ML19325F222

Revised Monthly Operating Rept for Sept 1989 for Cooper Nuclear Station,Consisting of Corrected Unit Shutdowns & Power Reductions Page

ML19325F222
Person / Time
Site:	Cooper
Issue date:	09/30/1989
From:	Wietharn K NEBRASKA PUBLIC POWER DISTRICT
To:
Shared Package
ML19325F203	List: ML19325F202 ML19325F220 ML19325F222
References
NUDOCS 8911170067
Download: ML19325F222 (1)

Text

UNIT SHUTDOWNS AND POWER REDUCTIONS DOCKET N0. 050-0298 UNIT NAME Cooper Nuclear Station CORRECTED REPORT FOR DATE November 9, 1989 COMPLETED BY K. J. Wietharn REPORT MONTH September 1989 TELEPHONE (402) 825-3811 Nthod of Licensee 4 5 use & G rrective

1. 1. EI " "EEI"E 3 vent ysta C aporent Action to 1 2 Code No. Date Tyne (Hours) Reason Down Reactor Report 4 Code Prevent Recurrence 8"J-08 890917 S 0 B 5 N/A N/A N/A Load reduction to repair a steam leak, perform MSIV closure testing and turbine testing, and backwash debris from the condenser. A control rod sequence exchange was performed.

82-09 890928 F 55.7 H 3 89-025 TC 1.S Reactor scram occurred due to a spurious actuation of the Turbine-Cenerator Digital Electro-hydraulic fluid reservoir low level trip circuit. A detailed investigstion was undertaken to determine the root cause as a mechanical agitation due to abnormal unloader valve actuation.

CD Os 0 i> NQ 000

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O 1 F: Forced 2 Reason: 3 Nthod: 4 Exhibit C - Instructiona for

. St Scheduled A - Equipment Failure (Explain) 1 - Manual Preparation of Data Entry SM B - Maintenance or Test 2 - Manual Scram Sheets for Licensee Event C - Refueling 3 - Automatic Scram Report (LER) File (NUREC-o161) M[p D - Regulatory Restriction 4 - Continued b4 5 Exhibit 1 - Same Source e E - Operator Training & License Examination 5 - Reduced load

• _' [ F - Administrative 6 - Other g C - Operational Error (Explain) my

.. .' (D Q.E 5 - *~ H - other (Explain) a