ML19261F269
| ML19261F269 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 05/30/1974 |
| From: | Arnold R METROPOLITAN EDISON CO. |
| To: | |
| References | |
| NUDOCS 7910250710 | |
| Download: ML19261F269 (4) | |
Text
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AEC L T
UTION FC1 PART 50 DOCKET W.
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(TEMPORARY FCD )
CONTROL NO:
4896
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FRCM:
DATE CF ECC DATE REC'D LTR 11D10 RPT OT:C R Metropolitan Edison Company Reading, Pa. 19603 5-30-74 6-3-74 X
R. C. Arnold TO:
ORIG CC OTHER SENT AEC PDR X D. L.
I signed SENT LOCAL PDRX CLASS UNCLASS PROP INFO INPUT NO CYS REC'D DOCKET NO:
XXX 1
50-289 DESCRIPTION:
ENC. OSURES :
Ler reporting abnormal occurrence A0-74-3 on 5-20-74, regarding inadequate administrative Control of Emergency Diesel Generator IB ACKNOWLEDGED Maintenance........
DO NOT REMOVE PLANT NAME: Three Mile Island Unit #1 FOR ACTION / INFO?l'_ATION 0-4-74 GC E'JTLER(L)
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Gentlemen:
Operating License DPR-50 Docket No. 50-289 In acecrdance with Technical Specificaticus for the Wee Mile Island Nuclear Staticn Unit 1, we are reporting the follevin6 abnor=al cccurrence:
(1)
Report Number: AC-Th-3 (2a) Report Date: May 30, 197h (2b) Occurrence Date: May 20, 19Th (3)
Facility: Three Mile Island Nuclear Generating Station, Unit 1 (h)
Identification of Occurrence:
Title:
Inadequate Administrative Centrc] of E=ergency Diesel Generater 13 Maintenance Type:
Violatien of Technical Specificaticns, paragraph 6.2 3, which constitutes an abncr=al occurrence as defined by the Technical Specificaticus, paragraph 1.8g, in that the inadequate Administrative Centrol of E=ergency Diesel Generator 13 Maintenance =ay have threatened to cause an unsafe condition in the cperaticn of the plant.
(5)
Conditions Prior to Occurrence: Ect shutdevn, with major plant parameters as follows:
Fover:
Cere: C Elec: 0 RC Flev:
10h x 1C #/hr. (3 R.C. Pu=ps)
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RC Fressure: 2150 RC Temp.:
525 489d
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Directorate of Licensing May 30, 197h PEZR Level:
120" PRZR Temp.:
6h6 F (6)
Description of Occurrence: At 1900 cn May 19, 197h, during ner=al surveillance testing of the 13 Energency Dicsel Generator, it was discovered that the diesel engine would start as required but would not continue to run because of a 1cv lube oil pressure signal.
The diesel engine tripped en low lube oil pressure because three diesel engine lube oil pressure switches were disconnected frc=
their sensing lines. Investigation by the Plant Operations Review Cc==ittee (PCRC) revealed that the pressure switches had been mistakenly left disecnnected by =aintenance persennel on May 18, 197h, and that the maintenance Laing perfer=ed en the diesel engine at that time was not being dcne in accordance with an approved =aintenance procedure as required by the Technical Speci-ficaticcs and Station Ad=inistrative Precedures.
(7)
Designation of Apparent Cause of Occurrence: Persennel (8)
Analysis of Occurrence: The Energency Diesel Generatcr 13 was incapable of perfor=ing its design function for a period of approxi-
=ately h8 hcurs. This did not result in a threat to public health or safety because under the plant ecnditions that existed at the ti=e of thu occurrence, the diesels were not required to be operable in accordance with Section 3 7 of Technical Specifications. Further-
=cre, had a condition existed that required the diesel generators to be operable, Technical Specificatiens per=1t one diesel generater to be inoperable for seven days.
(9)
Corrective Action: The Plant Operations Review Cc==ittee (PCRC)
=et prc=ptly after the incident and reccc= ended to the Plant Superintendent a.
a precedure to repair, test, and restere to service the Ener-gency Diesel Generater 13, and b.
that maintenance persennel involved in the incident be briefed en the i=portance of using approved procedures.
The Plant Superintendent concurred with PORC's recc==endations; the approved maintenance procedure was used to repair, test, 2nd restere to service Energency Diesel Generator 13; and =aintenance perscnnel were briefed on the i=pertance of using approved proce-dures.
In addition to the above acticas, the Statien Superintendent has instructed Statica F%nage=ent and Superviscry perscnnel to emphasize to these reporting to the= the i=pertance of perfer=ing vork in accordance with approved procedures.
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. Directorate of Licensing May 30, 197L (10) Failure Data: Not Applicable.
Sincerely, ROBER'2 C. AP5CLD Vice President-Generatien RCA:DNG:sh cc: Directorate of Regulatory Operations, Region 1 U. S. Atemic Energy Cen=ission 631 Park Avenue Kirc of Prussia, Pennsylvania 19h06
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