Din avgränsning ger 569 träffar.
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2020:16 Estimates ofJ-integral and COD for circumferential through wall cracks under global bending including the effect of pipe end restraint
SSM perspective Background Leak-before-break (LBB) piping assessments have shown that piping systems can withstand long through-wall cracks before pipe rupture is expected. This is somewhat because pipe ends are restrained. In LBB assessments analyses are often performed for a pipe segment uncoupled from the piping system, as pipe ends are assumed unrestrained. This assumption is conservative...
Innehållstyp: Publikationer -
Anmälan om samråd vid överlåtelse av säkerhetskänslig verksamhet
SSM Svenska...
Innehållstyp: Publikationer -
2021:04 Calibration of models for cladding tube high-temperature creep and rupture in the FRAPTRAN-QT-1.5 program
SSM perspective Background The Swedish Radiation Safety Authority (SSM) follows the research on fuel performance closely. One aspect that is currently being studied in several research projects is the risk of release of fragmented fuel into the primary coolant in case of an accident. This risk depends on complex conditions where one is the possibility and size of a rupture of the fuel rod...
Innehållstyp: Publikationer -
2021:09 Mechanisms important for material modelling in weld residual stress analysis
SSM perspective Background The prediction of weld residual stresses (WRS) is very complex as many mechanisms and phenomena influence the development of WRS during welding. For accurate prediction, the constitutive material models used are essential and must be able to describe the material response of the weldment constituents. For example, selection of a material model should only depend on...
Innehållstyp: Publikationer -
2021:10 Establishment and use of attention values in environmental fatigue assessments
SSM perspective Background As Swedish NPPs reach their original technical design life, re-assessment of the fatigue life of structural components is needed for safe long term operation (LTO). In these re-assessments one must consider that new knowledge has shown that environmental effects on fatigue life must be considered. One common method to verify the fatigue life of structural components...
Innehållstyp: Publikationer -
2021:17 Inverkan från undergrund och bränslebassänger vid jordbävningsanalyser på svenska kokvattenreaktorer
SSM perspektiv Bakgrund Vattnet i en bassäng, såsom bränsle- och kondensationsbassänger i kärnkraftsreaktorer, har en stor inverkan på strukturens verkningssätt när en sådan konstruktion blir utsatt för seismiska laster. Vattnet bidrar med en ökad massa som sänker strukturens egenfrekvenser och dessutom ger det upphov till hydrostatiskt...
Innehållstyp: Publikationer -
2021:20 Effects of additives on UO2 fuel behavior: expanded edition
SSM perspective Background The Swedish Radiation Safety Authority (SSM) follows the development of nuclear fuel closely. Fuel with additives like chromia and gadolinia is used in Swedish reactors and fuel with even better thermal and mechanical properties is under development. This project is an in-depth study of data and models regarding the impact of additives on the properties of uranium...
Innehållstyp: Publikationer -
2021:25 Simulering av BWR normalvattenkemi
SSM perspektiv Bakgrund Primärsystemet i en kokvattenreaktor (BWR) såsom rörledningar och komponenter utgörs bland annat av rostfria stål och nickelbaslegeringar. Dessa material har påvisats att i olika grad kunna drabbas av interkristallin spänningskorrosionssprickning under de förutsättningar som råder i en BWR. Väl underbyggda samband mellan...
Innehållstyp: Publikationer -
2021:26 Interkristallin spänningskorrosion i nickelbaslegeringar i BWR- och PWR-miljö
En sammanställning av kunskapsläget med fokus på erfarenheter av studier genomförda i Sverige...
Innehållstyp: Publikationer -
2022:18 Data report – sampling of sea water and marine organisms outside Ringhals NPP
SSM perspective Background The Radiation Safety Authority (SSM) funded the collection of marine biota over an annual cycle at the Ringhals nuclear power plant (NPP) to enable development of analytical methods for C-14. Methods for the C-14 analysis and results in the form of levels of C-14 in various marine organisms have been reported by the Swedish Defense Research Institute (FOI) in FOI...
Innehållstyp: Publikationer