ML17194A469
| ML17194A469 | |
| Person / Time | |
|---|---|
| Site: | Dresden  |
| Issue date: | 02/09/1982 |
| From: | Oconnor P Office of Nuclear Reactor Regulation |
| To: | Delgeorge L COMMONWEALTH EDISON CO. |
| References | |
| TASK-02-04.E, TASK-2-4.E, TASK-RR LSO5-82-02-062, LSO5-82-2-62, NUDOCS 8202180257 | |
| Download: ML17194A469 (5) | |
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February 9, 1982 Docket No. 50-237 L$05 02- 062 Mr. L. OelGeorge Director of Nuclear Licensing Commonwealth Edison Company Post Office Box 767 Chicago, Illinois 60690
Dear Mr. DelGeorge:
SUBJECT:
SEP SAFETY TOPIC II-4. E, DAM INTEGRlTY DRESDEN NUCLEAR POWER STATION UNIT NO. 2 We have completed our review of the subject topic for Dresden Nuclear Power Station Unit No. 2. Enclosed is a copy of our evaluation for this topic.
You are requested to examine the fatts qP.on which the staff has based its evaluation and respond either by confinnfng that the facts are
. correct, or by 1denti fyf ng errors and supplying the corrected informa-tion.
We encourage you to supply any other material that might affect the staff's eval uatfon of these topics or be s1gn1ffcant in the integrated.
assessment of your facility.
Your response 1s requested within 30 days of receipt of this letter. If no response is received within that t1me, we will assume that you have
- no comments or corrections.
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Enclosure:
As stated cc w/enclosure:
See next page
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Sincerely,
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Paul O'Connor,- Project f"anagerf c,. s4o./fy Operating Reactors Bran6h, No.* 5 I
Division of Licensing G* Cw~ :N~.
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- -~UNl"f'ED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON. D. C. 20555 Mr. L. DelGeorge Director of Nuclear Licensing Commonwealth Edison Company Post Office Box 767 Chicago, Illinois 60690
Dear Mr. DelGeorge:
February 9, 1982
SUBJECT:
SEP SAFETY TOPIC II-4.E, DAM INTEGRITY DRESDEN NUCLEAR POWER STATION UNIT NO. 2 We have completed our review of the subject topic for Dresden Nuclear Power Station Unit No. 2.
Enclosed is a copy of our evaluation for this topic.
You are requested to examine the facts upon which the staff has based its evaluation and respond either by confirming that the facts are correct, or by identifying errors and supplying the corrected informa-tion.
We encourage you to supply any other mater1al that might affect the staff 1 s evaluation of these topics or be significant in the integr?ted ass*essment of your faci 1 i ty.
Your response is requested within 30 days of receipt of this letter. If*
~o response is received within that time, we will ass~me that you have no comments or corrections.
Enclosure:
As stated cc w/enclosure:
See next page Sincerely, Paul QtConnor, Ptoj~ct Manager Operating Reactors Branch No, 5 Division of Licensing
_t1r. l". DelGeorge cc Isham, Lincoln & Beale Counselors at Law
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.. One First National Plaza, 42nd Floo*r Chicago, Illinois 60603 Mr *. B. B. St.ephenson Plant Superintendent Dresden Nuclear Power Station Rural Route.#1 Morris, Illinois 60450 Natural Resources Defense Council 917 15th Street, N. W.
Washington, D. c.
20005
- u. S. Nuclear Regulatory Commission Resident Insp~ctors Office Dresden Station RR #1 Morris, Illinois 60450
- Mary Jo Murray Assistant Attorney General Environmental Control Division 188 W. Randolph Street
. Suite 2315 Chicago, Illinois 60601 Morri-s Public Library 604 Liberty Street Morris, Illinois 50451 Chairman
- Board of Supervisors of Grundy County Grundy County Courthouse Morris, Illinoi.s 60450
- John F. Wolf, Esquire 3409 Shepherd Streer Chevy Chase, Maryland 20015 Dr. Linda W. Little 500 Hermitage Drive Raleigh, North Carolina 27612
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Illin9is Department of Nuclear Safety 1035 Outer Park*Drive, 5th Floor Springfield, Illinois.62704 U. s.. Environmental Protection Agency Federal Activities Branch Region V Office ATTN:
Regional Radiation Represeniative 230 South Dearborn Street Chicago, Illinois 60604 Dr. Forrest J. Remick
- 305 East Hamilton Avenue State College, ~ennsylvania.16'801 The Honorab 1 e T:Qm Corcoran
- United States House of Representatives
- Washington, D. C.
20515 Robert H.
E~ge1 ken, Regional Admi n.
Nuclear Regulatory Commission Region V Office of Inspection & Enforcement 1450 Mari a Lane Walnut Creek, California -94596
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SYSTEMATIC EVALUATION PROGRAM TOPIC II-4.E DRESDEN #2
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TOPIC:
II-4. E, Dam Integrity.
I.
INTRODUCTION The purpose of this safety topic is to review the stability of all earth, rock or earth and rockfill embankments and dams used for impounding cooling water required for operation and safe shutdown of the plant.
. II.
REVIEW CRITERIA
- 1.
10 CFR 50, Appendix A - Criterion 1, 2 and 44
- 2.
10 CFR 100, Appendix A - Seismic and Geologic Siting triteria for Nµclear Power Plants III.
RELATED SAFETY TOPICS AND INTERFACES SEP Safety Topics II-4.D, Stability of Slopes, II-4.F, Settlement of Foundations and Buried Equipment and 11-3.B, Flooding Potential and Protection Requirement.
IV.
EVALUATION The source of cooling water for Dresden Unit 2 is the pool impounded~
behind the concrete Dresden Lock and Dam located on the Illinois River.
. Plant cooling water is obtained through an intake c~nal above this dam, with a water intake on the Kankakee River.
The water is heated in. the plant and then flows through a discharge canal into the Illinois RfVer at a discharge outlet which is above the dam and just downst~eam of the confluence of the Kankakee and D~s Plaines* Rivers.
The plant is designed so that it can be safely shutdown in the event of failure of the Dresden Dam and loss of the pool impounded by the dam.
There is enough water impounded, 9,000,000 gallons (Reference l), in the intake and discharge canals below their high point elevation, to allow a safe shutdown of Dresden Units 2&j.*
As* far as the dam safety is concerned, the Dresden Dam, a concrete gravity dam, is maintained and operated by the U.S. Army Corps of Engineers, as part of the Illinois Waterway system.
In addition, this dam is inspected under the National Dam Inspection Act (References 2 and 3), for the purpose of protecting.human life and property.
- The basis of acceptability of this statement will be addressed in SEP
. Safety Topic II-3.C, Safety Related Water Supply (Ultimate Heat Sink).
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..,,. Under this Act's guid_elines, the dam has a "high hazard potential" classification, because of the potential for loss of life and great economic loss should failure occur.
This act requires that the dam be inspected and, if deficiencies are found, that they be reported and repairs implemented to maintain the dam in a safe condition.
relative to human life and property.
V.
CONCLUSION Based on the evaluation discussed above, the staff concluded:
- 1) *The failure of the Dresden Lock and Dam will not adversely affect the safety of the plant and
- 2)
The dam need not therefore be cl ass.ifi ed as Category 1.
VI.
REFERENCES
- 1.
Dresden 2&3 FSAR, Amendment 9/10, Response to NRC Question l.F.
- 2.
National Dam Inspection Act, Public Law 92-367, August 8, 1972.
- 3.
Recommended Guidelines for Safety Inspection of Dams, Department of the Army, Offices of the Chief of Engineers, Federal Register, Volume 39, No. 168, Augusi 24, 1974.
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