ML20214T410

Application for Amends to Licenses DPR-39 & DPR-48,revising Tech Specs to Allow Simultaneous Charging Pump Operation During Pump Realignment & to Reduce Allowable Time Period for Depressurization Following Failure of Porv.Fee Paid

ML20214T410
Person / Time
Site:	Zion  File:ZionSolutions icon.png
Issue date:	05/29/1987
From:	Leblond P COMMONWEALTH EDISON CO.
To:	NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM)
Shared Package
ML20214T414	List: ML20214T410 ML20214T425
References
NUDOCS 8706100251
Download: ML20214T410 (2)

Text

" / 1 Commonwealth Edison f One First National Plaza. Chicago, Illinois

• \ ( Address Reply to: Post Office Box 767 L/ Chicago, Illinois 60690 0767 May 29, 1987 U.S. Nuclear Regulatory Commission Attn: Document Control Desk Office of Nuclear Reactor Regulation Washington, DC. 20555

Subject:

Zion Nuclear Power Station Units 1 & 2 Proposed Amendment to Facility Operating License Nos. DPR-39 and DPR-48 Low Temperature Overpressure Protection NRC Docket Nos. 50-295 and 50-304 Gentlemen:

Attachment 1 to this letter in a proposed amendment to Facility Operating License Nos. DPR-39 and DPR-48, Appendix A, Sections 3.3.2.G &

4.3.2.G-Low Temperature overpressure protection. This proposed amendment reflects the Standardized Technical Specification (STS) format. In addition, it allows for simultaneous charging pump operation during pump realignment and reduces the allowable time period for depressurization following the failure of a Power Operated Relief Valve (PORV).

Attachment 2 provides a detailed description of the proposed amendment and compares the proposed change to the existing guidance contained in the Standardized Technical Specifications, NUREG - 0452, Revision 4. This description identifies and justifies the proposed variations from the STS.

The proposed amendment also incorporates the flexibility to operate two centrifugal charging pumps for short durations of time to allow for the maintenance of reactor coolant pump (RCP) seal injection to be maintained during pump switchover operations. The amount of time in which two charging pumps will be operated simultaneously is extremely small. This flexibility is needed to preclude the potential for debris induced RCP seal failure induced by seal back flow during the interruption of seal injection.

Attachment 3 contains Commonwealth Edison Company's demonstration that this proposed amendment does not involve a significant hazards consideration. This change has received on-site and Off-site review and approval.

A $150.00 remittance is enclosed in accordance with 10 CFR 170. As provided by 10 CFR 50.91, the State of Illinois is being notified of this amendment request by transmittal of a copy of this letter ar,d t e

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. _ _ _ b Mr. H. R. Denton May 29, 1987 If you have any questions regarding this matter, please direct them to this office.

Very truly yours, P. C. LeBlond Nuclear Licensing Administrator 1m cc: Resident Inspector - Zion J. A. Norris - NRR M. C. Parker - IDNS Regional Office - RIII SUBSCRIBdD and SWORN to e this 7/'1 day befory}

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