ML20085M678
| ML20085M678 | |
| Person / Time | |
|---|---|
| Site: | Fort Saint Vrain  |
| Issue date: | 08/15/1975 |
| From: | Brey H, Eva Hill, Hillyard H PUBLIC SERVICE CO. OF COLORADO |
| To: | Howard E NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| Shared Package | |
| ML20085M657 | List: |
| References | |
| AO-50-267-75-17, NUDOCS 8311090170 | |
| Download: ML20085M678 (4) | |
Text
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P. O. Box 361, Platteville Colorado 80651
'7e August 15, 1975 Mr. E. Morris lioward, Director Nuclear Ecgulatory Concission Region IV Office of Inspection and Enforcement Suite 1000 Arlington, Texan 76012 l
Ref: Facility Operating License No. DPR-34 Docket No. 50-267
Dear Mr. !!cward:
Enclosed please find a copy of Abnorcal Occurrence Rooort No. 50-267/75/17, Preliminary, submitted per the requirements of the Technical Specifications.
Very truly yours, Frederic E. Swart Superintendent, Nuclear F 4
Fort St. Vrain Nuclear Generating Station FES/alk cc: Ifr. Angelo Giambusso 8311090170 750815 '~
PDR ADOCK 05000267 s
PDR 4
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REPORT DATE:
August 15, 1975 ABNORMAL OCCURRENCE 75/17 Page 1 of 3 OCCURRENCE DATE:
August 8, 1975 PORT ST. VRAIN NUCLEAR GENERATING STATION PUBLIC SERVICE COMPANY OF COLORADO P. O. BOX 361 PLATTEVILLE, COLORADO 80651 REPORT NO. 50-267/75/17 Preliminary I
IDENTIFICATION OF OCCURRENCE:
Instrument air compressor 1C (C-8203) was observed by a plant operator to be
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This was identified as an Ab-running continuously in an unloaded condition.
normal Occurrence per Technical Specifications 2.1 (f).
CONDITIONS PRIOR Routine Shutdown TO OCCURRENCE:
Steady State Power Routine Load Change Hot Shutdown Other (specify)
X Cold Shutdown Refueling Shutdown-Routine Startup The major plant parameters at the time of the event were as follows:
RTR 0
MWth Power ELECT 0
MWe s
Pressure N/A psig Secondary Coolant Temperature N/A
-F f
Flow N/A f/hr.
Pressure N/A psig Primary Coolant
'F Core Inlet Temperature _ -N/A N/A
'F Core Outlet Flow N/A f/hr.
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_-____,__l_.____
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ABNORMAL OCCURRENCE 75/17 Page 2 of 3 DESCRIPTION OF OCCURREUCC:
Instrument air compressor 1C (C-8203) was observed by a plant operator to be running continuously in an unloaded condition. The spare instrument air com-pressor was placed in service and C-8203 shutdown. The instrument air sys-tem was not disabled and no loss of control function occurred.
APPARENT CAUSE OF OCCURRENCE:
Design Unusual Service Cond.
Including Environment Manufacture X
Component Failure Installation /Const.
Other (specify)
Operator Procedure ANALYSIS OF OCCURRENCE:
A mechanical failure occurred in the suction valve unloader actuator assembly which prevented proper operation of the unloader.
CORRECTIVE ACTION:
The failed unloader actuator was replaced with a new, identical, unloader actua-tor and tested satisfactorily.
Public Service Company and the manufacturer are investigating possible replace-ment actuators.
FAILURE DATA /SIMILAR REPORTED OCCURRENCES:
None PROGRAMMATIC IMPACT:
None CODE IMPACT:
No'e n
r:-
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ABNORMAL OCCURRENCE 75/17 Page 3 of 3 Submitted By:
a liarvey W.gilyard, Jd Technical Services Supe sor Reviewed By:
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Eddi D/ilill "
Seni r Results Engineer Approved By:
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H. Larry Brgy
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Superintendent, Operations l
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