ML112360652
| ML112360652 | |
| Person / Time | |
|---|---|
| Issue date: | 11/01/2011 |
| From: | Galloway M Division of License Renewal |
| To: | Keys J Nuclear Energy Institute |
| Wise J | |
| Shared Package | |
| ML112360658 | List: |
| References | |
| LR-ISG-2011-01 | |
| Download: ML112360652 (3) | |
Text
November 1, 2011 Ms. Julie Keys Nuclear Energy Institute 1776 I Street, NW, Suite 400 Washington, DC 20006-3708
SUBJECT:
DRAFT LICENSE RENEWAL INTERIM STAFF GUIDANCE LR-ISG-2011-01: AGING MANAGEMENT OF STAINLESS STEEL STRUCTURES AND COMPONENTS IN TREATED BORATED WATER
Dear Ms. Keys:
I am writing to inform the Nuclear Energy Institute of the opportunity to comment on the draft license renewal interim staff guidance (LR-ISG), LR-ISG-2011-01, Aging Management of Stainless Steel Structures and Components in Treated Borated Water. Enclosed is a copy of the Federal Register notice that announces the NRCs request for comments and provides instructions on how to submit comments.
The NRC staff has determined that existing guidance in the Standard Review Plan for Review of License Renewal Applications for Nuclear Power Plants (SRP-LR) and Generic Aging Lessons Learned (GALL) Report may not adequately address aging management of stainless steel structures and components exposed to treated borated water. Specifically, for pressurized water reactors, the guidance inappropriately credits boron as a corrosion inhibitor in place of other aging management activities. As a result, aging effects such as loss of material, cracking, and reduction of heat transfer may not be adequately managed. The staff has proposed to revise the SRP-LR and GALL Report to align the guidance for treated borated water with that for treated (i.e., non-borated) water. The revisions include adding the One-Time Inspection Program to verify the effectiveness of the Water Chemistry Program to manage loss of material and cracking of stainless steel structures and components exposed to treated borated water and adding reduction of heat transfer due to fouling as an aging effect requiring management for stainless steel heat exchanger tubes exposed to treated borated water.
If you have any questions, please contact Dr. John Wise of my staff by telephone at 301-415-8489 or by e-mail at John.Wise@nrc.gov.
J. Keys To inform other stakeholders of the opportunity to provide comments on the draft LR-ISG-2011-01, courtesy copies of this letter are being sent to subscribers of an NRC electronic mailing list on general license renewal topics.
Sincerely,
/RA/
Melanie A. Galloway, Acting Director Division of License Renewal Office of Nuclear Reactor Regulation
Enclosures:
As stated cc w/encls: Reactor License Renewal Stakeholder Group Listserv
ML112360658 (Package), ML112360652 (Letter), ML112360647 (FRN), ML112360626 (LR-ISG)
OFFICE ME:DLR:RAPB PM:DLR:RPOB LA:DLR BC:DLR:RAPB NAME JWise EGettys YEdmonds DPelton DATE 10/14/2011 9/30/2011 10/14/2011 10/12/2011 OFFICE BC:DLR:RARB BC:DCI:CPNB OGC (NLO) D:DLR NAME BPham TLupold MSpencer MGalloway DATE 9/22/2011 10/5/2011 10/26/2011 11/1/2011