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[en] KKL has experienced fuel failures in 4 of 8 cycles operated. These failures were detected by an increase in plant activity. The failures occurring in cycles 2 and 4 were typical PCI failures caused by overpowers during manoeuvres. The failures were located with partial and full core flux tilting methods. The cycles 5 and 7 barrier clad failures were classified as manufacturing defects due to presence of incipient cladding flaws not detected by the manufacturing control. The failures showed severe secondary deteriorations and caused unusually high activity releases. All KKL failed fuel rods were inspected both visually and with non-destructive testing directly after discharge. 7 refs, 16 figs, 2 tabs
Source
International Atomic Energy Agency, Vienna (Austria); 288 p; ISSN 1011-4289; 
; Jun 1993; p. 156-168; Technical committeee meeting on fuel failure in normal operation of water reactors: Experience, mechanisms and management; Dimitrovgrad (Russian Federation); 26-29 May 1992
; Jun 1993; p. 156-168; Technical committeee meeting on fuel failure in normal operation of water reactors: Experience, mechanisms and management; Dimitrovgrad (Russian Federation); 26-29 May 1992