Steam generator tube failure, detection

Inadequate detection of the potential leaks through the steam generator tubes could result in significant tube failures during operation. 

Successful operation of steam generator (SG) holds the key to achievement of high capacity factors. SG requires the high quality during manufacture and a sensitive leak detection system for sodium-water reaction detection and mitigation. PFR incident of failure of 40 tubes of superheater has led to redefinition of design basis leak for SG from the earlier considered incident of double ended rupture of one tube [6]. 

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