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Forwards LERs 86-091-00,86-092-00,86-093-00 & 86-094-00.

Accession Number: ML20209A737

Date Released: Monday, August 10, 2020

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• ML20209A731 - Forwards LERs 86-091-00,86-092-00,86-093-00 & 86-094-00. (1 page(s), 1/27/1987)
• ML20209A825 - LER 86-091-00:on 861228,nuclear steam supply shutoff sys Div 2 balance-of-plant isolation occurred when power supply breaker for isolation actuation relays inadvertently opened. Caused by personnel error.Maint personnel counseled. (2 page(s), 1/27/1987)
• ML20209A761 - LER 86-092-00:on 861230,reactor shutdown conducted to comply w/Tech Spec 3.4.4,due to high reactor coolant conductivity. Caused by failure of three main condenser tubes.Leakage & damaged tubes plugged & loose lagging removed. (3 page(s), 1/27/1987)
• ML20209A897 - LER 86-093-00:on 861229,plant placed into Operational Condition 1 when containment vacuum breaker opened.Caused by personnel error.Individuals counseled re responsibility to initiate limiting condition for operation. (3 page(s), 1/27/1987)
• ML20209A921 - LER 86-094-00:on 870101,discovered reactor mode switch not fully locked into shutdown position.Caused by bent mode switch key.Bent mode switch key discarded & temporarily replaced w/new duplicate key. (3 page(s), 1/27/1987)