ML19210A776

Forwards Monthly Operating Rept for May 1978

ML19210A776
Person / Time
Site:	Crane
Issue date:	06/14/1978
From:	Herbein J METROPOLITAN EDISON CO.
To:	Volgenau E NRC OFFICE OF INSPECTION & ENFORCEMENT (IE)
Shared Package
ML19210A777	List: ML19210A776
References
GQL-1064, NUDOCS 7910310671
Download: ML19210A776 (2)

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REOULATOffi INFORMATION DIETRIEUTICN ?YSTEP' (RIDS.1 OI9TRIE!.lTION FOR INCOMING M.STERIAL 50-29a EEC:

C LGENAU E nRG-HEREEIN

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METRPPOL EDISON DATE FCVD: O UIC.'~5 COPIE? FEC EI'/ED E OCTY F E : LETTER NOTARIZED: NO 3 TF 1 ENCL 1 SUFJECT-FORWARDINO SUBJECT FACILITY"5 NONTHLY OPEPATING REPT FOR THE MONTH OF MAi

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ANNUAL L SEMI-ANNUAL OFERATING REPORTS (OL STAGE).

(DISTRIOUTION CCDE A000)

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CHECK 4*W/ ENCL EFFLUENT TREAT SYS**W/ ENCL EXTEFNAL:

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METROPOLITAN EDISON COMPANY sw:ciany er ae=: east aucticuritiries conecaar.av l POST OFFICE BOX 542 READING, PENNSYLVANt A 19603 TELEPHONE 215 - 929-3601 June lh, 1978 GQL 106h Mr. Ernst Volgenau, Director Office of Inspection and Enforce =ent U. S. Nuclear Regulatory Coc=ission Washington, D. C.

20555

Dear Sir:

Three Mile Island Nuclear Station Unit 1 (TMI-1)

Cperating License No. DPR-50 Docket No. 50-289 Enclosed please find two (2) copies of the May Operating Report for Three Mile Island Nuclear Statien, Unit 1.

Sincerely, J. G. Herbein Vice President-Generation JGH:DGM:ejg

Enclosure:

cc:

Mr. 3. H. Grier, Director Office of Inspection and Enforce =ent U.S. Nuclear Regulatory Cer:=issicn 631 Park Avenue King of Prussia, Pennsylvania 19h06 Director {2 copies)

Office of Manage =ent Infor=ation and Pregram Centrol c/o Distribution Services 3 ranch DPC, ADM U. S. Nuclear Regulatory Cc==ission Washington, D. C.

20555 7317201 (f

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UNIT SHUTDOWNS AND POWER REDUCTIONS Docket No.

50-289 Unn Name M1 REPORT MONTH MAY Date 6-2-T8 Completed By D. G. Mitchell Telephone 929-3601 Ext. If' W

l $7 System Component Cause and Corrective No.

Date Type cu Uh

$ esm oS Code I4 Code 5 Action to N :r:

E odo E

• 5.

Prevent Recurrence Q

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.O U U S$$

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,t.5 8 as o

mm 4

5-1-78 3

31 C

1 Closed Generator breakers at 0702 on 5-2-78k*

5 5-2-78 3

1.6 H

Turbine Testing 6

5-20-78 S

0 H

Physics testing for power imbalance detector correlation test f

2 eason:

3

" Exhibit G - Instructions IF: Forced R

f4ethod:

r r Preparation of Data S: Scheduled A-Equipment Failure (Explain) 1-Manual L

D-Maintenance or Test 2-Manual Scram.

C-Re Neling Event Report (LER) File o

3-Automatic Scram.

~

D-Regulatory Restriction b-Other (Explain)

E-Operator Training & Licensee Examination g

F-Administrative p.)

5 va G-Operational Error (Explain)

Exhibit 1 - Same Source H-Other (Explain)

9 AVERAGE DAILY UNIT POWER LEVEL locket No, co-280 Unit S!I-1 Date June 2. lo78 Completed By D. G. Mitchell Telephone 929-3601 Ext. 169 MONTH MAY DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL (MWe-Net)

(MWe-Net) 1

-41 17 707 2

109 18 703 3

273 19 702 h

260 20 523 5

571 21 693 577 22 753 6

682 7

23 782 8

708 2h 767 703 9

25 771 699 26 769 10 704 27 771 11 700 28 771 12 13 29 770 700 1h 701 30 768 15 31 765 705 707 16 1589 0^d

TMI-1 OPERATING

SUMMARY

FMY 1978 Unit Performance The Unit was sychronized and breakers were closed at 0702 hours0.00813 days <br />0.195 hours <br />0.00116 weeks <br />2.67111e-4 months <br /> on May 2, 1978 following the 46 Day 1978 Refueling Outage.

The Unit was taken to 25% for 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> to equalize temperatures on the Turbine Rotor.

The Unit was then taken off line, Overspeed testing conducted successfully, and put back on line for power escalation at 1330 hours0.0154 days <br />0.369 hours <br />0.0022 weeks <br />5.06065e-4 months <br /> on 2 May 1978.

Physics testing was conducted with Xenon Equilibrium conditions at 40%,

75% and 90% power conditions through to 05/07/78. Following the physics testing program, the Unit was held at about 91% power because of a NRC 91% Licensing Restriction initially resulting from concerns over the new 34W Small Break Loss of Coolant Accident Analysis but subsequently restricted by the unexp'ected power peaking testing results collected during the power escalation physics testing program.

These two issues were re-solved with the NRC, and a 100% license issued late on 05/19/78.

The Unit remained at 90% however, until 05/20/78 when it reduced power to 50%

to conduct turbine valve testing and subsequent physics testing at 60%

and 70% power.

The Unit escalated to 100% power at 0312 hours0.00361 days <br />0.0867 hours <br />5.15873e-4 weeks <br />1.18716e-4 months <br /> on 05/21/78.

At 2130 hours0.0247 days <br />0.592 hours <br />0.00352 weeks <br />8.10465e-4 months <br /> on 05/21/78, t

. nit was forced to reduce to 95% due to the HD-PelC scal failure while HD-P-1A was out of service for pump shaft replacement.

The Unit returned to 100% on 05/22/78 at 1400 hours0.0162 days <br />0.389 hours <br />0.00231 weeks <br />5.327e-4 months <br />.

100% power operation continued until 05/24/78 1851 hours0.0214 days <br />0.514 hours <br />0.00306 weeks <br />7.043055e-4 months <br /> at which time the Unit experienced an automatic ICS runback to approximately 60% power due to a Main Feed Pump Trip. While isolating one half of the "A" feed pump condenser to investigate a tube leak, an auxiliary vacuum pump tripped on thermal overload and the feed pump subsequently tripped on loss of vacuum.

The Unit was returned to full power on 05/24/78 at 2335 hours0.027 days <br />0.649 hours <br />0.00386 weeks <br />8.884675e-4 months <br />.

On 05/31/78 at about 1040 hours0.012 days <br />0.289 hours <br />0.00172 weeks <br />3.9572e-4 months <br />, higher than normal bearing vibrations and temperature were momentarily experienced on the Generator Exciter bearings (approximately 7 mills vibration on Brg. No. 11 & 12, and approximately 200 F on Brg. No. 12).

The cause was surmised to be momentary restriction in the oil supply to Brg No. 12.

Load shedding of the Unit was initiated but was terminated at 96% power sicca the vibration and temneratura conditions stabilized and quickly returned to normal. After an unsuccessful investigation, to precisely identify the cause of the abnormal bearing vibration and tempera-tures, the Unit returned to 100% power operation within 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />.

Unit Shutdowns and Significant Power Reductions 1.

0001 Hrs. 05/01/78 to 1300 Hrs. 05/02/78 - 1978 Refueling Outage 2.

1300 Hrs. 05/02/78 to 0710 Hrs. 05/07/78 - Power Escalation Paysics Testing with hold points at 40%, 75% and 90% power.

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3.

0710 Hrs. 05/07/78 to 1800 Hrs. 05/19/78 - 91% NRC License Restriction Small Break LOCA, Flux peaking results from physics testing.

4.

1800 Hrs. 05/19/78 to 0315 Hrs. 05/20/78 - 50% Turbine Stop Valve Testing; Physics Testing hold points at 60 % and 70%.

5.

2130 Hrs. 05/21/78 to 1400 Hrs. 05/22/78 - 95% - HD-P-1C Seal Failure While HD-P-1A 005.

6.

1851 Hrs. 05/24/78 to 2335 Hrs. 05/24/78 - 60% - ICS Runback Due to FW-P-1A Trip.

7.

1040 Hrs. 05/31/78 to 1115 Hrs. 05/31/78 - 98% - Exciter Bearing Abnormal Vibration end Temperature.

MAINTENANCE

SUMMARY

There was no major safety related maintenance performed turing the month of May, 1978.

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PERATING DATA REPORT eket No. 50-289 Date June 2, 1978 Completed By D. G. Mit @ ell OPERATING STATUS Telephone 020 1601 Fe. 160 1.

Unit Name:

Three Mile Island. Unit 1 2.

Reporting Period: MAy, 1978 3

Licensed Thermal Power (MWt):

ee,e k.

Nameplate Rating (Gross PWe):

. E71 5

Design Electrical Rating (Net MWe):

819 6.

Max. Dependable Capacity (Gross MWe): 840 7

Msx. Dependable Capacity (Net MWe):

792 8.

If Changes Occur in Capacity Ratings (Items No. 3 through 7) Since Last Report, Give Reasons:

9 Pover Level to which Restricted. If Any (Net MWe):

10.

Reasons fer Restrictions, If Any:

This Menth Yr. -To-D ate Cumulative 74h 3623 32S32 11.

Hours in Reporting Period 25673.3 12.

No. of Hours Reactor was Critical Thh 2615 0

0 838.5 13.

Reactor Reserve Shutdown Hours 25132.9 lb.

Hours Generator On-Line 711.k 2535.h 0

0 0

15 Unit Reserve Shutdown Hours

16. Gross Thermal Energy Generated (MWH) 1559329 6,029,2hh 61,h22,779 17 Gross Elect. Energy Generated (MWH) 508903 2,000,880 20,49h,682 1,66o,616 19,185,215

18. Net Electrical Energy Generated (MWH) h7hche I*

19 Unit Service Factor 95.6 70.0 95 0 70.0 76.6 20.

Unit Avsilability Factor 21.

Unit Capacity Factor (Using MDC Net) 80.s 65.1 y,

a 22.

Unit Capacity Factor (Using DER Net) 77.o 62.9 71.2 0

0 5 1%

23 Unit Forced Outage Rate 2k.

Shutdowns Scheduled Over Next 6 Months (Type, Date, and Duratien of Each):

25 If Shut Down at End of Report Period, Estimated Date of Startup:

26. Units In Test Status (Prior to Co==ercial Operation):

FORECAST ACHIEVED INITIAL CRITICALITY INITIAL ELECTRICITY COMMERCIAL OPERATION i539 C^i7