HL-3054, Special Rept 2-92-005:on 921102,battery-powered Emergency Lighting Unit Inoperable for More than 72 H.Caused by Failure of Lighting Unit to Pass Regularly Scheduled Maint. Lighting Unit Replaced & Verified Operable

Special Rept 2-92-005:on 921102,battery-powered Emergency Lighting Unit Inoperable for More than 72 H.Caused by Failure of Lighting Unit to Pass Regularly Scheduled Maint. Lighting Unit Replaced & Verified Operable

ML20128D301
Person / Time
Site:	Hatch
Issue date:	12/02/1992
From:	Beckham J GEORGIA POWER CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
2-92-005, 2-92-5, HL-3054, NUDOCS 9212070218
Download: ML20128D301 (4)

Text

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• Georg!: Power Cortgeny 6 40 iny:rress Center Parkw:y Post Offra Dos 129s

, Banervpcm, /dattarra 3s201 Tokephone 205 877 7279 m

J. T. Beckham, Jr.

Vu PrerMont - Nsclear Gt orda Powt'r Hatch Propct  !% n o"*o ve !m w iHn HL-3054 004383 Decernher 2,1992 U.S. Nuclear Regulatory Commission AliN: Document Control Desk Washington, D.C. 20555 PLANT HATCH - UNIT 2 NRC DOCKET 50-366 OPERATING LICENSE NPT-5 SPECIAL REPORT 2-92-005 BATTERY POWERED EMERGENCY LIGHTING UNIT JRQPERABLE FOR A PERIOD GREATER TliAN 72 HMfLS Gentlemen:

In accordance with the requirements of the Unit 2 Technical Specification and fire Hazards Analysis, Georgia Power Company is submitting the enclosed Special Report concerning an event where a battery powered lighting unit was inoperable 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,

'W '

J. T. Beckham, Jr.

JKB/cr Enclosure cc: {Le9raia Power Company Mr. H. L. Sumner, General Manager - Nuclear Plant NORMS 1LS. Nuclear Reaulatory Commission. Washinaton. D. L Mr. K. Jabbour, Licensing Project Manager - Hatch U.S. Nuch ar Regulatory Commission. Reaion 11 Mr. S. D. Ebneter, Regional Administrator Mr. L. D. Wert, Senior Resident inspector - Hatch 07n003 /

9212070218 921202 t \

PDR ADOCK0500g6

ENCLOSURE PLANT HATCH - UNIT 2 NRC DOCKET 50-366 OPERATING LICENSE NPF-5 SPEC 1. REPORT 2-92-005 BATTERY POWERED EMERGENCY LIGHTING UNIT IMQEERABLE FOR A PERIOD GREATER THAN 72 HOURS, 1

A. REQUIREMENT FOR REPORT This report is required by Unit 2 Technical Specifications section 6.9.2.

This section of the Technical Specifications states that Special Reports' for '

fire protection equipment operating and surveillance requirements shall be submitted as required by the fire Hazards Analysis (FHA) and its Appendix B requirements.

Appendix B, section 1.9.1 of the FHA states that emergency lighting equipment must be operable at all times. The Action Statement states that in the 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 Special Report must be prepared and- submitted to the Commission within 30 days, in the event described in this report, a battery powered emergency lighting unit was inoperable for greater than 72~

hours.

B. UNIT STATUS AT TIME 0F EVENT On 11/5/92, Unit 2 was in cold shutdown near the end of the tenth refueling outage.

4 C. DESCRIPTION OF EVENT On 11/2/92, non-licensed maintenance personnel were performing surveillance procedure 42SV-FPX-003-05, " Emergency Lighting Surveillance." The procedure provides guidelines for the inspection and functional testing of the remote shutdown path emergency lighting uni;s which implement the requirements of the fire protection equipment operating and surveillance requirements of FHA-Appendix B, Sections 2.9.1.a and 2.9.1.b. This is accomplished by performing a' monthly inspection of the physical condition of indicating.

lamps, battery electrolyte level, etc. An 8 hour9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> battery discharge test is conducted on about one-twelfth of the lighting units approximately every 31-days, such that all-the lighting units are tested at least once per year.

During performance of the monthly- operability test on lighting unit-2R42-Ell 3, the light failed to illuminate. Deficiency Card (DC)L2-92-3687' was written to document the failure of the subject light and to initiate corrective actions. Limiting Condition for Operation (LCO) 2-92-905 was initiated 11/2/92 at 1229 CST to track corrective actions. However, the light could not be restored to operable status within the 72 hour8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> period allowed by FHA Appendix B, Section 1.9.1. Therefore, DC 92-3748 was L

HL-3054 004383

ENCLOSURE (Continued)

Special Report 2-92-005 BATTERY POWERED EMERGENCY LIGHTING UNIT INQP[RAMLEMAERI0ILGRfALLR THAN 72110_URS written to document the fact that lighting unit 2R42-fil3 remained inoperable for greater than 72 Sours, following the completion of repairs on the failed light and the satisfactory completion of testing per the procedure, the light was restored to operable status on 11/6/92 at 0110 CST and LCO 2-92-905 was terminated.

D. CAUSE Of EVENI lhe cause of this event was the failure of battery powared emergency lighting unit 2R42-Ell 3 to pass a regularly scheduled surveillance. Efforts were made to repair and restore the affected light to an operable status within the 72 hour8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> period, and pursuant to this, a new emergency lighting unit was installed. Ilowever, the new unit is required to be chargeri, functionally tested by a discharge test, and recharged after the test. Due to the time involved in effecting repairs (i.e., 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> for charging of the new battery unit, 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> of conducting a battery discharge test, 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> rer post test recharging and some amount of time required for parts check : ut and repair), the subject light was restored to operable clatus approximately 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> after the required 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> had elapsed.

E. ANALYSIS Of EVENT The battery-powered emergency lighting units are designed to provide G illumination for certain areas and for pieces of equipment in the event of a _

fire concurrent with a loss of offsite power (LOSP). During a LOSP, the automatic load shedding function of the emergency diesel generators will disconnect power to various areas of normal plant lighting, thereby tripping the emergency lights. Lighting unit 2R42-Ell 3 is used to illuminate the Reactor Building West Torus area below the 130' elevation, in the event that the normal lights for the affected area are extinguished and the emergency lighting units fail to operate, plant operators can use flashlights for any required emergency operations. Procedure 34G0-0PS-030-25, " Daily inside Rounds" requires plant operators to carry flashlights with them during their daily rounds. Also, flashlights are available continually in the maintenante tool storage area for use during emergencies. Based on the above analysis, it is concluded that this event had no adverse impact on nuclear safety, lil-3054 '

004383

ENCLOSURE (Cor,*inued)-

Special Report 2-32-005 BATTERY POWERED EMERGU40' LIGHTING UNIT INOPERABLE FOR A PERIQ.DJftEATER THAN 72 H01JJLS F. CORRECTIVE ACTIONS Battery-powered emergency lighting unit 2R42-Ell 3 was replaced with a new unit under MWO 2-92-5693 and verified operable by performing an 8-hour battery discharge test in accordance with the requirements of the FHA Appendix B, section 2.9.1.b.

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HL-5054 l 004383 5