Reliability of PHT Piping System in PHWR against Erosion Corrosion
Volume 4, Number 1, January 2008 - Paper 7 - pp. 85 - 94
A. SRIVIDYA1, H.N. SURESH1, A.K. VERMA1 and GOPIKA VINOD21Reliability Engineering Group, Indian Institute of Technology Bombay,
Powai, Mumbai 400 076, India
2Scientist, RSD, BARC, Mumbai
(Received on December 31, 2006)
Erosion corrosion (EC), also referred to as Flow Accelerated Corrosion (FAC), is one of the major degradation mechanisms in Primary Heat Transport (PHT) piping system of Pressurized Heavy Water Reactor (PHWR) and therefore needs to be addressed in assessing reliability of piping system. In this paper, an existing model is used to find the FAC rate in the straight and elbow section of an outlet feeder. The effect of various factors affecting FAC is highlighted. Deterministic method is first used to evaluate the FAC rate and probabilistic method is applied to evaluate the reliability of the system under consideration. The point estimate of reliability of the piping component is illustrated, considering the components to be in series.
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