ML20080P795

Annual Operating Rept for 1994

ML20080P795
Person / Time
Site:	Grand Gulf
Issue date:	12/31/1994
From:	Hutchinson C ENTERGY OPERATIONS, INC.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
GNRO-95-00025, GNRO-95-25, NUDOCS 9503080135
Download: ML20080P795 (9)

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?# ENTERGY YJ 55 I**" "'"" ' ,

• Fbrt Gibson, MS 39150 1

, Tel 601437 2800 C. R. Hutchinson February 28, 1995 gg' , sm ciano ca m U.S. Nuclear Regulatory Commission -

Mail Station P1-137 Washington, D.C. 20555 Attention: Document Control Desk

SUBJECT:

Grand Gulf Nuclear Station Unit 1 Docket No. 50-416 License No. NPF-29 1994 Annual Operating Report

' GNRO-95/00025 Gentlemen:

Entergy Operations, Inc. is transmitting the Grand Gulf Nuclear Station (GGNS)

Unit 1 Annual Operating Report for 1994. This report b in accordance with the reporting program described in Regulatory Guide 1.16, Revision 4, Part C.1.b as modified by the NRC letter to GGNS dated May 25,1987 (MAEC-87/0131).

Provided as attachments are:

1. A narrative summary of operating experience during the year 1994,

2. Main Steam Line Safety Relief Valve challenges,

3. A tabulated annual report of personnel exposure greater than 100 mrem /yr, and

4. A summary of failed fuelindications/ inspections.

Yours truly, ,

, a CRH/TMC attachments cc: (See Next Page) n7n3nn 95o3090135 941231 PDR

• I ADOCK 05000416 00

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February'28, 1995 G'NRO-95/00025

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cc

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

Mr. R. B. McGehee (w/a) j Mr. N. S. Reynolds (w/a) 2 Mr. J. E. Tedrow (w/a)

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

Mr. Stewart D. Ebneter (w/a) l' Regional Administrator U.S. Nuclear Regulatory Commission l Region 11 101 Marietta St., N.W., Suite 2900 ,

t Atlanta, Georgia 30323 l

Mr. P. W. O'Connor, Project Manager 4

Office of Nuclear Reactor Regulation i U.S. Nuclear Regulatory Commission

Mail Stop 13H3 3 j Washington, D.C. 20555 n

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.- Attachment I to GNRO-95/00025 l PageiofI l

SUMMARY

OF OPERATING EXPERIENCE 1994 l .

The following is a summary of Grand Gulf Nuclear Station (GGNS) Unit 1 operating experience for the 1994 calendar year. During 1994, the reactor was critical for 8,464.5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> with the generator on line for 8,286.5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br />. ,

1 On 3/27/94, the reactor was shutdown due to maintenance on slow control rod (ROD) times.

[LER-94-004] Solenoid pilot valve head assemblies were cleaned and new top head assemblies using Teflon tape as a thread sealant were installed. Duration hours - 192 On 5/28/94, Power was reduced to approximately 80% for performing control rod sequence exchange. It remained at low power for performing control rod scram time testing. Duration of low power was 162.5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br />.

On 7/16/94, power was reduced to approximately 70% for control rod sequence exchange. l Control rod scram time testing was performed during the low power operation. Duration time for low power was 138 hours0.0016 days <br />0.0383 hours <br />2.281746e-4 weeks <br />5.2509e-5 months <br />.

On 8/24/94, the reactor was manually shut down for high vibration of main generator bearing

1. 11 caused by cooling water leaking into rotor cavity through cracked welding. The reactor remained shut down for work on main generator cooling water pipes to obtain generator balance. Duration hours - 220.3 On 9/11/94, reactor power was reduced to approximately 10% to take main generator off line for repairing ground-fault detection wiring damaged by fallen lighting fixture.

A reactor scram occurred on 11/1/94. The scram was caused by ground of backup scram valve C11F110A which energized during Division I surveillance (JC) [94-011). Duration hours - 45.7 l

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Attachment ll to GNRO-95/00025 PageIof1 j l

l MAIN STEAM SAFETY RELIEF VALVE CHALLENGES 1994 I l

There were no main steam line safety relief valve challenges occurring in 1994.  !

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Attachment lll to GNRO-95/00025 Page 1 of 4 l ,

GGNS UNIT 1 ANNUAL REPORT MAN-REM EXPOSURE - 1994 This section contains a tabulation of the number of station, utility and other personnel receiving exposures greater than 100 mrem / year and their associated man-rem exposure according to work and job function. Also included is a tabulation of the number of personnel by exposure range.

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Attachment'III '

Page-2 of 4 t Grrrd Gulf Nuclcar Station Dste: 22-FEB-1995 11:06'

- P.O. Box 756 Port Gibson, MS 39150 , y t

LICENSE: NPF-2 .

Regulatory Guide 1.16 Information -

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End of Year Report 1994

• Number of Personnel

> 100 mrem Total man-rem

• Nork and Job Function Station Utility Contractor Station Utility. C' mtractor ROUTINE OPERATIONS AND SURVEILLANCE

-NAINTENANCE AND CONSTRUCTION 46 0 6 10.212 0.000 1.875 OPERATIONS- 44 0 3 11.085 0.008 1.778 HEALTH PHYSICS 21 0 2 6.978 0.002 0.543 SUPERVISORY 1 0 0' O.526 0.003 0.198 ENGINEERING 2 0 0 1.317 0.000 0.075 ,

ROUTINE PLANT NAINTENANCE NAINTENANCE AND CONSTRUCTION 58 0 16 14.248 0.000 8.022 OPERATIONS 2 0 1 0.648 0.000 1.402 HEALTH PHYSICS 9 0 1 2.565 0.000 0.536 SUPERVISORY 0 0 0 0.280 0.001 0.018 ENGINEERING 1 0 4 0.346 0.000 0.818 INSERVICE INSPECTION NAINTENANCE AND CONSTRUCTION 0 0 0' O.000 0.000 0.000

+

OPERATIONS O O O 0.000 0.000 0.000 NEAL'111 PHYSICS 0 0 0 0.000 0.000 0.000 SUPERVISORY 0

• 0 0 0.000 0.000 0.000 ENGINEERING 0 O O 0.000 0.000 0.000 SPECIAL PLABfr NAINTENANCE NAINTENANCE AND CONSTRUCTION . 0 0 0 0.000 0.000 0.000 OPERATIONS 0 0 0 0.000 0.000 0.000 HEALTH PHYSICS 0 -0 0 0.000 0.000 0.000 CUPERVISORY 0 0 0 0.000 0.000 0.000 ENGINEERING- 0 0 0 0.000 0.000 0.000 l

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Attachment III Page 3 of 4 Regulstory Cuida 1.16 Information End of Year. Report 1994 Number of Personnel *

> 100 mrem Total man-rem

• Work and Job Function Station Utility Contractor Station Utility Contractor' .

WASTE PROCESSING .

MAINTENANCE AND CONSTRUCTION O O O 0.000 0.000 0.000 OPERATIONS 0 0 0 0.000 0.000 0.000  ;

HEALTH PHYSICS O O O O.000 0.000 0.000 l SUPERVISORY 0 0 0 0.000 0.000 0.000 ENGINEERING O O O 0.000 0.000 0.000 REFUELING MAINTENANCE AND CONSTRUCTION O O O 0.000 0.000 0.000 OPERATIONS O O O 0.000 0.000 0.000 HEALTH PHYSICS O O O 0.000 0.000 0.000 SUPERVISORY 0 0 0 0.000 0.000 0.000 ENGINEERING 0 0 0 0.000 0.000 0.000 Totals MAINTENANCE AND CONSTRUCTION 104 0 22 24.460 0.000 9.897 OPERATIONS 46 0 4 11.733 0.008 3.180 HEALTH PHYSICS 30 0 3 9.543 0.002 1.079 SUPERVISORY 1 0 0 0.806 0.004 0.216 ENGINEERING 3 0 4 1.663 0.000 0.893 Crund Totals 184 0 33 48.205 0.014 15.265

• The total radiation exposure of the above personnel constitutes 100% of the site's exposure for the year.

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Attachment lll to GNRO-95/00025 Page 4 of 4 SPECIAL MAINTENANCE ACTIVITIES There were no special maintenance activities in 1994 that resulted in exposure greater than 100 mrem.

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. Attachment IV to GNRO-95/00025

. Page1of1 FAILED FUEL INDICATIONSilNSPECTIONS - 1994 Failed fuel assessments performed during Cycle 7 indicate there are no fuel failures presently in the Grand Gulf core.

During September, five spent bundles were examined for performance data gathering. In addition, bundles AND-043 and XNC-703 were inspected for a failure.

The inspection revealed a small hole (0.04") in a fuel pin of bundle AND-043.

The examination revealed the failure resulted from debris fretting. The debris was trapped at 140.5 inches above the lowe end cap in the seventh spacer grid. Flow induced mechanical vibration of the trapped debris caused the primary breach of the cladding. The hole in the cladding does not correspond to the spacer spring or dimple contact areas. Examination of the spacer grid showed no debris present.

Reference - Siemens Power Corporation Report. Inspection of SPC 8x8 and 9x9 Fuel Assemblies at Grand Gulf, September 1994, EMF-94-195(P). -

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