ML20205A113

Application for Amends to Licenses NPF-11 & NPF-18,allowing Operation of Plant W/Suppression Pool Temps of Up to 105 F

ML20205A113
Person / Time
Site:	LaSalle
Issue date:	10/07/1988
From:	Allen C COMMONWEALTH EDISON CO.
To:	NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM)
Shared Package
ML20205A119	List: ML20205A113 ML20205A121
References
5209K, NUDOCS 8810250397
Download: ML20205A113 (3)

Text

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7 AddiiissNilyVP6sFWdiiBoi767-N / Ch<ago, Enos 60630 0767 October 7, 1988 U.S. Nuclear Regulatory Comission Attne Document Control Desk Washington, DC 20555 Subjects LaSalle County Station Units 1 and 2 Application for Amendment to racility Operating Licenses NPT-11 and NPT-18 Appendix A, Technical Specifications HEC _DocieLHon a_50:11LanL50:12.4 References Letter dated August 5, 198ti Transmitting One-Time Request for an Amendment to Allow Operation With Suppression Pool Temperatures Above 100*F.

Gentlement  !

Fursuan*. to 10 CTR 50.90, Commonwealth Edison is hereb', applying for an amendment to racility Operating Licenses NPT-11 and NFT-18, Appendia A, Technical Specifications. This amendment will allow operation of both units with suppression pool temperatures of up to 105't. This application replaces Reference (a) in its entirety and is based on additional analysis suggested in a telephone conversation with NRC Staff. All copies of Reference (a) should be destroyed.

Attachment A contains background information and justification for the proposed change. Attachment B contains the proposed change to Technical Specification. Attachment C provides supplemental information to support this request. The supplemental information is proprietary information and will bw sent under separate cover, directly the the Project Manager.

The proposed Technical Specification change has been reviewed and approued by both Onsite and Offsite Review in accordance with Commonwealth i Edison Company procedures. This amendment has been reviewed in accordance I with 10 CFR 50.92(c) and determined that no significant hasards consideration l eulsts. That evaluation is documented in Attachment D. )

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s 9 US NRC October 7, 1988 Cemmonwealth Edison is notifying the State of 1111aois of our application for this amendment by transmitting a copy of this letter and its attachments go the designated State Official.

In accordance with 10 CFR 170, a fee remittance in the amount of

$150.00 was enclosed in Reference (a).

Please direct any questions you may have regarding thJs matter to this office.

Very truly yours, C. M. Allen Nuclear Licensing Administrator la cc Attachments (A): Background and Discussion (B): Proposed Technical Specification Change (C): Supplemental Supporting Information (D): Etaluation of Significant Nasards Consideration ect LaSalle Resident Inspector P. Ehemanski - NRR H. C. Parker - IDMS NRC Regional A&ministrator, RIII 5209K

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ATTAC1902fLA TECICLICAL_SE%CLEICATICtLi'llANGI E QUISI LASALL TLCWNTY_S T ATICtLUlllIS_ LAND _2 DACKGRQUNDlHILDISCU1'S10H BACKGROUND The suppression pool is cooled during normal, as well as abnormal, conditions by using the suppression pool coollig mode of the Residual Heat Removal (RHR) system. The cooling water for the RHR heat exchangers is the RHR Service Water system which usos the LaSalle cooling lake as a heat sink.

t This is located at the coolest part of the station cooling lake. When the l cooling lake temperature risos. the lowest temperature that the suppression pool can be maintained at also increases. During previous summers the suppression pool was able to be maintained below the limit of 100'r.

RISCUS110H 1

Illinois has experienced secord hot weather exceeding all expecta-l tions. Recently, the cooling lake temperature has alsen due to several consecutive days of very hot weather. During these periods, the suppression pool temperature has risen to very near the limit of 100*f. Lt.ekily, the weather cooled sufficiently at that time to provide relief and the lake and suppression pool temperatures decreased. However, it is anticipated that these elevated temperatures will pose a recurring problem at LaSalle County Station in future years during the summer months. i l

An evaluation of the ef fects fras allowing the suppresalon pool temperature to increase above 100'r has been conducted (Attachmt'nt C). The l

following items were considered in that analysis I

1. SRV Operation  !

2. UDCA Related Containment Response  !

3. ECCS Performan e I

4. EOPs l

5. Environmental Qualification )

6. Degraded Events and ATWS (outside design basis)

The conclusion of thi evaluation is that suffielent justification exists to allow permanently increasing the suppression pool temperature limit to 105'r.

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