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Din avgränsning ger 11 träffar.

• 2014:30 Modelling Approaches to C-14 in Soil-Plant Systems and in Aquatic Environments

  carbon biogeochemistry already exists in the fields of plant physiology and aquatic ecology and therefore is it beneficial to draw on this to identify the important issues. A paper describing the BIOPROTA C-14 ... C-14 model inter-comparisons, and plans for the forward programme was published in Radiocarbon Journal. Further studies on C-14 (including modelling, model inter-comparisons, and experimental work) have...

  Innehållstyp: Publikationer

• 2014:28 Numerical simulation of ductile crack growth in residual stress fields

  The study has shown on the capability of the cell model in capturing the effects on ductile tearing from limited pre-load levels and a residual stress field. Some of the conclusions are as follows: No distinctive ... compressive, at room temperature of 1.5 or 3 % total strain. The cell model gives good predictions of the experimentally generated JR-curves for pre-load levels up to 3% in compression and tension. As for...

  Innehållstyp: Publikationer

• 2014:26 Improved reference and relative dosimetry of small radiation therapy photon beams

  Data tables on detector corrections for beam output measurements are provided for a large number of detectors (small air and liquid ionization chambers, silicon diodes, TLD and alanine) manufactured by ... have been calculated with the PENELOPE Monte Carlo system at an uncertainty of 0.1%. Their comparison with other published data has enabled the determination of the overall uncertainty in the data available...

  Innehållstyp: Publikationer

• 2014:09 Further Development of the Core Simulator CORE SIM: Extension to coupled capabilities for BWRs

  requires a set of input data from a commercial static core simulator. The driving perturbation can be specified both as a perturbation in thermo-hydraulic parameters or directly as a perturbation in macroscopic ... distribution of the noise in coolant density, pressure, enthalpy, inlet velocity, fuel temperature and neutron flux is obtained. In this work, some results of the noise simulations, performed for the case of a homogeneous...

  Innehållstyp: Publikationer

• 2014:20 An evaluation of high-temperature creep of zirconium alloys: data versus models

  In this report Dr Massih presents correlations for creep in different phases of zirconium alloys and also presents a general solution to the difficulty of accurately describing the material properties ... properties in phase transition for several zirconium alloys. Based upon superplasticity relations, models are adapted to fit with experimental data for materials in transition regions. The creep models are developed...

  Innehållstyp: Publikationer

• 2014:19 Evaluation of the Halden IFA-650 loss-of-coolant accident experiments 5, 6 and 7

  use and develop, contain models of several of the phenomena that are acting on the nuclear fuel (cladding temperature, fission gas driven pressure, strain and stress in the cladding, rod rupture, etc.) ... separate effects interact in the complex integrated manner. The codes are under constant development and need to be compared with actual tests. In this report simulations of three tests in Halden (IFA-650.5,6...

  Innehållstyp: Publikationer

• 2014:18 Evaluation of the Halden IFA-650 loss-of-coolant accident experiments 2, 3 and 4

  use and develop, contain models of several of the phenomena that are acting on the nuclear fuel (cladding temperature, fission gas driven pressure, strain and stress in the cladding, rod rupture, etc.) ... separate effects interact in the complex integrated manner. The codes are under constant development and need to be compared with actual tests. In this report simulations of three tests in Halden (IFA-650.2,3...

  Innehållstyp: Publikationer

• 2014:21 Effects of additives on uranium dioxide fuel behavior

  This report will form a basis for the reviews that SSM does when the license holders applies for use of nuclear fuel with additives. The report is also intended as a reference to the models that Quantum ... Technologies AB has developed. The report and the models will be a valuable source of information for SSM and other parties when discussing the performance of doped fuel. Ali Massih SSM English...

  Innehållstyp: Publikationer

• 2014:31 Degradering i betong och armering med avseende på bestrålning och korrosion

  driftsförlängningar av de svenska reaktorerna. Kunskap om huruvida betongen i kärnkraftverk degraderas av bl.a. bestrålning och korrosion är av stor vikt. Strålningsintensitet, typ av strålning, exponeringstid och ... elektriska fält är av vikt när betongstrukturens strukturella integritet ska bedömas. Rapporten beskriver bl.a. följande: Materialet betong och dess degraderingsmekanismer Läckströmskorrosion på armering Allmänt...

  Innehållstyp: Publikationer

• 2014:13 Förutsättningar för att upprätthålla och utveckla en välfungerande verksamhet kring erfarenhetsåterföring

  största hindren inom de studerade kärnkraftverken ligger i tids- och resursbrist samt i avsaknad av systemstöd och metoder för utvärdering. Processerna förefaller fungera förhållandevis väl när det gäller att ... åtgärder. Studien tar upp ett antal grundläggande förutsättningar för att upprätthålla effektiva system för erfarenhetsåterföring samt övergripande rekommendationer för utformning och implementering av...

  Innehållstyp: Publikationer