ML071020345

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E-MAIL: (PD) Revised Draft ACRS Fluence Slides2
ML071020345
Person / Time
Site: Pilgrim
Issue date: 03/28/2007
From: Ford B
Entergy Nuclear Operations
To: Perry Buckberg
NRC/NRR/ADRO
References
TAC MD3698
Download: ML071020345 (6)


Text

Page 1 of 1 Perry Buckberg - Revised DARFT ACRS Fluence Slides From: "Ford, Bryan" <BFord@entergy.com>

To: "Perry Buckberg" <PHB 1 @nrc.gov>

Date: 3/28/2007 4:28 PM t

Subject:

Revised DARFT ACRS Fluence Slides FYI file://C:\temp\GW 100001 .HTM 3/30/2007

I c:\temp\GW~ObOO4.TMP ~F~~i7I Mail Envelope Properties (460ACFE1.B09 : 6: 51977)

Subject:

Revised DARFT ACRS Fluence Slides Creation Date 3/28/2007 4:27:54 PM From: "Ford, Bryan" <BFord@entergy.com>

Created By: BFord@entergy.com Recipients nrc.gov OWGWPO01 .HQGWDO01 PHB 1 (Perry Buckberg)

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Reactor Vessel Neutron Fluence 01 4.2

  • Lack of benchmarking data to support plant specific fluence calculations for use in TLAAs

Reactor Vessel Neutron Fluence Current Licensing Basis

- 10 CFR 50 App. G requirement for current operation

- Current P-T curves valid through Cycle 18 (2011 RFO)

- Commitment to Submit Action Plan for Resolution by September 15, 2007

- Commitment to submit RG 1.190 calculations by June 8, 2010

Reactor Vessel Neutron Fluence Current Actions Evaluate TLAAs to determine limiting Fluence

  • Limiting Beltline Adjusted Reference Temperature
  • Upper Shelf Energy

" RPV Internals

" RPV Welds

  • RPV nozzles near beltline

- Core Shroud Fluence Limiting based on BWRVIP-35

- Limiting Fluence values will not be challenged

Reactor Vessel Neutron Fluence Future Actions

- Benchmark Computer Code using Pilgrim or other BWR3 Dosimetry Data Previous commitment to submit action plan by September 15, 2007

- License Condition to submit calculations consistent with RG 1.190 by June 8, 2010 which demonstrate limiting fluence values will not be reached during period of extended operation.