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Din avgränsning ger 40 träffar.

• 2017:22 Effect of weld repairs on residual stresses in nickel base dissimilar metal welds

  affect the residual stresses through e.g. increased tensile stresses and increased plastic straining on the surfaces of the piping in contact with the light water reactor environment. This may in turn reduce ... by numerical simulation with two dimensional axi-symmetric assumptions. Conclusions are drawn based on comparison of the weld residual stresses before and after weld repair. The results show that the inside...

  Innehållstyp: Publikationer

• 2017:12 Computational assessment of LOCA simulation tests on high burnup fuel rods in Halden and Studsvik

  in a Light Water Reactor (LWR). The lack of cooling and the drop in pressure impose large stresses on the nuclear fuel which would increase the risk of fuel rod damage and the subsequent release of active ... 5 (see SSM report 2015:37). Objective This report describes the validation of the models against tests performed in Halden and in Studsvik, the latter commissioned by NRC. The objective for SSM in this...

  Innehållstyp: Publikationer

• 2017:36 Topical Peer Review 2017 Ageing Management Swedish National Assessment Report

  Executive summary The European Union’s Nuclear Safety Directive 2014/87/EURATOM (NSD) requires the member states to undertake topical peer reviews (TPR) every 6 years with the first starting in 2017. The ... topic for the first topical peer review is ageing management. The Swedish Radiation Safety Authority (SSM) by the provision of the act of nuclear activities (1984:3) can decide by injunction that licensees...

  Innehållstyp: Publikationer

• 2017:20 Assessment of inertia effects on transient clad-to-coolant heat transfer and coolant flow under reactivity initiated accidents

  In this report, simple hydrodynamic models are used for studying the effects of coolant inertia on fuel-to-coolant heat transfer and coolant flow under reactivity initiated accidents in light water reactors ... SCANAIR fuel rod analysis program. The results of our study suggest that inertia has a negligible impact on the growth kinetics of the continuous vapour film that forms between the fuel rod cladding tube and...

  Innehållstyp: Publikationer

• 2017:09 Evaluation of the Swedish participation in the Nordic Nuclear Safety Research (NKS) collaboration

  Background NKS is a Nordic collaboration promoting cooperation on nuclear safety and emergency preparedness research. The research program is primarily funded by Nordic radiation safety authorities and ... technical reports, exercises and scientific articles. Both radiation safety authorities, industries and research actors are engaged in NKS projects. Objective This is a report on the evaluation of the Swedish...

  Innehållstyp: Publikationer

• 2016:39 Recommended residual stress profiles for stainless steel pipe welds

  Background The Swedish Radiation Safety Authority (SSM) and the Swedish nuclear power plant owners have financed Inspecta Technology in Sweden to analyze stainless steel pipe welds to obtain good estimations ... distributions. Detailed knowledge of the residual stress field in different types of welds is important since they can have substantial influence on degradation mechanisms such as stress corrosion cracking...

  Innehållstyp: Publikationer

• 2017:32 COMRAD – Comprehensive investigation of the performance of computed and digital radiography

  knowledge of the relationship between these different methods. NUGENIA proposed in the ENIQ Task Group on Qualifications Working Group a joint venture project under the name COMRAD. A number of parameters ... parameters in this test area and for optimization of defect content in the manufacture of test blocks. SSM's objectives contributing within this project have been to build up expertise in digital radiography...

  Innehållstyp: Publikationer

• 2017:25 Evaluation of weld fatigue reduction in austenitic stainless steel pipe components

  Background The performed investigation is a continuation of the work performed in SSM 2015:38 where fatigue tests were performed on pressurized welded austenitic stainless steel piping components. The specimens ... with mainly reversed bending deformation and particular focus on high cycle fatigue. The previous fatigue results were quite dependent on the estimation of the stress concentration factor of the weld.

  Innehållstyp: Publikationer

• 2017:35 Review of paleo-, historical and current seismicity in Sweden and surrounding areas with implications for the seismic analysis underlying SKI report 92:3

  Abstract The report contains a review of the current state of knowledge on Swedish paleoseismic events, as well as information on the Swedish earthquake catalogue updated to early autumn 2016 and the revised ... revised Nordic earthquake catalogue (Fencat). It includes a section on the possibilities to assess spatial and temporal variations in seismicity, given the sparse early catalogues and the low earthquake...

  Innehållstyp: Publikationer

• 2017:34 Human capability to cope with unexpected events

  that the challenge of the unexpected is of great importance to both regulators and licensees. For SSM, as for many other national regulators, there was a selfevident need to learn more about the capabilities ... OECD/NEA's Working Group for Human and Organizational Factors (WGHOF) in order to further the understanding of "Human Intervention and Performance in Extreme Conditions". The purpose of the SSM research...

  Innehållstyp: Publikationer