ML17180B485
| ML17180B485 | |
| Person / Time | |
|---|---|
| Site: | Dresden  |
| Issue date: | 12/06/1995 |
| From: | Stang J NRC (Affiliation Not Assigned) |
| To: | Farrar D COMMONWEALTH EDISON CO. |
| Shared Package | |
| ML17180B486 | List: |
| References | |
| TAC-M91301, TAC-M91302, TAC-M93584, NUDOCS 9512120374 | |
| Download: ML17180B485 (3) | |
Text
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UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555--0001 Mr. D. L. Farrar Manager, Nuclear Regulatory Services COlllllOnwealth Edison Company Executive Towers West III 1400 Opus Place, Suite 500 Downers Grove, IL 60515 December 6, 1995
SUBJECT:
SAFETY EVALUATION REGARDING CORE SHROUD REPAIR - DRESDEN NUCLEAR POWER STATION, UNITS 2 AND 3 (TAC NOS. M91301, M91302 AND M93584)
Dear Mr. Farrar:
On July 25, 1994, the staff issued Generic Letter (GL) 94-03 concerning core shroud cracking in boiling water reactors (BWRs).
By letter dated March 30,-~
1995, Connonwealth Edison Company (ComEd, the licensee) responded to the generic letter and submitted the inspection plan for the Dresden Nuclear Pow*r Station, Unit 2, core shroud (GL 94-03 Item 2.(a)).
By letter dated May 24, 1995, ComEd submitted the design documents for the repair of the Dresden, Units 2 and 3, core shrouds (GL 94-03 Item 2~(b}).
As a result of the review of the licensee's repair design submittal, the staff requested additional information (RAI) on July 26, 1995, and held*telephone discussions with the licensee on August 31, 1995~ The licensee provided its response to the staff's RAI in separate submittals on August 14, September 5, September 25 and October 2, 1995. This response also included the ComEd 10 CFR 50.59 safety evaluation of the core shroud.
The licensee's submittal dated August 28, 1995, provided the final results of the Dresden, Unit 2, core shroud examination.
The proposed core shroud repair has been designed as an alternative to the requirements of the American Society of Mechanical Engineers (ASME). Boiler and Pressure Vessel Code (Code),Section XI.
Pursuant to 10 CFR 50.55a(a)(3)(i),
use of an alternative to the ASME Code requires review and approval of this repair by the NRC staff.
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The staff has reviewed the structural aspects of the proposed repair provided in the licensee's submittals of May 24, July 26, August 14, September 5, September 25 and October 2, 1995.
Our evaluation is provided in the enclosed safety evaluation. Based on a review of the shroud modification hardware from structural, systems, materials, and fabrication considerations, the staff concludes that the proposed modifications of the Dresden, Units 2 and 3, core shroud are acceptable and will not result in any increased risk to the public health and safety.
In accordance with 10 CFR 50.59, ComEd determined that ~o 9512120374 951206 PDR ADOCK 05000237 P
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D. unreviewed safety question will result and no technical specification rev1s1on will be involved.
The staff agrees with this determination and concludes that no license amendment, pursuant to 10 CFR 50.90, is necessary.
This completes our action with respect to the above TACs.
Docket Nos. 50-237, 50-249
Enclosure:
Safety Evaluation cc w/encl:
see next page DISTRIBUTION:
Docket File PUBLIC PDII I-2 R/F J. Roe (JWR)
R. Capra C. Moore J. Stang OGC 0-15 B18 ACRS T-2 E26 P. Hiland C. E. Carpenter Sincerely, John F. Stang, Senior Project Manager Project Directorate III-2 Division of Reactor Projects - III/IV Office of Nuclear Reactor Regulation
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DOCUMENT NAME:
DRESDEN\\DR91301\\.l\\R To receive a co y of t:.iis document, i!'dicate in t~e b,q. "C" = Copy without enclosures "E" = Copy with enclosures "N" = No copy OFFICE I L NAME DATE
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D. L. Farrar Commonwealth Edison Company cc:
Michael I. Miller, Esquire Sidley and Austin One First National Plaza Chicago, Illinois 60603 Site Vice President Dresden Nuclear Power Station 6500 North Dresden Road Morris, Illinois 60450-9765 Station Manager Dresden Nuclear Power Station 6500 North Dresden Road Morris, Illinois 60450-9765 U.S. Nuclear Regulatory Commission Resident Inspectors Office Dresden Station 6500 North Dresden Road Morris, Illinois 60450-9766 Regional Administrator U.S. NRC, Region III 801 Warrenville Road Lisle, Illinois 60532-4351 Illinois Department of Nuclear Safety Office of Nuclear Facility Safety 1035 Outer Park Drive Springfield, Illinois 62704 Chairman Grundy County Board Administration Building 1320 Union Street Morris, Illinois 60450 Document Control Desk-Licensing Commonwealth Edison Company 1400 Opus Place, Suite 400 Downers Grove, Illinois 60515 Dresden Nuclear Power Station Unit Nos. 2 and 3