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2013:10 Qualification of Electrical Equipment in Nuclear Power Plants - Management of ageing
purpose of this report is to describe programs and tools for assessment of accomplished and documented qualification with respect to ageing of electrical equipment and for development of complimentary ageing ... of ageing, tools for validation of the status with regard to ageing of installed (“old”) equipment and, where needed, for complementation of their qualification are also included. The report is restricted...
Content type: Publications -
2013:09 An Application of the Functional Resonance Analysis Method (FRAM) to Risk Assessment of Organisational Change
in combination, resilience engineering focuses on the common functions and processes that provide the basis for both successes and failures. Resilience engineering more precisely proposes that failures ... necessary to cope with the real world complexity rather than a failure of normal system functions and that a safety assessment therefore should focus on how functions are carried out rather than on how...
Content type: Publications -
2013:08 Licensing of safety critical software for nuclear reactors
be limited to verification and testing of the end product, i.e. the computer code. Other factors such as the quality of the processes and methods for specifying, designing and coding have an important impact ... guidance on the regulatory and safety assessment of these factors. An undesirable consequence of this situation is that the licensing approaches taken by nuclear safety authorities and by technical support organisations...
Content type: Publications -
2013:07 Corrosion of copper in distilled water without molecular oxygen and the detection of produced hydrogen
copper surfaces after exposure have been performed ex-situ, meaning after termination of the experiment and exposing the specimen to normal atmospheric environment. Ideally characterisation of surfaces should ... specimens between exposure and surface analysis. The results from the surface analysis of exposed copper specimens indicate that the reaction products are predominately comprised of oxide and hydroxide. Furthermore...
Content type: Publications -
2013:06 The sixth round of implementation according to PARCOM recommendation 91/4 – Report from Sweden
technology (BAT) in order to minimise and, as appropriate, eliminate any pollution caused by radioactive discharges from all nuclear industries, including research reactors and reprocessing plants, into the marine ... nuclear power plant, which discharges in close proximity to the Convention waters. BAT for the reduction and prevention of radioactive discharges is applied at the Ringhals nuclear power plant during the time...
Content type: Publications -
2013:04 Research and Development Program in Reactor Diagnostics and Monitoring with Neutron Noise Methods, Stage 18
perturbations, in various thermal and fast reactor systems, in two-group theory; A consistent derivation of the point kinetic term of the noise in circulating fuel reactors and an analysis of the of the deviation ... simulate bubbly two-phase flow with axially dependent void fraction and void velocity. Imre Pázsit, Tran Hoai Nam, Victor Dykin and Anders Jonsson SSM English The program executed in Stage 18 consists...
Content type: Publications -
2013:01 Validation of Weld Residual Stress Modeling in the NRC International Round Robin Study
stresses (WRS) have a large influence on the behavior of cracks growing under normal operation loads and on the leakage flow from a through-wall crack. Accurate prediction on weld residual stresses is important ... years, there has been a strong development in both analytical procedures to numerically determine WRS and experimental measurements of WRS. The USNRC (United States Nuclear Regulatory Commission) has formed...
Content type: Publications -
2012:71 Identification of Brittle Deformation Zones and Weakness Zones
In preparation for the review of Swedish Nuclear Fuel and Waste Management Company’s (SKB) license application for disposal of spent nuclear fuel, Swedish Radiation Safety Authority (SSM) is conducting ... 500 m depth and embedded in bentonite clay. Thus, the rock, the clay and the copper canister are acting as barriers in order to retard the possibility of spent fuel to escape the repository and reach the...
Content type: Publications -
2012:70 Process Parameters Affecting Inhomogeneity of Material Microstructure
There’s been a tremendous change in the number, product types, locations, equipment, and manufacturing capabilities of stainless steel producers from the late 1960’s to present. This reconfiguration of ... early 1970’s to the mid 1980’s and continues today. These changes have produced a loss in manufacturing flexibility, due to the inherent constraints created by equipment and plant designs that were customized...
Content type: Publications -
2012:68 Assessment of cost for dismantling of Ringhals 2 PWR
Swedish Nuclear Waste Fund (SNWF). Transparency of and confidence in the process to ensure collection of sufficient funds is fundamental for the acceptance and sustainability of the Swedish model for estimating ... cost of dismantling the Trojan NPP in the U.S. and supported by other benchmark data derived from U.S. dismantling projects underway or completed at the Zion and Rancho Seco NPPs. The conclusions of the study...
Content type: Publications