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Forwards LERs 86-053-00,86-054-00,86-055-00,86-056-00, 86-057-00 & 86-039-01.LER 86-039-01 provides addl info re corrective actions.
Accession Number: ML20203N592
Date Released: Tuesday, August 4, 2020
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- ML20203N590 - Forwards LERs 86-053-00,86-054-00,86-055-00,86-056-00, 86-057-00 & 86-039-01.LER 86-039-01 provides addl info re corrective actions. (1 page(s), 10/1/1986)
- ML20203N597 - LER 86-053-00:on 860901,containment & drywell vacuum breakers discovered open.Caused by procedural error. Integrated operating instruction for cold startup revised. Control room operators counseled. (3 page(s), 10/1/1986)
- ML20203N607 - LER 86-054-00:on 860902,07,11,13,15 & 19,RCIC isolations occurred.Caused by instrument isolation valve failure & impulse line slope problems,leak detection response time & personnel error.Valves repaired or replaced. (5 page(s), 10/1/1986)
- ML20203N614 - LER 86-055-00:on 860902,reactor scram occurred.Caused by sudden increase in sensed pressure for steam bypass valves controller.Pressure regulators & instrumentation valve lineups recalibr,procedures revised & mgt directive issued. (4 page(s), 10/1/1986)
- ML20203N621 - LER 86-056-00:on 860902 & 29,RWCU containment isolations occurred.Caused by flow control valve problems,placement of blowdown flow element & insufficient operating instructions. Design changes initiated.Instructions will be revised. (4 page(s), 10/1/1986)
- ML20203N625 - LER 86-057-00:on 860903,containment isolation valves not deactivated in closed position.Caused by failure of nonconformance rept program to require routing of environ qualification deficiencies to control room.Program revised. (3 page(s), 10/1/1986)
- ML20203N649 - LER 86-039-01:on 860724 & 28,RCWU isolations occurred.Caused by flow control valve problems & placement of blowdown flow element.Design changes to replace valves,electronically dampen flow instruments & relocate flow element initiated. (4 page(s), 10/1/1986)
