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The Nordic PSA Group (NPSAG) is a common forum for discussion of issues related to probabilistic safety assessment (PSA) of nuclear power plants, with focus on research and development needs. The group follows and discusses current issues related to PSA nationally and internationally, as well as PSA activities at the participating utilities. The group initiates and co-ordinates research and development activities and discusses how new knowledge shall be used.

The NPSAG was founded in December 2000 by the nuclear utilities in Finland and Sweden. In addition, the Radiation and Nuclear Safety Authority (STUK) in Finland and the Swedish Radiation Safety Authority (SSM) participate as associated members, which together with the utilities may take part in the funding of the projects within the NPSAG.

All projects sorted by projectnumber

00-001:  General Matters »
Project Manager, NPSAG: NPSAG secretary   Start Year: 2000

00-002:  NPSAG Secretary »
Project Manager, NPSAG: NPSAG secretary   Start Year: 2000

00-003:  NPSAG Autumn Seminar »
Project Manager, NPSAG: NPSAG secretary   Start Year: 2008

00-004:  NPSAG Castle Meeting PSA »
  Start Year: 2000

01-001:  Mapping of Activities Concerning Safety and Reliability at Educational Institutions »
Project Manager, NPSAG: Ralph Nyman   Start Year: 2000   Finish Year: 2001

01-002:  NAFCS – Nordic Working Group for CCF Analysis »
Project Manager, NPSAG: Ralph Nyman   Project Manager, External: Gunnar Johanson   Start Year: 2000   Finish Year: 2004

01-003:  Analysis of External Events »
Project Manager, NPSAG: Ingemar Ingemarson   Project Manager, External: Michael Knochenhauer   Start Year: 2000   Finish Year: 2003

01-004:  RADDA - Development of Methods for Analysis of Reactivity »
Project Manager, NPSAG: Göran Hultqvist   Start Year: 2000   Finish Year: 2015

01-006:  PSA End States »
Project Manager, NPSAG: Göran Hultkvist   Start Year: 2000

01-012:  International Database of Fire Events (OECD FIRE) »
Project Manager, NPSAG: Ralph Nyman   Project Manager, External: Anders Angner   Start Year: 2000   Finish Year: 2005

02-004:  Plant Effects of Loss of Room Cooling/Heating »
Project Manager, NPSAG: Göran Hultqvist   Start Year: 2001

03-001:  Quality Requirements on PSA in Risk-informed Applications »
  Project Manager, External: Ola Bäckström   Start Year: 2001   Finish Year: 2003

03-002:  Common Reporting Procedures for Fire Events »
  Project Manager, External: Anders Angner   Start Year: 2001   Finish Year: 2002

04-005:  Comparison of Methods for Modelling CCF in High Redundancy Systems »
Project Manager, NPSAG: Ralph Nyman   Project Manager, External: Urho Pulkkinen   Start Year: 2001   Finish Year: 2004

04-006:  International Common Cause Failure Data Exchange (OECD ICDE) »
Project Manager, NPSAG: Anders Karlsson   Project Manager, External: Gunnar Johanson   Start Year: 2001

04-007:  Database and Frequencies for Pipe Breaks (R book) »
Project Manager, NPSAG: Göran Hultqvist   Project Manager, External: Anders Olsson   Start Year: 2001

05-001:  Information about Activities in BWR Club »
Project Manager, NPSAG: Anders Karlsson   Start Year: 2002

05-002:  Information about Activities in NKS (Nordic Nuclear Safety Research) »
Project Manager, NPSAG: Göran Hultqvist   Start Year: 2002

05-003:  CCF Data for Control Rod Drive Assemblies (CRDA) »
Project Manager, NPSAG: Risto Himanen   Project Manager, External: Tuomas Mankamo   Start Year: 2002   Finish Year: 2007

07-001:  Information about Activities in the Swedish Fire Safety Group (NBSG) »
Project Manager, NPSAG: Christian Karlsson   Start Year: 2002

07-002:  Development of NPSAG Webpage »
Project Manager, NPSAG: Michael Knochenhauer   Start Year: 2002

08-001:  Choice of Pipe Break Data in Nordic PSAs (R book) »
  Start Year: 2003   Finish Year: 2004

09-001:  NAFCS – Nordic Working Group for CCF Analysis – Continued Activities »
Project Manager, NPSAG: Göran Hultqvist   Project Manager, External: Gunnar Johanson   Start Year: 2003

11-001:  Subjective and Objective Probabilities in Nuclear Safety »
Project Manager, NPSAG: Ralph Nyman   Start Year: 2004   Finish Year: 2004

11-002:  Interpretation and Use of PSA Results »
Project Manager, NPSAG: Michael Knochenhauer   Project Manager, External: Michael Knochenhauer   Start Year: 2004   Finish Year: 2004

11-003:  T Code – Computerised Code for Handling and Analysis of T Book Data »
Project Manager, NPSAG: Ingemar Ingemarson   Project Manager, External: Ola Bäckström   Start Year: 2004   Finish Year: 2005

11-004:  Evaluation of Current HRA Methods (EXAM-HRA) »
Project Manager, NPSAG: Göran Hultqvist   Project Manager, External: Anders Olsson   Start Year: 2004

11-005:  Continuity in Activities Related to T Book and T Code »
Project Manager, NPSAG: Ingemar Ingemarson   Project Manager, External: Gunnar Johanson   Start Year: 2004   Finish Year: 2005

11-006:  Training Programme on Dependencies and CCF »
Project Manager, NPSAG: Stefan Eriksson   Project Manager, External: Gunnar Johanson   Start Year: 2004

12-004:  SARNET - Severe Accident Research Network »
Project Manager, NPSAG: Göran Hultqvist   Project Manager, External: Leif Spanier   Start Year: 2004

12-005:  Data for PSA Models »
Project Manager, NPSAG: Ingemar Ingemarson   Start Year: 2004   Finish Year: 2006

13-001:  Common Methodology Descriptions for PSA »
Project Manager, NPSAG: Göran Hultkvist   Start Year: 2005

14-001:  The Validity of Safety Goals »
Project Manager, NPSAG: Göran Hultqvist   Project Manager, External: Michael Knochenhauer   Start Year: 2005   Finish Year: 2009

14-002:  Interpretation and Risk Assessment of TechSpec Requirements »
Project Manager, NPSAG: Göran Hultkvist   Project Manager, External: Ola Bäckström   Start Year: 2005

14-004:  APSA - Ageing PSA »
Project Manager, NPSAG: Göran Hultqvist   Project Manager, External: Per Hellström   Start Year: 2005   Finish Year: 2006

17-001:  Information about Activities in the TUD Group »
Project Manager, NPSAG: Ralph Nyman   Start Year: 2006

17-003:  Conferences and information distribution »
  Start Year: 2006

18-001:  Cooperation with the SAFIR program »
Project Manager, NPSAG: Juho Helander   Start Year: 2006

20-001:  Pilot study concerning handling of loss of external grid in PSA »
Project Manager, NPSAG: Stefan Eriksson   Project Manager, External: Erik Sparre   Start Year: 2007

20-002:  Safety assessment of programmable electronics »
Project Manager, NPSAG: Stefan Eriksson   Project Manager, External: Michael Knochenhauer   Start Year: 2008

20-002:  Strategy for Investigating the Impact from Hot Shorts »
Project Manager, NPSAG: Stefan Eriksson   Project Manager, External: Stefan Authén   Start Year: 2007

20-004:  Analysis of CCF Data (NAFCS-2) »
Project Manager, NPSAG: Göran Hultqvist   Project Manager, External: Gunnar Johanson   Start Year: 2007

20-005:  Tools for risk follow-up »
Project Manager, NPSAG: Göran Hultkvist   Project Manager, External: Jan-Erik Holmberg   Start Year: 2007

21-001:  Principles for Data Analysis and Parameter Assessment »
Project Manager, NPSAG: Svenne Skagerman   Project Manager, External: Ola Bäckström   Start Year: 2007

21-002:  EU Project NULIFE Nuclear Plant Life Prediction »
Project Manager, NPSAG: Göran Hultqvist   Start Year: 2007

22-001:  ASAMPSA2 - Advanced Safety Assessment Methodologies: Level 2 PSA »
Project Manager, NPSAG: Göran Hultqvist   Start Year: 2008

22-002:  Safety assessment of programmable electronics »
Project Manager, NPSAG: Stefan Eriksson   Project Manager, External: Michael Knochenhauer   Start Year: 2008

22-003:  Analysis of Critical Component Types »
  Project Manager, External: Johan Sandstedt   Start Year: 2008

22-005:  Increased user friendliness and transparency in PSA models »
Project Manager, NPSAG: -   Project Manager, External: Stefan Authén   Start Year: 2008

22-006:  Quantification quality of Nordic PSAs »
  Project Manager, External: Jussi Vaurio   Start Year: 2008

25-001:  Contacts between NPSAG and VGB »
Project Manager, NPSAG: Göran Hultqvist   Project Manager, External: Bernd Schubert   Start Year: 2009   Finish Year: 2011

28-001:  Call for Proposals 2010 »
Project Manager, NPSAG: Michael Knochenhauer   Start Year: 2010

28-002:  Identification and Handling of Critical CCCG »
Project Manager, NPSAG: Göran Hultqvist   Project Manager, External: Johan Sandstedt   Start Year: 2010

28-003:  CCF Quantification Considering Barriers against Dependencies – Thesis Application »
Project Manager, NPSAG: Ralph Nyman   Project Manager, External: Gunnar Johanson   Start Year: 2010

28-004:  Functionally Based Grouping of Components »
Project Manager, NPSAG: Sven Skagerman   Project Manager, External: Vidar Hedtjärn Swaling   Start Year: 2010

29-001:  Level 3 PSA »
Project Manager, NPSAG: Cilla Andersson   Start Year: 2010

29-002:  Integrating the use of probabilistic and deterministic analysis in plant safety management »
Project Manager, NPSAG: Göran Hultkvist   Project Manager, External: Michael Knochenhauer   Start Year: 2010

30-001:  Contacts between NPSAG and KTH »
Project Manager, NPSAG: Göran Hultqvist   Project Manager, External: Jan-Erik Holmberg   Start Year: 2010

30-002:  Application of ASME PRA Standard on Nordic PSA »
Project Manager, NPSAG: Göran Hultqvist   Project Manager, External: Ola Bäckström   Start Year: 2010

32-001:  NPSAG Project Proposals 2011 »
Project Manager, NPSAG: Michael Knochenhauer   Start Year: 2011

34-001:  NPSAG Project Proposals 2012 »
Project Manager, NPSAG: Michael Knochenhauer   Start Year: 2012

34-002:  Methods for Analysis of High Redundancy CCFs »
Project Manager, NPSAG: Anders Karlsson

34-003:  Common methodology for analysis of initiating events »
Project Manager, NPSAG: Ralph Nyman   Start Year: 2012   Finish Year: 2014

35-002:  Evaluation of Risk Measuring Systems »
Project Manager, NPSAG: Göran Hultqvist   Project Manager, External: Gunnar Johanson   Start Year: 2012

36-001:  Workshop on Handling of Seismic Events in Swedish PSAs »
Project Manager, NPSAG: Stefan Eriksson   Project Manager, External: Ola Bäckström, Tim Courtney   Start Year: 2013   Finish Year: 2013

36-003:  Cooperation with the IAEA on Fukushima related issues »
Project Manager, NPSAG: Göran Hultqvist

39-001:  Resultatpresentationsseminarium »
Project Manager, NPSAG: Stefan Eriksson   Project Manager, External: Ola Bäckström   Start Year: 2014   Finish Year: 2015

41-001:  Dependences in HRA »
Project Manager, NPSAG: Cilla Andersson   Project Manager, External: Xuhong He   Start Year: 2014   Finish Year: 2016

43-001:  Multi-Unit (MU) PSA »

44-002:  C Book and NAFCS Continuation »
  Project Manager, External: Gunnar Johanson   Start Year: 2014   Finish Year: 2016

53-001:  CCF Workshop »
  Project Manager, External: Gunnar Johansson   Start Year: 2018   Finish Year: 2018