ML20043A986

Special Rept 90-002:on 900328,portions of Recirculation Pump Motor Generator Set Room Wall Declared Inoperable.On 900327,electrical Raceways Declared Inoperable Due to Damaged Fire Wrapping.Hourly Fire Watch Initiated

ML20043A986
Person / Time
Site:	Hatch
Issue date:	05/21/1990
From:	Hairston W GEORGIA POWER CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
90-002, 90-2, HL-1111, NUDOCS 9005240006
Download: ML20043A986 (6)

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HL-1111 000559 p

May 21, 1990

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U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D.C. 20555 h '

, PLANT HATCH - UNIT 1 NRC DOCKET 50-321 OPERATING LICENSE DPR-57 SPECIAL REPORT 90-002 FIRE RATED ASSEMBLIES INOPERABLE FOR LONGER THAN 14 DAYS RESULT IN SPECIAL REPORT AS REOUIRED BY FIRE HAZARDS ANALYSIS Genntlemen:

In accordance, with- the requirements of the Plant Hatch Unit 1 Technical Specifications Section 6.9.2, and the Fire Hazards Analysis (FHA), Appendix B. Georgia Power Company is submitting the enclosed Special Report (SR) concerning an event where fire rated assemblies were i inoperable for longer than 14. days. This event occurred at Plant Hatch -

Unit 1.

Sincerely, WJ /Lt6 W. G. Hairston, Ill RPG/CLT/et

Enclosure:

SR 50-321/1990-002 c: (See next page.)

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! U.S. Nuclear Regulatory Comission May 21, 1990 Page Two c: Georcia Power Comoany Mr. H. C.- Nix, General Manager - Nuclear Plant Mr. J. D. Heidt, Manager Engineering and Licensing - Hatch GO-NORMS U.S. Nuclear Reaulatory Comission. Washinoton. D.C.

dr. L. P. Crocker, Licensing Project Manager - Hatch U.S. Nuclear Reaulatory Comission. Reaion 11 Mr. S. D. Ebneter, Regional Administrator Senior Resident inspector - Hatch l

000559

i t

ENCLOSURE  ;

PLANT HATCH - UNIT 1  ;

NRC DOCKET 50-321 OPERATING LICENSE DPR-57 .

SPECIAL REPORT 90-002 FIRE RATED ASSEMBLIES INOPERABLE FOR LONGER THAN 14 DAYS RESULT IN SPECIAL REPORT AS REQUIRED BY FIRE HAZARDS ANALYSIS ,

A. REQUIREMENT FOR REPORT This report is required by Unit 1 Technical Specifications section 6.9.2. This section of the Technical Specifications states that i 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.  ;

The FHA, Appendix B, section 1.1.1, states that fire rated assemblies separating portions of redundant systems important to safe shutdown within a fire area shall be operable. ACTION statement b, of FHA, Appendix B, section 1.1.1, allows for the fire rated assembly (s) to be inoperable for up to 14 days from identification of the condition. If this time is exceeded, a special report is required.  ;

The fire rated assemblies addressed in this report affected only Unit I and became non-functional at a time when all fuel had been removed from the Unit I reactor vessel core. In such a condition it is not t

possible for a fire to affect safe shutdown capability. The same 1 conservative actions were taken when the conditions were identified as  !

would have been taken had the fire barriers been required to be '

operable. However, the 14 day time limit fo'.inoperability did not begin until commencement of fuel loading. On 4/25/90, 14 days following the commencement of fuel loading, the fire rated assemblies l had not yet been restored. Thus, this special report is required.  ;

B. UNIT STATUS AT TIME OF EVENTS L On 3/27/90, Unit I was undergoing a refueling outage. As of 3/2/90, all fuel had been removed from the reactor vessel and was stored in the Spent Fuel Pool. Reloading of the Unit I reactor core began on L 4/11/90 with the first fuel bundle being inserted at approximately 0230 CST. On 4/25/90, Unit I was still in the Refuel mode.

p t

000559 HL-1111 Page 1 ,

)

1 ENCLOSURE (Continued)

SPECIAL REPORT 90-002 FIRE RATED ASSEMBLIES INOPERABLE FOR LONGER THAN 14 DAYS RESULT IN ,

SPECIAL REPORT AS REOUIRED BY FIRE HAZARDS ANALYSIS )

1 1

C. DESCRIPTION OF EVENT  ;

This report describes two events. The first event pertains to a fire .

rated assembly which was breached in a controlled manner to support 1 Unit 1 outage work. The second event concerns damage to cable tray fire wrapping during outage work activities on nearby plant equipment.  ;

Because of extensive on-going outage activities, the affected fire l rated assemblies could not be returned to operable status within the required 14 days. i On 3/28/90, at approximately 1100 CST, licensed plant operations personnel declared portions of the Recirculation Pump Motor Generator (MG) Set room wall inoperable. Portions of the fire protection wall ,

in fire zones 1210 and 1211 were removed in a controlled manner to

. provide access for the removal of the MG Set Rotor in support of .

outage related work activities. Deficiency Card 1-90-2667 was written to document the condition as required by the plant's administrative control procedures. Limiting Condition for Operation (LCO) 1-90-257 was initiated on 3/28/90 and an hourly fire watch was established as required by the FHA, Appendix B, section 1.1.1, ACTION a. On 4/25/90, portions of the Recirculation Pump MG Set room walls were still breached.  ;

t On 3/27/90, at approximately 1320 CST, licensed plant operations personnel declared electrical raceways ESS-I-3302 and ESS-I-3303 inoperable. The fire wrapping and cable tray hanger support for the affected raceways were damaged during outage work involving

l. disassembly of the Residual Heat Removal (RHR) Outboard Injection ',

valve lEll-F017A. The subject raceways supply power and control L

cables to IEll-F017A, and are located in fire zone 1205F. Deficiency Cards 1-90-1842-and 1-90-2668 were written to document the condition <

as required by the plant's administrative control procedures.

l Lit:itir.) Condition for Operation (LCO) 1-90-253 was initiated on 3/27/90 and an hourly fire watch was established as required by the  :

FHA, Appendix B, section 1.1.1, ACTION a.

L 000559 HL-1111 Page 2

I

• . j ENCLOSURE (Continued)

SPECIAL REPORT 90-002  ;

FIRE RATED ASSEMBLIES INOPERABLE FOR LONGER THAN 14 DAYS RESULT IN SPECIAL REPORT AS REQUIRED BY FIRE HAZARDS ANALYSIS )

1 D. CAUSE OF EVENT. ,

Removal of portions of the Recirculation Pump MG Set room walls ,

supported necessary outage related work. This work included removal, reconditioning, and reinsta11ation of the M/G Set Rotor and removal and replacement of existing cables. '

The fire barrier for raceways ESS-I-3302 and ESS-I-3303 was rendered inoperable as a result of personnel error. The affected cable tray  ;

sup) ort and fire wrappings were inadvertently damaged during outage wor ( activities performed on the 1 Ell-F017A valve and valve motor actuator.

E. ANALYSIS OF EVENT L Licensed plant operations personnel declared the fire rated assemblies inoperable and established the required fire watches to ensure .

compliance with the FHA section 1.1.1, ACTION a. The action statement '

requires that:

With one or more of the ... required fire rated assemblies !

and/or sealing devices (as stated in section 1.1.1) <

l inoperable, within I hour establish a continuous fire .

watch on at least one side of the affected assembly (s) and/or sealing device (s) or verify the o)erability of <

fire detectors on at least one side of tie ino)erable assembly (s) and sealing device (s) and establisi an

. hourly fire watch patrol.

o In the case of the Recirculation Pump MG . Set room wall, the fire rated '

assembly was breached in a controlled manner using administrative control s. In both cases fire watches were established and all

l. requirements of the FHA were met. These steps ensured that, were a l: fire to occur, it would be promptly detected and extinguished.

L Additionally, linear heat detectors mounted in the affected fire zones "

1 were operable at the time of the events and would have performed as l- designed in the unlikely event of a fire.

Furthermore, in the highly unlikely event of an undetected fire rendering the control scheme for IEll-F017A inoperable, the redundant loop of RHR was available to maintain shutdown cooling.

Based on the above information, it is concluded that these events had no adverse impact on nuclear safety.

l r 000559 HL-1111 Page 3

I , I l- .;

,o-ENCLOSURE (Continued)  !

SPECIAL REPORT 90-002 .

FIRE RATED ASSEMBLIES INOPERABLE  !

FOR LONGER THAN 14 DAYS RESULT IN SPECIAL REPORT AS REQUIRED BY FIRE HAZARDS ANALYSIS F. CORRECTIVE ACTIONS ,

l i

1. The affected fire rated assemblies were declared inoperable, and an hourly fire watch was initiated.

2. The removed portions of the Recirculation Pump Motor Generator Set room wall will be reinstalled and returned to o>erable status upon completion of the rotor maintenance wor (. This will occur prior to startup from the current Unit I refueling  ;

outage (approximately 6/2/90).

3. The personnel involved in damaging the cable tray fire wrap l were counseled

4. The fire wrap for raceways ESS-I-3302 and ESS-I-3303 was repaired and returned to operable status on 5/9/90.

000559 '

HL-1111 Page 4

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