ML19341D558

First Interim Deficiency Rept Re Environ Qualification of Electrical Equipment Associated W/Auxiliary Feedwater Pumps. Anslysis Will Determine Worst Case Accident Conditions.Next Rept by 810109

ML19341D558
Person / Time
Site:	South Texas
Issue date:	09/24/1980
From:	Oprea G HOUSTON LIGHTING & POWER CO.
To:	Seyfrit K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
References
ST-HL-AE-547, NUDOCS 8103050829
Download: ML19341D558 (5)

Text

7' / C The Light Company n.,m,.,n uu,ig >>- im>s noo n<,-n.rms vooi aims.wn Sec ember 24, 1980 ST-HL-AE-547 SFN: V-0530 Mr. Ka rl Seyfrit Director, Region lv Nuc I ea r Pegu I aton/ Commission MW N

(,,k eq 611 Ryan Plaza Drive, Suite 1000 ArIington, Texas 36012 / 7 .- g,h ;h ,

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Dear Mr. Seyfrit-  ! -

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Docket Nc_ 9 50-49S, STN 50-499 /N<

t r.te ri m Re. + Concerning y # U Y ['g

Er,vironmental OL ification of E lectrica l Eculomen. =ociated with tne AuxiIiarv Feecw, .m D s On August 25, 1980, Houston Lighting & Power Company noti'ied your of fice of a Dotentially reportab le def iciency concerning envi ronmenta l cualification of electrical equipment associated with the auxiliary feedwater pumes. Please find attached our first interim report on the sJbject deficiency. The next interim report wi l l be submitted to your office by January 9, 1981.

If you have any questions concerning this item, please contact Mr. Michael E. Powe!! at (713) 676-8592.

Very truly yours, s'/

M' 5 $

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/ Exec .ivereVicep_President

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8103050hb

Housto'n Lighting & Power Compam ' September 24,1980 ST-HL-AE-547 SFN: V-0530 Page 2 cc: D. G. Barker Howard Pyle  !

H. R. Dean R. L. Beeth J. D. Parsons R. L. Waldrop A. J. Granger R. A. Frazar M. D. Scwharz (Baker & Botts)

R. Gordon Gooch (Baker & Botts)

J. R. Newman (Lowenstein, Newman, Reis, Axelrad & Toll)

Director, Office of Inspection & Enforcement Nuclear Regulatory Comission Washington, D. C. 20555 M. L. Borchelt Executive Vice President Central Power & Light Company P. O. Box 2121 Corpus Christi, Texas 7B403 R. L. Range Central Power & Light Company P. O. Box 2121 Corpus Christi, Texas 78403 R. L. Hancock Director of Electrical Utilities City of Austin P. O. Box 1088 Austin, Texas 78767 T. H. Muehlenbeck City of Austin P. O. Box 1083 Austin, Texas 78767 J. B. Poston As;istan General Manager of Operations Ci y Public Service Board P. 3. Box 1771 San Antonio, Texas 78295 A. vonRosenberg City Public Service Board P. O. Box 1771 San Antonio, Texas 78296

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. Hiiuuren Lighting P,,wer C imp.i"' September 24, 1980 1

ST-nL-AE-547 SFN: V-0530 Page 3 Charles Bechoefer, Esquire Chairman, Atomic Safety & Licensing Board

U. S. Nuclear Regulatory Commission Washington, D. C. 20555

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Dr. James C. Lamb, III 313 Woodhaven Road Chapel Hill, North Carolina 27514 4

Dr. Emmeth A. Luebke Atomic Safety & Licensing Commission U. S. Nuclear Regulatory Commission Washington, D. C. 20555 Steven A. Sinkin, Esquire i 116 Villita Street San Antonio, Texas 78205 Citizens for Equitable Utilities

c/o Ms. Peggy Buchorn Route 1, Box 432 Brazoria, Texas 77422

Richard W. Lowerre, Esquire Assistant Attorney General for the State of Texas P. O. Box 12548 Capitol Station Austin, Texas 78711 Henry J. McGurren, Esquire Hearing Attorney Office of the Executive Legal Director U. S. Nuclear Regulatory Commission Washington, D. C. 20555 i

First Interim Report Concerning Environmental Qualification of Electrical Equipment Associated with the Auxiliary Feedwater Pumps Summary As the result of an environmental qualification design review, electrical equipment associated with the auxiliary feedwater pumps was identified to be qualified to a temperature which is below expected accident conditions. This condition is documented on Engineering Design Deficiency (EDD)80-310. This deficiency applies to electrical equipment, including pump motors, associated with the auxiliary feedwater pumr on Units 1 and 2 of the South Texas Project Electric Generating Station (STPEGS). This equipment is located at elevation

+10' of the Isolation Valves Cubicle structure (IVC) on each unit.

Description of Incident All equipment purchased via specification 35149M5043D (Auxiliary Feedwater Pumps and Motors) which is required to be qualified as Class 1E either has been or is currently being qualified to 1050F for both normal and accident conditions.

This temperature appears in criteria document lE019RQOO55, Minimum Information Requirements for Demonstrating Conformance with Standards for Qualifying Class lE Equipment, which is referenced in paragrapn 2.0 of the auxiliary feedwater equipment specification.

The qualification parameters in the IVC during postulated accident conditions have not been determined based on the current IVC configuration and the design initial conditions of 1050F and atmospheric pressure. Analysis done for 5.'Jrposes other than equipment qualification indicate that the temperature in an auxiliary feedwater pump cubicle will exceed 1050F in the event of a main steam line rupture.

This deficiency was discovered during a design review meeting concerning the environmental qualification of IVC equipment.

All auxiliary feedwater equipment required to be qualified as class iE has been delivered to STPEGS with the exception of those components contained in the auxiliary feedwater turbine control panel.

Corrective Action An analysis is currently being performed to determine the worst case accident conditions in the IVC based on the current configuration and the design initial conditions. The results of the analysis will be incorporated into the equipment specification and purchase order. Tne vendor equipment qualification plan will then be revised as necessary.

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An investigation of other equipment within the IVC environmental Qualifi-cation is initiated to determine design adequacy.

Equipment " hold" tags have been issued on tne basis of nonconformance report (fi:R) 5-G26S7.

Recurrente Control Measures to prevent recurrenes of this deficiency will be addressed in future reports.

Safety Analysis Since this deficienty represents a deviation from regulatory requirements and licensing commitments related to assuring auxiliary feedwater system function, the deficiency is considered reportable pursuant to 10CFR50.55(e).

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