ML15118A427

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Forwards Info Re 10 Minute Criteria for Reactor Coolant Pump Seals
ML15118A427
Person / Time
Site: Oconee  
Issue date: 07/31/1995
From: Keller L
NRC
To: Tracey G
External (Affiliation Not Assigned)
Shared Package
ML15117A344 List:
References
NUDOCS 9606240056
Download: ML15118A427 (62)
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Text

FACSIMILE TRANSMITTAL USNRC RESIDENT OFFICE OCONEE NUCLEAR STATION DATE:

/

5 PRIORITY IMMEDIATELY 1 HOUR 2-4 HOURS TO!

L~

AC FROM: Lt (FAX NO. VERIFCATION (803) 882-6927)

SUBJECT:

//

j NO. OF PAGES

+ TRANSMITTAL SHEET FAX NO. 803-882-0189 FAX NO. REGION II, ATLANTA (404-331-5789 DRP)/(404-331-4449)

FAX NOS. WHITE FLINT -

(ONE & TWO)

(301)415-2260 LEN WIENS -

(301) 415-2102 96062400 5 6 960621 PDR ADOCK 05000269 TOd 68TOE208 WO UV2 :60 S66T-TZ-2,0

Page 3 Why is the "10 minute criteria" currently a limit for Unit I RC pump seals?

A. Technical There is limited volume of water contained between the RCS and the RC pump seals. The amount of time required to deplete this volume of water and introduce hot RCS fluid to the RC pump seals depends on the RC pump seal leakage rate present when normal RC pump seal injection flow and component cooling flow are lost.

Current RC pump seal leakage limits are based on establishing seal injection 10 minutes after the loss of HPI seal injection flow & component pooling flow.

B. Regulatory

1.

9/20/82 letter from HB Tucker (Duke) to HR Denton (NRC)

The originally accepted design concept for SSF operation was based on a 10 minute capability to transfer control to the SSF. Hot shorts or spurious actuation due to fire during the first 10 minutes are not part of the design basis.

This justification was based on the extreme unlikelihood of multiple spurious operations resulting in unacceptable coolant loss essentially coincident with a loss of multiple mitigating systems within a 10 minute period, Fires cannot instantly incapacitate all equipment in a large area and can only propagate in some real finite time within finite physical limits, Furthermore, upon confirmation of a fire in the plant, operating personnel will be dispatched to the SSF where they will establish communication with the Control Room. As long as capability exists to perform vital reactor control and monitoring from the control room, the operator will maintain control from that location. If vital control and monitoring functions (e. g. reactor coolant pressure boundary, reactor coolant makeup capability) become unacceptably degraded or unavailable from the control room, a prompt transfer can be made and control established from the SSF.

2.

9/12/84 letter from RC Lewis (NRC) to HB Tucker (Duke)

SSF can be manually activated and operated in ten minutes. The ten minute time frame was based on reactor coolant pump seal degradation from having no seal water supply.

3.

3/10/92 SER for Station Blackout from NRC to JW Hampton The SSF diesel generator will be available within 10 minutes from the recognition of an SBO event.

4.

3/24/95 NRC Staff Evaluation Report Regarding GI-23, "Reactor Coolant Pump Seal Failures" The staff reviewed the unique features of Oconee which included the criteria to reestablish cooling within 10 minutes of the loss of seal cooling mentioned in DG-1008 is also met, as reported on Page 10-10 of the Oconee WE report that "Operators are trained that seal cooling must be re-established within 10 minutes following a loss of seal cooling to preclude damage,"

and further confirmed in response to the staff question 5b(2).

E S8T0ee3 £08

Duke - NRC Meeting Keowee Reliability Analysis (Keowee PRA)

.12/13/95 By:

M. J. Barrett..

NGD - PRA Section

Yeowee PRA Outline

  • Motivation for Keowee PRA Study
  • Overview of Scope, Objectives, and Tasks
  • Description of Keowee
  • Description of Methodology
  • Results and Conclusions Keowee PRA Motivation
  • Importance of Keowee to provide emergency ac power to each of the three Oconee units.
  • A number of single failure vulnerabilities identified during the DBD process.
  • A number of relay failures and Keowee unit failures occurred in the 1990 to 1992 period.
  • Oconee Unit 2 LOOP - October 19,1992.
  • These problems combined with Duke's interest in improving Duke/regulator confidence in Keowee led Duke to undertake the Keowee PRA study.

Xeowee PRA Project Objectives

  • Develop an analytical reliability model of the Keowee Hydro Station.
  • Obtain an estimate of the reliability of Keowee as an emergency power source for Oconee.
  • Compare calculated reliability to the historical data.
  • Develop insights and recommendations to complement ongoing initiatives.

Keowee PRA Project Scope

  • Develop fault trees for systems important to the emergency operation of Keowee.
  • Include the important components at an appropriate level for collecting statistically significant data.
  • Integrate the Keowee model into the Oconee PRA ac power model.

teowee PRA Project Team

  • Project Leader
  • Electrical Engineers
  • Mechanical/Nuclear Engineers
  • ONS Operations Support
  • ONS Engineering Support
  • Ongoing interaction with NRC personnel and contractor Keowee PRA Project Tasks
  • Plant familiarization (drawing collection, PIP/LER studies & walkdowns)
  • Collect plant specific failure and operating data
  • Develop reliability data base
  • Develop fault tree models
  • Human reliability modeling
  • Solution and analysis of results
  • Reviews (team, consultants, NRC online, peers)

-7 0

Keowee PRA Keowee Function Emergency power source for Oconee Overhead supply through the Oconee switchyard and startup transformers.

Underground supply through a standby bus and associated transformer.

ACB -3 CT4 TG2 TG1 Spilway PCB -9 KOT ACB - 1 Keowee River Oconee 230Kv Switchyard yellow bus 1

PCB - 30 )

Startup Transformer HA u

CT3 Figure 3. 1-1 Keowee - Oconee AC Power Flowpath

Keowee Aux Power Swgr. IX Keowee ACB ACB Main 7

swaned 4 --- Transformeor DC Power wyd rrsom Voltage Regulator

-ransformer SB IE ACB-11 I r Air to Waler Heat Exchanger FF FS( 6 spaced )3.

ACB3 1e 8Auxe Power ReWd Exditation K

Transformners, I IU From OCONEE,*

X 4160V 1TC N

Guide we Path Air seanno

-00 To OCONEE Thrushrus Bewnging.

SUC0.

Pump TAn FilterCooleru Bea wing Re rn lin g OWL1 GBOlPmIupPm PumpT Tauracein Figue31-2iewer Subsyems Neeuded or OoneACPoe U O10

Keowee PRA Modeling Objectives

  • Identify and address all potential modes of Keowee operation.
  • Develop models for components/systems required for the emergency operation of the Keowee units.
  • Use plant experience to identify component-specific failure modes.
  • Use plant experience to quantify failure rates of systems, subsystems, and components.

' eowee PRA Modeling Scope

  • Both Keowee units and the needed support systems.
  • The underground path up to and including CT4.
  • The overhead path up to and including CT3.
  • Not intended to duplicate ONS IPE models.
  • Modeling detail guided by the availability of data.

High Level Logic Tree (K)

Governor &

Generator Keowee Air Circuit Excitation Power Path Turbine Tree Start Tree Breaker Tree Tree Tree (W)

(G)

(Y)

Tree (A)

(E)

(S)

Guide Auxiliary Bearing Oil Power Tree Tree (B)

(X)

Cooling EGTPS Tree Water Tree (L

(F)

Governor Oil Air Tree (0)

Turbine Swyd DC Sump Tree -

Power Tree (P)

(D)

Figure 4.3-2 Keowee Fault Tree Overview

.01

.0

Keowee PRA Keowee Model Attributes

  • Considers all of the applicable operating modes of the Keowee Units.
  • Considers the impact of human actions on Keowee reliability.
  • Allows more detailed analysis of specific failures by determining results for subsections of the complete model.

Keowee PRA General Analysis Description

  • Base case considers past interim operating restriction on grid generation.
  • Sensitivity study considers operation with two units available for grid generation:

includes the design change to protect against the zone overlap problem, includes the design change to protect against the overfrequency concern.

  • Other sensitivity studies (failure rates, human error rates, recoveries).

eowee PRA Sensitivity Studies

  • generic versus bayesian updated data
  • grid-cycled versus standby unit reliability
  • recovered versus unrecovered results
  • human error sensitivity studies

-latent human errors

-human error probabilities prior to the 10/92 loss of offsite power

  • infrequently tested/demanded components challenged during emergency starts
  • mg-6 relay failure rate
  • uncertainty analysis
  • one versus two units generating to the grid
  • sensitivity to fraction of time that 2 units generate to the grid Keowee PRA Results Of The Keowee Reliability Model
  • The probability of Keowee station failure is calculated to be 0.0074 for the base case.
  • Keowee unit reliability values:

Model/Op data

- Start failure probability 0.0081/0.0045

- Run failure probability 0.012/0.012

  • Overhead/Underground Supplies

- UG supply failure probability 0.027

- OH supply failure probability 0.070 Keowee PRA Results Of The Keowee Reliability Model (Contd.)

  • The Keowee station failure probability is dominated by the Keowee unavailability due to maintenance.
  • Components of the auxiliary ac power system and the voltage regulator are also important.
  • Keowee station failure probability is not affected by Keowee alignment for grid generation.
  • Model results compare well to the historical data.

Keowee PRA Oconee Transformers CT3 And CT4 Fail To Receive Power From Keowee - 7.4E-03

1) Both Keowee Units Unavailable Due 5.23E-03 To Common Maintenance
2) With Both Keowee Units Available 3.22E-04 Common Cause Failure Of ACBs 5, 6, 7, and 8 Failure To Recover From ACB Failures By Manual Operation
3) The Overhead Unit (2) Is Unavailable 2.66E-04 Due To Maintenance Air Circuit Breaker 7 Fails To Close Due To Mechanical Failure Oconee Transformers CT3 And CT4 Fal To Receive Power From Keowee 7.4E-03 1.0E-02 PowPr To CT4 Via The Power To CT3 Via The Underground Path Fonatrom OverheadPathFrom Keoweel'ails KeoweeFails 8.6E-03 6.6E-02 3.0E-02 7.3E-02 IF Oonee Emergency BothKeoweeUnits Keowee Failure Due To Oconee Emergency BothKeoweeUnits Keowee Failure Due To Power Via The Unavailable Due To Common Mode Failure Pow erVia The Overhead Unavailable Due To Common Mode Failure Underground Path Fails Common Maintenance PathlFails Common Maintenance 2.54E-3 8.4-04 6.E-02

.4E-0 22E-02 5.23E-03

.51 E-03 G.5E-02 S. 23E-03

.53 E-03 Both Keowee Units Fail To Underground Path Fails Keowee Unit 2 Fails To The Overhead Unit (2)s Overhead Path Fails To Supply The Underground To Connect Keowee To Supply The Overhead Unavailable Due To Connect Keowee To Path Oconee

.Power Path Maintenance Oconee At CT3

.E-02 1E-03 2.2E-02 3.80E-02 8.2E-03 Keowee Unit 1 Fails To The Underground Supply Supply The Underground Is Not Recovered By Using Power.Path KeoweeUnit2 20E-02 Simplified Fault Tree Visualization Of The Keowee Reliability Results

Unavp

~iqi Deo 0m Both Keowee Units (s Unavailable Due To Common Maintenance The Overhead Unit (2) Is Unavailable Due Tom Maintenance Air Circuit Breaker 7 Fails To Close Due To Mechanical Failure Failure To Recover Keowee Aux Power Breakers by Manual Control Common Cause Failure Of All Keowee Auxiliary Power Breakers 1D Common Cause Failure Of Both Unit s WL Filters Due To m

Intake Debris 6

Failure To Recover From a

MainTure WL Strainer Clogging 0

KHU-1 Voltage Adjust Failure Drives Generator Output Too High/Low 6

Keowee Unit 1 Generator D

Fault While the Unit Runs ni 0

Common Cause Failure Of Both Units Voltage Regulators F

S=

To Run 6

o o(A 0

0 0

0 0

KeowDe ratter cNo. IFails Keowee Unit I Base Adjust Fails To Establish Correct 0

~

Unit VoltageC 0

Breaker Fails To Close Due To Mehanical Failure 0

Keowee Unit I Field Flashing Breaker Fails To Open Due To Latent Human Error Keowee Unit I

Field Breaker Fails To Close Due To Latent Human Error 0

Latent Human Error Fails Keowee 1 Governor During Cold Start Keowee Unit 1 Field Flashing Breaker Fails To Close Due To Latent Human Error Keowee Unit I Supply Breaker Fails To Close Due To Latent Human Error Keowee Unit 1 Relay 41/AX Fails To Pick-up And Latch

o 0

0 0

KHU-1 Voltage Adjust Failure Drives Generator Output Too HighLow Range O

Keowee Standby Battery Charger SBC Not Lined Up int 1Hour a

C-,n Batte Charger KCItFails oo Keoeer UCNit 1LuineU inIHDrC Battery Charger KCI Fails m

coo Keowee Unit I Gov. Fails RJ to Position Wicket Gates TvWith Unit Running Keowee Unit I Turbine Fails With the Unit Running Pw Air Circuit Breaker 7 Fails To Close Due To4 Mechanical Failure C

The Overhead Unit (2) is Unavailable Due To c

Maintenance

~0 CCF of IX Aux Power C

0 BreakesAB5&7 m

(5 0

CD N

M Mean 7.32E-03

[ 5%

2.93E-03 50%

6.26E-03

- 95%

1.53E-02 tandard Deviaton 4.26E-03 Skewness 2.28E+00 Kurtosis 9.01E+00 Sample Size 5000 D

e n

S y

1.0E-02 Frequency Figure 7.5-1: Probability Distribution For Model Top Gate KEOWTOP

Keowee PRA Results Of The Keowee/Oconee ac Power Integrated Model

  • The probability of losing all ac power at Oconee is calculated to be 6.4E-05/year.
  • This result is mostly influenced by the occurrence of a severe weather event:

- assumed loss of the overhead path,

- assumed loss of the CT5 feed.

  • Other important events are the maintenance unavailabilities for the Keowee units and transformer CT4.

1Teowee PRA Oconee 4160V Main Feeder Bus Power Fails from all Paths - 6.35E-05

1) With Both Keowee Units Available 1.26E-05 Transformer CT4 Is In Maintenance Loss Of Off-Site Power Due To Severe Weather Initiating Event
2) Both Keowee Units Unavailable Due To 7.53E-06 Common Maintenance Loss Of Off-Site Power Due To Severe Weather Initiating Event Modifier For Keowee Maintenance Scheduled For Mild Weather Keowee PRA Oconee 4160V Main Feeder Bus Power Fails from all Paths (Contd.)
3) With Both Keowee Units Available 4.63E-06 Loss Of Off-Site Power Due To Severe Weather Initiating Event Common Cause Failure Of ACBs 5, 6, 7, and8 Failure To Recover From ACB Failures By Manual Operation teowee PRA Results Of The Keowee/Oconee ac Power Integrated Model (Contd.)
  • Core Melt Frequency due to loss of all ac power events is 1.OE-06/year low probability of loss of all ac power mitigation capability of the SSF Keowee PRA Core Damage Event Occurs as the Result ofLoss of Offsite Power - 1. 04E-06
1) With Both Keowee Units Available 2.77E-07 Transformer CT4 Is In Maintenance Loss Of Off-Site Power Due To Severe Weather Initiating Event Operators Fail To Align The SSF RCM System For Operation Offsite power not recovered Xeowee PRA Core Damage Event Occurs as the Result of Loss of Offsite Power(Contd.)
2) Both Keowee Units Unavailable Due To 1.66E-07 Common Maintenance Loss Of Off-Site Power Due To Severe Weather Initiating Event Modifier For Keowee Maintenance Scheduled For Mild Weather Operators Fail To Align The SSF RCM System For Operation Offsite power not recovered Keowee PRA Core Damage Event Occurs as the Result ofLoss of Offsite Power (Contd.)
3) With Both Keowee Units Available 9.69E-08 Transformer CT4 Is In Maintenance Loss Of Off-Site Power Due To Severe Weather Initiating Event SSF Diesel Generator Is In Maintenance Offsite power not recovered

-31

  • 0

eowee PRA Conclusions

  • Keowee is a very reliable source of emergency power for Oconee.
  • Simultaneous loss of both Keowee units, due to concurrent maintenance or common cause failure, is the principal cause of Keowee failure.
  • The high reliability of the underground path and the ability to align the overhead unit to the underground path make the probability of losing all ac power small.

Keowee PRA Recommendations

  • Procedure enhancements.
  • Some important maintenance activities should consider other maintenance activities in progress or the potential for severe weather.
  • Use the Maintenance Rule Program to perform systematic monitoring of the equipment and performance of the ac power system.

-33 lie.

From: CAL7344 --PROC Date and time 01/26/95 14:10 To: DL88344 --PROC Donna L. Brock TAL8382 --PRDC Terry Ledford 6KL/J1! -- VkOC Barry Loftis BEM7310 -- PROC Bill McAlister From:

Clay A. Little, ONS Electrical Engineering Phone 885-3115, Beeper 8-777-3943 Mail Code ON01IE

Subject:

Lee Data

-~

&pi-F, LLC?/

Forwarding note from PMA8371 --PROC 01/2695 07:40 To: CAL7344 --PROC JEB PRDC' cc: KSC8371 --PROC From: P. M. Abraham 4d1W 1

Subject:

Lee Data

.As part of the Oconee emergency power system reliability study, Mike Misenheime r, Mike Barrett and I visited the Lee Steam Station to gather available data pertaining to the CT start and run reliability and load run hours and also to walkdown the plant. We arrived at the plant yesterday, and Jim Davis from the plant helped us with the tour, briefing, and data gathering. Jim was very courteous, supportive of our effort and seemed very experienced and knowledgeab le. I appreciate Jim and the pinat management for making Jim available.

Lee is located on the banks of the Saluda river. It consists of 3 coal units and 3 CTs and is not used for btthjtduggathn. Since the coal units take about 11_hours be aced on line, only the CTs are considered for Oconee' s power needs. The CTscan be made avai-able in 12-25 minutes Tof6Trte's use.

We saw copies of the Oconee-Lee operating procedure and the Lee emergency procedure for making Lee available for Oconee in the control room.

The 3 CTs are located in 3 separate buildings. The units can be started either locally or from the control room, and Jim walked us through the startup sequenc

  • e and the step to separate the Oconee-Lee 100Kv line from the Central switch yard. Unit 4C uses a combination of the blacout diesel and auxiliary diesel to start the unit, while Units 5C and 6C utilize the electric motors for the startup. We learned that 5C ran contineously for some 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> last month powering the 100 kV line while the Keowee transformer re-blocking work was going on.

The controlroom is manned all the time. At the time we went into the control room, there were two operators in the control room.The plant areas we walked around seemed very neat and orderly.

II d 68I0 Z88 £08 I WdBZ:17 S661-Z-TT

March 30, 1995 MEMO TO FILE

Subject:

vRied Lee Combustion Turbine Reliability File: OS-203.00 C-.

  • e This memo documents Revision I to a February 24, 1995 memo-to-file titled "Lee Cobusn Turbine Reliability". Revision 1 to this document replaces the equation used to estimate failure rates when no failures have been observed. Refer to page 2 of the attached referenced memo and attachment 3 for the revised station failure rate.

C.M. Misenheimer, Technical Specialist Nuclear Engineering/Nuclear Generation cc:

P.M. Abraham M.J. Barrett R.D. Boyd E.E.

Burchfield 1.L. Davis CA. Little WX Matthews JR. Newton Central Records 20,d 68TO EBB COS T Wd8E :t' S66T-LZ-TT

February 24. 1995 MEMO TO FILE

Subject:

Lee Combustion Turbine Reliability File: OS-203.00 The Purpose Of this memo isto document the reliability data and results for the Lee CTs, which are used as a source of BACK-Up POWER (when Oconee enters a Tech Spec action statement due to reduced redundancy in emergency power sources) or EMERGENCY POWER (following the Occurrence of loss-of-power events) for Oconee Nuclear Station. There are three CTs at Lee (4C, sC s and 60. Nens)lly, CT-at Oconce is energized from tbeJ00 kv le byt Cetraj 100kv switchyard. When CT at Oconee is to be energized for BAC -P POWER one CT (60 is preferred unit for energizing CT-5) is started and isolated from the grid by way of the Centr White Line by the Lee operator usincnprcod MWfQMA~o complete the lineup, the Oconee control will9Poedr P/// 170 operate the Central OCB's necessary to bypass the Central switchyard and energize heprimary of, aC-5-etfer to Attachment (1) fora schematic of the transmission lines connecting Lee and Central to CT-5 at Oconee. A second unit iA lke in a cstAdby condition-to backup the first unit but not started. When Oconee requires EBRGNCy cone two units

-are started (60 and Xskfeprefnd lineup) with the prefed Unit (6 energiinkg CT-S through the Central White Line while the standby Wit (SC) is left dig but isolated from the switchyard and grid *but supplying its own auxiliaries. Ile reliability of the Cl's to start: on demand during the other modes Of Operation1 Unit Test and System Generation, was not. quantified since the focus Of the analysis was on Lee's ability to furnish power to Oconee on demand. However, the total Run Time accumnulated by all CTs was used to quantify a unit Run Failure rate for the station.

Both Lee and Oconee have approved operating procedures for establishing EMERGENCY POWER OR BACK-UP POWER to Oconee. Le has the capability of stardng a CT either remotely from the Control Roam or locally at the Icapab panel.

After notification by Oconeetat BACK-Up POWER is requ t

t opror will be dispatched to the CT unit to be used. For EMEG N,

E to operator are dispatched to the designated units to be started.

Data has been collectedi for the latest three years 1994, 1993 and 1992) for the purpose ofquan YiLes Combustion Turbine reliability for meeting Oconee's BACK-UP POWER and EMERGENCY POWER demands. Attachment (2) was compiled from Lee operating logs and documents each Crs start record in detail for the three year period.

Attachment (3) exhibits the calculations used to quantify the reliability of the CTs for the three Yea Period. The following unit specific data was calculated:

17'd 6810 EBB £08 T Wd6Z :t' S66T-LZ-TT

Stat Falures For Oconee's power needs, the reliability data of interest is the number of times the unit failed to start on demand. A three year review of unit logs revealed that Oconee requested either BACK-Up or EMERGENCY POWER a total of 35 times. The Station record for meeting those demands, in the Tech. Spec. required time of one hour, was zero (0) failures out of 35 station demands (ie. Station reliability was 100 percent due to additional backup units being available). Of the 35 unit start attempts, the 1st unit attempted failed to start 12 times, the 2nd unit failed to start one (1) time given the 1st unit had failed and the 3rd unit failed to start zero (0) times given that the first and second units had failed start attempts. Therefore, the following start failure rates apply:

Station Failure Rate

= 0/35 The Probability That 1 Unit Will Fail

= 12/35

=

.1

/demand The ProbabiliThat 2 Units Will Fail = 12/35 x 1/12

=

.22/demand The Probability That 3 Units Will Fail 12/35 x 1/12 x 0/1 Since staion failure has been zero in 35 demands, the Chi-Squared Distribution is used to estimate a station failure rate when no failures have been observed. Therefore,'Lee start failure is estmated as:

V7f

-_90, Q

0.V 445 /(2 x 35) =0.0064 /demn a

v 1 It is also pointed out that when we consider all valid start attempts (398) and valid start failures (94) on the individual units as independent events, the start failure probability for the 3-unit system is calculated as:

(0.236) x (0.236) x (0.236) =.Q.011/demand..

Run Failures The review of the station logs revealed 10 instances where a unit had tripped off the line while operating in one of the four modes of operation. Most of the trips were caused by a high temperature alarm of some sort after the unit had successfully completed its startup sequence and was running normally. The remainder of the trips were due to either a Generator Lockout condition or spurious trip. For the three year review period the CIs accumulated a total of 1305.25 hours2.893519e-4 days <br />0.00694 hours <br />4.133598e-5 weeks <br />9.5125e-6 months <br /> of run time. Given the number of trips and unit run hours, the following calculation provides a probability of a single unit run failure:

Single Unit Run Failure Rate = 10 / 1305.25 =

QQl /hour I2 SO'd 68TO EBB 08 T wd6z :17 G66TLEZTT

Should s unit experience a run faure while supplying power to Oconee, another unit could be started and placed into operation.

C.M. Misenheimer, Technical Specialist Nuclear Engineering/Nuclear Generation cc:

P.M. Abraham w/anadune J.R. Newton wo/attachrnents M.J. Barrett Central Records R.D. Boyd J.E. Burchfield J.L. Davis CA. Little W.X. Matthews

SC((j~0 MFRSHISSION LINES CENTRAL J KV aSUroN R

4160 V sraY SLJ a2 y

410VS1YBSe 41~

o 35 f

s.

i i ~

Z&

-1amL 8Lxka

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LEEP STEAM STAT(()f IMK w.zcq LEE GAS TEJB1IES 4$r4 l 4 6IAle/V Lo' 68O Z8 28 TWd0£:t?0 G66T-LE--tT

Lee Steam Station CT St*

Recor d (1992 - 19 94)

ST SlA I1st 2nd 3rd SUCCESS.

8/UL B/U I

B/

W l W UNIT UNIT UNIT START START/

DEM. IRUN DEMADUE iE&M SIR ARIS STARTS RA~i M~

RKM UIREQM RM&

_AK C

1/16192 0560 Systemn Generatilon Yes

-t

____SC 1116/92 0600M Systemn Genewaton -

Yes 1 -

-SC 1/16/92 1415 BaecupPower No 1v~pe 1

1 6CI/111l 1447

-Backup Powei Yes_

_I S~C 1118/92 1757 System Generation Yes_

4C 21/9 1321

__Unit Test Yes_

____6C 2/19 1364

_Unft Test Yes_

1 1I 4C 2/17/92 0918

__Backup Power Yes I

4C 2/18/92 2300 Backup Power No/ -

Tripped on 86G Lockout after 3 1

I___

6 C 2/18/92 2325 Backup Power Yes m

5C 2/2§M9 1405 Ungt Test Yes SC 2/y9 Unknown

__Unit Test No/ -

INo Ignition Aire.

SC 2/26/92 1

0840

__Unit lest I

Ye's_____________

___SC 2/27/00 0_ Unit Test I

Yes_

IHI_4C_12127/9C 1

1400

__Unit Test.

No-Trpped on 86G Lockout.

4CI_214C L9 1120 Unt Test Nal -

MRfped after 6min.

-C

-//9 1010

-UnItlest No -

TrtDped on 86G Lockout.

11__

-4 C

..12f92 1

(0 19 _ Un ~it t I Yes-4C 4//9

.J316_

Unit Test Yes_______3______

A4C1 4/

9 1334 UitITest Yes_

SC I

/L2 1352

__Unit Test No/ -

lTrpped.

1SC 14/1.6/92 060 Backup Power NoI-Sequence taltkve after 20min.

1 5C 4I~ j 054992 Backup Power No/ -

SuPply foalb.1 I

1 AC 4116192 0 0 __Backup owr Yes Page I 7-r-C A/~f )

2C.

Lee Steam Station CT Sta'ecord (1992 -1994)

SC 1411619211 0807 I Baku Power of Sequence, failure after 8 mmn.

1I 5C 4117192 1712

_UnitTest Yes 1 j 1

SC 4/30/92 0822

__Backup Power Yes 4C___/4/92 0927 Unit To t Yes SC__

-1 5/28/92 1 1125

__Unit Test Yes

-SC 6/4/92 1242 Unit Test No/

Tripped after 5 mmn due to loss of

__I_

station services._

_____40 6/41.92 1300 Unit lost Yes 1 1 1 5C 6/11/92 1140 Backup Power Yes I

SC 6123192 0945

!P2ku?,Powe:

Yes 4C 6/25192 1230

Unknown, Yes SC_______6 6/26/92 11230

_ Unknown Yes I

4C 7/13/92 1318 Unknown No! -

Trpped after 4mrn. on temp.

alarm on startup diesel._

______SC 17/13192 111318

__Unknown No!1 Unknown___

___SC 7/ 13/92 111339

__Unknown Yes

-1 4C 7/13192 13=

lUnknown Yes I

-1 50 7/14/92 10828 UnIt Test I No/ -

- Tripped. No reason given.______

5C 7/14/92 Unknown Unit Tost No! -

Tripped. No reason given. Note:.

Not counted as failure since It oppecis to be duotosome a i

-p roblem as previous start failure.

LA_

R___

a 5C 17/15/92 0820

__Bockp ow~e~

No] -

Tripped. No reason given 1K__

1 I

4C 7115/92 0839

__'OCkup Power Yes 60 7/15/92 1316 UnIt Test No! -

Tripped due to Comnbustiona 141 Un II t es.

OutletTemp._

6C 7/15/92 1

ni Ts No! -

Taken oft-line after 7min. to Unkown Uknow No/

repair Fuel 00 loaks.___

.5C 7/16/92 Ukon UnwnN/

Tripped at 0842 on FuelOff Suppf__

-I Page 2

Lee Steam Station CT Stc Record (1992 - 1994) 6C 7117/92 0924 Unit Test Yes 1

5 7117/92 1435 Backup Power No/ -

Tripped ofter 16 mb. due to 1

Sequence Failure.

SC 7/17/92 1600 Backup Power No/

Tripped ofter 7 min.. reason not given. Note: Not counted as falure since It appears to be due Ito some problem as previous I

40 7/17/92 1510 Backup Power Yes SC 7117/92 1629 Backup Power Yes

'1 1

1 6C 7/19/92 0120 Bockup Power Yes 6C-7(20/92 1043 Unit Test Yes SC 1 7120/92

=1050 lUnit Test Yes 6C 7/20/92 1S34 Unit Test No/ -

Tripped after 21 mn. on Overspeed.

- C 7/27/92 1306 Unknown Yes SC 7/27/92 1305 Unknown No/ -

Tdpped after 16 min. on

-Overspeed.

6C 7/27/92 1306 Unknown No/ -

Tripped after 20 min. on Sequence Fallure.

SC 7/27/92 1330 Unknown No/ -

Tripped after 8 min. on.

Overspeed. Note: Not counted as failure since It appears to be due to some problem as

-previous start falure.

6C 7/27/92 1336 Unknown No/ -

Unit emergency trIpped at 3910 rpm, after 10 mb. Overspeed Trip

_did not frip unit.

6C 7/27/92 1421 Unknown No/ -

Tripped after 6 mn. on UCombustor Outlet Temperature.

6C 7/27/92 1500 Unknown No/ -

Trpped after 24 mTn. on Fuel I

I_ _

Supply Failure.

6C 7/27/92 1635 Unknown No/ -

Tdpped after 3 mln. on Combustor Outlet Overtemperature. Note: Not counted as failure sace It appears to be due to same Page 3

Lee Steam Station CT St Record (1992 - 1994)

SC 7/27/92 Unknown Unknown No/ -

Tdpped after a few minutes on Ovefspeed.

6C 7/27/92 Unknown Unknown No/.-

Tdpped after a few minutes on Comb. Out Fire. Note: Not counted as failure since It appears to be due to same

. problem as previous start follure.

SC 7/28/92 0915 Unit Test No/ -

Tripped after 16 mi. on Fuel Supply Falure ond Loss of AC

]Power.

6C 7/29/92 0813 Unit Test TNo!-

Tripped, did not fire after 3 mn.

6C 7/29/92 0820 Unit Teat Not -

Unknown. Note: Not counted as failure, assumed to be due to.

some problem as previous start failure.

6C 7/29/92 1044 Unit Test Yes SC 7/30/92 0806 UnIt Test Yes

-4C 7/3092 1234 Systern Generation Yes

_SC 7/30/92 1240 System Generation Yes/No TrIpped after 3 hours3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br />. Reason 6C 7/30/92 1265.

System Generation No/ -

Tripped, reason unknown.

6C 7/30192 1329 System Generation Yes/No Tripped on High LUbe Temp.

C 73012

-after running for 26 n-din.

6C 7/30/92 1436 Systm Generation Yea/No ed on High Lube Temp.

after running for 28 min. Note:

Not counted as failure since It appears to be due to same problem as previous start failure.

SC -7/192 1619 S) smGenerton No! -

Trped after 2 m.

Reason unk.

SC 73092 1629

- System Generation Yes/No TrIpped after 31 rnnI

_4C 8120/92 Unknown Unknown Yes 6C 8 =2092 Unknown Unknown Yes SC 8/261/92 2306 Emergency Power No/ -

Tripped after 5 min. on Fuel 1

1 8/26/92 2305.-

Emergehey Power Yes Page4*

Lee Steam Station CT fta*Record (1992 - 1994) 14 C B/26/92 2313 Emergency Power Yes SC 8/26/92 2350 Emmgency Power No/ -

Tripped on Fuel Supply Failure, 1

- C 12

/92?

1325 Unit Test Yes

__4 C

1012/j92. 1325ow

_UnitTest Yes AC1011/92 JUnknown I Unit Test Yes

__I 6C 10/18/92 JUnknown nIt Test No/ -

Tripped on Combustor Outire.______

6C__-

10/18/92 Unknown Unit Test No/ -

Ttipped on Combustor Out~re.

Note: Not counted as failure since It appears to be due to same problem as previous start 16C 10/25/92 Unknown Backup Power Yes/No Rtm Failure -Tripp ed on High1 1

1

~4C 10/25/92 1440

__Backup Power Yes___________

4__

C 11/292 1502

_Unit Test Yes

___6C 11/292 1603

__Unt Test Yes

_____5C 111292 1620 UndtTestd Yes 4C1111192 1540 Unit Test Yes

~~SC 11/11/92 58

_UnitTest Yes 6C 11111/92 1620 Unit Test Yes 4

12/2/92 1 098 Unit Test Yes-03_

1C 12/92

.1 0945 Untoet Yes 11 1 SC 72f2M j 1100

_Bocko Poer.

yes SC 12/18/92 Unknown

__Unit Test yesa 1

1 1

6C 1/1 / 13 0507

__Backup Power Yes Page 6

Lee Steam Station CT St Record (1992 - 1994) 4C 1/4/93 1445

-Unit Test No/ -

Dd not start due to 'Loss of Starting Device alorm. Problem due to Emerg. Stop button on starting diesel was engaged. Corrected problem and unit started.

6C 1/4/93 1500 Unit Test Yes AC 1/4/93 1605 Unit lest Yes 6C 118/93 0830 UnitTest Yes SC 1/18193 0913 Unit Test Yes 4C 118/93 1014 Unit Test Yes 1

1 1

6C 126193 0954 Backup Power Yes 6C 2/2/93 0945 1

Unlt Test Yes SC 2//93 1000 Unit Test Yes C

1 2-93 1030 I Unit Test Yes 6C 2/15/93 1016 Unit Test Yes SSC 2/15/93 1020 Unit Test Yes I 4C 2/16/93 1141 Unit Test Yes I

1C 2/19f93 06CO System Generation Yes 4C 2/19/93 0606 System Generation Yes 6C 2/19/93 0608 system Generation Yes

._SC 3/1/93 1024 Unit Test Yes I

6C 31193 1110 Unit Test Yes I AC 31/93 1145 Unit Test Yes 4C I13/15/93 0435 System Generation Yes SC 3/15/93 0600 System Generation No/ -

SC didn't start. Loss of storting device olarm. Unit restarted with 6C 3/16/93 0521 System Generation Yes

. no problems.

SC 3116/93 0622 System Generation Yes AC 3/19/93 0600 System Gereroffon -

Yes

_I 6C f3/19193 0618 System Generation Yes SC 3/79/93 0625 1

System GeneratIon I

Yes I

Page 6

Lee Steam Statlon CT Sta Record (1992 - 1994)

S AC 4{7193 1400 Unit Test Yes 6C 4/7/93 1402 Unit Test (No Unit would not go on turning gear Falure) to get 'ready to start light*. Found timer bad on controls for turning gear and replaced.

SC -

4/7/93 1 1428 Unit Test Yes 1

1 6C 4/13/93 0451 Backup Power Yes 6C 5/3/93 1037 Unit Test No/ --

Unit wodd not start. Got a

  • combustor out-lire' or 'recorder off alarm.

6C 513/93 1413 Unit Test Yes

-C 5/4/93 0850 Unit Test No/ -

Unit failed to start. Overspeed Trip was not reset, not letthng unit fire.

Reset overspeed trip and started unit.

4C 11 614193 0866 Unit Test Yes SC 5/6/93 1010 Unit Test Yes 40 5/10/93 1515 System Generation Yes SC 6/10/93 1616 Systei Generation Yes

- 6C 6110/93 1625 System Generation Yes SC 6/18/93 1435 System Generoilon No! -

SC didn't start. Loss of starting device alarr. Unit restarted with no problems.

6C 5/18/93 1435 System Generation No/ -

Unit did not start. Hod *sequence falturo' alarm. Restarted unit with no problems.

4C 5/18/93 1440 System Generation No/ -

Unit failed to start. Received

'Sequence Failure

  • arm.

Restarted unit with no problems.

6C -6/18/93 1442 System Generation Yes 1 SC 518193 1450 System Generation Yes

-F Page 7

Lee Steam Station CT Star ecord (1992 - 1994) 6C 5/22/93 0734 Backup Power No/ -

Unit would not start. Combustor 1

outlet over temperature" alarm.

Found fuel system adlusted out of caibration due to a faulty fuel manifold gauge.

1 SC 5/22/93 0740 Backup Power Yes 6C S5/22/93 1352 UnitTest Yes 6C 6127{93 1300 Unit Test Yes C'

6/1/93 0957 UnitTest Yes AC 6/1193 1102 UnitTest Yes 1

6C 6/2/93 0830 Backup Power No/ -

Unit didn't start. 'Comb. out-fire' I

alorm. When unit coasted down we restarted with no problems.

I 6C 6/2/93 0850 Backup Power Yes

-C 6/2/93 0901 Unit Test Yes SC 6/8/93 1222 System Generation Yes I 6C 6/8{93 1226 System Generation Yes 4C 6/8/93 1231 Systern Generation Yes 4C 6/9/93 0930 System Generation No/ -

Unit foiled to start. Received

'Sequence Fallure' alarm.

-Restarted unit with no problem.

SC 69/93 0930 System Generation Yes I

6C 6/9193 0937 S1ystem Generation I Yes I

- 4C 6/9193 0953 System Generation Yes

-C 6{10/93 1117 System Generation Yes a

6C 6f10/93 1119 System Generation Yes L

4C 6/18193 1340 System Generation No/ -

Unit falled to start. 'Sequence Failure' alarm. Restarted unit with no, major problems.

if___

-C 6(18f93 1360 System Generation Yes

-6C-6f18193 1357 System Generation Yes

-C 618/93 1414 System Generation Yes Page 8

Lee Steam Station CT Start ecord (1992 - 1994) 4C 6/28/93 1040 Unit Test No/ -

DIesel tripped due to low level In radiator.

-C 6/28/93 1120 Unit Test Yes 6c 7/2/93 1410 Unit Test Yes SC 712/93 1433 UnItlest Yes SC 7/10/93 1306 System Generation nYes 6C 7/10/93 1306 System Generation Yes/No Run Fallure -Unit tripped due to 4high Lube Oil Temp.' Found 15.2 I out of calibration.

I4C 7/10/93 1333 System Generalon Yes 6C 7/10/93 1449 System Generalon Yes/No Run Falure-Unit tipped due to

'high Lube Oil Temp.' Found TS-2 out of calibration. Not counted as falure since It appears to be due to some problem as previous Pun failure.

60 7/10/93 1612 System Generolion Yes 6C 7/- l993 1011 System Generation Yes iSC 7/19/93 1018 System Generation Yes C

7119193 1020 System Generallon Yes 6C 7/28/93 1230 System Generation Nol-Unit did not start (Loss of starfing device). Restarted using I

_superchargilng fan.

6C 7/28/93 1230 System Generation No/-

Unit trpped on startup.(sequence of events). Restarted unit With no problems.

40 7/28/93 1258 system Generation Yes 6C 7/28/93 1316 system Generalon Yes SC 7/28/93 1327

_System Generailon Yes 6C 7/28/93 1649 System Generallon Yes/No Run Foilure -Unit tripped twice due 1

to *high seal oil temp.' seal oll temp found to be 122. Note: This was counted as I Run Folure.

Page 9

Lee Steam Station CT Sta

  • Record (1992 - 1994)

SC 7/29/93 1100 system Generation No/ -

Unit did not start (Loss of starting device). Restarted using supercharging fan. After unit was running the electicions found breaker supplying power to resistors cut off causing motor to shut off. Thh Is probable cause of problem on 7t28{93.

SC 7/29193 1121 System Generation Yes 4C 7/29/93 1123 System Generation Yes 6C 7/2L93 1126 System Generation Yes

-C 8/4193 1335 UnitTest Yes 4C 8/16193 1443 system Generaton Yes 6C 8/16/93 1445 System Generatfort No/ -

Unit didn't start due to *Loss of Starting Devicem. Restarted unt

_wth no problems.

6C 8f16/93 1451 System Generation Yes I SC 8/16/93 1510 System Generation Yes S -6C 8/20193 1405 Unit Test Yes 6C g{23/93 1004 UnitTest Yes SC 8/24/93 1100 System Generation Yes 6C 8/24/93 1100 System Generation Yes

- AC 8/24/93 1103 System GeneratIon Yes 4-8/25/93 1102 Sstem Generation Yes SC 8/25/93 1104 System Generation Yes 6C 8/25/93 1110 System Generation Yes I4C 8/26{93 0656 System Generation Yes SC 8/2693 0700 System Generalion Yes I

6C 6 8(26/93 070 System Generation Yes 4C 8/30/93 1200 System Generation Yes

-t_

SC 809 1200 System Generoffon yes 11 6C 8/30/93 1200 System Generafton Yes Page 10

Lee Steam StatIon

' Record (1992 - 1994) 6 1 C

8/31/93 0616

__Backup Power Yes

_____6C 8/31193 11(E0 SYStOM GeneratIOn Yes SC 8/31/93 1125 ystern Generation -

Yes

______4 C

8131/93 1135

__Syser Generaff on yes

-6C_

9/1/93 1247

__System Genercon Yes

-Ui i

o tr Oesedhp 00

~~5C 9/1/93 1250 System GenetdIon No/

Untddntsat-OesedTi Alarm). Reset manual oversped Go ___

SC 9/1/93 1310

__System Generation -

Yes

-hpadrsatdtrie 4__

C 9/1193 1315' System Generation -

Yes 1 1 1

SC 9/7/93 0345

_BockupPower Yes

-~~~

6C 9/15/93 1 1245

__UnitTest Yes

___________5C 9/15/93 1

1315

__Untlest Yes

___________4C 9115193 1 1400 Untlest yes

-6C 9/16/93 1130 UnRt Test Yes No Failure - Started to test motor

- rwosltr 6C 10/3/93 1030 Unit Test No/ -

Unit dd not start (Combustor Ouhfire). Did not try to restart that

-day.

AC.

10193 1035

__Unit Yost Yes SC I0 14i]93 0830

__UnIt Test Yes 4C 11/3/193 0601 System Generation -

Yes C-

-11/3/93 1

0632 ytem Generation -

Yes_____________

_____6C if11393 1030 Unit Test Yes 6C 11/23/93 1356 Unftlest Yes SC 11124/93 0858

_Unit Test Yes Io 4C 12/3/9 1116

__Unit Test Yes Co~~o

-~~

AC ~ 12/1/93 0917

__Unit Teet Yes Page I I

Lee Steam Station e 's Record (1992 - 1994) 6C 1214/93 0947 Unit Test No/ -

Unit would not start due to

  • Combustor Oufiro'. Shop 1-

-1 replaced swark plug.

6C 12J4/93 0957 Unit Test Yes 4C 12/11/93 1030 Unit Test No/ -

Unit tripped on 'Combustor Outfire dorm. Found 2 baskets not firing and replaced.

4C 12115S93 1337 Unit Test Yes 4A 12/29/93 0737 System Generation Yes 6C 12/29/93 0742 System Generallon Yes 6C 12/30/93 071---

.6.em Generation No/ -

Reason Unknown.

4-4C 121093 0742 0SLystern Generation yes 6 12/30193 05

%!stem Generation Yes SC 12/30/93 1600 Unit Test No/ -

Unit did not start (Overspeed Trip 1 1 not reset)

SC 123 UnitTet Yes V_6_6_nttestyes C114194 0935 Unit Test Yes 6C I 0935 Unit Test Yes 5C 1/14/94 0954 UnitTest No/ -

Unit didn't start. 'Combustor Outfire olarm.

SC 1/14/94 1008 Unit Test No/ -

Unit ddnl start. *Combustor Outfire alarm.

SC IIf4L94 1305 UnitTest Yes 4C 1/17/94 1317 UniTest Yes 4C 1/18/94 1730 System Generation No/ -

Unit didnt start. 'Combustor Outlet 4C

-1/1894 1742 S

mGeneration Y;

Tomp.' Alorm.

6C 1/18/94 1803 System Generoilon Yes

-1 4C 1119194 2254

.System Generation Yes BC 1/21/94 0659 System Generaflori No/ -

Unit didn't start. !Combustor e

6C I/t~ /94 0659em one od ou re m

- darm.

Page 12

Lee Steam Station CT

'~Record (1992 -1994) 5C 1/21/94 0712 System Generation No/

Unit dldn't start. 'ombstor Outfire,

  • alarm, Baskets 02 and #5 not 4C 1/21194 0725

__Systemn Generation Yes

______60 1/21/94 0 727

__~seM Generation IYes I

___5C 1/21/94.

.1551 Urit Test Yes CO 6C

/79 1765 System Generation No/ -

-Unit

'Not Rotating' alarm, Reset

0) alarmn and started unit.

______e)______

4C 1/ 27/94 1756 System Generation-Yes

______3_______

CS)

CD 5C 1/27/94 1800 System Generation No/ -

-Unit didn't start. toss of Stolng

__________60 1/27/94 1829

__System Generation -

Yes Dvc'aam

_____SC 1127194 1832 System Generation Yes 5C 1/31/04 0823 unit Test No/

Unit dldn'tstart. 'Loss of Starting C

1/31/94 0850 Unit Test Yes

-Dvc'aam I

6C 213/94 1640 BaCwDp Power.

yes 6C 2/9/94 1115

_Unit Test yes 6C

/59 1315

__Unit Test yes

_____40 2/16/91_4 1415

__UnIt-Test yes 6C 3/1/94 1058 T

Unit Test Yes 4C 3/1/94 1117 Unit Test

-No/

1dpped unit due to oil leak on

'Overspeed Trip Valve'. Repaired land started unit,

___________SC 3/1/94 1120

__Unit Test Yes E-

-40 3/294 1012

__Unit Test Yes

___SC 3/15/94 1034

__unit 7est Yes 4C 3/15/94 1035 ntt 7st yes 6C 3/16/94 1037

__Unit Test Yes 4C 4/6/94 1000 Untt Test

-No/

-Unit-wouldnt start due to 'Low I 4C0 41 94 1 1042 1_ UnIt Test Yes Page 13

Lee Steam Station

'w)Record (1992 -1994) a-C 4

-a Yes I

6C__

4/5(94 1050 Unit Test I _

_6C 4194 1156 LB loo stPo e Yes 4C' 4/15/94 1250 Un-It Test No/ -

Unit wouldnl start. Sequence

______~~~S 4/15/94 1255

__UnItTest Yes 4C 4/115/94 130V8 Unit Test Yes 0i 4~-C 4/17(94 0942 Unit Test Yes No Failure -elac start test.

.4--

SC 4/18/94 1016 Urit Teet Yes

-No Falure-Block Start Test.

C 6 4/18/94 1040

_UnhItest Yes No Fallure -BMack Start Test-

-C

-1 4/26194 1355

__System Generation Yes 6C__

1___6 4/26/94-1444

__Systeriil Generaion -

Yes SC 14126194 1445

_ ysem Generation Yes 6C 14/26/94 1721 SYstem Generation No/ -

Unft tripped on 'Combustor Outlet

~6C 4/26/94 1740-

_Sstemn Generaff on Yes vreTrtuearm A~~C 4/29/94 1330

__Sysemn Generation -

Yes

~6C 14/29/94 11330 JSystem Generation -

Yes

___SC 14/29/94 1350

__System Generation -

Yes I__

4C

§13/94 1525 Unit Test Yes__

-4 C

5/10/94 0845 UntTest Yes 6C 5/10/94 1105

__Unit Test Yes

~6C 5/11/94 1315 Systemn Generatton Yes SC 6/13/94 1600 Unit Test No/ -

Un~t tripped due to problem with

______Fuel 01 Relief Volvo.

S~C 5116/94 1454

__UntTet Yes 1

1

____60 5/4/94 1105 BCKwm Power yes Page 14

Lee Steam Station "O Record (1992 - 1994)

CD 1 1-6C 5128/94 2315 Backup Power Yes 4C 6/1/94 0932 UnIt Test No/ -

Unit dildn' start. *Sequence Failure 4C &-119 ID99 I

Alarm'.

-4C 6/94 0949 Unit Test Yes SC 612194 1005 Unit Test Yes OD o

6__-

4C 61294 1612 Un lt est Yes C

1 6C 61194 1712 BcuPowr Yes 6C g

1215 System Generaion Yes SC 6/df94 1220 SystemGeneration Yes

-AC _614-94 1315 System Generation Yes AC 6/16/94 0930 System Generation Yes/No Run Failure - unit tripped due to

'High Bearing Temperaturea.

SC 6/15L94 1205 System Generation Yes 6C 6/15/94 1205 System Generation Yes 4C 6/15/94 1220 System Generation No/ -

Unit did not start due to

_____'Combusflon Outfire* alorm.

c 1594 1230 System Generation Yes SC 6/16/94 1150 System Generation Yes 4C 6/16/94 11IS System Generation Yes 6C 6/17/94 1200 System Generation Yes AC 6/17/94 1254 System Generation No/ -

Unit did not start due to 5C 16/1'Combustion Outire

  • dorm.

SC 6/17/94 1254 System Generation Yes 4C 6/17/94 1336 System Generation Yes/No Run Fallure - unit tripped due to

-Generator Lockour.

4C 6118/94 0917 Unit Test Yes

-SC 6/20/94

-0950 UnIt Test Yes SC 6/20/94 1122 System Generation Yes 6C 6/2094 124 System Generaton Yes 4C 6/20/94 1128 System Generation No/ -

Unit didn start due to Sequ

-L-Faliure alarm.

Page 15

Lee Steam Station CT

' p Record (1992 - 1994) 4C 6/20/94 1201 System Generation Yes/No Run Failure - unit tripped due to

0.

"Generator Lockotf.

4C 6120f94 1415 System Generallon Yese.

5C 6/21/94 1215 System Generation Yes.

4C 6/21/94 1220 System Generation No/ -

Unit didnt start due to I

  • Combustlon Outffre olarm.

D-4C 6f21194 1226 System Generation Yes O6C 6/21/94 1249 System Generation No/ -

Unit dldn't start. 'Combustor Outfire

_)

1__

. alarm.

6C 6/21/94 1323 System Generailon No/ -

Unit didn't start. 'Combustor Ouffire OO 0

aarm. Note: Not counted as start follure since It appears to be due' to the same problem as the 6C 6/21/94 1434 System Generation Yes

start, 6C 6/23/94 1653 Bookup Power Yes 4C 7/11/94 1000 UnitTest No/ -

Unit ddn? stort due to

-Combustion Outtire' alarm.

SC 7111194 1015.

UnIt Test ves 6C 7/11194 1030 Unit Test Yes AC 7/11/94 1052 Unit Test Yes 4C 8/1/94 7230 Unit Test No/ -

Unit didn't start due to 'Sequence Folluro' alarm.

SC 8/194 1230

_Unlt Test Yes 6C 8/1/94 1230 UnitTest Yes 4C 8/1/94 1340 Unit Test No/ -

Unit didn't start due to 'Sequence Falluro* olarm.

4C 8/1/94 1348 Unit Test Yes SC 4C 8/2/94 1035 UnitTest Yes 4C__ 8/15/94 0830 Unit Test Yes 6C 8/16/94 1030 Unit Test Yes

-O 6____SC 8(1694 1040 Unit Test Yes

-C 9f1/94 0725 Unit Test Yes SC 9/1/94 0954

_Unit Test Yes Page 16

Lee Steam Station CT

  • P Record (1992 - 1994) 4C 9115/94 0745 Unit Test Yes 6C 9/15/94 0945 Unit Test No/ -

Unit didn't start. 'Combustor Outtire a alarm. Found Oll Return Volve closed causing Ol Manifold to become overpressurtzed.

CD

_6C 9115f94 0953 Unit Test Yes O__

SC 9/2694 0834 Unit Test Yes 0

6C 9130/94 0945 UnihTest Yes

- C 10/31/94 0830

_UnitTest Yes SC 10/31/94 0830 Unit Test Yes 6C 10/31/94 0915 Unft Test Yes 6C

.10/31/94 1115 Backup Power Nof -

Unit did not start. Recelved

  • Combustor Outfire Temperature' alarm. Restarted 6C wth no problems.

1 6C 10/31/94 1120 Backup tower yes 1

SC 10/31/94 1800 Backup Power No/ -

Unit did not start. Received

'Overspeed Trip' darm. Monually reset overspeed trip device and

-restarted unit.

10/31/941 18 Backup power No/ -

Unit did not start. Received Sequence Fallure' alarm. Started SIC I

1 C or backup pow er.

1 1

4C 10(31/94 1823 Backup Power Yes 6C 11/1/94 0745 Unit Test No/ -

Unit did not start. Received

'Overspeed Trip' alarm. Found 6C 11/1/94 02 UOverspeed Tdp Coll burned up.

6C 1(194 832 Unit Test yes SC 1113/94 1250 Unit Test No/ -

Unit did not start. Received

.restarted unit.

SSC 11/94 1310 L UnitTest Yes Page 17

Lee Steam Station CT

  • P Record (1992 - 1994) 6C 11/21/94 1030 Unit Test Nof/-

Unit did not start. Ignitors 3.A. 10 did not fire, 6C 11/21/94 1420 Unit Test No/ -

Unit dld not start. Ignitor number 6 did not fire.

6C 11122194 1028 Unit Test Yes

-SC 11124194 1338 Unitlest Yes a

6C 11/28/94

. 1158 Backup Power No/ -

Unit did not start. Received S*Combustor Outfire' alarm, 6C 11/28/94 1206 Backup Power No/

Unit did nottart. Received

.Combustor Outlet

-Overtemperaturo*.

Tried to use supercharger fan to restart. Note:

Did not count as start fallure since it appears to be related to the previous start (llure.

1 SC 11128/94 1210

_Backup Power Yes 6C 11/28/94 1218 Backup Power Nol -

Unit did not start. Received

  • Combustor Outlet Overtemperature. Tried to use supercharger fan to restart. Note:

Did not count as start foilute since It appears to be related to the

__prevIous start failure.

60 12/11/94 0925 Backup Power No/ -

Unit ddn? start. 'Combustor Outfire Overtemperature. Found Fuel Selector Switch broke allowing both fuels to be bumed at the some ime.

4C 1211/94 0940 Backup Power No/ -

Unit ddnt start. Found Sensor In Diese[ Starting Motor defective, 1

1 4C 112f11/94 Unknown UnItTest Yes 6C 12/12/94 1646 Unit Test No/ -

Unit didn? start, 'Combustor LO Outire Overtemperature'. Note:

Did not count as start failure since it appears to be related to the previous start folure.

Page 18

Lee Steam Station C

'Ip Record (1992 - 1994) 6C 12/1294 1605 Unit Test Not -

Unit didnt start. *Combustor Outire, Overtemperature*. Note:

Did not count as start fallure since It appears to be related to the previous start failure.

6C 12112/94 1630 1 Unit Test Yes 1

6C 12/20/94 1045 Backup Power No/ -

Unit didnt start. 'Combustor Outfiree oform.

S 6C 12/20/94 10S2 Backup Power Yes Bockup Power 00 1

6C 12/28194 1158 Backup Power No/ -

Unit didn't start. 'Combustor Outire' alarm.

6C 12/28/94 1204 Backup Power No) -

Unit didn't start. 'Combustor Outfire' oarm. Note: Did not count as start faliure snce It appears to be related to the 2previous start failure.

5C 12/28/94 1206 backup Power No/ -

Unit didn't start. 'Combustor Ouffre 1_

0 alarm.

SC 12/28/94 1210 Backup Power No/ -

Unit didnt start, "Combustor Ouffire

  • alorm. Same problem as previous start. Did not count as stort fallure.

AC 12/28/94 1227 Backup Power Nol -

Unit didn't start. OCombustor Outfire 'alarm. Restarted unit with I_

no problems.

I 14C 12/28/94 1230 Backup Power Yes 1

SC 12/28/94 1242 Backup Power No/ -

Unit didn't start. *Combustor Outfire

' alarm. Same problem as previous start. Did not count as start fallure.

6C 12/28/94 1249 Backup Power Nol -

Unit didn't start. 'Combustor CL Outtire' alarm. Note: Did not count as start fallure since It appears to be related to the previous start failure.

1 6

12128/94 1311 BockupPower Yes SC 12/28/94 1350 Backup Power Yes/No Run Failure - unit started but tripped when supercharger fon was started.

Page 19

Lee Steam Station

'Up Record (1992 - 1994)

SC 12/28/94 1434 Backup Power No/ -

Unit didt start. Unit didn't fire.

-~

12,18/94 443

-operator tEipped.-

1443 Backup Power No/-

Unit didn't start. Unit didn't fire.

Found Overspeed Trip not reset.

Note: This was not counted as a start failure shoe the previous start failure appeared to be due to the

-I1_

some cause.

C -2894140 Backup Power Yes 35 35 23 11 23

01) 10 END OF DATA Compiled By: CMM Last Update: 2/23/95 Note: Mullipe folluros of IndMdual units which o ed to be lue to the some caus were counted as 1 failure.

h-C ki Page 20

Lee Combustion Turbine Reliability (1992 - 1994)

Unit Stor Failure Rates For All Vagid Starts and Failures 4C Lu

=

0.211

/demand W

123 tot. demands 6C2 failures

=

0.23 /demand 143 tot. demands 6C0.221

/demand 131 tot. demands Start Failure Rate.

4 tot, failures

=

0.236 /demand of 3 Unit System 398 tot. demands Unit Foilure Raees For Suoolgv Oconee BockuoIEmeroecy Power Probability of I Unit J2 failures 0.343 /demand Failing to Start 35 tot. demands obabilty of 2 Units 1i2x 0.2/demand SWfling to Start 35 12 Probabilfy of 3 Units 12xx 0 Falling to Start 35 12 1

Single Unit Run

.Q run flures 0.0077 /hour Failure Rate 1305.25 tot. hours Station Start Failr eor Suplying ocnee Bckv Power Station Failure Rate failures 35 tot. demands Estimated Station 0.0064 /demand (Rev 1)

F *lure Rate 2 x 35 ATTACHMEN 3 ZT' 68O ZB Cs TWdOS

VO S66T-2.Z-T1
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