ML121040102

Information Request During the Public Meeting Related to Alkali-Silica Reaction Concrete Degradation Issues, Scheduled for April 23, 2012

ML121040102
Person / Time
Site:	Seabrook
Issue date:	04/17/2012
From:	Meena Khanna Plant Licensing Branch 1
To:	Freeman P NextEra Energy Seabrook
Lamb, JG, NRR/DORL/ 1-2, 415-1446
References
Download: ML121040102 (4)

Text

UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 April 17, 2012 Mr. Paul Freeman Site Vice President, North Region Seabrook Nuclear Power Plant NextEra Energy Seabrook, LLC c/o Mr. Michael OKeefe P.O. Box 300 Seabrook, NH 03874

SUBJECT:

SEABROOK STATION, UNIT 1 -INFORMATION REQUEST IN SUPPORT OF THE APRIL 23,2012, PUBLIC MEETING RELATED TO ALKALI-SILICA REACTION CONCRETE DEGRADATION ISSUES

Dear Mr. Freeman:

On March 23, 2012, the U.S. Nuclear Regulatory Commission (NRC) staff issued a public meeting notice (Agencywide Documents Access and Management System (ADAMS)

Accesssion No. ML120870217) to discuss NextEra Energy Seabrook, LLC's (NextEra's) plans and schedule regarding concrete degradation caused by alkali silica reaction (ASR) at Seabrook Station, Unit 1 (Seabrook).

By letter dated March 26, 2012 (ADAMS Accession No.ML120480066), NRC issued Inspection Report 05000443/2011010 related to the ASR issue in safety-related structures. The inspectors concluded that these structures can currently perform their safety-related functions despite the observed degradation due to ASR. However, the NRC indicated in the inspection report that it still has concerns associated with the long-term operability; therefore, additional information was requested in the inspection report. Enclosed are questions that the NRC staff requests that NextEra address during the upcoming meeting on April 23, 2012, at NRC Headquarters in Rockville, Maryland.

P. Freeman -2 If you have any questions, please contact John G. Lamb at (301) 415-3100 or e-mail John. Lamb@nrc.gov.

Sincerely, Meena Khanna, Chief Plant licensing Branch 1-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No. 50-443

Enclosure:

As stated cc w/encl: Distribution via Listserv

Questions for Seabrook ASR Public Meeting on April 23, 2012

1. What buildings are affected by alkali silica reaction (ASR)? How do you plan to confirm ASR and what is your supporting basis?

2. When do you plan to update the operability determinations for all buildings affected by ASR and what key information do you plan to incorporate into them including key assumptions, bases for inputs, including material properties, and calculation methods used?

3. If you continue to use the empirical relationships in the American Concrete Institute (ACI) design basis code for operability determinations, what is the basis for use of those relationships, and what is the explanation regarding why these are appropriate for the degraded conditions in the building?

4. What are your ongoing or planned methods, analysis or testing that will be used to monitor/manage ASR affected structures? What is your knowledge of the ASR reaction rate, possible end point, and how it affects operability?

5. When will you submit to the NRC staff your Corrective Action Plan to address this issue?

6. When will you provide the technical details for the larger-scale testing planned at the contracted research and development facility?

7. When do you plan to complete the identification of all of the long-term aging effects of ASR on the affected structures?

8. When do you plan to submit an aging management program for the ASR-affected structures?

Enclosure

P. Freeman -2 If you have any questions, please contact John G. Lamb at (301) 415-3100 or e-mail John.Lamb@nrc.gov.

Sincerely, Ira!

Meena Khanna, Chief Plant Licensing Branch 1-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No. 50-443

Enclosure:

As stated cc w/encl: Distribution via Listserv DISTRIBUTION: RidsNrrOd Public RidsOgc Resource LPL 1-2 r/f RidsRgn1 MailCenter Resource RidsAcrsAcnw_MailCTR Resource RidsOpaMail Resource RidsNrrDorl Resource RidsNrrLAABaxter Resource RidsNrrDorlLpl1-2 Resource RidsNrrPMSeabrook Resource NSheehan, OPA RI EDacus,OCA MKhanna, NRR DMclntyre, NRR RidsNrrDeEmcb Resource RidsOe Resource ADAMS ACCESSION NO' ML121040102 *via email OFFICE NRR/LPL 1-2/PM NRR/LPL 1-2/LA RI/DRS/BC RIIDRP/BC NRR/EMCB/BC NRR/LPL 1-2/BC NAME JLamb SLittle* forABaxter RConte* ABurritt* MMurphy* MKhanna DATE 04/16/2012 04/17/2012 04/17/2012 04/16/2012 04/17/2012 04/17/2012 OFFICIAL RECORD COpy