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  • 2016:31 Measures and method characteristics for early evaluation of safe operation in nuclear power plant control room systems

    there is a need to develop evaluation methods in parallel with the development of control rooms in conjunction with construction modifications and other changes. This includes more indepth analysis of the methods ... conventional methods of evaluating control rooms and issues need to be reexamined. SSM has previously provided funding for several individual research projects regarding evaluation of control rooms. Both...

    Innehållstyp: Publikationer
  • 2016:26 Ensemble for deterministic sampling with positive weights

    The aim of this project is to find a reliable method for determining an ensemble for Deterministic Sampling with only positive weights. This report is intended to work as a presentation of the project ... as well as to work as a beginner’s guide to DS. In the report several methods for generating DS ensembles are presented, which can encode up to four moments and represent any kind of probability distribution...

    Innehållstyp: Publikationer
  • 2016:29 Evaluation of the Swedish participation in the Halden Reactor Project 2006–2014

    This is a report on the evaluation of the Swedish participation in the Halden Reactor Project 2006-2014. The study has consisted in evaluating the types and extent of added value from the Swedish participation ... participation in the Halden Reactor Project, and to determine what additional added value the participation could supply for the Swedish authority. It can be concluded from the study that the impacts from...

    Innehållstyp: Publikationer
  • 2016:27 Validation of fatigue fracture mechanics approaches

    Background In a previous study (SSM research report 2015:38) fatigue experiments were performed on welded austenitic stainless steel piping components. The fatigue experiments offer an opportunity to evaluate ... evaluate fatigue flaw tolerance assessments used in industry, which are based on the fracture mechanical approach implemented in ProSACC. Objective The present study aims to validate the used fatigue flaw...

    Innehållstyp: Publikationer
  • 2016:04 Uncertainty assessment of the SCANAIR V_7_5 computer program in analyses of BWR reactivity initiated accidents

    In this work, we assess uncertainties that can be expected in computational analyses of boiling water reactor reactivity initiated accidents with the SCANAIR V_7_5 computer program. The work is intended ... intended to supplement a similar uncertainty assessment, focussed on pressurized water reactor accidents, which is currently being organized as an international benchmark exercise by the OECD Nuclear Energy...

    Innehållstyp: Publikationer
  • 2016:28 Fatigue fracture surface characterization and investigation

    Background In a previous study (SSM research report 2015:38) fatigue experiments were performed on welded austenitic stainless steel piping components. The fatigue experiments offer an opportunity to examine ... examine the obtained fatigue cracks with an optical microscope. Objective The present study performs a fractographical examination of the obtained fatigue cracks with the aim of determine where fatigue cracks...

    Innehållstyp: Publikationer
  • 2016:35 Säkerhetsvärdering mot plastisk kollaps vid skadetålighetsanalyser

    anläggningar utgår från den brittiska R6-metoden men är vidareutvecklad för att ha ett säkerhetsvärderingssystem som är kompatibelt med säkerhetskraven som uttrycks i den amerikanska tryckkärlsstandarden ... genomförande av skadetålighets-analyser för rörsystem. Vid uppdateringen utfördes flera stora förändringar kring hur säkerhetsvärderingen gentemot plastisk kollaps hanteras. Bl.a. infördes en ny flytspänningsdefinition...

    Innehållstyp: Publikationer
  • 2016:13 Spännarmerade betongkonstruktioner vid kärntekniska anläggningar

    Projektet omfattar en litteraturstudie och inventering av byggteknik, dimensionering, degradering och inspektionsmetoder för spännkabelsystem i reaktorinneslutningar och bassängkonstruktioner. ... dimensionering, degradering och inspektionsmetoder för spännkabelsystem i reaktorinneslutningar och bassängkonstruktioner. Kunskap om spännkabelsystemen är av stor betydelse för bedömning av konstruktionernas...

    Innehållstyp: Publikationer