L-PI-11-023, Reinstatement of Licensee Event Reports Associated with Flooding Scenarios

Reinstatement of Licensee Event Reports Associated with Flooding Scenarios

ML110910152
Person / Time
Site:	Prairie Island
Issue date:	03/31/2011
From:	Schimmel M Northern States Power Co, Xcel Energy
To:	Office of Nuclear Reactor Regulation, Document Control Desk
References
L-PI-11-023 LER 01-09-006
Download: ML110910152 (2)

Text

MAR 3 1 2011 L-PI-I 1-023 10 CFR 50.73 U S Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555-0001 Prairie Island Nuclear Generating Plant Units 1 and 2 Dockets 50-282 and 50-306 License Nos. DPR-42 and DPR-60 I

Reinstatement of Licensee Event Reports Associated with Floodins Scenarios

References:

1. Northern States Power Company, a Minnesota corporation (NSPM),

doing business as Xcel Energy, letter to NRC, "LER 1-09-06, Unanalyzed Condition Due to Potential Safety System Susceptibility to Turbine Building Flooding Due to a Postulated High Energy Line Break, Supplement 1", dated April 8, 2010 (ADAMS Accession ML100980611).

2. NSPM letter to NRC, "LER 50-282t2010-003-00, Postulated Flooding of Battery Rooms Due To Inadequate Battery Room Door Threshold Seals", dated August 9,2010 (ADAMS Accession ML102220147).

3. NSPM letter to NRC, "Cancellation of Licensee Event Reports Associated with Flooding Scenarios", dated December 2, 2010 (ADAMS Accession MLI 03370277).

4. NRC Office of Nuclear Reactor Regulation memorandum to NRC Region Ill Division of Reactor Projects, "Task Interface Agreement (TIA) - Evaluation of Flooding Licensing Basis at Prairie Island Nuclear Generating Plant (PINGP) (TIA 201 1-007)11,dated January 28, 2011 (ADAMS Accession MLI 10240359).

The purpose of this letter is to retract the previous cancellation of Prairie Island Nuclear Generating Plant (PINGP) Licensee Event Report (LER) 1-09-06 (Reference I ) and LER 50-28212010-003-00 (Reference 2) as reported to the NRC in the letter "Cancellation of Licensee Event Reports Associated with Flooding Scenarios" (Reference 3). The cancellations were based on the position that the flooding scenario reported in these LERs was not required to be analyzed per the PINGP licensing basis.

Licensing documentation related to this issue was discussed at the Regulatory Conference conducted at the NRC Region Ill on July 13, 2010.

NRC TIA 2011-007 (Reference 4) concludes that the flooding scenarios are required to be analyzed. Thus, the conditions that were reported in LER 1-09-06 and LER 50-28212010-003-00 do represent conditions that require reporting to the NRC.

1717 Wakonade Drive East Welch, Minnesota 55089-9642 Telephone: 651.388.1 121

Document Control Desk Page 2 Both LER 1-09-06 (Reference I) and LER 50-282/2010-003-0a (Referen@@ 2) should no longer be considered cancellad. Both CERs will be supplemented to provide additional information. The supplements are scheduled to be provided to the NRC by April 8, 201 1.

If you have questions regarding this submittal, please contact Jon Anderson at 651-388-1 121.

Summary of Commitments This letter contains no new commitments and no revisions to existing commitments.

Mark A. Schimmel Site Vice President, Prairie Island Nuclear Generating Plant Northern States Power Company - Minnesota cc: Administrator, Region Ill, USNRC Project Manager, PINGP, USNRC Resident Inspector, PINGP, USNRC Department of Commerce, State of Minnesota