ML20214X272

Proposes Listed Mods to Existing Fire Watches,Per NRC 870518-20 Insp & Design Changes Re Penetration Seal Upgrade Effort.Written Concurrence W/Guidelines Requested

ML20214X272
Person / Time
Site:	Fort Saint Vrain
Issue date:	06/08/1987
From:	Robert Williams PUBLIC SERVICE CO. OF COLORADO
To:	Calvo J Office of Nuclear Reactor Regulation
References
P-87210, TAC-54373, NUDOCS 8706160407
Download: ML20214X272 (3)

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June 8, 1987 IsnMcYeo201-os40 Fort St. Vrain Unit No. 1 R.O. WILUAMS, JR.

P-87210 vgP ESDEN U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, D.C.

Attention: Mr. Jose A. Calvo, Director Project Directorate IV Docket No. 50-267

SUBJECT:

Revisions to Fort St.

Vrain Fire Watches

REFERENCE:

1) PSC letter, Lee to Johnson, dated 7/11/85 (P-85245)

2) NRC letter, Heitner to Williams, dated 4/2/87 (G-87122)

3) PSC letter, Williams to Berkow, dated 2/27/87 (P-87076)

Dear Mr. Calvo:

As a result of the recent NRC inspection of May 18-20, 1987, and design changes associated with the penetration seal upgrade effort, PSC proposes that the existing Fort St. Vrain (FSV) fire watches be modified as follows:

1. An hourly fire watch will be maintained for those plant areas which were identified by Mr. Dennis Kubicki of the NRC staff as possibly requiring additional evaluation for fire detection in the NRC inspection noted above. These areas are noted in l Attachment No.l. This fire watch will remain in place until the

additional fire detectors deemed necessary have been installed,

! tested, training completed, and declared operational, or concurrence has been obtained from the NRC that the existing fire detection system coverage is adequate.

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.f P-87210 June 8, 1987

2. Fire 1 barriers _ which contain ~ missing or degraded. fire barrier u . penetration seals .will be inspected via an hourly fire watch in h  : lieu of the twenty minute fire watch. (Ref. 1, 2).-_..The justification for this~ surveillance. frequency is the availability

-of the new . fire detection. system which will provide early

. notification of a fire in the vicinity of- those fire barriers needed for Appendix R required separation between Fire Protection Shutdown /Cooldown. trains.

3. PSC will maintain. a one hour fire watch on the Turbine Water Removal Pumps and their associated cabling until the: completion of the . third Turbine Water Removal; Pump ~ installation, in accordance with Ref. 3 commitments.- ;Thiso modification is scheduled for completion during the 4th refueling outage as-previously committed.

The above have been reviewed with Messrs. Dennis Kubicki and Kenneth Heitner:of the NRC staff, on May 22, 1987, and May 27, 1987. PSC has implemented- the. above fire watches at their associated surveillance

. frequencies. 'We would appreciate written NRC concurrence with these guidelines-respectively.

PSC will~ notify the NRC prior- to removal of any of these fire watches.

If you have any questions concerning this matter, please contact Mr.

M.'H.-Holmes at-(303) 480-6960.

Very truly yours, ,

R. O. Williams, Jr.

Vice President Nuclear' Operations

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.Attachme'nt 1 P-87210-p Page 1 AREAS WITH POTENTIALLY INADEQUATE FIRE DETECTION p

AREA DESCRIPTION LOCATION AREA (S) NEEDING SURVEILLANCE South.of Steam Chest Turbine Building - From EHC Unit South on Level 5 of the Level 5 (Elev. 4791') to the Condenser Turbine Building Train Bay Turbine Building - From Train Bay Door Level 5 (Elev. 4791') East to the end of the Auxillary Boiler Room Area under the Bus Turbine Building - Under Bus Duct Duct on Level 5 Level 5 (Elev. 4791') .from the Condenser of.the Turbine South to the Building Turbine Building's South Wall Two Health Physics Access Bay - West Both Rooms Storage Rooms End of Level 8 (Eley. 4846')

South of Steam Turbine Building - Area from the Chest on Level 6 Level 6 (Elev. 4811') Steam Chest South of the Turbine to the Turbine Building Area under the Bus . Turbine Building - Under Bus Duct from Duct on Level 6 of Level 6 (Elev 4811') the Condenser South to the Turbine Building the Turbine Building's South Wall Janitor's Closet Administrative / Janitor's Closet Office Building - Immediately to the Level 6 (Elev. 4811') South of the Men's Room

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