ML20134M421

Special Rept:On 961011,Fire Doors 849 & 260 Were Declared Inoperable.Doors Were Opened for Period Greater than 7 Days to Support Activities Performed During Unit 2 Refueling Outage.Fire Watch Was Established IAW Action Statement

ML20134M421
Person / Time
Site:	LaSalle
Issue date:	11/15/1996
From:	Ray D COMMONWEALTH EDISON CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
NUDOCS 9611250090
Download: ML20134M421 (2)

Text

I

, Commonwealth lifison G>mpany 12%alle Generating Station

, , 2(01 North 21st Road Starseities. IL 61311-9%'

Tel Hl5 35W61 1

November 15,1996 United States Nuclear Regulatory Commission Attention: Document Control Desk Washington, D.C. 20555 This Special Report is submitted in accordance with LaSalle Unit 1 and 2 Operating Licenses NPF-11 and NPF-18, Appendix A, and Technical Specifications 3.7.6,3.3.7.9 and 6.6.C.

Technical Specification 3.7.6 " Fire Rated Assemblies" Technical Specification 3.7.6 requires that all fire rated assemblies, including 1 walls, floor / ceilings, cable tray enclosures and other fire barriers separating safety-related fire areas or separating portions of redundant systems important to safe shutdown within a fire area, and all csaling devices in fire rated assembly penetrations (fire doors, fire w;ndcws, fire dampers, cable and piping penetration seals and ventilation seals) shall be OPERABLE at all times.

At 1030 hours0.0119 days <br />0.286 hours <br />0.0017 weeks <br />3.91915e-4 months <br />, on October 11,1996, Fire Doors 849 and 260 were declared inoperable. The doors were opened for a period greater than seven days, to support activities performed during the Unit 2 Refueling Outage (L2R07).

Door 849 is located within Fire Zone 4E3 Unit 1 Division 2 Essential Switchgear Room (Auxiliary Building ulevation 731'). This door serves to divide this zone into two subzones 4E3-1 and 4E3-2. Door 260 serves to

, divide Fire Zone 4E3 Unit 1 Division 2 Essential Switchgear Room (Auxiliary Building elevation 731') from Fire Zone 4E4 Unit 2 Division 2 Essential

. Switchgear Room (Auxiliary Building elevation 731').

The doors were opened to route a temporary power cable in support of Temporary Alteration TALT 1-0099-96 "TALT Power Division ll Battery Charger for 242Y Bus Drop".

I 9611250090 961115 PDR ADOCK 05000373 S PDR 2200GO u nwem o,mn.m>

. l

}- .e .

j An hourly Fire Watch was established in accordance with the Action 1 i Statement of Technical Specification 3.7.6. This watch remained in effect 1

i until both doors were closed. -This compensatory measure along with the .

operable fire detection exist ng en both sides of the doors and the oversight

!' of the Fire Protection Administrative Program ensured the level of fire t

protection was not reduced. The doors were returned to service on  !

October 25,1996 at 1329 hours0.0154 days <br />0.369 hours <br />0.0022 weeks <br />5.056845e-4 months <br />.

2 Technical Specification 3.3.7.9 " Fire Detection Instrumentation" Technical Specification 3.3.7.9 requires as a minimum, the fire detection instrumentation for each fire detection zone of Unit 1 and Unit 2 shown in e .Table 3.3.7.9-1 shall be OPERABLE whenever the equipment protected by l

the detection instrument is required to be OPERABLE. j 4

~

1

At 2045 hours0.0237 days <br />0.568 hours <br />0.00338 weeks <br />7.781225e-4 months <br />, on October 81996, fire detection zones 2-34 and 2-35 were

declared inoperable. At 2230 hours0.0258 days <br />0.619 hours <br />0.00369 weeks <br />8.48515e-4 months <br />, the following day, October 9,1996, fire-j detection zones 2 23,2-24,2-17,2-17P,2-22, and 2-22P were also .

declared inoperable. All eight zones were impaired for a period greater than  !

fourteen days to support activities performed during the Unit 2 Refueling i Outage (L2R07). These detection zones are located in the Unit 2 Reactor  !

Building at elevations 820',761,740', and 710'. t 1

At 1630 hours0.0189 days <br />0.453 hours <br />0.0027 weeks <br />6.20215e-4 months <br />, on October 11 1996, fire detection zone 2-28 was declared inoperable. This zone was also impaired for a period greater than fourteen days to support activities performed during the Unit 2 Refueling Outage (L2R07). This detection zone is located in the Unit 2 Diesel Generator Building at elevations 674'.

During the Refueling Outage, a number of activities such as cutting and ,

welding are in progress. These activities have in the past caused the j detection zones to alarm. The increased frequency of these false alarms has the potential to distract and desensitize workers to fire alarms.

In accordance with the Action Statement of Technical Specification 3.3.7.9, a one hour Fire Watch has been established. This watch will remain in 1 effect until the detection zones are restored. This compensatory measure I along with the additional fire pro'.ection measures provided when activities such as cutting and welding occur and the oversight of the Fire Protection  !

Administrative Program ensure the level of fire protection will not be ,

reduced. The zones will be returned to service upon completion of activities  !

requiring cutting and welding. 1 i

._ _ _ _.4

_ _ _ _ _ . . _ . _ _ . . _ _ = . _ . _ _ . _ . _ . . _ _ _ _ _ _ . _ . . . . _ _ _ _ . _ . _ . . . _ . .

. & a If there are any questions or comments conceming this letter, please refer l them to me at (815) 357-6761, extension 2212. I Respectfully,

)

i D.J. Ray i Station Manager l LaSalle County Station cc: A. B. Beach, NRC Region Ill Administrator {

M. P. Huber, NRC Senior Resident inspector - LaSalle  !

D. M. Skay, Project Manager - NRR - LaSalle

. F. Niziolek, Office of Nuclear Facility Safety - IDNS '

DCD - Licensing (Hardcopy: Electronic: )

Central File J

l l

l o

P i

i

,- ~ , , _ , , _ . _ . . - .,