ML19208C843
| ML19208C843 | |
| Person / Time | |
|---|---|
| Issue date: | 08/31/1979 |
| From: | Ross D NRC - TMI-2 BULLETINS & ORDERS TASK FORCE |
| To: | Reed C COMMONWEALTH EDISON CO., WESTINGHOUSE OPERATING PLANTS OWNERS GROUP |
| References | |
| NUDOCS 7909270562 | |
| Download: ML19208C843 (5) | |
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.k UNITED STATES y)3e(
p, NUCLEAR REGULATORY COMMISSION 5.p ~ (, E WASHINGTON. D. C. 20555 ggg 311979 Mr. Cordell Reed, Chairman Westinghouse Owners' Group Commonwealth Edison Company P.O. Box 767 One First National Plaza Chicago, Illinois 60690
Dear Mr. Reed:
SUBJECT:
REQUEST FOR ADDITIONAL INF0P.MATION REGARDING WCAP-9600 Before the staff can complete its review of the report WCAP-9600, " Report on Small Break Accidents for Westinghouse NSSS Systen," additional infor-mation is required. The required information, which concerns r.edeling of the pressurizer drain and vessel level, is identified in the enclosure.
In order to expedite our review, we request that you furnish the requested information in a timely manner. Please provide, within seven days of receipt of this letter, your schedule for responding to the information requests contained in the enclosure.
If you have any questions about the contents of this letter, please con:act Patrick D. O 'Reilly (301/492-7745), the Bulletins & Orders Task Force Project Manager for Westinghouse-designed plants.
Si ncerely,
\\
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D. F. Ross, Jr., Director Bulletins & Orders Task Force Enclosure :
As stated cc: See attached lists 7909270SsZ_
1043 136
Enclosure ADDITIONAL INFORMATION NEEDS REGARDING W MODELING OF PRESSURIZER DRAIN AND VESSEL EtVEL 1.
Pressurizer Drain Section 2.3 of WCAP-9600 states'that the'present evaluation model representation of the surge line does not allow counterc rrent 2-phase flow.
During small break, events in which the pressurizer is calculated to drain (e.g., closure of a stuck-open PORV) it is unclear how draining takes place since this modeling does not appear to let steam enter the pressurizer to replace the liqu'd draining out.
Discuss how the present model allows pressurizer draining and if it has been compared to experimental data.
2.
Level Calculation (Verification)
According to Section 2.10 of WCAP-9600, verification of the drift velocity correlation was demonstrated by comparing the overall level model (which utilizes the drift velocity correlation) to the tests from which the correlation was derived. This does not appear to be a valid verification method due to a lack of independence. Has the level model been compared against data other than that from which it was derived?
3.
Level Calculation (Drift Velocity)
Provide additional infordation regarding the drift velocity correlation and its applicability over the indicated pressure range.
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Westinghouse Owners Group Representatives
,. Husain Herman Thrash fankee Atomic Electric Company Alabama Power Company 20 Turnpike Road 600 North 18th Street
- estboro, Massachusetts 01581 P. O. Box 2641 Birmingham, Alabama 35291
.ik W. Wells
.;artheast Utilities George Liebler 3
. Box 270 Florida Power & Light Co.
iartford, Connecticut 06101 P. 0. Box 529100 Miami, Florida 33152 Robert W. Jurgensen American Electric Power Service Corp.
2 Broadway Mark Marchi
P. O. Box 1200 Green Bay, Wisconsin 54305
.4. Ji Cahill Consolidated Edison 4 Irving' Place F. Pat Tierney, Jr.
- iew York, N. Y.
10003 Northern States Power Co.
Route 2 Welch, Minnesota 55089 Peter W. Lyon Power Authority of the State of New York Roger Newton 10 Columbus Circle Wisconsin Electric Power Co.
New York, New York 10019 231 West Michigan Milwaukee, Wisconsin 53201
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John A. Ahladas Virginia Electric & Power Company Cordell Reed One James River Plaza Commonwealth Edison Co..
P. O. Box 26666 P. O. Box 767 Richmond, Virginia 23261 One First National Plaza Chicago, Illinois 60690 Frank P. Librizzi Daniel I. Herborn Public Service Electric & Gas Co.
Portland General Electric Company 121 West Salmon Street ar ersey 07101 Portland, Oregon 97204 SJerry G. Haynes Dave Waters Southern California Edison Co.
Carolina Power & Light 2244 Walnut Grove Avenue Rosemead, California 91770
$1igh Nr Carolina 27602 Jim Gormly J. J. Carey Pacific Gas & Electric Co.
Duquesne Light 77 Beal. Street P. O. Box 1551 San Francisco, California 94106 Shippingport, PA.
15077 Robert Mecredy Bill Layman 70chester Gas & Electric d
1/ - t Electric Power Research Institute Q f~
3412 Hillview Avenue 29 tast Avenue
", Q' t i!nj Palo Alto, California 94303 e
i Rochester, N. Y.
14649 N
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..e pages Westinghouse Owners Group Representatives Bob Szalay Atomic Industrial Forum 7101 Wisconsin Avenue Bethesda, Md. 20014 Thomas D. Keenan Vermont Yankee Nuclear Power Corp.
77 Grove Street Rutland, Vermont 05701 eem Bf9 16:fiilRno UD 99 wc ~,h,y.n m
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h o uu J eu u i!Laa 1043 139
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WESTINGHOUSE.0WNERS GROUP PRINCIPAL CONTACT LIST Mr. Alan R. Barton Senior Vice-President Mr. George T. Berry, Executive Director Power Authority of the State of New Yor Alabama Power Company 10 Columbus Circle P. O. Box 2641 New York, N. Y. 10019 Mr. J. A. Jones Senior Vice-President MR. F. P. Librizzi, General Manager Electric Production, Production Dept.
Carolina Power & Light Company Public Service Electric & Gas Company 336 Fayetteville Street 80 Park Place, Room 7221 Raleigh, North Carolina 27602 Newark, N. J.
07101 Mr. Cordell Reed Mr. W. L. Proffitt Assistant Vice President Senior Vice-President - Power Commonwealth Edison Company Virginia Electric & Power Co.
4 P. O. Box 767 P. O. Box 26666 q
Chicago Illinois 60690 Richmond, Virginia 23261 3
S Mr. William J. Cahill, Jr.
Mr. S 1 Burstein, Executive Vice-President Vice-President Wisconsin Electric Power Company Consolidated Edison Company 231 West Michigan Street of New York, Inc.
Milwaukee, Wisconsin 53201
-j New York, N. Y. 10003
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Mr. Eugene R. Mathews, Vice-President Mr. C. N. Odnn, Vice-President Power Supply & Engineering Operations Division Wisconsin Public Service Corporat1on "fxh P"
e [1 ay, consin 54305 venue Pittsburgh, PA.
15219 Mr. Robert H. Groce, Licensing Engineer Dr. Robert E. Uhrig. Vice-President Yankee Atomic Electric Company Advanced Systems and Technology 20 Turnpike Road Florida Power & Light Co.
Westboro, Mass.
01581 P. O. Box 529100 Miami, Florida 33152 Mr. W. G. Couns11, Vice-President Nuclear Engineering & Operations Mr. John Dolan, Vice-President Connecticut Yankee Atomic Power Co.
Indiana and Michigan Electric Company P. O. Box 270 Indiana and Michigan Power Company Hartford, Connecticut 06101 P. O. Box 18 Bowling Green Station 7 pO ' (i ' fqd Mr. Leon D. White, Jr., Vict::-President b' i New York, New York 10004 Electric & Steam Production i
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Rochescer Gas & Electric Corporation d
89 East Avenue Mr. L. O. Mayer, Manager 1 ; [3,_
Rochester, N. Y. 14649 I
1 Nuclear Support Services uj; 3'D b NorthernStatesPowerCompTny[,
Mr.JamesH. Drake,Y1ce-Presiaent 414 Nit llet Mall - 8th Floor Southern California Edison Company Minneaspolis, Minnesota 55401 2244 Walnut Grove Avenue-P.O. Box 800 Rosemead, California 91770 Mr. Charles Goodwin, Jr.
Assistant Vice-President Portland General Electric Company 1043 140 121 S.W. Salmon Street Portland, Oregon 97204