ML092400075

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Modification of a Request for Additional Information Associated with Supplemental Responses to Generic Letter 2004-02 (MC4679 and MC4680)
ML092400075
Person / Time
Site: Cook  
Issue date: 08/31/2009
From: Beltz T
Plant Licensing Branch III
To: Jensen J
Indiana Michigan Power Co
beltz T, NRR/DORL/LPL3-1, 301-415-3049
References
GL-04-002, TAC MC4679, TAC MC4680
Download: ML092400075 (3)


Text

UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 August 31, 2009 Mr. Joseph N. Jensen Senior Vice President and Chief Nuclear Officer Indiana Michigan Power Company Nuclear Generation Group One Cook Place Bridgman, MI 49106

SUBJECT:

DONALD C. COOK NUCLEAR PLANT, UNITS 1 AND 2 - MODIFICATION OF A REQUEST FOR ADDITIONAL INFORMATION (RAI) ASSOCIATED WITH SUPPLEMENTAL RESPONSES TO GENERIC LETTER (GL) 2004-02 (TAC NOS. MC4679 AND MC4680)

Dear Mr. Jensen:

On August 26, 2009, a public meeting via conference call (Agencywide Documents Access and Management System (ADAMS) Accession No. ML092250002) was held between staff of the U.S.

Nuclear Regulatory Commission (NRC) and the Donald C. Cook Nuclear Plant. The meeting was held to discuss RAls previously transmitted in a June 18, 2009, letter (ADAMS Accession No. ML091490421) associated with your staffs supplemental responses to GL 2004-02, "Potential Impact of Debris Blockage on Emergency Recirculation During Design Basis Accidents at Pressurized Water Reactors."

During the meeting, it was determined that RAI Question 21 required modification to provide additional clarification. The NRC staff modified the RAI as follows:

Please provide justification that the flow rate assumed at the main strainer during chemical effects testing was bounding with respect to the condition that could occur in the plant. Because of the amount of debris assumed at the main strainer, the corresponding flow assumed during testing may have been lower than could occur in the plant. A lower flow rate can affect the head loss value attained during testing and thus affect the bump up factor determined by the chemical effects head loss test.

Mr. Joe Waters and Mr. Paul Leonard of your staff stated that they understood the intent of the proposed RAI and agreed that it could be formally issued.

Please respond to this RAI as part of your response to the RAls in the June 18, 2009, letter.

J.Jensen

- 2 Feel free to contact me at (301) 415-3049 if you need further clarification or have any comments.

Terry A. Beltz, Senior Project Manager Plant Licensing Branch 111-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-315 and 50-316 cc: Distribution via Listserv

ML092400075 OFFICE NRR/LPL3-1/PM NRR/LPL3-1/LA t\\lRR/SSIB/BC NRR/LPL3-1/BC NAME TBeltz THarris MScott LJames DATE 08/28/09 08/28/09 08/28/09 08/31/09