ML071020343

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E-MAIL: (PD) Revised Draft ACRS Fluence Slides
ML071020343
Person / Time
Site: Pilgrim
Issue date: 03/29/2007
From: Perry Buckberg
NRC/NRR/ADRO
To: Lois L, Matthew Mitchell
NRC/NRR/ADES
References
TAC MD3698
Download: ML071020343 (6)


Text

Page 1 of 1 Perry Buckberg - Fwd: Revised DARFT ACRS Fluence Slides From: Perry Buckberg To: Lambros Lois; Matthew Mitchell Date: 3/29/2007 7:31 AM

Subject:

Fwd: Revised DARFT ACRS Fluence Slides CC: Christopher Sydnor FYI - Revised fluence slides from Entergy Perry

>>> "Ford, Bryan" <BFord@entergy.com> 3/28/2007 4:27 PM >>

FYI file://C:\temp\GW 100001 .HTM 3/30/2007

ctrn\W)00004.TMP- ____ _ _

Mail Envelope Properties (460BA3AC.726 : 9: 8248)

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Fwd: Revised DARFT ACRS Fluence Slides Creation Date 3/29/2007 7:31:56 AM From: Perry Buckberg Created By: PHB1@nfrc.gov Recipients Action Date & Time nrc.gov TWGWPOO1 .HQGWDO01 Delivered 3/29/2007 7:32:01 AM LXL1 (Lambros Lois)

MAM4 (Matthew Mitchell) nrc.gov TWGWPO02.HQGWDO01 Delivered 3/29/2007 7:32:01 AM CRS CC (Christopher Sydnor)

Post Office Delivered Route TWGWPO01 .HQGWDO01 3/29/2007 7:32:01 AM nrc.gov TWGWPO02.HQGWDO01 3/29/2007 7:32:01 AM nrc.gov Files Size Date & Time MESSAGE 669 3/29/2007 7:31:55 AM TEXT.htm 522 UNTITLED.PPT 13312 3/29/2007 7:30:58 AM Options Auto Delete: No Expiration Date: None Notify Recipients: Yes Priority: Standard ReplyRequested: No Return Notification: None Concealed

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No Security: Standard To Be Delivered: Immediate Status Tracking: Delivered

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 9 Limiting Beltline Adjusted Reference Temperature e Upper Shelf Energy e RPV Internals

  • 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.