ML20129H418
| ML20129H418 | |
| Person / Time | |
|---|---|
| Site: | Prairie Island  |
| Issue date: | 10/28/1996 |
| From: | Wetzel B NRC (Affiliation Not Assigned) |
| To: | Richard Anderson NORTHERN STATES POWER CO. |
| References | |
| GL-92-01, GL-92-1, TAC-M92719, TAC-M92720, NUDOCS 9611050225 | |
| Download: ML20129H418 (4) | |
Text
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i UNITED STATES g
j NUCLEAR REGULATORY COMMISSION t
wasHawoTow. o.c. sones.aooi October 28, 1996 Mr. Roger 0. Anderson, Director Licensing and Management Issues Northern States Power Company 414 Nicollet Mall Minneapolis, MN 55401
SUBJECT:
CLOSE0VT FOR NORTHERN STATES POWER COMPANY'S RESPONSE TO GENERIC LETTER 92-01, REVISION 1, SUPPLEMENT 1 FOR THE PRAIRIE ISLAND UNITS 1 AND 2 NUCLEAR GENERATING PLANTS (TAC NOS. M92719 AND M92720)
Dear Mr. Anderson:
On May 19, 1995, the NRC issued Generic Letter 92-01, Revision 1, Supplement 1 (GL 92-01, Rev.1, Supp.1), " Reactor Vessel Structural Integrity."
In GL 92-01, Rev.1, Supp.1, the NRC requested that nuclear licensees perform a review of their reactor pressure vessel structural integrity assessments in order "to ident"y, collect, and report any new data pertinent to [the) analysis of i structural integrity of their reactor pressure vessels y
(RPVs) and tc isess the impact of that data on their RPV integrity analyses relative to the requirements of Section E0.60 of Title 10 of the Code of federal Regulatfons (10 CFR 50.60), 10 CFR 50.61, 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 pressure-temperature (P-T) limits."
More specifically, in GL 92-01, Rev.1, Supp.1, the HRC requested that addressees provide the following information in their responses:
(1) 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 data base is considered complete as previously submitted; (2) an assessment of any change in best-estimate chemistry based on consideration of all relevant data; (3) a determination of the need for the use of the ratio procedure in accordance with the established P9sition 2.1 of Regulatory Guide (RG) 1.99, Revision 2, for those licensees that use surveillance data to provide a basis for the RPV integrity evaluation; and (4) a written report providing any newly acquired data as specified above and (1) the results of any necessary revisions to the evaluations of RPV integrity in accordance with the requirements of 10 CFR 50.60, 10 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 submitted evaluations remain valid.
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050063 9611050225 961028 yDR ADOCK 05000282 PDR
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R.O. Anderson.
Revised evaluations and certifications were to include consideration of l
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.
l The NRC staff has noted that NSP submitted tha information requested in l
Reporting Item (1) on August 17, 1995, and requested in Reporting Items (2) -
(4) on November 17, 1995. Since. NSP has submitted the requested information and has indicated that the previously submitted evaluations remain valid, the staff considers the RPV integrity data for the Prairie Island Units 1 and 2 Nuclear Generating Plants to be complete at this time. The staff therefore concludes that no additional information regarding the structural integrity of l
the RPV at the Prairie Island Units 1 and 2 Nuclear Generating Plants is available at this time, and that your efforts regarding GL 92-01, Rev.1, Supp. I are complete. This completes all actions related to the referenced l
TAC Number.
Thank you for your cooperation.
Sincerely, as0Q)
Beth A. Wetzel, Pr ject Manager Project Directorate 111-1 l
Division of Reactor Projects III/IV Office of Nuclear Reactor Regulation i
l Docket Nos. 50-282 and 50-306 cc:
See next page
l
- I Mr. Roger O. Anderson, Director Prairie Island Nuclear Generating Northern States Power Company Plant l
l cc:
J. E. Silberg, Esquire Shaw, Pittman, Potts and Trowbridge 2300 N Street, N. W.
Washington DC 20037 Site General Manager Prairie Island Nuclear Generating Plant Northern States Power Company 1717 Wakonade Drive East Welch, Minnesota 55089 Adonis A. Nebiett Assistant Attorney General Office of the Attorney General 455 Minnesota Street Suite 900 St. Paul, Minnesota 55101-2127 U.S. Nuclear Regulatory Commission Resident Inspector's Office 1719 Wakon=de Drive East Welch, Minnesota 55089-9642 Regional Administrator, Region III U.S. Nuclear Regulatory Commission 801 Warrenville Road Lisle, Illinois 60532-4351 Mr. Jeff Cole, Auditor / Treasurer Goodhue County Courthouse Box 408 Red Wing, Minnesota 55066-0408 Kris Sanda, Commissioner Department of Public Service 121 Seventh Place East Suite 200 St. Paul, Minnesota 55101-2145 Site Licensing Prairie Island Nuclear Generating Plant Northern States Power Company 1717 Wakonade Drive East Welch, Minnesota 55089 uaa nns
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l0 R.0. Anderson October 28, 1996 Revised evaluations and certifications 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.
1 The NRC steff has noted that NSP submitted the information requested in Reporting Item (1) on August 17, 1995, and requested in Reporting Items (2) -
i l
(4) on November 17, 1995.
Since NSP has submitted the requested information l
and has indicated that the previously submitted evaluations remain valid, the staff considers the RPV integrity data for the Prairie Island Units 1 and 2 Nuclear Generating Plants to be complete at this time. The staff therefore concludes that no additional information regarding the structural integrity of the RPV at the Prairie Island Units 1 and 2 Nuclear Generating Plants is available at this time, and that your efforts regarding GL 92-01, Rev. 1, Supp. I are complete. This completes all actions related to the referenced TAC Number.
Thank you for your cooperation.
Sincerely, Original signed by Beth A. Wetzel, Project Manager Project Directorate 111-1 Division of Reactor Projects III/IV Office of Nuclear Reactor Regulation Docket Nos. 50-282 and 50-306 cc:
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Docket File.
PUBLIC PD31 Reading JRoe EAdensam (EGA1)
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"C" = Copy t ut attachment / enclosure *(* = Copy with attachment / enclosure
'N' = fio copy OFFICE PM:PD31 [ E LA:PD31 l & DyPD31 p/
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l NAME BWetzel fqW CJamerso M4Hannon \\
l DATE 10//M/96~
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