ML080450480

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2/13/08 Meeting Handout
ML080450480
Person / Time
Site: Monticello Xcel Energy icon.png
Issue date: 02/13/2008
From:
Nuclear Management Co
To:
Office of Nuclear Reactor Regulation
References
TAC MD5531
Download: ML080450480 (12)


Text

NMC Committed to NuclearExcellence Steam Dryer Evaluation Preliminary Results for Monticello Extended Power Uprate (EPU) K February 13, 2008 CacmmtedIo Nuc Ec k

Agenda ntroductions

)bjectives A.onticello Steam Dryer Information ndustry Steam Dryer Information Aonticello Steam Dryer Evaluation Approach lIosed Session Monticello Steam Dryer Evaluation Results

- Power Ascension Plan

)ummary and Conclusion CoC-i-ted to a I,

2

bjectrives

'resent results from Monticello steam I-ryer structural evaluation

)btain NRC feedback

)chedule Committed to Nuce 3

Montilce-io Steram Dryer Information Square hood design Steam dryer licensing basis accident is

,main steam line break outside of containment Steam dryer inspection per Boiling Water Reactor Vessel Internals Project.

ý(BWRVIP) 139 N~i Coomttod toNvdwExce~~

4

Mlonitice-fo Steam Dryer Information "This bank partitioned into.

-twaosections with flows in opposite directions (Z.

Man Way

'Cover pItted to NuclearExceRl'

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Representative / 5

>~ ~

Iindustry Steam Dryer Informationi PRI and BWRVIP initiative to provide consistent steam dryer evaluation iethod:

- BWRVIP-182 Guidance for Demonstrating Steam Dryer Integrity for Power Uprate (Submitted January 30, 2008)

- BWRVIP-XXX Steam Dryer Integrity Demonstration Methodologies Report - bas~ed-. _

--on Continuum Dynamics Incorporated (Cfl) technologies (planned submittal late 2008), .

NM..*o*ci:ý,*.

Commit ed t Nda 6

)f*jticelilo Steam Dryer Evaluation Approach Consistent with:

- BWRVIP-182

- Draft BWRVIP Methodologies Report

- Recent EPU applicants

- RG 1.20, Revision 3 e 90-day startup reporting exception Committed to NulearExce Ir 7

ontiicell Io Steam Dryer Evaluation Approach Steam Dryer Analysis (BWRVI P-1 82)

- Screening of susceptibility to acoustic excitation validated by scale model tests (SMTs)

- Strain gage measurements of CLTP main steam line (MSL) acoustics

- Acoustic circuit model (ACM) of steam dome

- Load definition at CLTP

- Finite Element Model (FEM) of dryer at CL7

. Limit curves for EPU power ascension Committed Ito Nuclear Eacelle c 8

)foitiieeNo Steam Dryer Evaluation Results Closed Session Commilled to NucearExcelJe*

9

Summary and Conclusions Open Session Commfledtoý Nuer!eoi 10

. a Summary and Conclusions 9 Steam Dryer Structural Evaluation Approach

- Consistent with EPRI/BWRVIP submittal

- Incorporates industry experience

  • Steam Dryer Structural Evaluation Results

- Acceptable stress ratio

- Highest stresses occur where expected

  • Power Ascension Plan with Dryer Limit Curves

-Schedule

- Steam dryer structural evaluation submitted wit Pqc AR, (first quarter 2008) 1/ \ *:eY NMC Commed tofNclearEXNvdaEo 11

Monticello Projects Time Line