Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Climatic conditions inside nuclear reactor containments - Monitoring campaign
The reactor containment is one of the most important buildings at a nuclear power plant. In case of an accident the containment wall is the final protection against radioactive leakage to the surrounding environment. A reactor containment contains different types of concrete structures. They can be grouped as external structures constituting a barrier between the inside of the containment and the outside environment, and internal structures e.g. to sectionalize the internal space of the containment and the biological shield. Concrete structures in reactor containments are e.g. used as load bearing structures, protection of the steel liner from e.g. corrosion and to adsorb radioactive nuclides. During operation the climatic conditions inside the reactor containment can be harsh, with temperatures over 50 °C and low relative humidities (RH). Knowledge about the condition in the containment and in the concrete structures is thereby important in order to evaluate the condition of the reactor containment and possible changes over time. The objective of this dissertation is to present a measurement setup suitable for long term measurements in concrete and investigate how the climatic conditions inside the reactor containments affect the concrete structures and vice versa. The project is divided into three parts in which the first part contains a material study of concrete from one nuclear reactor containment. The results from the material study showed that no clear variation of moisture transport properties over the depth of a structure could bee observed. The findings will be of great value in the continuation of the PhD project which will follow this Licentiate project, in which a model to predict future and past moisture conditions in the concrete will be developed. In the second part an accuracy evaluation of a measurement setup is presented. The setup was used to measure the RH and temperature onsite. In the accuracy evaluation the effects of both leakage through the setup and temperature were evaluated. The ...
Climatic conditions inside nuclear reactor containments - Monitoring campaign
The reactor containment is one of the most important buildings at a nuclear power plant. In case of an accident the containment wall is the final protection against radioactive leakage to the surrounding environment. A reactor containment contains different types of concrete structures. They can be grouped as external structures constituting a barrier between the inside of the containment and the outside environment, and internal structures e.g. to sectionalize the internal space of the containment and the biological shield. Concrete structures in reactor containments are e.g. used as load bearing structures, protection of the steel liner from e.g. corrosion and to adsorb radioactive nuclides. During operation the climatic conditions inside the reactor containment can be harsh, with temperatures over 50 °C and low relative humidities (RH). Knowledge about the condition in the containment and in the concrete structures is thereby important in order to evaluate the condition of the reactor containment and possible changes over time. The objective of this dissertation is to present a measurement setup suitable for long term measurements in concrete and investigate how the climatic conditions inside the reactor containments affect the concrete structures and vice versa. The project is divided into three parts in which the first part contains a material study of concrete from one nuclear reactor containment. The results from the material study showed that no clear variation of moisture transport properties over the depth of a structure could bee observed. The findings will be of great value in the continuation of the PhD project which will follow this Licentiate project, in which a model to predict future and past moisture conditions in the concrete will be developed. In the second part an accuracy evaluation of a measurement setup is presented. The setup was used to measure the RH and temperature onsite. In the accuracy evaluation the effects of both leakage through the setup and temperature were evaluated. The ...
Climatic conditions inside nuclear reactor containments - Monitoring campaign
Oxfall, Mikael (Autor:in)
01.01.2013
Hochschulschrift
Elektronische Ressource
Englisch
DDC:
624
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