May 3,2012

SBK-L- 12098

Docket No. 50-443

U.S. Nuclear Regulatory Commission

Attention: Document Control Desk

One White FlintNorlh

11555 Rockville Pike

Rockville, MD 20852

Seabrook Stalion

Actions for Resolution of Alkali Silica Reaction (ASR) Issues

Reference:

1. Public Meeting between NextEra Energy Seabrook and the U.S. Nuclear Regulatory

Commission, April 23, 2012 (MLl 2 1 070659).

During the above referenced meeting, NextEra Energy Seabrook, LLC (NextEra Energy

Seabrook), committed to the U.S. Nuclear Regulatory Commission (NRC) to provide a list of

actions it is taking to resolve ASR issues at Seabrook Station.

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

l. Revise the prompt operability determination (POD) associated with AR581434, 'Reduced

Concrete Properties Below Grade in 6(8!' Electrical Tunnel Exterior Wall,' by June 30,

20t2.

Z. Revise the POD associated with AR1664399, 'Reduced Concrete Modulus of Elasticity

Below Grade in Containment Enclosure Building, RHR Equipment Vaults, EFW Punp

House, and Diesel Generator Fuel Oil Storage Rooms,'by June 30,2012.

3. Complete short term aggregate expansion testing (ASTM C 1260 Mortar Bar Expansion

Test) by June 30 2012, Resutts will be available to the NRC approximately 30 days after

testing is complete.

4. Complete long term aggrcgate expansion testing (ASTM C 1293 Concrete Prism Test) by

June 30, 2013. Results will be available to the NRC approximately 30 days after testing

is complete.

5. Submit the root cause and conective actions for the occurl'ence of ASR at Seabrook

Stationby May 25,2012.

NextEra Energy Seabrook, LLC, P.O. Box 300, Lafayette Road, Seabrook, NH 03874
United States Nuclear Regulatory Commission

SBK-L-12098/Page2

6. Submit the License Renewal Aging Management Program for ASR-affected structures by

May 25,2012.

Submit the evaluation of the impact of ASR on concrete structures and attachments at

Seabrook Station by May 25,20t2.

Submit an ASR integrated corrective action plan by June 8, 2012.

Submit the technical details of the testing planned at the contracted research and

development facility by June 3Q,2Q12.

10. Update the Maintenance Rule Structures Monitoring Program to include monitoring

requirements for selected locations in areas that exhibit ASR by July 15,2012.

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'

12. Complete anchor test program by December 3I,2012.

The dates identified above reflectNexlEra's cunent plans and are subject to change based upon

testing conditions and other considerations. In the event that a date changes, NextEra will noti$'

the NRC in writing.

Regulatory commitnents are listed in the attachment to this letter.

If you have any questions regarding this conespondence, please contact Mr. Michael O'Keefe,

Licensing Manager, at (603) 773-7745'

Sincerely,

NextEra Energy Seabrook, LLC

7.

8.

9.

Paul 

&a.4

O. Freeman

Site Vice President
United States Nuclear Regulatory Commission

SBK-L-l2098lPage 3

cc:

W.M. Dean,

J, G. Lamb,

W. J. Raymond"

A.D. Cunanan,

M. Wentzel,

NRC Region I Administrator

NRC Project Manager, Project Directorate I-2

NRC Resident Inspector

NRC Project Manager, License Renewal

NRC Project Manager, License Renewal

IW, 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., Nuclem Prepmedness Manager

The Commonwealth of Massachusetts

Emergency Management AgencY

400 Wotcester Road

Framingham, MA 017 02-5399
Attachment to SBK-L-12098

List of Regulatory Commitments
Commitment

Number

Commitment Completion

Date

SBK-L-12098-01 Revise the prompt operability determination (POD)

associated with AR581434, 'Reduced Concrete

Properties Below Grade in "B" Electrical Tunnel

Exterior Wall.'

June30,2012.

sBK-L-12098-02 Revise the POD associated with AR1664399,

'Reduced Concrete Modulus of Elasticity Below

Grade in ContainmentEnclosure Building, RHR

Equipment Vaults, EFW Pump House, and Diesel

Generator Fuel Oil Storage Rooms.'

June 30, 2012.

SBK-L-12098-03 Complete short term aggregate expansion testing

(ASTM C 1260 Mortar Bar Expansion Test).

June 30 2012.

Rezults will be

available to the

NRC approximately

30 days after testing

is complete.

SBK-L12098-04 Complete long term ag$egate expansion testing

(ASTM C L293 Concrete Prism Test).

Jrxre 30 2012.

Results will be

available to the

NRC approximately

30 days after testing

is complete.

sBKd-12098-05 Submit the root cause and corrective actions for the

occurrsnce ofASR at Seabrook Station.

MLay25"2012.

SBK-L-12098-06 Submit the License Renewal Aging Managemenl

Program for ASR-affected structures.

May25,2012.

SBK-L-12098-07 Submit the evaluation of the impact of ASR on

concrete structures and attachments at Seabrook

Station.

May 25,2012.
Commitment

Number

Commitment Completion

Date

SBK-L-12098-08 Submit an ASR integrated conective action plan. June 8,2012.

SBK-L-12098-09 Submit the technical details of the testing plarured at

the contracted research and development facility.

June 30,2012.

SBK-L-12098-10 Update the Maintenance Rule Structures Monitoring

Program to include monitoring requirements for

selected locations in areas that exhibit ASR.

JuLy 15,2412.

SBK.L-12098-1 I Perform six-month interval crack measurements and

crack indexing at 20 locations in areas that exhibit

the highest crack indices.

July 15,20L2.

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