Search for dissertations about: "pressure vessel steel"
Showing result 1 - 5 of 8 swedish dissertations containing the words pressure vessel steel.
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1. Radiation Induced Precipitation in Reactor Pressure Vessel Steel Welds
Abstract : Radiation induced clustering and precipitation affect the mechanical properties of the reactor pressure vessel (RPV) of a nuclear power plant, i.e. the material becomes embritteled. The combination of low Cu (0. READ MORE
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2. Microstructural aspects of the ductile-to-brittle transition in pressure vessel steels
Abstract : .... READ MORE
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3. Effects of Irradiation and Thermal Ageing on the Nanoscale Chemistry of Steel Welds
Abstract : Structural materials of nuclear power plants degrade during operation due to thermal ageing and irradiation from the reactor core. Effects on the materials are an increase in hardness and tensile strength, and a decrease in ductility and fracture toughness, i. e. embrittlement. READ MORE
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4. Modelling and Simulation of Reactor Pressure Vessel Failure during Severe Accidents
Abstract : This thesis aims at the development of new coupling approaches and new models for the thermo-fluid-structure coupling problem of reactor pressure vessel (RPV) failure during severe accidents and related physical phenomena. The thesis work consists of five parts: (i) development of a three-stage creep model for RPV steel 16MND5, (ii) development of a thermo-fluid-structure coupling approach for RPV failure analysis, (iii) performance comparison of the new approach that uses volume loads mapping (VLM) for data transfer with the previous approach that uses surface loads mapping (SLM), (iv) development of a lumped-parameter code for quick estimate of transient melt pool heat transfer, and (v) development of a hybrid coupling approach for efficient analysis of RPV failure. READ MORE
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5. Fracture toughness properties of duplex stainless steels
Abstract : Good toughness properties in base and weld material enable the use of duplex stainless steels (DSS) in critical applications. DSS offer high strength compared to common austenitic stainless steels. READ MORE