ML12278A250

Summary of Telephone Conference Call Held Between NRC and NextEra Seabrook, Concerning the RAIs Pertaining to the Seabrook Station, LRA

ML12278A250
Person / Time
Site:	Seabrook
Issue date:	11/01/2012
From:	Michael Wentzel License Renewal Projects Branch 2
To:
Wentzel M, 415-6459
References
TAC ME3959
Download: ML12278A250 (6)

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NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 November 1, 2012

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LICENSEE:

NextEra Energy Seabrook, LLC FACILITY:

Seabrook Station

SUMMARY

OF TELEPHONE CONFERENCE CALL HELD ON OCTOBER 3,2012, BETWEEN THE U.S. NUCLEAR REGULATORY COMMISSION AND NEXTERA ENERGY SEABROOK, LLC, CLARIFYING RESPONSES TO REQUEST FOR ADDITIONAL INFORMATION PERTAINING TO THE SEABROOK STATION LICENSE RENEWAL APPLICATION ENVIRONMENTAL REVIEW (TAC. NO. ME3959)

The U.S. Nuclear Regulatory Commission (NRC or the staff) and representatives of NextEra Energy Seabrook, LLC (NextEra or the applicant) held a telephone conference call on October 3,2012, to discuss and clarify NextEra's September 13,2012, responses to the staffs requests for additional information concerning the Seabrook Station license renewal application environmental review. provides a listing of the participants and Enclosure 2 contains a listing of the clarifications requested from the applicant, including a brief description of the status.

The applicant had an opportunity to comment on this summary.

1J~G~y Michael Wentzel, p~ject Manager Projects Branch 2 Division of License Renewal Office of Nuclear Reactor Regulation Docket No. 50-443

Enclosures:

As stated cc w/encl: Listserv

PARTICIPANTS Michael Wentzel John Parillo Rick Cliche Rich Turcotte TELEPHONE CONFERENCE CALL SEABROOK STATION LICENSE RENEWAL APPLICATION LIST OF PARTICIPANTS OCTOBER 3, 2012 AFFILIATIONS U.S. Nuclear Regulatory Commission (NRC)

NRC NextEra Energy Seabrook, LLC (NextEra)

NextEra ENCLOSURE 1

CLARIFICATIONS REQUESTED PERTAINING TO NEXTERA ENERGY SEABROOK, LLC'S SEPTEMBER 13, 2012 RESPONSE TO REQUEST FOR ADDITIONAL INFORMATION OCTOBER 3,2012 The U.S. Nuclear Regulatory Commission (NRC or the staff) and representatives of NextEra Energy Seabrook, LLC (NextEra) held a telephone conference call on October 3, 2012, to discuss and clarify NextEra's September 13, 2012, responses to the staffs requests for additional information (RAls) concerning the Seabrook Station license renewal application environmental review.

Response to RAI 1.a In the RAI response, the core damage frequency (CDF) for LPCCA is presented as 3.19E-7/yr, an increase from the 2.34E-7/yr presented in the July 2012 severe accident mitigation alternatives (SAM A) analysis supplement. Which is the correct value and what is the reason for the difference? Is the correct value the basis for risk reduction and benefit values presented in the SAMA analysis supplement, and recent RAI responses dated September 13, 2012?

Discussion:

NextEra stated, and the staff verified, that the values that were presented in the September 13, 2012, response to the staff RAls for initiating event CDFs, were correct as presented and consistent with those presented in its March 19, 2012, SAMA supplement. Note: The CDF for LPCCA is 2.34E-7/yr; The CDF for LACPA is 3. 19E-7/yr.

Response to RA14.c In the RAI response to RAI 4.c, the maximum averted benefit (MAB) is given as $3,048,510, slightly different from the $3,051,815 value given in March 2012 SAMA analysis supplement.

Which is the correct value and what is the reason for the difference? The small reduction in MAB had negligible impact on the cost benefit assessment of all individual SAMAs.

Discussion:

NextEra stated that the correct MAB value is $3,048,510. The change in MAB from the March 19, 2012, supplement to the September 13, 2012, responses to RAls resulted from minor changes in the analysis due to internal review by NextEra personnel. The change made consistent the assumptions used for time to declare a general emergency.

Table RAI-3-2 New LL5 Basic Event SAMA Candidates In Table RAI-3-2, SAMA analysis case SW707C appears to address two different situations:

one eliminating the failure of SW Cooling Tower pump room ventilation fans FN-70 and 71 and another eliminating failure of SW Cooling Tower SWGR room ventilation fans FN-63 and 64.

These appear to be grouped for convenience. Clarify how the risk benefit is determined in each case.

ENCLOSURE 2

- 2 Discussion:

NextEra stated that the two cases represent the same basic risk in the Seabrook probabilistic risk assessment, so there was no need to break them out separately. NextEra further stated that the risk benefit would be the same in both cases.

Table RAI-3-3 Phase II Evaluation of New CDF Initiating Event SAMA Candidates In Table RAI-3-3, the expected SAMA costs presented for initiating events F4TFPB, FCRAC, and LOC1 LG is $1 OOK. This value appears to be a nominal value rather than a calculated cost (in light of the low calculated benefits perhaps). Clarify the basis for the $1 OOK value used for these SAMA analysis cases.

Discussion:

NextEra stated that the $1 OOK value is a nominal value and that a more detailed cost benefit was not performed due to low benefit. Additionally, the $1 OOK value is used by NextEra as the minimum value for the purposes of the SAMA analysis. Additionally, the $1 OOK value is used by NextEra in their SAMA analysis as the minimum implementation cost associated with a hardware change.

ML12278A250

• concurred via email OFFICE LA:DLR*

PM:RPB2:DLR BC:RPB2:DLR PM:RPB2:DLR NAME IKing MWentzel DWrona MWentzel DATE 10/18/12 11/1/12 11/1/12 11/1/12

Letter to NextEra Energy Seabrook, LLC, from M. Wentzel dated November 01, 2012 DISTRI BUTION:

SUMMARY

OF TELEPHONE CONFERENCE CALL HELD ON OCTOBER 3,2012, BETWEEN THE U.S. NUCLEAR REGULATORY COMMISSION AND NEXTERA ENERGY SEABROOK, LLC, CLARIFYING RESPONSES TO REQUEST FOR ADDITIONAL INFORMATION PERTAINING TO THE SEABROOK STATION, LICENSE RENEWAL APPLICATION ENVIRONMENTAL REVIEW (TAC. NO. ME3959)

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PUBLIC RidsNrrDlr Resource RidsNrrDlrRpb1 Resource RidsNrrDlrRpb2 Resource RidsNrrDlrRarb Resource RidsNrrDlrRapb Resource RidsNrrDlrRasb Resource RidsNrrDlrRerb Resource RidsNrrDlrRpob Resource RidsNrrDraApla Resource MWentzel PMilano DMorey DWrona JParillo JLamb DMclntyre,OPA EDacus,OCA MSpencer, OGC MSmith,OGC DTifft, RI NMcNamara, RI NSheehan, RI DScrenci, RI ABurritt, RI JGreives, RI MJennerich, RI