ML20211P231

Special Rept 97-02:on 970916,during Routine Monthly Surveillance Run,Jacket Water Leak Developed at Dresser Coupling Joint.Jacket Water Leak Repaired & EDG Sucessfully Retested & Returned to Operable Status

ML20211P231
Person / Time
Site:	Grand Gulf
Issue date:	10/16/1997
From:	Hughey W ENTERGY OPERATIONS, INC.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
GNRO-97-00100, GNRO-97-100, NUDOCS 9710200107
Download: ML20211P231 (8)

Text

.

O D y r: lions, Inc.

C7/ Pm1 Gitsm. M3 33150 Td (014374470 W.K.Hughey wa rw ou, October 16, 1997 i

U. S. Nuclear Regulatory Commission Mail Station P1-37 .

l Washington, D.C. 20555 Attention: Document Control Desk

)

Subject:

Grand Gulf Nuclear Station

, Docket No. 50-416 License No. NPF 29 Special Report 97-002 Valid Failure of Division 2 Emergency Diesel Generator Due to a Jacket Water Leak GNRO-97/00100 I Gentlemen:

On September 16,1997, operators performed a routine monthly surveillance run on the Division 2 Emergency Diesel Generator (EDG). Shortly before completion of the surveillance run, a jacket water leak developed at a Dresser Couplingjoint. The leak was estimated to be about half a gallon per minute, lt wasedeterphined that the half gallon per minute leak would prevent the EDG from compisting its design seven day run without operator action. As a result, the Jacket water leak was declared a valid failure of the Division 2 EDG.

The jacket water leak was repaired and the EDG was successfully retested and returned to operable status, in addition, a ifferent design will be installed on the Division 1 and 2 EDGs to address jacket water leaks.

1 -

h i\

9710200107 971016 -

PDR ADOCK 05000416 S PDR

GNRO-97/00000 Page 2 of 3 The valid failure of the Division 2 EDG was the second valid failure in the last 25 valid tests and the third valid failure in the last 100 valid tests. The EDG was

- unavailable for 15 hours1.736111e-4 days <br />0.00417 hours <br />2.480159e-5 weeks <br />5.7075e-6 months <br /> and 55 minutes. This failure is being reported pursuant to Grand Gulf Technical Requirements Manual sect'on 7.7.2.2 Yours truly, 7 .

WKH/JEO cc: Ms. J. L. Dixon Herrity, GGNS Senior Resident (w/a)

Mr. N. S. Reynolds (w/a)_

Mr. L. J. Smith (Wise Carter) (w/a)

Mr. H. L. Thomas (w/o)

Mr. J. W. Yelverton (w/a)

Mr. J. N. Donehew, Project Manager (w/2)

Office of Nuclear Reactor Regulation U. S. Nuclear Regulatory Commission Mall Stop 13H3 Washington, D. C. 20555 Mr. E. W. Merschoff (w/a)

Regional Administrator U. S. Nuclear Regulatory Commission Region IV 611 Ryan Plaza Drive, Suite 400 Arlington, TX 76011 .

______m_.________ _ _ _ . . - - . . .

t GNhtO-97/00000

• Page 3 of 3 bec: Mr. R. E. Brinkman (w/a)

Mr. C. W. Elissesser (wla)

Mr. D. R. Franklin (w/a)

Ms. C. W. Gunn (wla)/(2)

Mr. J. E Owens (w/a)

Mr. C. H. Quick (w/a)

Mr. C. D. Stafford (w/a)

Mr. G. D. Swords (w/a)

Mr. T. H. Thurmon (w/a)

Required Reading Coordinator (w/a)

File (LCTS/RPTS) (w/a)

File (NS&RA)(w/a)

File (Central)(w/a)(8 )

INPO Records Center (wla) 700 Galleria Parkway Atlanta, Georgia 30339-5957 s

r i

CONCURRENCE REVIEW FORM SECTION 1 RESPONSE DUE: 10/16/97 ONRO 97/00100 (NRC Required)

SU11 JECT:

Valid Failure of Emergency Diesel 12 Due to a Jacket Water Leak gst James Owens Y 10/14/97 Drew Bottemiller 10/14/97 NRC Document Preparer /Date Responsible Sect., Supt./Date Commitment Concurrence SECTION 11 LOCATIONS COMMITMENT PRIMARYlSECONDARY DUE DATE Page 1 Replace Dresser Couphngs using new design Maintenance Paragraph 2 h-30-78 This letter contains commitments requiring procedural implementation YES ( ) NO (X)

UFSAR Potential Impact Classification SECTION 111 UFSAR impact: No X Yes IfYes:

A) List UFSAR sections / tables / figures affected and describe nature of UFSAR impact.

B) UFSAR revision affected: Current Future C) Additional comments:

\

d 1

. l l

SECTION IV l 1

Concurrence Review- Required Y N

() (X)

VP, Operations GGNS/Date

() (X)

General Manager, Plant Operations /Date

() (X)

Director, Design Engineering /Date (X) (-) 8/3 /

Director, Nuclear Safety &

Regylat Affairs /Date (X) () i J Idedager, Performance &

l System Engineering /Date

@- IXi Qk- - =[

06 Manager, Maintenance /Date r/PAVfl0-t'l"ly l

l l

l l

- _ ~ _ . - - , .- . _ . . - . - _ - . , . . .. . _ _ , _ . _ - . . . . _ _ _ _

t

. )

VERIFICATION / CERTIFICATION FORM A. Description SR 97-002:

Valid Failure on Emergency Diesel Generator 12 Due to a Jacket Water Leak B. Verification The undersigned acknowledges that the technical content of the information described in section A above has been verified to be accurate and complete by review of the subject information and supporting material as listed below:

(A) CR 1997-085100 & 01 (B) - CR 1997 0899 (C) Work Order #s 191757,191701, and 194338 (D) GI Al 'l7[O/f 2 o.

Signature 18 /d84V / October 7,1997

/ Submittal Originator / Date Peer Concurrence Review rformed by: Date: October ,1997 bb' .. /d"IN7 b[f J./s

/r/

Signature / O/erations Signature / P&SE

_m k \O-N T Mnature / NS&RA C. Certification Date: October .1997 The undersigned certifies that a verification review has been performed to confirm that the technical content of the information :ontained in this submittal is accurate and complete.

Signature ' 0'N M

1. # 3 Subtrittal Originator

SURVEILLANCE PROCEDURE

, GRA)ND GULr NUCLEAR PfATION b ' 06-OP-1P15-v-0011 R;visign 100 Attachment V Page 1 of 2  %

Page RTYPE B6.61 XRef DIESEL GENERATOR START IDG DIESEL 100t SEEET sa..n mELaw.u For All Diesel Generator Failures 5.5.1 Diesel Generator No. : D b I 2-5.5.2 Sequential start No.: 80 7 5.5.3 Type of failure (valid, invalid): Ya fib 5.5.4 Failures in last 25 valid tests: 1 l Failures in last 100 valid tests: 3 5.5.5 Cause cf fai,}ure: 3 a tkt 4 WoheY' leak cd- (Irr CS 6 C Coup lina A 4- 4e p 0 + P n a r n e. nn Nec4h 2. 5 /nc h li ne no, n n in C ombkwo%

& c b/ v. (he M x. A ne1\ % oce mina k h J 5.5.6 measures t Indke F Wh IMk rePdWd w,% >

CorrebtivI aio 433A. ra dak n so1 Rtm *k oc,1 J- ses p e r4e rm, a +o co rrurm fcA K re Daired.

(LL n # t12 - 106 5

• Ma ct'.9 -IL 'ti / cM OT E,+e p ; 9-l6-92 / 20 4 5 w ets w ri He n e Imk 5.0.7 ~fe dof Length eewmewt-time dieselDN generator G D/ C T N o r +e 6 Tuke+-wW'J6 unavailable: I awd. 9 E rn e'n.

5.5.8 Current surveillance test intervals blb At>\

5.5.9 Test interval in conformance with Tech Spec 3.8.1-1: YE 6 l 5.5.10 Data Sheet III attached for each failure during troubleshooting: N/4 Notify'the surveillance Coordinator if the AfM /

periodicity needs to be changed. Who Notified Date If failure is >/= 7 in last 100 valid tests, coroplete 5.5.11 through 5.5.14:

5.5.11 Corrective measures, taken or planned, to increase reliability of the diesel generators d/k H i \T ECh_PU D\ P ROC ED\ 06 \0 P 7 5V11. 7.5

e SURVEILIANCE PROCEDURE (MAND GULF NUCLEAR STATION a' '

06-OP-1P15-V-0011 R:visien 100 Attachment V Page 2 of 2 Page RTYPE B6.61 XRef DIESEL m m ahTCR START LOG DIESEL 1016 SMEET sAnars smaA1=u 5.5.12 Assessment of existing reliability of electric power t E F c7uipment:

5.5.13 Basis for continued plant operation, if planned: A.I[k 5.5.14 Data sheets attached documenting last 100 valid tests: N M.

5.5.15 Completed by (name/date): (b '

. / 9"/[' 97 o

(

Ms\ TECH _ PUB \PROCED\06\0P75V11.A5

- _ _ _ _ _ _ _ _ _ _ _ _ _ _ _