ML20207Q913

Requests Concurrence to Reduce Roving Fire Watch,Committed to in Util ,To Hourly Fire Watch for Turbine Water Removal Pumps Effective on 870325.New Fire Detection Sys Described in Util Installed

ML20207Q913
Person / Time
Site:	Fort Saint Vrain
Issue date:	02/27/1987
From:	Robert Williams PUBLIC SERVICE CO. OF COLORADO
To:	Berkow H NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM), Office of Nuclear Reactor Regulation
References
P-87076, TAC-54373, NUDOCS 8703100202
Download: ML20207Q913 (3)

Text

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O Public Service ~

P.o. Box 840 Derr er, Co 80201440 2420 W. 26th Avenue, Suite 1000, Denver, Colorado 80211 R.O. WILLIAMS, JR.

ELEEO[EdMIONS February 27, 1987 Fort St. Vrain Unit No. 1 P-87076 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D.C.

20555 Attention: Mr. II. N. Berkow, Director Standardization and Special Projects Directorate Docket No.

50-267

SUBJECT:

Reduction of Roving Fire Watch at Fort St. Vrain

REFERENCE:

1) PSC Letter, Lee to Johnson, dated 4/1/85 (P-85113)

2) PSC Letter, Lee to Johnson, dated 7/11/85 (P-85245)

3) NRC Letter, Martin to Lee, dated 7/19/85 (G-85288)

4) NRC Letter, Heitner to Williams, dated 11/18/86(G-86607) 5)PSCLetter, Williams to Berkow, dated 1/16/87(P-87013)

Dear Mr. Derkow Public Snrvice Comp:t.v of Colorado (PSC) hereby requests NRC concurrence to reduce the Fort St. Vrain (FSV) rovinq fire watch, conini tted tu in Reference 2, to an hourly fire watch on the Turbine Water Removal Pumps, e'fectivo March 25, 1987.

I, 070310020D 070227 l'DH ADOCK 03000267 hD,lo von

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F&bruary 27. 1987a~

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p In Reference. 2,.PSC committed to a roving fire watch every twenty

• u minutes.as ani: interim compensatory measure.cntil the -.new ~ fire detection system, described -in Reference 1, was ojierational.. This roving fire watch presently._provides -general surveillance ofo the:

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sreas that are now covered by the new fire detectionisystem, and also specificallyl includes:. Loop II Bearing Water. Pumps, Ventilation damper valves PV-22153 and PV-22154,' Instrument Air Compressors,:and,4

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y'X Turbine Water Removal' Pumps.

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PSC has noted its intention to reduce.this roving fire watch once<the new fire detection system was operational,in References 1, 2, andV 5.

11n. a telephone conversation on Januaryt9; 1987, the NRC's Mr.-Dennis--

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,Kubicki indicated agreement with this proposed firei watch-reduction ~

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. when the new fire detectiori system was declared operational.

t 3-JUSTIFICATION 1,

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'S This new-fire detection' system h'as been installed and functional

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. testing is imminent. Operating procedures are being prepared. and operator.

trafning

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the.

detection system and fire watch 1

3 responsibilities will be completed by March 25, 1987.

.J The status ofL modifications -in th'e specific areas noted above are given in Table 4-1 in' Reference 5:

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Loop II BearidgiWater Pump cable rerouting 'has been

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-accomplished (item 4.10.tI) back; up air bottles have been supplied for ventilation dampe h l6 valves PV-22153 and PV-22154, thereby eliminating the need for-g-

the Instrument, Air Compressors (item 4.7)

IterRemovalPumpwillbeinstalledbystartup the third Turbine after the 4th Refueling outage (item 4.9).

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Since the new fire detection system is operational in the area of the two original Turbine Water Removal Pumps, it is considered sufficient n to"' reduce the fire watch frequency in this specific-area to once per hour.

s FUTURE FIRE WATCH REDUCTION-PLANS The Turbine. Watier Removal Pump modification consists of the 2 -

installation of;a third, full sized pump with sufficient separation from.

the' original' two pumps.

As an interim measure before installation of this new pump is completed, a repair; procedure similiar to those identified in Section 4.9 of Reference 1 will be prepared to use the new' mot'or to replace one of the existing motors if it were damaged by a fire.

There would be 15 to 20 hours2.314815e-4 days <br />0.00556 hours <br />3.306878e-5 weeks <br />7.61e-6 months <br /> available to effect this repair. When this motor is on site, and the repair' procedure is in place, the NRC will be provided justification and requested to concur with the elimination'of the remaining hourly fire watch on the Turbine Water Removal Pumps.

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P-87076-

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Pagr 3~

FIbruary 27,~1987

-If. you have any(303) 480-6960.. questions concerning this matter, please contac M. H. Holmes at--

Very truly yours, R. O. Williams, Jr.

Vice President, Nuclear Operations R0W/RS:jmt' o

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