ML042860235
| ML042860235 | |
| Person / Time | |
|---|---|
| Site: | Kewaunee  |
| Issue date: | 11/03/2004 |
| From: | Lyon C NRC/NRR/DLPM/LPD3 |
| To: | Coutu T Nuclear Management Co |
| Lyon C, NRR/DLPM, 415-2296 | |
| References | |
| EA-02-204, IR-02-006 | |
| Download: ML042860235 (3) | |
Text
November 3, 2004 Mr. Thomas Coutu Site Vice President Kewaunee Nuclear Power Plant Nuclear Management Company, LLC N490 Highway 42 Kewaunee, WI 54216-9511
SUBJECT:
KEWAUNEE NUCLEAR POWER PLANT - FINAL ACCIDENT SEQUENCE PRECURSOR ANALYSIS OF OCTOBER 2002 OPERATIONAL CONDITION
Dear Mr. Coutu:
Enclosed for your information is the final Accident Sequence Precursor (ASP) analysis of an adverse condition which was identified at Kewaunee in October 2002.
This condition involved the failure to provide a fixed fire suppression system in fire area TU-95B which could result in a postulated fire that would originate in the motor-driven auxiliary feedwater pump B (AFWMDPB) and rapidly propagate throughout the fire area causing loss of control cables in both safe shutdown trains. The turbine-driven auxiliary feedwater pump C (AFWTDPC) control cable would also be affected by the postulated fire, causing loss of function, with no recovery. This is described in Nuclear Regulatory Commission (NRC)
Inspection Report 50-305/02-06.
This condition was determined to be of low to moderate safety significance (White) in accordance with the Significance Determination Process (SDP) as documented in the EA-02-204, dated December 2, 2002, Final Significance Determination for a WHITE Finding and Notice of Violation, NRC Inspection Report 50-305/02-06. The results of the final ASP analysis indicate that this condition resulted in an increase in core damage probability (CDP) of 1 x 10-5, which is consistent with the results of the SDP and determines that this condition is an accident precursor (i.e., a condition which results in a change in conditional core damage probability (CCDP) > 1 x 10-6).
For the October 2002 condition, the findings in the ASP analysis (change in CCDP and dominant risk contributors) are consistent with those in the SDP. Since this ASP analysis confirms the results of the final significance determination, which has been reviewed by the NRC staff and Nuclear Management Company, LLC, it is being issued as a final product for information only. 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.
The NRC staff is continuing to review the appropriate classification of these documents within our records management, considering changes in our practices following the events of
T. Coutu September 11, 2001. Using our interim guidance, the enclosed analysis have been marked as Sensitive Information in accordance with Section 2.390 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 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.
Therefore, the staff has not made it publicly available. Please control the document accordingly. We will inform you if the classification of the document changes as a result of our ongoing assessments. If you have any questions regarding the analysis, please contact me at 301-415-2296.
Note that public access to ADAMS has been temporarily suspended so that security reviews of publicly available documents may be performed and potentially sensitive information removed.
Please check the NRC Web site for updates on the resumption of ADAMS access.
Sincerely,
/RA/
Carl F. Lyon, Project Manager, Section 1 Project Directorate III Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket No. 50-305
Enclosure:
As stated (Sensitive - Not for Public Disclosure) cc w/o encl: See next page
T. Coutu September 11, 2001. Using our interim guidance, the enclosed analysis have been marked as Sensitive Information in accordance with Section 2.390 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 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.
Therefore, the staff has not made it publicly available. Please control the document accordingly. We will inform you if the classification of the document changes as a result of our ongoing assessments. If you have any questions regarding the analysis, please contact me at 301-415-2296.
Note that public access to ADAMS has been temporarily suspended so that security reviews of publicly available documents may be performed and potentially sensitive information removed.
Please check the NRC Web site for updates on the resumption of ADAMS access.
Sincerely,
/RA/
Carl F. Lyon, Project Manager, Section 1 Project Directorate III Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket No. 50-305
Enclosure:
As stated (Sensitive - Not for Public Disclosure) cc w/o encl: See next page DISTRIBUTION (W/O ENCLOSURE):
PUBLIC OGC THarris GDick PD III-1 R/F FLyon ACRS DMarksberry RMatthews LRaghavan SReynolds, RIII NRR Mailroom (YT#020040200)
ACCESSION NO.: ML042860235 Package Accession No.: ML043080378 (NON-PUBLIC)
Enclosure Accession No.: ML042360193 (NON-PUBLIC)
OFFICE PDIII-1/PM PDIII-1/LA PDIII-1/SC NAME FLyon THarris LRaghavan DATE 11/03/04 11/03/04 11/03/04 OFFICIAL RECORD COPY
Kewaunee Nuclear Power Plant cc:
John Paul Cowan David Zellner Executive Vice President & Chairman - Town of Carlton Chief Nuclear Officer N2164 County B Nuclear Management Company, LLC Kewaunee, WI 54216 700 First Street Hudson, MI 54016 Mr. Jeffery Kitsembel Electric Division Plant Manager Public Service Commission of Wisconsin Kewaunee Nuclear Power Plant PO Box 7854 N490 Highway 42 Madison, WI 53707-7854 Kewaunee, WI 54216-9511 Manager, Regulatory Affairs Kewaunee Nuclear Power Plant N490 Highway 42 Kewaunee, WI 54216-9511 David Molzahn Nuclear Asset Manager Wisconsin Public Service Corporation 600 N. Adams Street Green Bay, WI 54307-9002 Resident Inspectors Office U. S. Nuclear Regulatory Commission N490 Hwy 42 Kewaunee, WI 54216-9511 Regional Administrator, Region III U. S. Nuclear Regulatory Commission 2443 Warrenville Road, Suite 210 Lisle, IL 60532-4352 Jonathan Rogoff Vice President, Counsel & Secretary Nuclear Management Company, LLC 700 First Street Hudson, WI 54016 Larry L. Weyers Chairman, President and CEO Wisconsin Public Service Corporation 600 North Adams Street Green Bay, WI 54307-9002