ML17187A934
| ML17187A934 | |
| Person / Time | |
|---|---|
| Site: | Dresden  |
| Issue date: | 04/21/1997 |
| From: | Stang J NRC (Affiliation Not Assigned) |
| To: | Johnson I COMMONWEALTH EDISON CO. |
| References | |
| GL-92-01, GL-92-1, TAC-M92671, TAC-M92672, NUDOCS 9704240147 | |
| Download: ML17187A934 (3) | |
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~o' WASHINGTON, D.C. 20555--0001 April 2I, I997 Ms. Irene Johnson, Acting Manager Nuclear Regulatory Services Co11111onwealth Edison Company Executive Towers West III I400 Opus Pla~e, Suite 500 Downers Grove, IL 605I5 Do:iutd-dv 15° <C.~
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SUBJECT:
- CLOSEOUT FOR *RESPONSE TO GENERIC LETTER 92-0I, REVISION I, SUPPLEMENT I - DRESDEN NUCLEAR POWER STATION, UNITS 2 AND 3 {TAC NOS. M92671 AND M92672)
Dear Ms. Johnson:
On May 19, I995, the NRC issued G~neric Letter 92-01, Revision 1, Supplement 1, "Reactor Vessel Structural Integrity" {GL 92-01).
In GL 92-01, the NRC requested that nuclear licensees perform a review of their reactor pressure vess.el structural integrity assessments in order "to identify, collect, and report any new data pertinent to [the] analysis of [the]
structural integrity of their reactor pressure vessels {RPVs) and to assess the impact of that data on their RPV integrity analyses relative to the
- requirements of Section 50.60 of Title IO of the Code of Federal Regulations
{IO CFR 50.60), IO CFR 50.6I, Appendices.G and H to 10 CFR Part 50 {which encompass pressurized thermal shock (PTS) and upper shelf energy (USE) evaluations), and any potential impact on low temperature overpressure (LTOP) limits or pressur~-temperature (P-T) limits."
More specific~lly, in GL 92-01, the NRC requested that addressees provide the following information in their responses:
(1)
(2)
(3)
(4)
A description of those actions taken or planned to locate all data relevant to the determination of RPV integrity, or an explanation of why the existing database is considered complete as previously submitted; an assessment of any change in best-estimate chemistry based on consideration of all relevant data; a determination of the need for the use of the ratio procedure in accordance with the established Position 2.1 of Regulatory Guide (RG)
I.99, Revision 2, for those licensees that use surveillance data to provide a basis for the RPV integrity evaluation; and a written report providing any newly acquired data as specified above and (I) the results of any necessary revisions to the evaluations of RPV integrity in accordance with the requirements of IO CFR 50.60, IO CFR 50.61, Appendices G and H to 10 CFR Part 50, and any potential impact on the LTOP and P-T limits in the technical specifications, or (2) a certification that previously.su~itted evaluations.remain valid.
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OFFICE NAME DATE Revised evaluations and certificatioris were to include consideration of Position 2.1 of RG 1.99, Revision 2, as applicable, and any new data.
The information in Reporting Item (1) was to be submitted within 90 days of the issuance of the GL.
The information in Reporting Items (2) ~ (4) was to be submitted within 6 months of the issuance of the GL.
The NRC staff has noted that Commonwealth Edison. Company (ComEd) submitted the information requested in *Reporting Item (1) dn August 17, 1995, and requested in Reporting Items (2) ~ (4) on November 17, 1995 and January 17, 1996.
ComEd has provided new RPV data to the staff or has revis~d the RPV Data Sheets for Dresden, Units 2 and 3.
However, ComEtl has indicated in its submittal to GL 92--01, that the revised data does not impact the LTOP and P-T Limits defined in the Dresden, Units 2 and 3, Technical Specifications Qr compliance with the PTS and USE regulations (10 CFR 50.61 and 10 CFR Part 50, Appendices G and H, respectively).
ComEd had, therefore, indicated that the previously submitted evaluations for Dresden, Units 2 and 3, remain valid.
Since ComEd has provided the requested information, the staff is closing out TAC Nos. M92671 and M92672 in regard to Dresden, Units 2 and 3.
However, the staff will review the new RPV data at a later date.
Furthermore, the staff has also noted that the Owners Groups' Reactor Vessel Working Groups activities to establish. a comprehensive RPV information database could yield additional data relevant* to your plant.
These activities are expected to be completed by the summer of 1997.
The staff will open a plant-specitic TAC Number pending its review of the revised RPV data and any additional data that are provided as a result of the Owners Groups' activities.
We request that you provide us with the results of the ongoing Owners Groups' RPV integrity programs relative to your plant.
If you have any questions, please contact me at (301) 415-1345.
Docket Nos. 5()-237,. 50-249 cc:
See next page Sincerely, Origi~al signed by:
John F. Stang, Senior Project Manager Project Directorate III-2 Division of Reactor Projects - III/IV Office of Nuclear Reactor Regulation DISTRIBUTION:
PUBLIC JRoe, JWR JStang ACRS, T2E26 D:PDIII-2 RCAPRA Roe...
04/21 /97 OFFICIAL RECORD COPY Docket File PDII I-2 r /f EAdensam OGC, 015818 W. Kropp," RI II RCapra GDick CMoore DMcDonald, 01404
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I. Johnson 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