Sök

Din avgränsning ger 336 träffar.

• 2020:11 Competency based assessments of Nuclear Power Plant controlroom operators

  Experiences of development and first operational methodological and technical demonstrator application...

  Innehållstyp: Publikationer

• 2020:12 Assessment of the QT-COOL coolant channel module against the PBF RIA 1-2 experiment

  SSM perspective Background The fuel rod analysis program SCANAIR has been developed by IRSN (Institut de Radioprotection et de Sûreté Nucléaire) for analysis of reactivity initiated accidents (RIA) in light water reactors. The Swedish Radiation Safety Authority (SSM) has access to SCANAIR in exchange for annual contributions for its further development. This ensures a possibility...

  Innehållstyp: Publikationer

• 2020:07 Fibre Clogging in Nuclear Power Plants

  SSM perspective Background Emergency core cooling systems in boiling- and pressurized water reactors use strainers. Their purpose is to out foreign material suspended in the cooling water so this material does not reach the reactor. After the 1992 event at Barsebäck nuclear power plant when the strainers of the emergency cooling system was clogged due to fibers in the cooling water, all...

  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. The objective is to assess if the inertia effects are important enough to warrant modification of QT-COOL, a coolant channel module for two-phase flow that has recently been implemented as...

  Innehållstyp: Publikationer

• 2017:16 Stress intensity factor solutions for circumferential cracks in cylindrical bars under axisymmetric loading and global bending

  Background The case of a circumferential crack in a cylindrical bar has not been available in the ProSACC code. The need for such a geometry, especially considering nonlinear axisymmetric loading and global bending, has motivated the development of new stress intensity factor solutions, also known as K-solutions. These new K-solutions will be available in ISAAC, the successor to ProSACC.

  Innehållstyp: Publikationer

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

  Background Modeling is an important tool within NDT, partly to develop and optimize testing technologies, but also within the Qualification Body’s activities to assess technical verifications and perform parameter 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...

  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 digital radiography offer many advantages over the traditional use of x-ray with film. However, the transition from film-based radiography requires in-depth knowledge of the relationship...

  Innehållstyp: Publikationer

• 2023:15 Numerisk analys av restspänningar i bandpåsvetsad plätering i svenska reaktortryckkärl

  Strålsäkerhetsmyndighetens perspektiv Bakgrund Reaktortryckkärl tillverkas vanligtvis av låglegerade ferritiska stål som på insidan beläggs med ett eller flera lager av rostfritt stål, så kallad plätering eller på engelska cladding. Den rostfria pläteringen påverkar den strukturella integriteten på flera sätt, dels har...

  Innehållstyp: Publikationer

• 2024:04 Kunskapssammanställning omfattande seismisk tålighet och analys av strukturer och komponenter i svenska kärntekniska anläggningar

  SSM Perspektiv Bakgrund Äldre svenska kärnkraftsreaktorer byggdes utan krav på seismisk dimensionering. Reaktorernas tålighet mot jordbävningar kontrollerades i efterhand med jordbävningsspektra som togs fram i början av 1990-talet inom ett samarbetsprojekt mellan dåvarande myndigheten Statens kärnkraftinspektion (SKI) och kärnkraftsindustrin.

  Innehållstyp: Publikationer

• 2024:06 In search of lost storms: or can one infer the magnitudes of extremely rare flood events from short observational records?

  SSM perspektiv Bakgrund Kärnkraftverken, övriga kärntekniska anläggningar och andra verksamheter som acceleratorerna ESS och MAX IV ska kunna motstå yttre händelser, såsom väderfenomen, i sådan omfattning att säkerhetssystemens förmåga att utföra sina uppgifter inte äventyras. Fukushima-olyckan i Japan 2011 är ett exempel...

  Innehållstyp: Publikationer