The owners of the Forsmark and Ringhals nuclear power plants in Sweden have taken a <a href="https://group.vattenfall.com/press-and-media/pressreleases/2024/forsmark-and-ringhals-nuclear-power-plants-aim-for-80-years-of-operation-of-existing-reactors">directional decision</a> to extend the operating lifetime of the plants' reactors from 60 to 80 years. An in-depth investigation phase awaits, which will include more detailed  calculations and analysis before investment decision can be made. To extend the operating time, investments are necessary to replace or renovate systems and components, including plant buildings and other infrastructure.The objective of this thesis is to study how to ensure a safe and sustainable operational lifetime extension of plant buildings and other infrastructure.Subject:Stability assessment of slender reinforced concrete walls using multiple analysis tools and EC2 standard generations. Potential analysis methods of interest are:<ul><li>Simplified method based on nominal curvature</li><li>Second order linear elastic analysis method based on reduced stiffness value.</li><li>A general fully non-linear analysis method</li></ul>A study case will be provided. Goal:The following objectives can be defined:<ol><li>To compare the different analysis methods in terms of result and ease of implementation in commercial finite element analysis programs.</li><li>To evaluate the effect of concrete creep, and study how the effect of creep can be evaluated for existing structures and temporary design situations. </li><li>Discuss differences between the EC2:2005 and EC2:2023</li></ol>This thesis is suitable for one or two students.The work will be conducted in collaboration with Vattenfall Power Solutions (VPS), which aims to support Vattenfall’s partners in delivering safe and sustainable energy solutions from both a near-term and long-term perspective.

Vattenfall is a European energy company with approximately 20,000 employees. For more than 100 years we have electrified industries, supplied energy to people's homes and modernised our way of living through innovation and cooperation. We are working for fossil freedom.&nbsp;

Thesis Work - Stability assessment of slender reinforced concrete walls

The owners of the Forsmark and Ringhals nuclear power plants in Sweden have taken a <a href="https://group.vattenfall.com/press-and-media/pressreleases/2024/forsmark-and-ringhals-nuclear-power-plants-aim-for-80-years-of-operation-of-existing-reactors">directional decision</a> to extend the operating lifetime of the plants' reactors from 60 to 80 years. An in-depth investigation phase awaits, which will include more detailed&nbsp; calculations and analysis before investment decision can be made. To extend the operating time, investments are necessary to replace or renovate systems and components, including plant buildings and other infrastructure.The objective of this thesis is to study how to ensure a safe and sustainable operational lifetime extension of plant buildings and other infrastructure.Subject:Stability assessment of slender reinforced concrete walls using multiple analysis tools and EC2 standard generations. Potential analysis methods of interest are:<ul><li>Simplified method based on nominal curvature</li><li>Second order linear elastic analysis method based on reduced stiffness value.</li><li>A general fully non-linear analysis method</li></ul>A study case will be provided.&nbsp;Goal:The following objectives can be defined:<ol><li>To compare the different analysis methods in terms of result and ease of implementation in commercial finite element analysis programs.</li><li>To evaluate the effect of concrete creep, and study how the effect of creep can be evaluated for existing structures and temporary design situations.&nbsp;</li><li>Discuss differences between the EC2:2005 and EC2:2023</li></ol>This thesis is suitable for one or two students.The work will be conducted in collaboration with Vattenfall Power Solutions (VPS), which aims to support Vattenfall’s partners in delivering safe and sustainable energy solutions from both a near-term and long-term perspective.

Thesis Work - Stability assessment of slender reinforced concrete walls

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