Optimización de la Política de Mantenimiento Preventivo del Sistema de Inyección de Alta Presión de un Reactor Nuclear Típico Usando un Modelo de Confiabilibilidad y Costos (Preventive Maintenance Policy Optimization of a Nuclear Reactor High Pressure Injection System Using a Reliability-Cost Model)

Celso M. Franklin Lapa (lapa@ien.gov.br)1, Cláudio M. N. A. Pereira2, Paulo F. Frutuoso e Melo (frutuoso@lmn.con.ufrj.br)2

1Instituto de Engenharia Nuclear IEN/CNEN, Brasil
2COPPE/UFRJ - Nuclear

This paper appears in: Revista IEEE América Latina

Publication Date: April 2005
Volume: 3,   Issue: 2 
ISSN: 1548-0992

Previous works have demonstrated that Genetic Algorithms (GA) and Probabilistic Safety Analysis (PSA) can be applied to maintenance policy optimization problems. Here, the flexible scheduling approach proposed in former works has been enhanced. Now, operational costs are considered in the objective function, resulting in a Reliability-Cost model for evaluating industrial systems performance. The GA searches for optimum preventive maintenance policies, which considers factors, such as: probability of needing a repair, costs of related to the repair, outage times, etc. A typical Pressurized Water Reactor High Pressure Injection System has been chosen as a case study. Results ratify the good performance of the method, allowing specific analysis on the weighting factors related to costs and reliability.

Index Terms:
Maintenance Policy Optimization, Genetic Algorithms, Cost Model, Reliability   

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