ML101320024

E-mail from R. Guzman to T. Darling/J. Dosa Request for Additional Information - LOCA Analysis, Extended Power Uprate

ML101320024
Person / Time
Site:	Nine Mile Point
Issue date:	05/10/2010
From:	Richard Guzman Division of Operating Reactor Licensing
To:	Darling T Constellation Energy Nuclear Group
Guzman R, NRR/DORL, 415-1030
References
TAC ME1476
Download: ML101320024 (2)

Text

From: Guzman, Richard Sent: Monday, May 10, 2010 10:15 AM To: 'Darling, Theresa H' Cc: 'Dosa, John J'

Subject:

Request for Additional Information re: LOCA Analyses

Theresa, As we discussed, the SAFER/GESTR Analysis which was provided in the 12/23/09 supplement addresses the information need of the original draft LOCA question no. 1. We request you provide a response for the remaining two questions shown below. Please let me know if youd like to have a conference call to get further clarification on these additional information needs.

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DRAFT RAI QUESTIONS RE: NMP2 LOCA ANALYSIS REV 1--------

1. Please provide the limiting top skewed axial power shape for the limiting small break loss-of-coolant accident (SBLOCA) analyses evaluating the Appendix K conditions.

2. Please provide the head vs flow curves for all of the Emergency Core Cooling (ECC) injection pumps credited in the analyses.

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DRAFT RAI QUESTIONS RE: NMP2 LOCA ANALYSIS REV 1--------

Thanks, Rich Guzman 301-415-10303 From: Guzman, Richard Sent: Monday, May 03, 2010 6:32 PM To: 'Darling, Theresa H' Cc: Dosa, John J

Subject:

RE: Follow-up conference call - Rx Systems D-RAIs I'd like to shoot for Wednesday for the call. I'll confirm a time with my group and get back to you.

As I mentioned, we have additional questions from the staff covering LOCA analysis +

confirmatory review - see draft questions below. We can discuss them for clarification on a separate day, or if you like, following the subject call this Wednesday. Please advise a time /

date(s) that work best for you.

Thanks, Rich Guzman

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DRAFT RAI QUESTIONS RE: NMP2 LOCA ANALYSIS---------------------------------------------------------------------------------------------

1. Please provide the analysis submittal, with all the attendant key parameter plots, for the SAFER/GESTR large and small break LOCA analyses for the break spectra evaluated at the EPU power level.

2. Please provide the limiting top skewed axial power shape for the limiting SBLOCA analyses evaluating the Appendix K conditions.

3. Please provide the head vs flow curves for all of the ECC injection pumps credited in the analyses.

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DRAFT RAI QUESTIONS RE: NMP2 LOCA ANALYSIS---------------------------------------------------------------------------------------------

E-mail Properties Mail Envelope Properties (92E0E77F3622DA40B501E8D45083D5D9508499C892)

Subject:

Request for Additional Information re: LOCA Analyses Sent Date: 5/10/2010 10:15:11 AM Received Date: 5/10/2010 10:15:00 AM From: Guzman, Richard Created By: Richard.Guzman@nrc.gov Recipients:

Theresa.Darling@cengllc.com ('Darling, Theresa H')

Tracking Status: None John.Dosa@cengllc.com ('Dosa, John J')

Tracking Status: None Post Office:

HQCLSTR01.nrc.gov Files Size Date & Time MESSAGE 13535 5/10/2010 Options Expiration Date:

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