ML19322B175

Comments on Seismic Design of Keowee Hydroelectric Facilities as It Relates to Oconee,In Response to NRC Request

ML19322B175
Person / Time
Site:	Oconee
Issue date:	04/29/1970
From:	Sharpe R JOHN A. BLUME & ASSOCIATES, ENGINEERS
To:	Case E US ATOMIC ENERGY COMMISSION (AEC)
References
CON-AT(49-5)-3011 NUDOCS 7912020032
Download: ML19322B175 (3)

Text

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A. Dromerick 3-4-70 Ler furnishing info os general review W/2 cys for action for seismic design of the zeewee hyro. facilities as they relata to DISTRIBUTICNs Oconee Phaelear Station ( Duke Peuer ENCLOSU RES: m Reg file ey 010 5 t x !=505-?

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Mr. Edson G. Case, Director y

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Subject:

Oconee Nuclear Station Units 1, 2, and 3 ,

Duke Power Company --

Final Safety Analysis Report Docket Nos. 50-269, -270, -287

Dear Mr. Case:

In accordance with your request, we have conducted a general review of the data received on April 20 concerning seismic design of the Keowee hydroelectric facilities as they relate to the Oconee huclear Station.

We hava the following comments:

3 1. We understand that the Keowee and Little River Dams, intake canal dikes and submerged weir were approved during the Construction Permit phase. Therefore, we have not reviewed these items.

2. An equivalent static load approach has been used in the analysis of all the hydroelectric facilities. This approach is justified in analysis of structures which may be considered essentially rigid but is not necessarily justified in the analysis of other structures and components. The applicant should present justification that the equivalent static load approach is appropM. ate for the following structures and components:

Intake Structure Powerhouse Concrete Substructure and Steel Superstructure, Spillway Concrete Gate Structure, Tainter Gates and Anchorage, and Substructure Concrete Control Building

3. We assume that the Emergency Breaker Vault is a critical facility.

l If this is so, drawings should be submitted.

4. The effects on the dams and structures of earthquake-generated waves on Lake Keowee have not been discussed. Their effects should be evaluated.

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Mr. Edson G. Case April 29, 1970

5. The seismic design of Jocassee Dam has not been discussed. If this Dam is critical, as we assume it is, the effects of its failure on the other dams and on the Nuclear Station should be evaluated or an analysis presented that eubstantiates its seismic adequacy.

Very truly yours, JOHN A. BLUME & ASSOCIATES, ENGINEERS b W Roland L. Sharpe

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