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Din avgränsning ger 47 träffar.

• 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 ... to a realistic variable amplitude loading with mainly reversed bending deformation and particular focus on high cycle fatigue. The previous fatigue results were quite dependent on the estimation of the...

  Innehållstyp: Publikationer

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

  force for crack growth near welds in nuclear application piping may arise from weld residual stresses. Experience from nondestructive examination show that cracks in dissimilar metal welds are often found ... increased plastic straining on the surfaces of the piping in contact with the light water reactor environment. This may in turn reduce the margin towards initiation of stress corrosion cracking. Objectives This...

  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 ... and responsible ministries. The main purpose of NKS is to finance joint Nordic activities and initiatives, including seminars and workshops, technical reports, exercises and scientific articles. Both radiation...

  Innehållstyp: Publikationer

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

  treatment of dependent failures is one of the most controversial subjects in reliability and risk analyses. The difficulties are specially underlined in the case of highly redundant systems, when the number ... number of redundant components or trains exceeds four. The 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...

  Innehållstyp: Publikationer

• 2017:34 Human capability to cope with unexpected events

  Background In the light of the Fukushima accident, it stood clear that the challenge of the unexpected is of great importance to both regulators and licensees. For SSM, as for many other national regulators ... regulators, there was a selfevident need to learn more about the capabilities and actions of people when the unexpected arises and conditions are potentially extreme. A task group was set up within the OECD/NEA's...

  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 ... (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 activity rate in Fennoscandia. The updated...

  Innehållstyp: Publikationer

• 2017:29 Evaluation of the simulation software CIVA for qualification purpose

  studies. SSM has supported university research in the area for many years and, among other things, in the development of a software for ultrasound modeling. In addition, the accredited NDE laboratories are ... commercially most successful software in simulation of NDT situations. The program according to the supplier can handle different materials, geometries, cladding and anisotropy in arbitrary symmetry and orientation...

  Innehållstyp: Publikationer

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

  Background Within the industry, there has long been a need to replace the traditional X-ray film and its handling. These both for economic and environmental considerations. Both computed radiography and ... traditional use of x-ray with film. However, the transition from film-based radiography requires in-depth knowledge of the relationship between these different methods. NUGENIA proposed in the ENIQ Task...

  Innehållstyp: Publikationer

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

  Background Loss of Coolant Accidents (LOCA) are among the most demanding accidents that can happen in a Light Water Reactor (LWR). The lack of cooling and the drop in pressure impose large stresses on ... increase the risk of fuel rod damage and the subsequent release of active material. But LOCA is also an accident that the nuclear power plant is designed to withstand with a limited release of radioactivity...

  Innehållstyp: Publikationer

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

  Technology in Sweden to analyze stainless steel pipe welds to obtain good estimations of weld residual stress (WRS) distributions. Detailed knowledge of the residual stress field in different types of welds ... have been performed by using 2-dimensinal finite element technique for a set of cases covering most stainless steel pipe welds in Swedish nuclear power plants, together with sensitivity studies with respect...

  Innehållstyp: Publikationer