ML20249A132

Forwards Response to 980602 Telcon W/T Polich Re Clarification of Wording of 980227 Lar,Revising RWST low-low Level Setpoint

ML20249A132
Person / Time
Site:	Comanche Peak
Issue date:	06/10/1998
From:	Terry C TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC)
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
TXX-98145, NUDOCS 9806160093
Download: ML20249A132 (4)

Text

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"""" 9 Log # TXX-98145

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File # 916 (3/4.3) i-I C

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Ref. # 10CFR50.90 7UELECTR/C 10CFR50.36 June 10,1998 l.

c. u.e, y.n.y Senior Mce President

& PrincipalNuclear oficer U. S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555 S'JBJECT:

COMANCHE PEAK STEAM ELECTRIC STATION (CPSES)

DOCKET NOS. 50-445 AND 50-446 SUPPLEMENT TO LICENSE AMENDMENT P.EQUEST 98-001 REVISION TO RWST LOW-LOW LEVEL SETPOINT REF:

TU Electric Letter, logged TXX-98033, from C. L. Terry to NRR dated February 27,1993.

Per the referenced letter, TU Electric requested an amendment to the CPSES Unit 1 Operating License (NPF-87) and CPSES Unit 2 Operating License (NPF-89). The proposed changes were to increase the RWST Low-Low level setpoint from "240%" to "245%" of span for CPSES Units 1 and 2 Technical Specification Table 3.3-3, item 7b.

Per phone conversation with Mr Tim Polich of NRR on June 2,1998, it was determined that one of the sentences addressing whether the change involved a significant reduction in a margin of safety was not clear, necessitating rewording for clarification. is the affidavit for information supporting this supplement to the subject license amendment request and Attachment 2 provides the necessary clarification to the response, in accordance with 10CFR50.91(b), TU Electric is providing the State of Texas with a copy of this supplementalinformation supporting the license amendment request.

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98G6160093 990610 PDR ADOCK 05000445-P PDR '

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CoMANCilE PEAK STEAM ELECTRIC STATION P.O. Box 1002 Glen Rose, Texas 76043-1002

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TXX-98145 Page 2 of 2

. Should you have any questions, please contact Mr. J. D. Seawrit

~4) 897 0140 Sincer ly,

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C. L. Terr [

JDS/grj Attachnients: 1.

Affidavit 2.

Clarification of Response c-Mr. E. W. Merschoff, Region IV Mr. T. J. Polich, NRR Mr. J.1. Tapia, Region IV Resident inspectors, CPSES Mr. Arthur C. Tate Bureau of Radiation Control Texas Department of Public Health 1100 West 49th Street

~ Austin, Texas 78704 I

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. to TXX 98145

. Page 1 of 10 UNITED STATES OF AMERICA-

'NI.lCLEAR REGULATORY C'OMMISSION -

In the Matter of

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1 Texas Utilities Electric Company

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Docket Nos.' 50-445 -

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'50-446 (Comanche Peak Steam Electric

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License Nos. NPF-87 Station, Units 1 & 2)

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NPF-89.

AFFIDAVIT C. L. Terry being duly sworn, hereby deposes and says that he is the Senior Vice President and

- Principal Nuclear Officer of TU Electric, the licensee herein; that he is duly authorized to sign

~and file with the Nuclear Regulatory Commission this information supporting License Amendment Request 98-001; that he is familiar with the content thereof; and that the matters set -

forth therein are true and correct to the best of his knowledge, information and belief.

. f __ h CTLTTerry f' '

Senior Vice PQos lent and

. Principal Nuclear Officer STATE OF TEXAS.

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COUNTY.OF u d(

- Subscribed and sworn to before me, on this /M/ day of Gw 1998.

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SUSAN C.GRAVATT NOTARY PUBLIC STATE OFM9 -

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4 th Commission Expires 3-?S-2001,

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J ' ** ^ ' Attachment - 2 to.TXX-98145

-Page 1 of 1-Clarification of Response to Question 3 3)

Do the proposed changes involve a significant reduction in a margin of safety?

There were no changes made to any of the accident analyses or safety analysis limits as a result of this proposed change. Further, the proposed change does not affect the acceptance criteria for any analyzed event.

ECCS, Containment spray, and the RWST will remain capable of perforrning their safety function, and the new requirement will continue to provide adequate assurance of that capability. Raising the RWST Low-Low setpoint from 40% to 45% has no impact on the assumptions used in the safety analysis as discussed in Chapter 15 of the FSAR. The margin of

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safety established by the Limiting Conditions for Operation also remains unchanged. Thus there is no effect on the margin of safety.-

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