ML16242A139

Discusses 950208 Response to Re Potential Blowdown of Two SGs Following Single Line Break.Understands That Valves MS-33 & MS-84 Will Remain Closed on All Three Units to Prevent Potential Dual SG Blowdown

ML16242A139
Person / Time
Site:	Oconee
Issue date:	02/27/1995
From:	Merschoff E NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
To:	Hampton J DUKE POWER CO.
References
NUDOCS 9503080194
Download: ML16242A139 (4)

Text

PRIORITY 2 REGULATORENERMOMA EGthlfBUTION SYSTEM (RIDS)

ACCESSION NBR:9503080194 DOC.DATE: 95/02/27 NOTARIZED: NO DOCKET #

'iA CIL:50-269 Oconee Nuclear Station, Unit 1, Duke Power Co.

05000269 50-270 Oconee Nuclear Station, Unit 2, Duke Power Co.

05000270 50-287 Oconee Nuclear Station, Unit 3, Duke Power Co.

05000287 AUTH.NAME AUTHOR AFFILIATION MERSCHOFF,E.W.

Region 2 (Post 820201)

RECIP.NAME RECIPIENT AFFILIATION HAMPTON,J.W.

Duke Power Co.

SUBJECT:

Discusses 950208 response to 950106 ltr re potential blowdown of two SGs following single line break.Understands that valves MS-33 & MS-84 will remain closed on all three units to prevent potential dual SG blowdown.

DISTRIBUTION CODE: IE01D COPIES RECEIVED:LTR {

ENCL 0 SIZE:

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0 TITLE: General (50 Dkt)-Insp Rept/Notice of Violation Response NOTES:

RECIPIENT COPIES RECIPIENT COPIES ID CODE/NAME LTTR ENCL ID CODE/NAME LTTR ENCL PD2-3 PD 1

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EXTERNAL: LITCO BRYCE,J H

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NOTE TO ALL "RIDS" RECIPIENTS:.

PLEASE HELP UIS TO REDUCE WASTE! CONTACT THE DOCUMENT CONTROL DESK, ROOM Pl -37 (EXT 504-2083 )TO ELIMI11NATE Y'OUR NAME FROM DISTRIBUTION LISTS FOR DOCUMENTS YOU DON'T NEED!

TOTAL NUMBER OF COPIES REQUIRED: LTTR 20 ENCL

February 27, 1995 Duke Power Company ATTN: Mr. J. W. Hampton Vice President Oconee Site P. 0. Box 1439 Seneca, SC 29679

SUBJECT:

NRC INSPECTION REPORT NOS. 50-269/93-31, 50-270/93-31 AND 50-287/93-31 Gentlemen:

This concerns your response of February 8, 1995, to our January 6, 1995, letter regarding the potential blowdown of two steam generators following a single line break (Deviation 50-269,270,287/93-31-01).

Pending further engineering analysis on your part, it is our understanding that valves MS-33 and MS-84 will remain closed on all three units to prevent the potential dual steam generator blowdown following a break in either the auxiliary steam header or the turbine driven emergency feedwater pump steam header. We will review the results of your additional engineering analysis, as well as your indicated Final Safety Analysis Report revisions, during future inspections.

We appreciate your cooperation in this matter.

Sincerely, Original signed by Jon R. Johnson (for)

Ellis W. Merschoff, Director Division of Reactor Projects Docket Nos. 50-269, 50-270 and 50-287 License Nos. DPR-38, DPR-47 and DPR-55

-cc:

E. Burchfield Compliance Duke Power Company P. 0. Box 1439 Seneca, SC 29679 A. V. Carr, Esq.

Duke Power Company 422 South Church Street Charlotte, NC 28242-0001 County Supervisor of Oconee County Walhalla, SC 29621 cc continued:

(See page 2)

OFFICIAL COPY 9503080194 950227 PDR ADOCK 05000269 Q

PDfR

DPC 2

cc continued:

Robert B. Borsum Babcock and Wilcox Company Nuclear Power Generation Division 1700 Rockville Pike, Suite 525 Rockville, MD 20852 J. Michael McGarry, III, Esq.

Winston and Strawn 1400 L Street, NW Washington, D. C. 20005 Office of Intergovernmental Relations 116 West Jones Street Raleigh, NC 27603 Max Batavia, Chief Bureau of Radiological Health South Carolina Department of Health and Environmental Control 2600 Bull Street Columbia, SC 29201 Manager, LIS NUS Corporation 2650 McCormick Drive Clearwater, FL 34619-1035 Robert P. Gruber Executive Director Public Staff NCUC P. 0. Box 29520 Raleigh, NC 27626-0520 G. A. Copp Licensing - EC050 Duke Power Company P. 0. Box 1007 Charlotte, NC 28201-1007 Karen E. Long Assistant Attorney General N. C. Department of Justice P. 0. Box 629 Raleigh, NC 27602 Distribution:

(See page 3)

DPC 3

Distribution:

L. A. Wiens, NRR R. Carroll, RH R. V. Crlenjak, RH G. A. Hal1strom, RH PUBLIC NRC Resident Inspector U.S. Nuclear Regulatory Commission Route 2, Box 610 Seneca, SC 29678 SEND OFC DRP:RII DRP:RII TO NAME RCarroL RCRLENJAK PDR?

DATE 02

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