HL-1667, Special Rept 1-91-004:on 910502 & 06,listed battery-powered Emergency Lighting Units Inoperable for More than 72 H. Affected battery-powered Emergency Lighting Units Verified Operable by Performing Monthly Insp

Special Rept 1-91-004:on 910502 & 06,listed battery-powered Emergency Lighting Units Inoperable for More than 72 H. Affected battery-powered Emergency Lighting Units Verified Operable by Performing Monthly Insp

ML20081F474
Person / Time
Site:	Hatch
Issue date:	06/06/1991
From:	Beckham J GEORGIA POWER CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
001726, 1-91-004, 1-91-4, 1726, HL-1667, NUDOCS 9106100342
Download: ML20081F474 (6)

Text

. .

i

. a n ,i. , ,

l ,

It

..n.'t o l- ,a*<.[ t i l ', i'>eiy n . .

n ,,.,

' , >~;

m

1 mu,u Georgia Power

, - , i. s-I HL-1667 901726 June 6, 1991 U.S. Nuclear RegulLtory Commission AITN: Document Control Desk Washington, D.C. 20555

, PLANT HATCH - UNITS 1, 2 NRC 00CKETS 50-321, 50-366 l

OPERATING LICENSES DPR-57, NPf-5 SPECIAL REPO!' 1-91-004 BATTERY-POWERED E JRGENCY LIGHTING UNITS IN0PERABLL FOR A PERIOD GREATER THAN 72 HOURh l

Gnntlemen:

t in cordance with Plant Hatch Unit I and Unit 2 Technical Specifications sectic 1.9.2 and Appendix B of the fire Hazards Analysis, Georgia Power Compan; s submitt'ing the enclosed Special Re) ort concerning battery-powered em?rgens lighting units which were inoperaale for a period greater than 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />.

Sincerely, q a- dA

[/J. T. Beckham, Jr.

OCV/cr Enclorure: Specihl Report le91-004 cc; Georaia Power CLTp m Mr. H. L. Sumner, General Manager - Nuclear Plant Mr. J. D. Heidi, Manager Engineering and Licensing - Hatch NORMS U.S. Nuclear Rggulatory Commission. Washinaton. D. L l Mr. K. Jabbour, Licensing Project Manager - Hatch l U.S. Nuclear Regulatory Commtssion, keaion 11 Mr. S. D Ebneter, Regional Administrator Mr. L. D. Wert, Senior Resident Inspector - Hatch fes"SM!E Mnyk [9 i

ENCLOSURE PLANT HATCH - UNIT 1 AND UNIT 2 NRC DOCKET 50-321 AND 50-366 OPERATING LICENSE DPR-57 AND NPT-5 SPECIAL REPORT l-91-004 BATTEP.Y POWERED EMERGENCY LIGHTING UNITS INOPERABLE FOR A PERIOD G8 EATER THAN 72 HOURS A. REQUIREMENT FOR REPORT This report is required by Unit I and Unit 2 Technical Spe':ifications section 6.9.2. which states that Special Reports for fire protection equipment shell be submitted as required by the fire Hazards Analysis (FHA) and its Appendix B requirements.

Appendix 0 of the FHA, section 1.9.1, states that emergency lighting equi > ment must be operable at all times. The ACTION statement says that in tie event a battery powered emergency lighting unit is inoperable for greater than 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />, a Saecial Report must be submitted to the Nuclear Regulatory Commission titlin 30 days. In the event described in this report, 11 battery powered emergency lighting units were inoperable for greater than 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />.

B. UNIT STATUS AT lime Of EVENT On 5/2/91 Unit I was in the run mode at a power level of 2312 CHWT (94 9% of rated thermal power), and Unit 2 was in a refueling outage with the reactor vessel flooded and the core partially reloaded.

C. DESCRIPTION Of EVENT On 5/2/91, performance of surveillance procedure 42SV-fPX-003-0S,

'EMERGENr.Y LIGHTING SURVEILLANCE,* was begun. This involved an inspection of physical condition, indicating lamps, electrolyte level, etc., as well as an 8-hour battery discharge test which is performed on one-third of the lighting units every 120 days, such that all the lights I are tested at least once oer year. The inspection is required by the l

fire Hazards Analysis, Appendix B, section 2.9.1.a. The 8-hour battery discharge test is required by the fire Hazards Analysis, Appendix D, section 2.9.1.b.

Several -discrepancies were found during the performance of the surveillance. Nonconformances and corrective actions are tabulated below. All deficient conditions were discovered by the annual 8-hour b6ttery discharge test unless otherwise noted.

HL-1726 E-1

ENCLOSURE (Continued)

PLANT HATCH - UNIT 1 AND UNIT 2 NRC DOCKET 50-321 AND 50-366 OPERATING LICENSE DPR-57 AND NPF-5

, SPECIAL REPORT l-91-004

BATTERY POWERED EMERGENCY LIGHTING UNITS INOPERABLE FOR.A PERIOD GREATER THAN 72 HOURS l

l UNIT I EMERGENCY LIGHilNG j LIGHT AREA DATE DATED DEFICIENT CORRECTIVE WHER SERVED FAILED RESTORED CQNDITION ACTION 1R42-E093 Turbine Butiding, 5/6/91 5/11/91 Failed 8-hour Replaced battery i 130 ft, elevation, battery discharge per East cableway area, test. MWO l-91-1953. ,

1R42-E005 Control Building, 5/6/91 5/11/91 failed 8-hour Replaced battery '

130 ft. elevation. battery _ discharge per Health Physics test. MWO l-91-1953. i office entrance '

area.

IR42-E021 Reactor Building, 5/6/91 5/11/91 Failed 8-hour Replaced entire 130 ft, elevation, battery discharge lighting unit per Stairway access, test. MWO l-91-1953. -

! 1R42-E052 Reactor Building, 5/6/91 5/10/91 Failed 8-hour Replaced battery _

, below 130 ft. battery discharge por l

. elevation, test. MWO l-91-1954. ,

i Suppression Pool ,

area. ,

'IR42-E031- Reactor Building, 5/6/91 $/10/91 Failed 8-hour Replaced battery 130 ft. elevation, battery discharge per '

Northeast stairway test. MWO l-91-1954.

area. ,

IR42-E073 Reactor Building, 5/6/91 5/10/91 Failed 8-hour Replaced battery l 130 ft. elevation.- battery discharge per Area lighting for test. MWO l-91-1954.

MCC 1R24-50ll.

-lR42-E129 Control Building. 5/6/91 5/12/91. Failed 8-hour Replaced remote '

147 ft. elevation, battery discharge lamp heads, t Area lighting for test, battery and-l doorway _near cable charging unit l spreading room and per l interior lighting MWO l-91-1955.

for cardox tank-room.

t

_HL-1726 E-2

-. - . - . - _ - . . - . - . _ - . _ - . - - , . . - - . - . - - , - - - . - . a .-. - _, ,.

- . . . _ - - . ._---. - __~ - _ _.-.-.

A d

Ei; CLOSURE (Continued)

PLANT HA1CH - UNIT 1 AND UNIT 2 NRC DOCKET 50-321 AND 50-366 OPERATING LICENSE DPR-57 AND NPf-5 SPECIAL REPORT 1-91-004 BATTERY POWERED EMERGENCY LIGHTING UNITS JRQEfilABLE FOR A PER101,qREATER THAN 72 HOURS

~~

UNil 2 EMERGENCY LIGHTING LIGH1 AREA DATE DATED DEFICIENT CORREC11VE NUMBER SERVFD FAILED RESTORED CONDITION ACTION 2R42-E033 Reactor Building, 5/2/91 5/6/91 Failed 8-hour Raplaced battery 130 ft, elevation. battery discharge and fuse for Northwest stairway test, charging area. indicator lights per MWO 2-91-2072.

2R42-E078 Turbine Building, 5/2/91 5/6/91 Bad charging Replaced 130 ft. elevation, unit transformer, transformer per East cableway Discovered by MWO 2-91-2069.

area. monthly surveillance.

2R42-E083 Reactor Butiding, 5/6/91 5/11/91 Over charged Replaced battery below 130 ft, battery and and charging elevation, evaporated unit per Suppression Pool all electrolyte. MWO 2-91-2189.

area. Discovered by monthly surveillance.

2R42-E001 Reactor Building, 5/6/91 5/11/91 Failed 8-hour Replaced battery below 130 ft. battery discharge per elevation, test. MWO 2-91-2197.

Suppression Pool area.

HL-1726 E-3 l

M -_

i ENCLOSURE (Continuod)

PLANT HATCH - UNIT 1 AND UNIT 2 NRC DOCKET 50-321 AND 50-306 OPERATING LICENSE DPR-57 AND NPT-5 SPECIAL REPORT 1-91-004 BATTERY POWERLD EMERGENCY LIGHTING UNITS INOPERABLE FOR A PERIOD GREATER _ItWLlZ_HWEi D. CAUSE Of EVENT The causes of the failures in the various battery powered emergency lighting units are tabulated above.

Efforts were made to repair the lights in a timely manner and the majority of the failed units were repaired within the 72-hour period.

Over 400 lighting units were inspected and tested, more than 80 of which had their annual 8-hour discharge test performed. 28 units failed some part of the surveillance. Repairs for the failed units involved replacing batteries, lamp heads, charging units and, in some cases, the entire lighting unit. Following the repair, the monthly inspection and 8-hour discharge tests were performed again.

Therefore, due to the large number of tests performed and the extent of the repairs, the 11 units discussed in this report were not restored to operable status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />.

E. ANALYSIS OF EVENT The battery powered emergency lighting units are designed to provide illumination for certain pieces of equipment in the event of a fire concurrent with a loss of site power (LOSP). During an LOSP the automatic load shedding function of the emergency diesti generators will disconnect power to various areas of normal plant lighting, thereby triggering the emergency lights. The tabulation above shows the areas the battery powered emergency lighting units were intended to illuminate.

In the event that the normal building lights in these areas are extinguished, plant operators can use flashlights for any required emergency operations in the areas listed. Procedure 34G0-0PS-030-1S, "INSIDE DAILY ROUNDS," requires plant operators to carry flashlights with them during their daily rounds. Also, flashlights are available continually in the Maintenance Tool Storage Area for use during emergencies.

HL-1726 E-4

. l i

ENCLOSURE (Continued)

PLANT HATCH - UNil 1 AND UNIT 2 NRC DOCKET 50-321 AND 50-366 OPERATING LICENSE DPR-57 AND NPF-5 SPECIAL REPORT l-91-004 BATTERY POWERED EMERGENCY LIGHTING UNITS IN0PERABLE FOR A PERIOD GREATER THAN 72 HOURS Of the 11 failed units listed in the table, only IR42-E073 provides lighting for a component, namely MCC 1R24-S0ll and CRD hydraulic control units. In addition to flashlights, emergency lights IR42-E100 and IR42-E024 are also available to aid in the lighting of IR24-50ll and the CRD units. The rest of the lights listed in the table provide lighting for access only, folinwing completion of corrective actions on the failed lights, the surveillance procedure was repeated, including the 8-hour battery discharge test. All the affected lights passed the test after completion of maintenance activities.

Based on the above analysis, it is concluded that this event had no adverse impact on nuclear safety,

f. CORRECTIVE ACTIONS The corrective action for each inoperable light is listed in the table.

The affected battery powered emergency lighting units were verified operable by performing the monthly inspection and 8-hour battery discharge test in accordance with the requirements of the FHA, Appendix B, sections 2.9.1.a and 2.9.1.b.

HL-1726 E-5 ,

. - - . - - . . . - .. . - . - .- . - . . - . - - -