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Din avgränsning ger 34 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

• 2017:15 Radionuclide release rates associated with bounding cases featuring relatively early canister failures in a spent fuel repository

  Swedish Radiation Safety Authority (SSM) for five years. During the review SSM commissioned the Southwest Research Institute (SwRI) to develop a model independent of SKB’s model to simulate the canister failure ... to isostatic load. SwRI built up the model based on their understanding of SKB’s model description. From SwRI’s modelling it could be confirmed that SKB’s modelling results were relatively consistent with...

  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

• 2017:34 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

• 2017:02 Slow strain rate testing of copper in sulfide rich chloride containing deoxygenated water at 90 °C

  conducted to a certain level of strain where after presence of cracking on the specimen surface were evaluated. Results Based on the results in this study, SCC in oxygen free copper material intended for ... threshold value of approximately 160 MPa. At lower sulfide concentration (~1·10−4 M), no SCC was observed on specimens. To some degree these results are consistent with other results found in the literature,...

  Innehållstyp: Publikationer

• 2017:11 Extended Common Load Model: A tool for dependent failure modelling in highly redundant structures

  Common Load Model (CLM), originally defined in the 70’ies, differs from other CCF models, as it relies on a specific physical analogy. The model was extended in late 80’ies with specific aims to model highly ... before. However, it has been developed with certain funding via the Nordic PSA group (NPSAG) including SSM. It has therefore been an interest to have the method properly documented and published. The objective...

  Innehållstyp: Publikationer