ML092870211

Revised Questions 4, 6, 7, and 12 of Formal RAI Dated 08/14/2009 GL 2004-02

ML092870211
Person / Time
Site:	Kewaunee
Issue date:	10/14/2009
From:	Tam P S Plant Licensing Branch III
To:	Breene T L, Gadzala J, Sly C D Dominion Energy Kewaunee
Tam P S
References
GL-04-002, TAC MC4691
Download: ML092870211 (2)

Text

Accession No. ML092870211

From: Tam, Peter Sent: Wednesday, October 14, 2009 9:47 AM To: 'Jack Gadzala'; 'Craig D Sly'; 'Thomas Breene (thomas.l.breene@dom.com)' Cc: Bailey, Stewart; Lehning, John

Subject:

Kewaunee - Revised Questions 4, 6, 7, and 12 of the 8/14/09 RAI (TAC MC4691) Jack: In the September 15, 2009, meeting by telephone conference, the NRC staff agreed to combine and modify Questions 4, 6, 7, and 12 of the formal RAI dated 8/14/2009 regarding GL 2004-02. Following is the result. When you respond to the 8/14/09 RAI, please refer to the following as "Revised Questions 5, 6, 7, and 12." Revised Questions 5, 6, 7, and 12 Please provide the following information regarding debris generation, debris transport, and erosion of debris so that the NRC staff can verify that the amounts and size distribution of debris added to the strainer test were appropriate. Please provide this information for fiberglass, TempMat, and Thermobestos.

a. The amount of each debris type generated by the limiting break(s), including the size categorization of the debris as it is initially generated by the LOCA blowdown. Include the bases for this information, such as approved guidance or test data.

b. The amounts of TempMat, fiberglass pipe cover, and Thermobestos that are considered to erode into fine debris over the entire sump mission time and the basis for the amounts provided. Include information regarding how the initial size distribution of the debris affected the erosion results for each type of debris.

c. Describe how debris that was considered to reach the strainer by the transport calculation and was added to the head loss test flume, but settled prior to reaching the strainer, was treated with respect to erosion. Did the strainer test include a sufficient quantity of fine debris to account for this source? Debris of interest includes Thermobestos, fiberglass, and TempMat. If a sufficient quantity of fine debris to account for the eroded fines from these components was not added to the test, provide a justification for not doing so or show that the test was not affected non-conservatively by this issue. d. The amount of each debris type added to the head loss test broken down into the size components fine, small, large, intact. Please include a description of what each debris component represents.

e. The scaling factor used during strainer testing and the basis for this factor.

Peter S. Tam , Senior Project Manager Plant Licensing Branch III-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Tel. 301-415-1451 E-mail Properties Mail Envelope Properties (0A64B42AAA8FD4418CE1EB5240A6FED1026AB0872D)

Subject:

Kewaunee - Revised Questions 4, 6, 7, and 12 of the 8/14/09 RAI (TAC MC4691)

Sent Date: 10/13/2009 5:54:51 PM Received Date: 10/14/2009 9:46:00 AM From: Tam, Peter

Created By: Peter.Tam@nrc.gov

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jack.gadzala@dom.com ('Jack Gadzala')

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Tracking Status: None thomas.l.breene@dom.com ('Thomas Breene (thomas.l.breene@dom.com)') Tracking Status: None Stewart.Bailey@nrc.gov (Bailey, Stewart)

Tracking Status: None John.Lehning@nrc.gov (Lehning, John)

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