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{{Adams
#REDIRECT [[05000369/LER-1981-075, Forwards LER 81-075/03L-0.Detailed Event Analysis Encl]]
| number = ML20009G208
| issue date = 05/29/1981
| title = Forwards LER 81-075/03L-0.Detailed Event Analysis Encl
| author name = Parker W
| author affiliation = DUKE POWER CO.
| addressee name = Oreilly J
| addressee affiliation = NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
| docket = 05000369
| license number =
| contact person =
| document report number = NUDOCS 8108030429
| package number = ML20009G209
| document type = CORRESPONDENCE-LETTERS, INCOMING CORRESPONDENCE, UTILITY TO NRC
| page count = 2
}}
 
=Text=
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: m.                                                                                    OFFICIAL COPY DUKE POWER COMPNRW              o r p"q'2    ,                        sCj Powra Butt.ntwo$7'-
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422 Souta Launcu SrazzT, CnAnt. orts, N. C. 2824a 31 JUN I                    A8
* 40 WILLI AM O. PA R K E R, ,J R.
Vocr PmEsscE*.*                                                                                                                                                                                TELE *MONE: AREA 704 svEu. Paooveno-                                May 29, 1981                                                                                                                                                                        37s-4o83 Mr. James P. O'Reilly, Director U. S. Nuclear Regulatory Commission Region II                                                                ?
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s ge i L LJ                                                                          Y f 101 Marietta Street, Suite 3100                                        9y                                                        U'gg y.D Atlanta, Georgia 30303                                                                  jul Ps                                                                                      ,                                  Q Re: McGuire Nuclear Station Unit 1                                      b':\ u.5.d' ds Docket No. 50-369                                                                                                                                                                                    /
Y,4                                                      ._                                        \
 
==Dear Mr. O'Reilly:==
Please find attached Reportable Occurrence Report R0-369/81-75. This report                                                                                                                                                                          ._
concerns the Control Room Outside Air Filter Makeup Fan 1A being declared in-operable. This incident was considered to be of.no significance with respect to the health and safety of the public.                                                                      -                                                                                                                                -
Very truly yours, William O. Parker, Jr.
RWO:pw Attachment                                                                                                                                                                                                                                          :
cc:      Director                                                      Mr. Bill Lavallee Office of Management & Program Analysis                      Nuclear Safety Analysis Center U.S. Nuclear Regulatory Commission                            P. O. Box 10412 Washington, D. C.            20555                          Palo Alto, CA 94303 M2      M. J. Graham Resident Inspector - NRC McGuire Nuclear Station SrIf  i e108030429 810529 PDR ADOCK 05000369 S                              PDR                                                                                                                                                                                                                        A
 
                                                                                                  =
          .4 McGUIRE NUCLEAR STATION INCIDENT REPORT Report Number:    81-75 Report Date: May 31, 1981 Occurrence Date:    May 1, 1981 Facility: McGuire Unit 1, Cornelius, N. C.
Identification of Occurrence:    The Control Room Outside Air Filter Makeup Fan 1A was declared inoperable.
Condition Prior to Occurrence: Mode 5 Description of Occurrence: On May 1, 1981-at 0125 hours the Control Room Out-side Air Filter Makeup Fan 1A was declared inoperable. Broken motor mounts were discovered in the course of routine surveillance. This incident was reportable    -
pursuant to Technical Specification 3.7.6. A work    request was written, the        _
motor mounts were repaired and the fans were returned to service on May 7, 1981 at 1509 hours.
Appyrent Cause of Occurrence:    The fan motor mounts failed'due to metal fatigue.
Thi. is believed to be ar isolated occurrence, since no other similar failures have been reported.
Analysis of Occurrence:    There are two,100% capacity fans which provide outside air for the Control Room. TrainBreyainedoperableduringtheentiretimethat r
the Train A was out of service.
                                                            ~
:r Corrective Action: A work request was written to repair the motor mounts.      The    .-'
system was returned to an oparable status at 1509 hours on May 7, 1981.
Safety Analysis: The health and safety of the public were not affected by this incident. The redundant Train B air fan was operable while Train A was out of service.
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