Evaluación de procedimientos desde la perspectiva probabilistica para la seguridad nuclear: aplicación a un reactor Westinghouse PWR
- Autores: Manuel Martínez Cid
- Directores de la Tesis: Carlos Tapia Fernández (dir. tes.), Javier Dies Llovera (dir. tes.)
- Lectura: En la Universitat Politècnica de Catalunya (UPC) ( España ) en 2012
- Idioma: español
- Tribunal Calificador de la Tesis: Gumersindo Verdú Martín (presid.), Lluís Batet (secret.), Eduardo Gallego Díaz (voc.)
- Materias:
- Enlaces
- Tesis en acceso abierto en: TDX
- Resumen
Probabilistic Risk Assessment for the evaluation of procedures in the Nuclear Safety field. Application to a pressurized water reactor. The studies contained in this PhD are involved in the Nuclear Safety research field. Both are related to the Risk Informed philosophy with the improvement of the risk decision-making as a main target. Probabilistic Safety Assessment is the main tool for the development of the PhD and it is also the common research field for the assessment of its applications and limitations. The Nuclear Engineering Research Group (NERG) in the Technical University of Catalonia (UPC) decided to research in the development of new techniques and methodologies for a better assessment of the nuclear safety.The carried out studies contained in the PhD are based on a three loops Westinghouse Pressurised Water Reactor (PWR). Plant documentation (operation instructions, procedures, design basis, databases, safety studies, technical specifications, etc.) as well as scientific reviews; have made possible the achievement of the results and publications related to the PhD. The safety standards of the Nuclear Regulatory Commission (NRC) and the International Atomic Energy Agency (IAEA) have always been taken into account during the research. The thesis consists of two main parts: I) Quantification of the Outage Key Safety Functions using the Probabilistic Safety Assessment. II) Risk assessment of the spent fuel pool associated risk from the probabilistic view. The first study is based on the risk quantification of a deterministic procedure using the Probabilistic Safety Assessment. The analysed procedure contains the key safety functions during the outage. The result is the creation of a methodology which gives values to risk associated to the non-compliance of the key safety functions. It makes easier the decision-making during the plant operation. Second part, consists first in the development of the Probabilistic Safety Assessment (PSA) of a spent fuel pool. It is a Level 1 PSA containing all tasks for the performance of the study: Initiating events analysis, scenarios and consequences quantification, human reliability analysis, etc. Afterwards, using the developed PSA, the interaction with the deterministic analysis begins. Risk associated to design, technical specifications, operation and procedures is quantified. Again, the interaction between both risk assessment philosophies as a main find of this PhD is achieved. The evaluation of risk associated to deterministic studies using probabilistic tools makes possible the detection weaknesses in both techniques. Some of the numerical values presented in that thesis, may be slightly different to their real quantification result. Some of the technical names of components or systems may also defer. That is because of the existing data confidentiality associated to the project agreement.
