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RO 77-14/3L:on 770524,reactor bldg isolation valve RB-V7 failed to close on engineering safeguards test signal, leading to operation in degraded mode permitted by limiting condition for operation per Tech Spec 3.6.6.

Accession Number: ML19261F334

Date Released: Wednesday, October 2, 2019

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• ML19261F333 - RO 77-14/3L:on 770524,reactor bldg isolation valve RB-V7 failed to close on engineering safeguards test signal, leading to operation in degraded mode permitted by limiting condition for operation per Tech Spec 3.6.6. (5 page(s), 6/20/1977)
• ML19261F335 - LER 77-014/03L:on 770524,during reactor bldg cooling & isolation sys logic channel & component test,reactor bldg cooling return isolation valve RB-V7 failed to close upon receipt of signal.Caused by dirt on valve diaphragm. (1 page(s), 6/23/1977)