ML090830615

Email Response to Request for Additional Information Re Relief Request (MD8551)

ML090830615
Person / Time
Site:	Callaway
Issue date:	02/03/2009
From:	Elwood T Ameren Corp, Union Electric Co
To:	Thadani M Plant Licensing Branch IV
Thadani M
References
TAC MD8551
Download: ML090830615 (3)

Text

From: Elwood, Thomas B [TElwood@ameren.com]

Sent: Tuesday, February 03, 2009 7:52 PM To: Mohan Thadani Cc: Maglio, Scott A; Hoehn, Michael G

Subject:

RE: Response to NRC RAI re Relief Request for Code Classification of Piping Connected to Pressurizer Vapor Space Attachments: RAI Response (Follow-up).doc Mohan -

In response to this e-mail from you last week, I am forwarding a follow-up response from our Engineering ISI group. (See attached.)

If this follow-up response is not sufficient, I suggest we schedule a phone call to further discuss the reviewers concern. Please let me know if or when you and your reviewer would like to have such a call.

- Tom Elwood From: Mohan Thadani [1]

Sent: Tuesday, January 27, 2009 2:57 PM To: Elwood, Thomas B; Maglio, Scott A

Subject:

RE: Response to NRC RAI re Relief Request for Code Classification of Piping Connected to Pressurizer Vapor Space Scott/Tom:

In the email below, the NRC staff reviewer says that you have not provided adequate justification for not performing Class I fatigue analysis. Could you please provide an adequate justification, so that the review can proceed to completion.

Thank you for your cooperation.

Mohan C Thadani Senior Project Manager Plant Licensing Branch IV Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation (301) 415-1476 Mohan.Thadani@nrc.gov Mohan:

Sorry this took so long.

The response is not adequate. It isn't clear what is the significance of considering the 1-1/2 x 3/4 reducer a fitting, as far as ASME Class 1 fatigue analysis is concerned. If the 1-1/2 end of the reducer is attached to ASME Class 1 piping, this end is not exempted from a Class 1 fatigue analysis, even though the 3/4 end is exempted. They have not provided adequate justification for not doing the Class 1 fatigue analysis of the 1-1/2 end.

Thanks.

Mark.

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Subject:

RE: Response to NRC RAI re Relief Request for Code Classification of Piping Connected to Pressurizer Vapor Space Sent Date: 2/3/2009 7:51:52 PM Received Date: 2/3/2009 7:51:52 PM From: Elwood, Thomas B Created By: TElwood@ameren.com Recipients:

Mohan.Thadani@nrc.gov (Mohan Thadani)

Tracking Status: None SMaglio@ameren.com (Maglio, Scott A)

Tracking Status: None MHoehn@ameren.com (Hoehn, Michael G)

Tracking Status: None

Post Office:

exchgob7.corp.dir.ameren.com Files Size Date & Time MESSAGE 246305 2/3/2009 RAI Response (Follow-up).doc 227136 Options Expiration Date:

Priority: olImportanceNormal ReplyRequested: False Return Notification: False Sensitivity: olNormal Recipients received: