ML17308A256

Forwards Diesel Generator Info,Per 860729 Request & 860812 Telcon Re Review of 860507 Application.Emergency Diesel Generator History,Failures,Preventative Maint & Reliability Improvement Programs Discussed

ML17308A256
Person / Time
Site:	Saint Lucie
Issue date:	08/15/1986
From:	Woody C FLORIDA POWER & LIGHT CO.
To:	Tourigny E Office of Nuclear Reactor Regulation
Shared Package
ML17216A664	List: ML17216A663 ML17216A665 ML17216A666 ML17216A667 ML17308A256
References
L-86-342, NUDOCS 8608190282
Download: ML17308A256 (28)

Text

g '"A REGULATORY INFORI'lATION DISTRIBUTION SYSTEt'I (R IDB>

ACCESSIQN NBR: 8608190282 DOC. DATE: 86/08/15 NOTARIZED: NQ DOCH,ET N FACIL 50-389 'St. Lucie Plant Unit 2 Florida Power ic Light Co. 05000389 AUTH. NANE AUTHOR AFFILIATION WOODY> C. 0 Florida t Power 8< Li g h Co.

, RECIP. NANE RECIPIENT AFFILIATION TOURICNY> E. Q. PWR Pro J ect Directorate 8 5~ gc;y- '>

BUB JECT: Forwards diesel generator info> per 860729 request 8< 860812 tel con re. review oF 860507 app l i cation. Emergency di esel generator hi story> fai lures> preventative maint Cc rel iab i I itg improvement programs di scussed.

DIBTRIBUTION CODE: A001D TITLE: QR COPIEB RECEIVED: LTR Submittal: General Distribution l ENCL j BI ZE: j 3 NOTES:

RECIPIENT COPIES RECIPIENT COP IES ID CODE/NANE LTTR ENCL ID CODE/MANE LTTR ENCL PWR-B EB 1 1 PWR-B PEICSB 2 2.

PWR-B FQB 1 1 PWR-B PD8 LA 0 PWR-B PD8 PD 01 5 5 TQURIQNY> E 1

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PWR-B PElCSB 1 1 PWR-B RSB 1 INTERNAL ADll/LFNB 1 0 1 0 NRR/ORAB 1 0 EG FILE 04 1 RQN2 1 EXTERNAL: ECR S LPDR 03 1 NRC PDR 02 NSIC 05 1 1 TOTAL NUiNBER OF CQP IES REQUIRED: LTTR 22 ENCL 18

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~'(u.k,(I N FLORIOA POWER & LIGHT COMPANY August 15, 1986 L-86-342 Office of Nuclear Reactor Regulation Attention: Mr. E. G. Tourigny, Project Manager PWR Project Directorate /$ 8 Division of PWR Licensing - B U.S. Nuclear Regulatory Commission Washington, D.C. 20555

Dear Mr. Tourigny:

Re: St. Lucie Unit 2 Docket No. 50-389 Diesel Generator Information Florida Power 8 Light Company is submitting the attached information in response to your request dated July 29, l986 (E. G. Tourigny to Mr. C. O. Woody),

and clarified during an August l2, l 986 conference call between members of NRC and FPL staffs. As discussed during the August l2 call, more in-depth information can be provided if necessary for you to complete your review of our May 7, l 986 application. However, additional time will be needed to gather the more detailed information.

FPL is available at your convenience to discuss this matter further, if necessary.

Very truly yours, C. O. Wo dy Group Vice President Nuclear Energy CO W/R JS/cvb Attachment cc: Dr. J. Nelson Grace, USNRC, Region ll Harold F. Reis, Esquire, Newman & Holtzinger 8b08i90282 8b08i5 PDR ADOCK 05000389 P PDR OO0<

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Question I NRC REQUEST:

Please provide a complete operating history of the EDG's to include:

A. Pre-Operational Testing B. In-Service Surveillance Testing C. Maintenance and/or Repair History D. Failure History E. Analysis of all Failures and Follow-Up Actions Question I FPL Response:

A. Pre-Operational Testing Pre-Operational Testing was performed in accordance with Reg. Guide I.68, Appendix A, "Initial Test Program," paragraph g.3, "Electrical Systems," and the St. Lucie Unit II FSAR, sections l4.2.I2.1.3.G, "Integrated Test of Engineered Safety Features.," and 14.2. I 2.I.3.H, "Diesel Generator and Auxiliary System Proportional Test." The acceptance criteria specified by these documents were met and the system declared operable during the pre-operational phase of Unit ll pre-license construction testing.

B. In-Service Surveillance Testing Diesel Generator ln-Service Surveillance Testing has been performed in accordance with the requirements of Unit II Technical Specification 4.8.I.I.2.a. The schedule for this testing is determined by Table 4.8-I. Test results are analyzed according to the criteria set down in Reg Guide l.l08, Rev. I. Any required reporting has been handled as per the specification of T.S. 4.8. I. I.3 and IO CFR S0.73.

C. Maintenance and/or Repair History At the St. Lucie Plant, maintenance and repair work on the diesel generators is divided between the three maintenance departments: mechanical, electrical and instrumentation and control.

A task team assigned to improving diesel generator reliability is currently at work analyzing the Plant Work Orders (PWO's) for, all diesel generator work, The response to question S provides more information on the task team job assignment and research. Repair history summaries are included in the reports referenced in Question I, Section D. '

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Question I FPL Response (continued):

D. Failure History As stated in the response to Question I, Section B, the determination of valid tests and failures is performed in accordance with the requirements of Reg.

Guide I.I08, Rev. I, and reported in accordance with Unit II T.S. 4.8.I.I.3, applicable. The following table summarizes the reports filed and 'hereever therefore the Plant's failure history for the stated period for the indicated diesel generators:

Date DOCUMENT DOCUMENT TITLE 07/28/83 LER 335-83-37 2B D/G Output Generator Failure I2/20/84 Special Report 2B D/G Fan Hub Failure I2/I9/8S Special Report 2B Speed Change Motor Failure 03/I2/86 LER 389-86-6 2A D/G Governor Failure 03/26/86 Special Report 2B D/G Governor Failure 07/09/86 LER 389 I I 2A D/G Governor Failure 2B D/G Fan Rubbing Shroud Attachment I to this response contains the Special Reports and LER's mentioned above. Further documentation can also be found in FPL's response to Enclosure 2 of Generic Letter 84-l5 regarding the St. Lucie Plant.

E. Analysis of all failures and follow-up actions:

As per T.S. 4.8.I.I.3 and Reg. Guide I. I08, LER's and Special Reports provide event analysis and Plant follow-up actions. See response to Section D above.

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QUESTION 2 NRC REQUEST:

Please provide specific information on the most recent failures which have resulted in EDG surveillance testing at the maximum frequency (3 days).

FPL Response:

As indicated in the response to Question I, Section D, failures are reported in accordance with T.S. 4.8.l. I.3 and Reg. Guide I. I08. Only the most recent failure has resulted in testing at the maximum frequency. Please see LER 389-86-I I for the information requested.

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QUESTION 3 NRC REQUEST:

Please provide dates and identifying numbers of LER s covering the above failures.

FPL Response:

Please see the response to Question I, Section D for the required information.

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U U U QUESTION 4 NRC REQUEST:

Please provide details of licensee s preventive maintenance program.

FPL Response:

All three maintenance departments have a Preventive Maintenance Program. The PM programs have been developed through FPL diesel operating experience and vendor recommendations. The Mechanical Maintenance Department has the most extensive. program as shown in the attachments. The Electrical Maintenance and Instrument and Control Departments'M's are outlined below. The procedures are provided in Attachment 5/2.

Performance Electrical Preventive Maintenance Procedures Interval Emergency Diesel Inspection I8 Months Proc 82-2200062, 2-2200063 Load Sequence Relay Test l2 Months Proc 7/2-09 I 0053 Performance I&C Preventive Maintenance Procedures Interval Inspect all oil press, water temp, and l8 Months fuel gauges Fuel oil transfer pump 2A, 2B discharge l8 Months press, gauges Tank level calibrations I8 Months R JS4/043/6

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QUESTION 5 NRC REQUEST:

Please provide details of licensee s reliability improvement program.

FPL Response:

A Quality Improvement Team (QIP) has been formed at the St. Lucie Plant to investigate methods of improving diesel engine reliablity. This is an integral part of our policy deployment and Ql team aspects of FPL's Quality Improvement Program, and, as such, represents on internal commitment under FPL's QIP activities. The team is now gathering and analyzing data from various sources, including the existing in-house files, the NRC, NPRDS Trending Data, INPO, EPRI, vendors and other utilities. Based upon the review of this data according to the established QIP process, a root cause analysis will be performed and a program enacted to solve the problems identified.

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QUESTION 6 NRC REQUEST:

Regarding the current three day testing frequency, is the licensee following 4.8.I.I.2.a or just 4.8. I. I.2.a.4?

FPL Response:

AII aplicable sections of specification 4.8. I.I.2.a are performed.

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ATTACHMENTI DOCUMENT LER 335-83-37 Special Report Special Report LER 389-86-6 Special Report LER 389 l I R JS4/043/9

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TECH/PSL Ltr. Bk. 8914 LORIOA POWER 8I LICH'T COMPANY NTERNFF ICE CORRESPONDENCE St. Lucie Plant TO P. L. Pace January 9, 1986 COPIES TO D. A. Sager FRoM C A Pell J. H. Barrow ST. LUCIE. UNIT 2 DIESEL GENERATOR R. R. Jennings SPFCIAL REPORT N. G. Roos L. W..Pearce On 19 December 1985, a speed changer motor on the PSL 2B Diesel Generator (D/G) failed. This failure is required to be covered by a "Special Report" within 30 days per Technical Specification 4.8.1.1.3 '(Electrical Power Systems Surveillance Requirements Reports) and Generic Letter 83-43 (Technical Specification changes due to new.LER rule).

You are requested to prepare and submit the report to the appropriate NRC office. ' description of the occurrence for use in preparation of the report is as follows:

On 19 December 1985, with Unit 2 in Mode 1 at normal full power, the 2B Diesel Geneiator (D/G) was placed out of service for periodic maintenance..

After the periodic maintenance on the air start system was completed, 'the 2B D/G was started at 1353 hours0.0157 days <br />0.376 hours <br />0.00224 weeks <br />5.148165e-4 months <br /> for an operable test run. The 2B D/G failed the test when it took 13.6 seconds to reach rated speed and voltage.

(Technical Specification 4.8.1.1.2 requires < 10 seconds). The 2B D/G was secured and Electrical Maintenance was contacted.

At 1603 hours0.0186 days <br />0.445 hours <br />0.00265 weeks <br />6.099415e-4 months <br /> on 19 December, the 2B D/G was restarted for troubleshooting.

(start time: 12.41 .seconds). It was discovered that only the 12 cylinder engine of the dual engine D/G was supplying power. Due to a failure of the governor's .speed changei motor, the 16 cylinder was not receiving any fuel oil. The speed changer motor was replaced. At 1440 hours0.0167 days <br />0.4 hours <br />0.00238 weeks <br />5.4792e-4 months <br />, 20 December, the 2B D/G was again declared operable having successfully completed the operable test run.

This is the second failure of the Unit 2 D/G's in the last 100 valid. tests.

The Unit remained at normal full power during the 27.5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> that the 2B D/G was out of service. The 2A D/G was fully operable during the 2B D/G failur'ei-=

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Page Two P. L. Pace ST. LUCIE UNIT 2 DIESEL GENERATOR SPECIAL REPORT Janua'ry 9, 198$

The current surveillance interval for St. Lucie Unit 2 is not more than 14 days in accordance .with Regulatory Position C.2.d of Reg. Guide 1.108.

C. A. Pell Technical Supervisor St. Lucie Plant CAP:SEM:kam

Distribution

Subject:

L-85-39 Januaiy 21, 1985 From: J.W. Williams, Jr.

NRC CORRESPOhOENCE ST. LUCIE UNlTS I 8 2 GO: J.W. Dickey PSL I: CA,. Pell J.H. Francis Vault Custodian DA,. Chancy C. Fierabend (NRC)

D.C. Poteralski JB: S.G. Brain PSL 2: C.T. Hamilton R.F. Englmeier E. Preast F.G. Flugger N.T. Weems F.P. Green G.E. Crowel1 (1SEG) ~

C.S. Kent W.B. Lee PTP 3/4: Document Control (K. York)

H.D. Mantz FA,. Panzani J.L. Parker J.E. Vessely OTHER: T.P. Gates (Combustion) SL I W.J. Harris (Combustion) SL 2 Harold Reis, Esq. (Newman)

M. Horrel1 (Ebasco)

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PSL/TECH Ltr. Bk. 81106 FLORIDA POWER E LIGHT COMPANY INTEROFFICE CORRESPONDENCE To; C. O. Woody LOCATION: St. Lucie Plant FROM: C. A. Pell OATEI August 6, 1986 sUsJEcT: LICENSEB BVENT REPORT 389-86-0ll COPIES TO: J. W. Dickey BOTH DIESEL GENERATORS SIMULTANEOUSLY "A. W. 'ailey OUT OF SBRVICE DUE TO ONE PBRSONNEL P ~ L'. Fincher Bi&OR AND ONE COMPONBNT FAILURE- N. G. Roos ST. LUCIB 2 H. N. Paduano S. A. Verducci D. H. West K. N. Harris R. V. Crenjak(NRC)

On July 9, 1986, both 'diesel generators were simultaneously out of service on St. Lucie Unit 2. One diesel generator was out of service due to personnel error and the other diesel generator was out of service due to a component failure.

In accordance with 10 CFR 50.73 (a)(2)(v) the attached LER is'enerated.

This report was reviewed by the Facility Review Group and is forwarded to you.

h C. A. Pell Technical Depart t Supervisor St. Lucie Plant CAPtMSDtkmt trQr

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