SBK-L-12104, Supplement to Actions for Resolution of Alkali Silica Reaction (ASR) Issues

Supplement to Actions for Resolution of Alkali Silica Reaction (ASR) Issues

ML12131A479
Person / Time
Site:	Seabrook
Issue date:	05/10/2012
From:	Freeman P NextEra Energy Seabrook
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
SBK-L-12104
Download: ML12131A479 (6)

Text

May 10,2012 SBK-L-12104 DocketNo.50443 U.S. Nuclear Regulatory Commission Attention: Document Conftol Desk One White FlintNorth 11555 Rockville Pike Rockville, MD 20852 Seabrook Station

$upplenneJt.Le Actionsifor Rgsqlu!!-qts.f Alkali Sjlisa-Reacli-on-(ASR) Issues

Reference:

1. Public Meeting between NextEra Energy Seabrook" LLC (NextEra Energy Seabrook) and the u.s. Nuclear Regulatory commission, April 23,2012 (MI-121070659),

2. NextEra Energy Seabrook letter SBK-L-12098, "Actions for Resolution of Alkali Silica Reaction (ASR) Issues," to NRC, dated May 3,20L2.

During the above referenced meeting, NextEra Energy Seabrook committed to the U.S. Nuelear Regulatory Commission (NRC) to provide a list of aotions it is taking to resolve ASR issues at Seabrook Station. NextEra Energy Seabrook provided the list of actions in Reference 2.ln a subsequent conference call with the NRC on May 7,2012, NextEra Energy Seabrook committed to providing supplementary information regarding the list of actions.

NextEra Energy Seabrook will take the following actions to resolve ASR at Seabrook Station:

1. Revise the prompt operability determination (POD) associated with AR581434581434 'Reduced Concrete Properties Below Grade in "Bo'Electrical Tunnel Exterior Wall,' by May 25, 2012. NextEra Energy Seabrook will notifr the site NRC Resident Inspector upon completion of this action.

) Revise the POD associated with AR16 64399, 'Reduced Concrete Modulus of Elastioity Below Grade in Containment Enclosure Building, RHR Equipment Vaults, EFW Pump House, and Diesel Generator Fuel Oil Storage Rooms,' by June 30,2012. The expanded scope buildings will be included in this POD. NextEra Energy Seabrook will notiff the site NRC Resident lnspector upon completion of this action.

NextEra Energy Seabrook, LLC, P,O. Box 300, Lafayette Road, Seabrook, NH 03874

United States Nuclear Regulatory Commission SBK-L-I2104/ Page 2

3. Complete short term aggregate expansion testing (ASTM C 1260 Mortar Bar Expansion Test) by June 30, 2012. Results will be available for NRC review approximately 30 days after testing is complete.

4. Complete long term aggregate expansion testing (ASTM C 1293 Concrete Prism Test) by June 30,2013. Results will be available forNRC review approximately 30 days after testing is complete.

5. Submit the root cause for the organizational causes associated with the occunence of ASR at Seabrook Station and related corrective actions by May 25,2012.

6. Submit the License Renewal Aging Management Program for ASR-affected structures by May 25,2012.

7. Submit the evaluation, "Impact of ASR on Concrete Structures and Attachments,"

(Foreign Print 100716) by May 25,2012.

8. Submit the corrective action plan for the continued assessment of ASR in concrete structures at Seabrook Station including development of remedial actions to rnitigate the affects of ASR, where waranted, by June 8,2012.

9. Submit the technical details of the testing planned at the contracted research and development facility by June 34,2012,

10. Update the Maintenance Rule Structures Monitoring Program to include monitoring requirements for selected locations in areas that exhibit ASR by July 15, 2012. NextEra Energy Seabrook will notiff the site NRC Resident Inspector upon completion of this action.

11. Perform six-month interval crack measurements and crack indexing at 20 locations in areas that exhibit the highest crack indices by July 15,2012. NextEra Energy Seabrook will notifu the site NRC Resident Inspector upon completion of this action, Crack measurement will be performed at six-month intervals until a reliable trend of ASR progression is established.

12. Complete anchor test program by December 31, 2012. Results will be available for NRC review approximately 30 days aftertesting is complete' The dates identified above reflect NextEra's current plans and are subject to change based upon testing conditions and other considerations. In the event that a date changes, NextEra will notiff the NRC in writing.

Regulatory commitnents are listed in the attachrnent to this letter.

United States Nuclear Regulatory Commission SBK-L-I2104/ Page 3 If you have any questions regarding this correspondence, please contact Mr. Michael O'Keefe, Licensing Manager, at (603) 773-7745.

Sincerely, NextEra Energy Seabrook, LLC Paul O. Freeman Site Vice President cc:

W.M. Dean, NRC Region I Administrator J. G. Lamb, NRC Project Manager, Project Direstorate I-2 W. J. Raymond, NRC Resident lnspector A.D. Cunanan, NRC Project Manager, License Renewal M. Wentzel, NRC Project Manager, License Renewal Mr. Christopher M. Pope Director Homeland Security and Emergency Management New Hampshire Department of Safety Division of Homeland Security and Emergency Management Bureau of Emergency Management 33 Hazen Drive Concord, NH 03305 John Giamrsso, Jr., Nuclear Preparedness Manager The Commonwealth of Massachusetts Emergency Management Agency 400 Worcester Road Framingham, MA 01702 -5399

Attachment to SBK-L-12104 List of Regulatory Commitments

Commitment Commitmeut Completion Number Date SBK-L-12098-01 Revise the prompt operability determination (POD) May 25,2412.

associated with AR581434581434 'Reduced Concrete Properties Below Grade in "B" Electrical Tunnel Exterior Wall.' NextEra Energy Seabrook will notifu the site NRC Resident Inspector upon completion of this action.

SBK-L-I2098-02 Revise the POD associated with AR1664399, June 30,2012.

'Reduced Concrete Modulus of Elasticity Below Grade in Containment Fnclosure Building RHR Equipment Vaults, EFW Pump House, and Diesel Generator Fuel Oil Storage Rooms.' The expanded scope buildings will be included in this POD.

NextEra Energy Seabrook will notiff the site NRC Resident Inspector upon completion of this action.

SBK-L-12098-03 Complete short term aggregate expansion testing Iune30,2012.

(ASTM C 1260 Mortar Bar Expansion Test).

Results will be available forNRC review approximately 30 days after testing is complete.

SBK-L-12098-04 Complete long term aggregate expansion testing June 30,2012.

(ASTM C 1293 Concrete Prism Test).

Results will be available forNRC review approximately 30 days after testing is complete.

SBK-L-12098-05 Submit the root cause for the orgarizational causes May 25,2012.

associated with the occurtence of ASR at Seabrook Station and related corrective actions.

SBK-L-12098-06 Submit the License Renewal Aging Management May 25,2Q12.

Program for ASR-affected structures.

Commitment Commitment Completion Number Date SBK-L-I2098-07 Submit the evaluatiory "Impact of ASR on Concrete May25,2012.

Structures and Attachments," (Foreign Print l0o7r6).

SBK-L-12098-08 Submit the conective action plan for the continued June 8, 2012.

assessment of ASR in concrete structures at Seabrook Station including development of remedial actions to mitigate the affects of AS& where warranted.

SBK-L-12098-09 Submit the technical details of the testing planned at June 30,2012.

the corrtracted research and development facility.

SBK-L-12098-10 Update the Maintenance Rule Structures Monitoring July 15,2012, Program to include monitoring requirements for selected locations in areas that exhibit ASR.

NextEra Energy Seabrook will notify the site NRC Resident Inspector upon completion of this action.

SBK-L-12098-11 Perform six-month interval crack measurements and July 75,2012.

crack indexing at 20locations in areas that exhibit the highest crack indices. NextEra Energy Seabrook will notiff the site NRC Resident Inspector upon completion of this action. Crack measurement will be performed at six-month intervals until a reliable trend of ASR progression is established.

SBK-L-12098-12 Complete anchor test program. December 31,2012.

Results will be available forNRC review approximately 30 days after testing is cornplete.