ML032541159
| ML032541159 | |
| Person / Time | |
|---|---|
| Site: | Prairie Island  |
| Issue date: | 10/03/2003 |
| From: | Anthony Mcmurtray NRC/NRR/DLPM/LPD3 |
| To: | Solymossy J Nuclear Management Co |
| Shared Package | |
| ML032541176 | List: |
| References | |
| IR-00-013 | |
| Download: ML032541159 (5) | |
Text
October 3, 2003 Mr. Joseph M. Solymossy Site Vice President Prairie Island Nuclear Generating Plant Nuclear Management Company, LLC 1717 Wakonade Drive East Welch, MN 55089
SUBJECT:
PRAIRIE ISLAND NUCLEAR GENERATING PLANT, UNITS 1 AND 2 -
ACCIDENT SEQUENCE PRECURSOR ANALYSIS OF NOVEMBER 2000 OPERATIONAL EVENT
Dear Mr. Solymossy:
Enclosed for your information is the accident sequence precursor (ASP) analysis of an operational event which occurred at the Prairie Island Nuclear Generating Plant, Units 1 and 2, in November 2000. This event was reported in Licensee Event Report (LER) 282/306/
2000-003-0, dated November 27, 2000, LER 282/306/2000-004-0, dated December 1, 2000, LER 282/306/2000-004-1, dated March 22, 2001, and U.S. Nuclear Regulatory Commission (NRC) Inspection Report 50-282/306/2000-13, dated February 20, 2001. The results of the ASP analysis indicate that this event is a precursor (i.e., the importance or change in core damage probability (CCDP) >1E-6).
In the past, preliminary versions of all ASP analyses were issued for internal peer review by the NRC staff and for external peer review by the licensee. Comments received from these reviews were then resolved as part of the final analysis. To increase efficiency, we are now issuing the noncontroversial ASP analyses as final documents. In this event, the findings in the ASP analysis (i.e., the CCDP and dominant risk contributors) are consistent with those in the Significance Determination Process (SDP). Since this ASP analysis confirms the results of the final SDP, which has been reviewed by the NRC staff and you, the licensee, the preliminary ASP analysis is being issued as a final product for information only.
The NRC staff is continuing to review the appropriate classification of the ASP analysis within our records management program, considering changes in our practices following the events of September 11, 2001. Pending a final determination, the enclosed analysis has been marked as "Proprietary Information" or "Sensitive Information" in accordance with Section 2.790(d) of Title 10 of the Code of Federal Regulations. Please control the document accordingly (i.e., treat the document as if you had determined that it contained trade secrets and
J. Solymossy commercial or financial information that you considered privileged or confidential). We will inform you if the classification of the document changes as a result of our ongoing assessments.
Please contact me at 301-415-4106 if you have any questions regarding the enclosure.
Sincerely,
/RA/
Anthony McMurtray, Senior Project Manager, Section 1 Project Directorate III Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket Nos. 50-282 and 50-306
Enclosure:
ASP Analysis (Sensitive - Not for Public Disclosure) cc w/o encl: See next page
ML032541159 (Letter)
ML032541171 (Enclosure)
ML032541176 (Package)
OFFICE PDIII-1/PM PDIII-1/LA PDIII-1/SC NAME AMcMurtray RBouling LRaghavan DATE 09/26/03 09/26/03 09/30/03
Prairie Island Nuclear Generating Plant, Units 1 and 2 cc:
Jonathan Rogoff, Esquire General Counsel Nuclear Management Company, LLC 700 First Street Hudson, WI 54016 Manager, Regulatory Affairs Prairie Island Nuclear Generating Plant Nuclear Management Company, LLC 1717 Wakonade Drive East Welch, MN 55089 Manager - Environmental Protection Division Minnesota Attorney Generals Office 445 Minnesota St., Suite 900 St. Paul, MN 55101-2127 U.S. Nuclear Regulatory Commission Resident Inspector's Office 1719 Wakonade Drive East Welch, MN 55089-9642 Regional Administrator, Region III U.S. Nuclear Regulatory Commission 801 Warrenville Road Lisle, IL 60532-4351 Administrator Goodhue County Courthouse Box 408 Red Wing, MN 55066-0408 Commissioner Minnesota Department of Commerce 121 Seventh Place East Suite 200 St. Paul, MN 55101-2145 Tribal Council Prairie Island Indian Community ATTN: Environmental Department 5636 Sturgeon Lake Road Welch, MN 55089 Nuclear Asset Manager Xcel Energy, Inc.
414 Nicollet Mall, R.S. 8 Minneapolis, MN 55401 John Paul Cowan Executive Vice President & Chief Nuclear Officer Nuclear Management Company, LLC 700 First Street Hudson, WI 54016 Mano K. Nazar Senior Vice President Nuclear Management Company, LLC Prairie Island Nuclear Generating Plant 1717 Wakonade Drive East Welch, MN 55089 September 2003