ML082950795

Request for Additional Information, Additional Draft RAI Questions on X/Q Values Proposed Control Room Habitability Amendment

ML082950795
Person / Time
Site:	Kewaunee
Issue date:	10/21/2008
From:	Tam P Plant Licensing Branch III
To:	Gadzala J, Sly C Dominion Energy Kewaunee
Tam P
References
TAC MD6773
Download: ML082950795 (2)

Text

Accession No. ML082950795 From: Peter Tam Sent: Tuesday, October 21, 2008 4:07 PM To: Jack Gadzala (jack.gadzala@dom.com); Craig Sly (craig.d.sly@dom.com)

Cc: Robert Taylor; Aleem Boatright; Leta Brown

Subject:

Kewaunee - Additional Set of Draft RAI re. X/Q Values for Control Room Habitability LAR (TAC MD6773)

Craig, Jack By e-mail dated 9/19/08 (ADAMS Accession No. ML082630604) I conveyed to you a set of draft RAI on this issue. We held a conference call on 9/23/08 to discuss that set of draft RAI. Based on what we heard in the conference call, our reviewer Leta Brown sent the following additional draft RAI questions:

The NRC staff acknowledges that the Kewaunee control room atmospheric dispersion factor

(/Q value) of 2.93 x10-3 sec/m3 used in the September 14, 2007 (current) license amendment request (LAR) was previously approved. Information provided by letters dated February 28, 1989, and September 13, 2002, in support of prior LARs respectively state that the /Q value was calculated using the Murphy-Campe methodology and that the /Q value bounds all release points analyzed in support of the March 17, 2002 alternative source term license amendment request. What reference documentation discusses the inputs, assumptions, and calculations that demonstrate that this /Q value is bounding? If such documentation is not available, where is input information available to enable the NRC staff to make confirmatory calculations for all source-receptor pairs that could be associated with the current LAR using either the Murphy-Campe or ARCON96 methodology discussed in Regulatory Guide 1.194, Atmospheric Relative Concentrations for Control Room Radiological Habitability Assessments at Nuclear Power Plants?

Please set up a conference call with me for the NRC staff to discuss the above with your staff. The sole purpose of this e-mail is to prepare you and others for the proposed conference call. This e-mail does not formally convey an NRC staff position, and does not formally request for additional information.

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

Subject:

Kewaunee - Additional Set of Draft RAI re. X/Q Values for Control Room Habitability LAR (TAC MD6773)

Sent Date: 10/21/2008 3:33:59 PM Received Date: 10/21/2008 4:06:00 PM From: Peter Tam

Created By: Peter.Tam@nrc.gov Recipients:

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

Tracking Status: None craig.d.sly@dom.com (Craig Sly (craig.d.sly@dom.com))

Tracking Status: None Robert.Taylor@nrc.gov (Robert Taylor)

Tracking Status: None Aleem.Boatright@nrc.gov (Aleem Boatright)

Tracking Status: None Leta.Brown@nrc.gov (Leta Brown)

Tracking Status: None Post Office:

Files Size Date & Time MESSAGE 12371 10/21/2008 Options Expiration Date:

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