ML19210A786

Forwards Monthly Operating Rept for Dec 1977

ML19210A786
Person / Time
Site:	Three Mile Island
Issue date:	01/10/1978
From:	Herbein J METROPOLITAN EDISON CO.
To:	Mcdonald W NRC OFFICE OF MANAGEMENT AND PROGRAM ANALYSIS (MPA)
Shared Package
ML19210A787	List: ML19210A786 ML19210A800
References
GQL-0027, GQL-27, NUDOCS 7910310676
Download: ML19210A786 (2)

Text

U.S. NUCLE AR REGULATORY ( W l' N CCCXET NUM8ER NRC FO'M 195-t2 7al . ,

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.' O* Metropolitan Edison Company 1/10/78 I Mr. W. G. Mcdonald Reading, Pa. cATE RECElvEO J. G. Herbein 1/17/78 CNOTORIZED PRCP thPUTFORM NUMOE R CF CCPIES RECEIVE C l M TTER DRIGiN AL McLA33 pego C CCPV g $lhd CESCRIPTION ENCLCSU RE LTR TRANS 'UE FULIL%TI;: FWDlY :c.:ucr FCR December 1977 FIANT & CmFCEE27f OPEFABIIITl & AVAU.ASILITI.

'IHIS REFCKr TO EE Ti. IN FREFARING GRAY BOCK BY FIANS & CFERATICNS.

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POST OFFICE BOX 542 READING, PENNSYLVANI A 19603 TELEPHONE 215 - 929-2601 January 10, 1978 GQ,L 0027 -

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,1 Director of Nuclear Reactor Regulation !a yk

• Attn: 4r. W. G. Mcdonald, Director 4 9 f7h/$g Office of Management Information & Progran Centrol \

U. S. Nuclear Regulatory Cc==ission '

Washington, D.C. 20555 7 b N

Dear Sir:

Operating License No. DPR-50 Docket No. 50-289 Enclosed please find the December Cperating Status Report for Three !!ile Island Nuclear Station Unit 1.

C#7cerely, J. G. Herbein Vice President-Generation JGH:DG'4: t as Enclosure cc: Mr. J. P. O'Reilly, Directer Office of Inspection & Enforcement, Regicn 1 U.S. Nuclear Regulatory Cc= mission 631 Parl Avenue King of Prussia, PA 19h06 15u9 0 6

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MAINTENANCE STIMMARY CH-PIA and 1B vere inspected on December 5 and 6 respectively for possible shaft defects.

The following verk/ inspection was performed on each pump r

1. IRD readings were taken

2. Pump to motor coupling removed

3. Ultrasonic test of pu=p shaft

4. Analysis of UT results

5. Coupling of pump to motor

6. Testing of pu=p and declaring pump operable

7. Return pump to service Each pump was taken out of service separately to perform the above work. Results of UT tai IRD readings vere satisfactory for both pumps. All work performed on each puup was ec=pleted within the time limits set forth in the Tech. Specs.

\rsu "j QL7

OPERATING SITNARY The Unit operated at essentially 100% power for the entire month of December with the exception of the following two events.

On 12/3/77, a normal reactor shutdown was started because of a violatien of containrsat integrity at the Persennel Access Docr. Because of fai? ure of the decr actuating can roller, the inside decr equalizing valve did not fully close, causing the containment integrity violation. The door was repaired; containment integrity re-established, and full pcwer operation restored after relucing to about 86% full power. Total elapsed time at a reduced power level was about one hour.

On 12/11/77, the Unit was reduced to about 50% to conduct the monthly turbine stop valve testing. The Unit returned to full pcver within 3.3 hours3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br />.

The 1078 refueling outage originally scheduled for March 18, 1978, has been rescheduled for March h,1978.

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