
Abstract [en]

This paper focuses on technical safety reviews of plant modifications at a Swedish nuclearpower plant. The primary aims of the presented study include identifying the main areas forimprovement of the existing technical safety review process, developing a new process, andevaluating whether any improvements were accomplished. It was concluded that grading ofthe primary safety review reports facilitates improved experience feedback by providingeasier access to good examples for reviewers. However, the experience feedback process is aspecific area in which the revised safety review process has not been as successful as desired.Improvements identified by implementing the revised process are primarily linked to theindependent safety review function, including better planning and means for resourceallocation as well as clearer and more unambiguous supporting instructions. Introduction offormalized independent review meetings provides increased exchange of knowledge andstrengthened the independent safety review function in the organisation.

Keyword
Safety, Safety review, Nuclear, Nuclear Power Plant, Process, Process improvement, Action research, Experience feedback
National Category
Philosophy
Identifiers
urn:nbn:se:kth:diva-118842 (URN)
Note

QP 2013

Available from: 2013-03-01 Created: 2013-03-01 Last updated: 2017-12-06Bibliographically approved

Open Access in DiVA

fulltext(736 kB)577 downloads
File information
File name FULLTEXT01.pdfFile size 736 kBChecksum SHA-512
227d6ffb93c26865fd1900f0e7c412d9d322ff80a91f3bdbba43bdf187fc00e46aa133e9446f47a8964a78f5dc2efc4727d89606d4f6fbfab15d958e46f17da6
Type fulltextMimetype application/pdf

Search in DiVA

By author/editor
Falk, Thomas
By organisation
Philosophy
Natural Sciences

Search outside of DiVA

GoogleGoogle Scholar
Total: 577 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

isbn
urn-nbn

Altmetric score

isbn
urn-nbn
Total: 293 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf