ML19316A039

Forwards Description & Mechanical Design of Core Flooding Nozzle Flow Restrictor,Analysis of Core Flooding Line Break W/Flow Restrictor in Place & Charts Showing Effect of Device on ECCS Operation for Both Large & Small Breaks

ML19316A039
Person / Time
Site:	Oconee
Issue date:	01/15/1973
From:	Mallay J BABCOCK & WILCOX CO.
To:	Anthony Giambusso US ATOMIC ENERGY COMMISSION (AEC)
Shared Package
ML19316A038	List: ML19316A037 ML19316A039 ML19316A040
References
NUDOCS 7911210601
Download: ML19316A039 (1)

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Babcock & Wilcox e .e, ceme,,eo oms,eo P.O. Box 1260. Lynchburg, Va. 24Z5 Telephone: (703) 384 5111 Jaruary 15, 1973 Mr. A. Giambusso, Deputy Director for Reactor Projects Directorate of Licensing ,p g ,, ,, ; a;d c U.S. Atomic Energy Commission Washington, D. C. 20545 Re: Oconee Nuclear Station Docket No. 50-269

Dear Mr. Giambusso:

Attached are responses to several questions received over the last few months in regard to the Core Flooding Tank Line Break and, in particular, the questions received by telecon and discussed at our meeting of January 4, 1973 in Bethesda, Maryland.

Duke Power Company is installing a flow restrictor in the e sre flooding nozzle to restrict the magnitude of the blowdown and retain more water in the reactor vessel during the accident.

Attachment 1 provides a description and mechanical design of the device.

Attachment 2 provides an analysis of the Core Flooding Line Break with the flow restrictor in place.

Attachment 3 shows the effect of the device on the operation of the Emergency Core Cooling System for both large and small breaks.

The results for the Core Flooding Line Break for the Oconee reactor demonstrate that all of the AEC Interim Acceptance Criteria for Emergency Core Cooling Systems are satisfied.

Very truly yours, BABCOCK & WILCOX COMPANY Nuclear Power Generation 1

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James F. Mallay Manager, Licensing JFM/db Attach.

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The Babcock & Wilcox Company / Estabhshed 1867