ML20207B584
| ML20207B584 | |
| Person / Time | |
|---|---|
| Site: | Prairie Island  |
| Issue date: | 05/26/1999 |
| From: | Thomas C NRC (Affiliation Not Assigned) |
| To: | Richard Anderson NORTHERN STATES POWER CO. |
| Shared Package | |
| ML20207B589 | List: |
| References | |
| TAC-MA5295, NUDOCS 9906020015 | |
| Download: ML20207B584 (3) | |
Text
May 26,1999 Mr. Roger O. And:rson, Dir:ctor Licensing and Mrnigem:nt issu:s Northern States Power Company 9
414 Nicollet Mall Minneapolis, Minnesota 55401
SUBJECT:
PRAIRIE ISLAND NUCLEAR GENERATING PLANT, UNIT 1 - EVALUATION OF PROPOSED ALTERNATIVE TO THE ASME CODE SURFACE EXAMINATION OF PART-LENGTH CONTROL ROD DRIVE MECHANISM REACTOR VESSEL HEAD PENETRATION SEAL WELDS (TAC NO. MA5295)
Dear Mr. Anderson:
By letter dated April 12,1999, you proposed an alternative to the surface examination requirements of paragraph N-518.4 of the 1968 American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code. The proposed alternative would be used in conjunction with four nonstructural seal welds on threaded caps for the Unit i reactor vessel head penetrations for the part-length control rod drive mechanisms (CRDMs) after the CRDMs are removed.
The staff has completed its review of your request and concludes that the proposed alternative to the ASME Code for surface examination of the seal welds on threaded caps for the reactor vessel head penetrations fo't the part-length CRDMs will provide an acceptable level of quality and safety. The proposed attemative inspection is authr.,rized pursuant to 10 CFR 50.55a(s)(3)(l) and is acceptable for the four nonstructural seal welds on threaded caps for the Unit i reactor vessel head penetrations for the part-length CRDMs.
I The safety evaluation supporting the staff's finding is enclosed. If you have any questions concerning this action please contact T. J. Kim of my staff at (301) 415-1392.
Sincerely, Original Signed By Cecil O. Thomas, Director Project Directorate lll Division of Licensing Project Management Office of Nuclear Reactor Regulation
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Docket Nos. 50-282 & 50-306 t
Enclosure:
Safety Evaluation Qg cc w/ encl: See next page DISTRIBUTION: See attached page DOCUMENT NAME: G:\\PD3-1\\WPDOCS\\ PRAIRIE \\RLFA5295.WPD
- See previous concurrences Ta voceive a copy of this document, indicate in the bor "C" = Copw without E.- U-.a se "E" a Copy with.w
...U asure "N" = No copy l OFFICE PM:PD3-1 lE LA:PD3-1 lE C:EMCB l
OGC SC:PD3-1 D:P,D3 lA/
lNAME TJKim d/c THarris*
WBateman*
SUttal*
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J2ffgad lDATE 05/24 /99 05/11 /99 05/10/99 05/21 /99 05/25 /99 65ffe99 OFFICIAL RECORD COPY l
990602oo15 990526 PDR ADOCK 0500o282 I
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_ g Mr. Roger O. Anderson, Director Prairie Island Nuclear Generating Northem States Power Company Plant I
cc:
J. E. Silberg, Esquire Site Licensing Shaw, Pittman, Potts and Trowbridge Prairie Island Nuclear Generating 2300 N Street, N. W.
Plant Washington DC 20037 Northem States Power Company 1717 Wakonade Drive East Plant Manager Welch, Minnesota S5089 Prairie Island Nuclear Generating q
Plant Tribal Council Northern States Power Company Prairie island Indian Community 1717 Wakonade Drive East ATTN: Environmental Department Welch, Minnesota 55089 5636 Sturgeon Lake Road Welch, Minnesota 55089 Adonis A. Nebiett Assistant Attomey General Site General Manager Office of the Attorney General Prairie Island Nuclear Generating 455 Minnesota Street Plant Suite 900 Northem States Power Company St. Paul, Minnesota 55101-2127 1717 Wakonade Drive East Welch, Minnesota 55089 U.S. Nuclear Regulatory Commission Resident inspector's Office 1719 Wakonade Drive East Welch, Minnesota 55089-9642 Regional Administrator, Region ill U.S. Nuclear Regulatory Commission 801 Warrenville Road Lisle, lilinois 605324 351 Mr. Stephen Bloom, Administrator Goodhue County Courthouse Box 408 Red Wing, Minnesota 55066-0408 Commissioner Department of Public Service 121 Seventh Place East Suite 200 St. Paul, Minnesota 55101-2145 4
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