UNITED STATES

NUCLEAR REGULATORY COMiIISSION

REGION I

2100 Renaissance Boulevad

KING OF PRUSSIA, PENNSYLVANIA 1940&1415

January 14, 20L3

CAL No. 1-2012-002 (Revision 1)

Mr. Kevin Walsh

Site Vice President, North Region

Seabrook Nuclear Power Plant

NextEra Energy Seabrook, LLC

c/o Mr. Michael O'Keefe

P.O. Box 300

Seabrook, NH 03874

SUBJECT: REVISION TO CONFIRMATORY ACTION LETTER, SEABROOK STATION,

UNIT 1 - INFORMATION RELATED TO CONCRETE DEGRADATION ISSUES

Dear Mr. Walsh:

This letter confirms receipt of your letter of December 13,2012, related to the NRC

Confirmatory Action Letter (CAL) issued to NextEra Energy Seabrook, LLC (NextEra) on

May 16, 2012 (ADAMS Accession Number ML12125A172). The CAL confirmed actions

planned to be taken by NextEra in regard to the degradation of concrete in certain structures

due to an Alkali-Silica Reaction (ASR). In the December 13,2012,letter, you requested

changes to two of the commitments (CAL ltems Nos. 7 and 1 1). We accept your proposed

changes as discussed below:

CAL ltem No. 7 - You requested the deletion of this commitment, which required that NextEra

conduct a long term aggregate expansion test (ASTM C 1293 Concrete Prism Testing) by

June 30, 2013. Your letter states that the Mortar Bar Expansion testing conducted in

accordance with CAL ltem No. 6 identified that the coarse aggregates contain sufficient reactive

silica for the ASR reaction and expansion to continue long-term under existing environmental

conditions. Therefore, the results of the Mortar Bar Expansion Testing have obviated the need

to conduct additional aggregate expansion testing. Further information regarding this issue is

provided in NRC Inspection Report No. 0500044312012009, Section 5 (ADAMS Accession

Number ML123384283). Accordingly, the NRC has concluded that NextEra's commitment to

complete long term aggregate expansion testing by June 30,2013, may be deleted.

CAL ltem No. 11 - You requested that the NRC change this commitment from completing the

anchor test program by December 31 ,2012, to "submit the technical details of the anchor test

program planned at the contracted research and development facility by February 28,2013."

You requested this change because the anchor testing program, while in progress, would not be

complete by December 31, 2012. NextEra's committed date for completing the anchor testing

was based on the best available projected test schedule in May 2012, and did not fully

anticipate allthe complexities involved in completing the test program. NextEra has completed

some limited testing of anchor performance of ASR-affected concrete as described in
K. Walsh 2

Section 2.3.6, of NRC Inspection Report No. 0500044312012009. These tests results

demonstrated satisfactory performance of the anchors and were used to support NextEra's

prompt operability evaluation. Based on our findings regarding anchor performance, the NRC

finds the requested commitment change acceptable.

The original Confirmatory Action Letter 2012-002 issued May 2Q12 remains in effect except as

modified for CAL ltems 7 and 11, above.

ln accordance with Title 10 of the Code of Federal Regulations (10 CFR) 2.390 of the NRC's

"Rules of Practice," a copy of this letter, its enclosure, and your response (if any), will be

available electronically for public inspection in the NRC Public Document Room or from the

Publicly Available Records System (PARS) component of NRC's Agencywide Documents

Access and Management System (ADAMS), accessible from the NRC Web site at

http://www.nrc.gov/reading-rm/adams.html (the Public Electronic Reading Room). To the extent

possible, your response, if you choose to provide one, should not include any personal privacy,

proprietary, or safeguards information so that it can be made available to the public without

redaction. lf proprietary information is necessary to provide an acceptable response, then

please provide a bracketed copy of your response that identifies the information that should be

protected and a redacted copy of your response that deletes such information. lf you request

withholding of such material, you must specifically identify the portions of your response that

you seek to have withheld and provide in detail the bases for your claim of withholding (e.9.,

explain why the disclosure of information will create an unwarranted invasion of personal

privacy or provide the information required by 10 CFR 2.390(b) to support a request for

withholding confidential commercial or financial information). lf safeguards information is

necessary to provide an acceptable response, please provide the level of protection described

in 10 CFR 73.21.

lf you have any questions, please contact Richard J. Conte at (610) 337-5183 or e-mail

richard. conte@nrc. gov.

William M. Dean

Regional Adm inistrator

Docket No.: 50-443

License No.: NPF-86

cc: Distribution via ListServ
K. Walsh 2

Section 2.3.6, of NRC Inspection Report No. 0500044312012009. These tests results

demonstrated satisfactory performance of the anchors and were used to support NextEra's

prompt operability evaluation. Based on our findings regarding anchor performance, the NRC

finds the requested commitment change acceptable

The original Confirmatory Action Letter 2012-002 issued May 2012 remains in effect except as

modified for CAL ltems 7 and 1 1, above.

ln accordance with Title 10 of the Code of Federal Regulations (10 CFR) 2.390 of the NRC's

"Rules of Practice," a copy of this letter, its enclosure, and your response (if any), will be

available electronically for public inspection in the NRC Public Document Room or from the

Publicly Available Records System (PARS) component of NRC's Agencywide Documents

Access and Management System (ADAMS), accessible from the NRC Web site at

http://www.nrc.gov/reading-rm/adams.html (the Public Electronic Reading Room). To the extent

possible, your response, if you choose to provide one, should not include any personal privacy,

proprietary, or safeguards information so that it can be made available to the public without

redaction. lf proprietary information is necessary to provide an acceptable response, then

please provide a bracketed copy of your response that identifies the information that should be

protected and a redacted copy of your response that deletes such information. lf you request

withholding of such material, you must specifically identify the portions of your response that

you seek to have withheld and provide in detail the bases for your claim of withholding (e.9.,

explain why the disclosure of information will create an unwarranted invasion of personal

privacy or provide the information required by 10 CFR 2.390(b) to support a request for

withholding confidential commercial or financial information). lf safeguards information is

necessary to provide an acceptable response, please provide the level of protection described

in 10 CFR 73.21.

lf you have any questions, please contact Richard J. Conte at (610) 337-5183 or e-mail

richard. conte@nrc. gov.

Sincerely,

/RN

William M. Dean

Regional Administrator

Docket No.: 50-443

License No.: NPF-86

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DOCUMENT NAME: G:\DRS\Seabrook Concrete\Proj Man\CAl\Revison Dec 2012\Seabrook ASR CAL2012-002 Rev DEC 29 2O12 docx

ADAMS ACCESSION NUMBER: ML130144555

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OFFICE RYDRS NLO OGC RI/DRS RI/DRP RI/ORA RYDRS

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OFFICE RI/ORA

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K. Walsh 3

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