ML20066B900

Application for Amend to Licenses DPR-29 & DPR-30 Requiring Drywell Oxygen Concentrations to Be Maintained Below 4% Vol

ML20066B900
Person / Time
Site:	Quad Cities
Issue date:	11/01/1982
From:	Rausch T COMMONWEALTH EDISON CO.
To:	Harold Denton Office of Nuclear Reactor Regulation
Shared Package
ML20066B902	List: ML20066B900 ML20066B908
References
5364N, NUDOCS 8211090240
Download: ML20066B900 (2)

Text

• [N Commonwe:lth Edison

[ ) One First fationil PLiza Chicago, Illinois

! k7 ) hddress R* ply to: Post Oifice Box 767 *

,/ Chicago, Illinois 60690 November 1, 1982 Mr. Harold R. De n to n , Directo r Of fice o f Nuclear Reactor Regulhtion U.S. Nuclear Regulatory Commission Washington, DC 20555

Subject:

Quad Cities Station Units 1 and 2 Proposed Amendment to DPR-29 and DPR-30 Technical Specifications Concerning Containment Oxygen Content NRC Docket Nos. 50-254 and 50-265 Re ference (a): T. J. Rausch letter to D. G. Eisenhut dated September 15, 1982.

Dear Mr. Denton:

Pursuant to 10 CFR 50.59, Commonwealth Edison proposes to amend Appendix A, Technical Specification to Quad Cities Station Units 1 and 2 Operating Licenses DPR-29 and OPR-30. The requested change will require drywell oxygen concentrations to be maintained below 4% by volume; current Quad Cities Technical Specifications require 5% by weight (approximtely 4.4% by volume) . ,

This amendment is requested to maintain consistency between the Technical Spec:fications and the analyses submitted in Reference (a), wherein we concluded that the Quad Cities units rely on nitrogen inerting, not' purge /repressurization as the primary means of combus-tible gas control.

At tachment A to this letter provides the change requested.

These changes have received On-Site review and approval and are currently undergoing Of f-Site review.

The change to 4% by volume oxygen concentration is in the conservative direction and can only increase margins of plant safety.

So as to minimize the impact this change has on unit power operation, specification 3.7. A.5.6 is also being changeo to allow additional 2C4)g time from when the mode switch is placed in run and the time at which j *

, 4% must be achieved. It must be emphasized that the time required to reach a given oxygen concentration greatly increases as the VY desired concentration decreases, and that in fact, the unit normally b

0 operates well below the limit.

'4$0 0 In accordance with 10 CFR 170, we have determined that this request consists of a combined Class I and Class III amendment.

Accordingly, a f ee remittance o f $4,400 is enclosed.

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l7821' PDR ADOCK P

090240 821101 05000254 PDR i

H. R. Denton -

2- November 1, 1982 Please address any questions you may have concerning this matter to this_ office.

Three (3) signed originals and thirty-seven copies o f this transmittal are provided for your use.

Very truly yours, h/

Thoma s J. Raus ch W

i4Jclear Licensing Administrator 1m cc: Region III Inspector - Quad Cities SUBSCRIBED and SWORN to befoge me this /td. day of UA a p e fr/ D , 1982 ussh bj$! O_ -

No tary Public l

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