05000315/LER-1979-022, Updated LER 79-022/03X-1 on 790323:to Prevent Recurrence of Nearly Simultaneous Bus Failures,Battery Equalizing Charge Has Been Reduced from 280 to 275 Volts.Addl Design Change Requested to Provide Overvoltage Alarm to Alert Op

Updated LER 79-022/03X-1 on 790323:to Prevent Recurrence of Nearly Simultaneous Bus Failures,Battery Equalizing Charge Has Been Reduced from 280 to 275 Volts.Addl Design Change Requested to Provide Overvoltage Alarm to Alert Operators

ML17317B473
Person / Time
Site:	Cook
Issue date:	08/15/1979
From:	Beilman T INDIANA MICHIGAN POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML17317B468	List: 05000315/LER-1978-065, Updated LER 78-065/03X-1 on 781229:previous Rept of Inoperable Pressurizer Level Channel Is No Longer Considered RO Due to Recent Tech Spec Change Deleting All Pressurizer Low Level Operability Requirements 05000315/LER-1979-022, Updated LER 79-022/03X-1 on 790323:to Prevent Recurrence of Nearly Simultaneous Bus Failures,Battery Equalizing Charge Has Been Reduced from 280 to 275 Volts.Addl Design Change Requested to Provide Overvoltage Alarm to Alert Op 05000315/LER-1979-030, Updated LER 79-030/03X-1 on 790417:design Change Coupled W/Relay Degradation Caused Relay to React Slower During Sequence.Design Change RFC-DC-12-2384 Installed as Preventive Measure 05000315/LER-1979-038, Updated LER 79-038/03L-0 on 790717:engineering Review in Progress to Determine Cause of Recurring Problem of Indicated Position of Control Rods N-13 & H-6 Exceeding Tech Specs 05000315/LER-1979-039, Updated LER 79-039/03L-0 on 790720:control Sys Repaired to Deliver Larger Quantity of Acid to Rcs.No Further Action Planned ML17317B467
References
LER-79-022-03X, LER-79-22-3X, NUDOCS 7908210534
Download: ML17317B473 (2)

LER-1979-022, Updated LER 79-022/03X-1 on 790323:to Prevent Recurrence of Nearly Simultaneous Bus Failures,Battery Equalizing Charge Has Been Reduced from 280 to 275 Volts.Addl Design Change Requested to Provide Overvoltage Alarm to Alert Operators

Event date:
Report date:
3151979022R00 - NRC Website

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