ML20207N270

Monthly Operating Rept for Sept 1988 for Trojan Nuclear Plant

ML20207N270
Person / Time
Site:	Trojan File:Portland General Electric icon.png
Issue date:	09/30/1988
From:	Olmstead C, Ulmer F PORTLAND GENERAL ELECTRIC CO.
To:	NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM)
References
CAO-331-88, NUDOCS 8810190060
Download: ML20207N270 (6)

Text

._____

, Portnd Gin:rd Electric

. Nuclear Division TROJAN NUCLEAR PLANT

SUMMARY

OF OPERATING EXPERIENCE September 1988 OPERATIONS The plant entered the month in Mode 1 at 100% power. Power was reduced to 96% for six hours on September 2 to maintain condenser back pressure within limits and returned to 100%. Power was reduced to 90% for approximately 45 minutes on September 8 to permit turbine testing.

On September 13, pressurizer pressure transmitter PT-458 failed its channel check making it inoperable and causing its bistables to be tripped. On September 16 at 0830 the reactor tripped on over temperature delta temperature (OTDT). The bistable feeding OTDT for pressure transmitter PT-458 was tripped due to the PT-458 failure. While preparing to replace this transmitter, an.

I&C Technician tripped the corresponding bistable for PT-455, completing the two-out-of-four logic for OTDT Reactor Trip. The work instruction that the Technician was following contained an error that directed him to the wrong protection rack, and he then checked and tripped the wrong bistable switch.

The plant remained in a shutdown status until September 22.

Numerous plant problems required resolution prior to startup including:

a) Service water check valve (SW-2025) failure, b) 'B' SI to RCS check valve leak, c) Pressurizer pressure and level transmitter problems.

d) North main feed pump bearing / turning gear problem.

e) Verification of valve positions required by locked valve list.

f) Clams obstructing coolers and piping supplied by service water systems.

Plant startup was begun on September 22 but terminated as a result of excessive turbine vibration at approximately 60% power. The turbinn was taken off line and the reactor shutdown for troubleshooting and analysis of the vibration. The reactor was restarted on September 23. Following resolution of problems with a turbine control switch, the turbine generator was synchronized to the grid at 0500 on September 24. One hundred percent power was attained at 1757 on September 24. At 1838 a cube leak war detected on the 'A' train of the condenser. Power was reduced to 55% to take the 'A' train of circulating water out of service. One leaking tube was plugged along with eighteen others as a preventative measure. The plant we.s returned to 100% power at 1410, and remained at that level (nrough the end of the month.

8910190060 880930 PDH ADOCK 05000344 R PDC

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[I Trojan Excellence-Our Way of Doing Business i

Porti nd G:neral Electric o .

Nucl:ar Division Trojan Monthly Operating Report September 1988 Maintenance

-Replaced failed pressurizer pressure transmitters PT-456, PT-457 and PT-458.

-Plugged 19 Condenser tubes.

-Completed 'A' train equipment outage for safety related equipment maintenance.

LICENSE AMENDMENTS None Trojan Excellence-Our Way of Doing Business

OPERATING DATA REPORT DOCKET NO.

50-344 D AT E _10 8 8 COMPLETED BY _F. J. Ulmer TELEPHONE 503-556-3713 Ext. 495 OPERATING STATUS Trojan Nuclear Plant Notes ,

1. Unit Name:

. 2. Reporting Period: Sectombnr 19R9 3411

3. Licensed Thermal Power (MWt): - 1216

4. Nameplate Rating (Gross MWe):

5. Design Electric I o sting (Net MWe):

1130 1I57

6. Maximum Dependable Capacity (Gross MWe):

7. Maximum Dependable Capacity (Net MWe):

1095 8s if Changes occur in Capacity Ratings (itema Number 3 Through 7) Since Last Report. Give Reasons: '

1095 MWn in still' Rnvinw nf summer nownr connrntinn indienton t h a t' valid for MDC.

9. Power Level To Which Restricted. lf Any (Net MWe):

n/a

10. Reasons For Restrictions.lf Any:

n/a .

t This Weeth YretoDate Cusselsuve 720 6575 105911

11. Hours in Reporting Period 65501.5 546.4 4147.4

12. Number Of Hours Reector Was Critical 0 3887 0

13. Reactor Reserve Shutdown Hours 4OR9 1 64760 B 534 5

14. Hours Generator On Line 0 0 3244

. 15. Unit Reserve Shutdown Hours 17749746 205600582

16. Gross Therma! Energy Genersted (MWH) 1775378 593705 , 4629358 67494996

17. Gross Electrical Energy Generated (MWH) 561358 4401499 63930806

18. Not Electrical Energy Generated (MWH) 61.2 74.2 62.2_

19. Unit Service Facto, 62.2 64.2

20. Unit Availability Facto, 74.2 _

71.2 61.1: 56.5

21. Unit Capacity Factor (Using MDC Net) 59.3 53.4_

69.0

• 22. Unit Capacity Factor (Using DER Net) 7.25 13.6 25.7 l

23. Unit Forced Outage Rate I

24. Shutdowns Scheduled Over Next 6 Months (Type. Dete.and Duration of Each):

Refueling, April 1989 f

D/^ l

25. If Shut Down At End of Report Period. Estimated Date of Startup:

l Fernset Achieved l

26. Units in Test Status (Prior to Comrnerciel operation):

l l

n/a n/a

! INITIAL CRITICALITY U/^ "/^

INITI AL ELECTRICITY n/n n /a COMMERCIAL OPER ATION (o/77)

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AVERAGE DAILY L31T POWER LEVEL DOCKET NO: 50-344 L71T: Trojan DATE: oc t ober 1988 COMPLETED BY:_F. J. Ulmer TELEPHONE: sol 596-T711 ext 495 MONTH ' September 1988 DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL (We Net) (We-Ne t) 1 1082 17 . -36.5 2 1068 18 -35 3 3090 19 -37 4 1094 20 -37 5 1098 21 -37 ,

6 1097 22 33 y 1097 23 -39 8 1094 24 482 9 1091 25 829 10 1097 26 1101 11 1098 27 1107 12 1101 28 1108 13 1101 29 1102 14 1105 30 1099 15 '102 31 16 391 INSTRUCTIONS On this format, list the average daily unit power level in We-Net for each day in the reporting month. Compute to the nearest whole megawatt.

(9/77)

B DOCKET NO. 50-344 - ,

UNIT SifUIDOWNS AND FOWER REDUCTIONS UNIT NAME 'P rni a n r

DATE October 1988 N I.F. m n E. J. m-REPORT MONTil 9 /88 TELEFIlONE 503-556-3713 ext 495

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<=

- ,, 5n= Ucensee Ev, EL Cause & Consective

-. 5'E E uy M Action to

%'- DJ8

• s- '~? E .E2 5 n:5 'd Event E0 d5 5 jtig Repos 8r yU Peevent Recurrence 6

LER 88-28 1A INSTRU Personnel (I&C) and procedure 880916 F 153.2 G 3 error when incorrect pressurizer pressure channel bistable was tripped prior to pressurizer .

pressure transmitter work.

F 26.7 A 1 High vibration on main turbine 880922 generater bearing prompted manual shutdown of turbine. Reactor also shutdown when control rod fell into core during shutdown.

1 Main turbine generator problem 880923 F 5.6 A with EHC load decrease push-button cause turbine to run down. Reactor rerr.ained critical.

0 A 4 Condenser tube leak caused 880924 F power reduction from 100% to 55%. Returned to 100% at 1418 on 9-25-88.

I 3 4 ,

I 2 Method: Exhible G.Instructfuns f: Toeced Reason:

I-Manual for Pres 4:ation of Data S: Scheduted A-Equipment Faltare(Explain) Entry Sheet. for IJeemee B4faintenance of Test 2-Manaal Scram.

J Automatic Se.am. Event Repswa tt.ER1 File (NUREG-C-Refueling 0161)

D-Reguistory Ress:Iction 4-Other (Emplain)

E. Operator "irmining & Ucense Esseninarlon 5

F Adnunistratise Exhibit I .S:. Source G-Operational Ensi g (Emptata) r8/77) 11 Ottics 1 E splain)

r 1 h p wun CE Portland General Electric Company Trojan Nuclear Plant 71760 Columbia River liwy Raimer. Oregon 97048 October 10, 1988 (503) 556-3713 CAO-331-88 US Nuclear Regulatory Commission Document Control Desk Washington, DC 20555 Gentlemen Monthly Operating Report In accordance with the Trojan Nuclear Plant Technical Specifications reporting requirements, the Monthly Operating Data Report is submitted for September, 1988.

Sincerely, b h<

C. A. Olmstoad General Manager Attachment c: Mr. John B. Martin Regional Administrator, Region V US Nuclear Regulatory Commission Mr. Bill Dixon Department of Energy State of Oregon Resident Inspector MOR Distribution

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