ML20097D563

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Annual Operating Rept for GGNS Unit 1 for 1995
ML20097D563
Person / Time
Site: Grand Gulf Entergy icon.png
Issue date: 12/31/1995
From: Hutchinson C
ENTERGY OPERATIONS, INC.
To:
NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
GNRO-96-00010, GNRO-96-10, NUDOCS 9602130077
Download: ML20097D563 (9)
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Text

.

O Entergy Operations,Inc.

. . , i g; .g

> (-( 1 3 C. R. Hutchinson February 7, 1996 '.

U.S. Nuclear Regulatory Commission Mail Station P1-137 Washbgton, D.C. 20555 Attention: Document Control Desk

SUBJECT:

Grand Gulf Nuclear Station Unit 1 Docket No. 50-416 License No. NPF-29 1995 Annual Operating Report GNRO-96/00010 Gentlemen:

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

Unit 1 Annual Operating Report for 1995. This report is 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 1995,
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 ,

A H MG attachments cc: (See Next Page)

,0 0 '

90050 (k 9602130077 951231 PDR ADOCK 05000416 R PDR

February 7,1996 GNRO-96/00010 '

Page 2 of 3 cc: Mr. D. C. Hintz (w/a)

Mr. R. B. McGehee (w/a)

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

Mr. J. E. Tedrow (w/a)

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

Mr. Leonard J. Callan (wla)

Regional Administrator I

U.S. Nuclear Regulatory Commission Region IV 611 Ryan Plaza Drive Suite 400 Arlington, TX 76011 Mr. P. W. O'Connor, Project Manager i Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission -

Mail Stop 13H3 Washington, D.C. 20555 l

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l Attachment I to GNRO-96/00010 Page1of1

SUMMARY

OF OPERATING EXPERIENCE 1995 i The following is a summary of Grand Gulf Nuclear Station (GGNS) Unit 1 operating  !

l experience for the 1995 calendar year. During 1995, the reactor was critical for 7,039.9  ;

hours with the generator on line for 6,832.0 hours0 days <br />0 hours <br />0 weeks <br />0 months <br />.

On 3/16/95, a reactor scram occurred caused by a pinched-wire ground fault in RCIC minimum flow valve E51F019 and intermittent ground of backup scram valve C11F110A which energized during Division il surveillance (half scram existing). Immediate corrective l actions included reworking the ground on the RCIC valve and replacing the backup scram valve solenoid. Also the conduit going to the solenoid was sealed to prevent moisture i intrusion. (JC) [LER 95-004] - Curation hours - 37.3 l

l On 4/15/95, the reactor was shut down for Refueling Outage # 7. This outage was extended due to generator stator leak repairs. Duration hours - 1377.1 1

On 6/11/95, the reactor was manually scrammed to replace Reactor Recirculation Pump "A"

  1. 1 Seal. Duration time - 68.7 hours8.101852e-5 days <br />0.00194 hours <br />1.157407e-5 weeks <br />2.6635e-6 months <br />. l l

On 6/14/95, the reactor was manually scrammed to replace Reactor Recirculation Pump "A" '

  1. 1 Seal due to second failure. Duration hours - 140.7 1

On 6/20/95, the reactor was taken off grid for L 'rbine overspeed test. Duration time - 6.8 l hours l A reactor scram occurred on 7/3/95. The scram was caused by a trip of Main Turbine and l Reactor Feedwater Pumps resulting from an invalid reactor-water-level-high trip signal i during surveillance of channel "B" (JC) [LER 95-007) - Duration hours - 37.7 On 7/12/95, a reactor scram was caused by a Main Turbine trip on low condenser vacuum resulting from failure of an HP condenser expansion joint. (SG) (LER 95-008) - Duration l hours 139.9 1 1  ;

i On 7/30/95, a reactor scram occurred due to failura of a current transformer on 500 kV generator output breaker J5228. (JC) [LER 95-010) - Duration hours 68.4 1

On 9/17/95, the reactor scrammed at low reactor water level caused by failure of the pump discharge check valve to close following a trip of Reactor Feed Pump Turbine "B" resulting from malfunction of pressure regulating valve PRV-4 in lube oil system. Both "B" and "A" discharge check valves were repaired to prevent a similar occurrence. (SJ) [LER 95-011)-

, Duration hours 51.5

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.' Attachment ill to GNRO-96/00010 l Page 1 of 4 I GGNS UNIT 1 ANNUAL REPORT MAN-REM EXPOSURE - 1995 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.

f Attachment III Grand Gulf Euclear Station Page 2 of 4 Date: 11-JAM-1996 08:37 P.O. Bon 756 Port Gibson, MS 39150 1

LICENSE
NPF-2
Regulatory Guide 1.16 Information End of Year Report 1995
Number of Personnel 1 > 100 mrem Total man-rem
  • Dork and Job Function Station Utility Contractor Station Utility Contractor ROUTINE OPERATIONS AND SURVEILLANCE I MAINTENANCE AND CONSTRUCTION 4 0 2 1.090 0.003 0.377
OPERATIONS 1 0 0 1.183 0.000 0.003 HEALTH PHYSICS 28 7 27 13.315 2.209 10.278 i

SUPERVISORY 1 0 0 0.275 0.000 0.015 ENGINEERING 0 0 0 0.172 0.000 0.000 ROUTINE PLANT MAINTENANCE i MAINTENANCE AND CONSTRUCTION 157 25 417 70.723 8.093 153.983 OPERATIONS 58 0 11 25.683 0.002 7.547 HEALTH PHYSICS 28 1 8 9.666 0.428 2.793

SUPERVISORY 11 1 17 3.338 0.386 4.177 ENGINEERING 16 0 2 6.192 0.011 0.988 l INSERVICE INSPECTION MAINTENANCE AND CONSTRUCTION O O 64 0.084 0.000 24.246

, OPERATIONS O O O 0.000 0.000 0.026 HEALTH PHYSICS O O O 0.018 0.003 0.004 i SUPERVISORY 3 0 31 1.094 C.026 9.393 ENGINEERING 2 0 0 0.371 0.001 0.055 SPECIAL PLANT MAINTENANCE MAINTENANCE AND CONSTRUCTION O O O O.000 0.000 0.000 r OPERATIONS 0 0 0 0.000 0.000 0.000

} HEALTH PHYSICS 0 0 0 0.000 0.000 0.000 SUPERVISORY 0 0 0 0.000 0.000 0.000 ENGINEERING O O O 0.000 0.000 0.000 i

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Attachment III Regulatory Guide 1.16 Information End of Year Report 1995 Number of Personnel

> 100 mrem Total man-rem

  • t5ork and Job Function Station Utility Contractor Station Utility Contractor t3ASTE PROCESSING 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 REFUELING MAINTENANCE AND CONSTRUCTION O O 38 0.118 0.000 11.142 OPERATIONS 1 0 2 0.453 0.000 0.534 HEALTH PHYSICS 0 0 0 0.022 0.000 0.070 SUPERVISORY O O 2 0.347 0.007 0.401 ENGINEERING 0 0 0 0.416 0.000 0.000 Totals MAINTENANCE AND CONSTRUCTION 161 25 521 72.015 8.096 189.748 OPERATIONS 60 0 13 27.319 0.002 8.110 HEALTH PHYSICS 56 8 35 23.021 2.640 13.145 SUPERVISORY 15 1 50 5.054 0.419 13.986 ENGINEERING 18 0 2 7.151 0.012 1.043 Grand Totals 310 34 621 134.560 11.169 226.032 o The total radiation exposure of the above personnel constitutes 100% of the site's exposure for the year.
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  • Attachment ll1 to GNRO-96/00010 Page 4 of 4 l

SPECIAL MAINTENANCE ACTIVITIES l-There were no special maintenance activities in 1995 that resulted in exposure greater than 100 mrem.

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o Attachment IV to GNRO-96/00010 l Page1ofI l

l FAILED FUEL INDICATIONS / INSPECTIONS - 1995 Failed fuel assessments performed during Cycle 8 indicate a single, medium-sized l fuel failure exists in the Grand Gulf core. '

The failure occurred on 9/9/95. Fuel Reliability Index peaked at 3061 Ci/sec and leveled at about 1000 Ci/sec.

l The failure appears to be in a second cycle bundle in core cell location 32-27. This cell contains two second cycle bundles. Current plans are to discharge both of l

these bundles during RFO8 (October 1996).

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