ML083531002

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Proposed Eou Amendment - Revised RAI Re. Containment Analysis
ML083531002
Person / Time
Site: Monticello Xcel Energy icon.png
Issue date: 12/18/2008
From: Tam P
Plant Licensing Branch III
To: Blake T, Pointer K, Salamon G
Northern States Power Co
Tam P
References
TAC MD9990
Download: ML083531002 (2)


Text

Accession No. ML083531002 From: Peter Tam Sent: Thursday, December 18, 2008 4:56 PM To: 'Pointer, Kenneth'; Salamon, Gabor; 'Blake, Tim M.'

Cc: Richard Lobel; Robert Dennig; Ahsan Sallman

Subject:

Monticello - proposed EPU amendment, revised RAI on containment analysis (TAC MD9990)

Ken, Gabe:

Please refer to our telecon with you and GEH on 12/09/08 regarding the information requested in my earlier email for containment analysis. As our reviewer Ahsan Sallman of the Containment and Ventilation Branch agreed, we have modified the first 3 questions. We have also added Question 4 . Please see below. If you wish to discuss these questions, please contact me. Otherwise, please let me know when you will provide a formal response.

(1) Containment analysis input parameters to perform the following:

(a) Design-basis accident (DBA) LOCA short-term analysis (b) DBA LOCA long-term analysis (c) DBA LOCA net positive suction head (NPSH) analysis (d) Small steam line break accident analysis (e) Anticipated transient without scram (ATWS) NPSH analysis (f) Appendix R NPSH analysis (g) Station blackout NPSH analysis (2) Fractional decay heat versus time used for the above, (a) analysis up to 100 seconds, and for (b) through (g) analyses up to 100,000 seconds.

(3) Mass and energy released inside containment for the following:

(a) DBA LOCA short-term analysis (b) DBA LOCA long-term analysis (c) DBA LOCA NPSH analysis (d) Small steam line break analysis - most limiting case.

(4) Core Spray (CS) Pumps, Residual Heat Removal (RHR) system pumps and High Pressure Coolant Injection (HPCI) system pumps inlet centerline elevations, overall pump inlet piping (including components) pressure loss versus flow, and the required pump NPSH at pump inlet based on 1-percent and 3-percent head loss.

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 (C56E360E9D804F4B95BC673F886381E71827DC2251)

Subject:

Monticello - proposed EPU amendment, revised RAI on containment analysis (TAC MD9990)

Sent Date: 12/18/2008 4:56:26 PM Received Date: 12/18/2008 4:56:00 PM From: Peter Tam Created By: Peter.Tam@nrc.gov Recipients:

Kenneth.Pointer@xenuclear.com ('Pointer, Kenneth')

Tracking Status: None Gabor.Salamon@xenuclear.com (Salamon, Gabor)

Tracking Status: None Tim.Blake@xenuclear.com ('Blake, Tim M.')

Tracking Status: None Richard.Lobel@nrc.gov (Richard Lobel)

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

Tracking Status: None Ahsan.Sallman@nrc.gov (Ahsan Sallman)

Tracking Status: None Post Office:

HQCLSTR02.nrc.gov Files Size Date & Time MESSAGE 9193 12/18/2008 Options Expiration Date:

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