ML101250623

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Summary of Meeting with Dominion Nuclear Connecticut, Inc. (DNC) to Discuss Generic Letter 2004-02 Supplemental Response Request for Additional Information
ML101250623
Person / Time
Site: Millstone  Dominion icon.png
Issue date: 05/24/2010
From: Sanders C
Plant Licensing Branch 1
To:
Sandeers, Carleen, NRR/DORL, 415-1603
References
TAC MC4694, TAC MC4695, FOIA/PA-2011-0115
Download: ML101250623 (5)


Text

UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 May 24,2010 LICENSEE: Dominion Nuclear Connecticut, Inc. (DNC)

FACILITY: Millstone Power Station, Unit Nos. 2 and 3

SUBJECT:

SUMMARY

OF APRIL 20,2010, MEETING WITH DNC TO DISCUSS GENERIC LETTER 2004-02 SUPPLEMENTAL RESPONSE REQUEST FOR ADDITIONAL INFORMATION (TAC NOS. MC4694 AND MC4695)

On April 20, 2010, a Category 1 public teleconference was held between the U.S. Nuclear Regulatory Commission (NRC) and representatives of Dominion Nuclear Connecticut, Inc.

(DNC). The purpose of the meeting was to discuss remaining issues identified during NRC staff review of the Millstone Power Station, Unit Nos. 2 and 3 (MPS2 and MPS3, respectively)

Generic Letter (GL) 2004-02, "Potential Impact of Debris Blockage on Emergency Recirculation during Design Basis Accidents at Pressurized-Water Reactors," supplemental response. The meeting was a follow-up to the April 8, 2010, Category 1 public teleconference on the same subject. A summary of the April 8, 2010, meeting can be found at Agencywide Documents Access and Management System (ADAMS) Accession No. ML101170575.

The meeting was intended to give DNC the opportunity to explain its proposed approach for responding to the NRC staff's request for additional information (RAI) dated February 4, 2010 (ADAMS Accession No. ML100070068). The meeting was also intended to give the NRC staff the opportunity to provide feedback regarding the licensee's proposed approach and to provide a mechanism for the NRC and DNC to come to mutual agreement on the remaining steps toward resolution of the outstanding GL 2004-02 issues for MPS2 and MPS3 No proprietary information was discussed at the meeting. No members of the public were in attendance. A list of attendees is provided in the enclosure.

The licensee provided draft responses to the NRC staff's RAI dated April 8, 2010 (ADAMS Accession No. ML1009804150).

The following summarizes the discussion of each proposed response discussed at the April 20, 2010, meeting:

1.0 Millstone Power Station, Unit NO.2 1.1 Request For Additional Information No. 14 The NRC staff does not agree with DNC's calcium phosphate solubility argument; however, the NRC staff believes that there is enough conservatism in ONC's testing to preclude the need for the calcium phosphate solubility argument. DNC intends to remove the calcium solubility argument from its response and focus the response on the existing conservatisms in the calculation that determined the amount of plant-specific

-2 dissolved calcium. ONC agreed to provide a new draft response to this request for additional information. This new draft response will be discussed at a future public teleconference.

1.2 Request For Additional Information No. 15 The NRC staff stated the proposed response is acceptable.

2.0 Millstone Power Station, Unit No.3 2.1 Request For Additional Information NO.6 In response to a question from ONC, the NRC staff stated that applying conservatisms to demonstrate the Rig 33 test results are acceptable for MPS3 is an acceptable approach to resolve the remaining issues associated with this request for additional information.

ONC agreed to provide a new draft comprehensive response to this request for additional information. This new draft response will be discussed at a future public teleconference.

2.2 Request For Additional Information No. 16 The NRC staff does not agree with ONC's calcium phosphate solubility argument; however, the NRC staff believes that there is enough conservatism in ONC's testing to preclude the need for the calcium phosphate solubility argument. ONC intends to remove the calcium solubility argument from its response and focus the response on the existing conservatisms in the calculation that determined the amount of plant-specific dissolved calcium. ONC agreed to provide a new draft response to this request for additional information. This new draft response will be discussed at a future public teleconference.

2.3 Request For Additional Information No. 17 The NRC staff stated the proposed response is acceptable.

-3 If you have any questions, please contact me at 301-415-1603.

Sinx,el Y,

{JJ Carleen J. Sande ,Project Manager Plant Licensing r nch 1-2 Division of Oper ng Reactor Licensing Office of Nuclear Reactor Regulation Docket l\Ios. 50-336 and 50-423

Enclosure:

As stated cc w/encls: Distribution via Listserv

LIST OF ATTENDEES APRIL 20,2010, MEETING WITH DOMINION NUCLEAR CONNECTICUT, INC. (DNC)

MILLSTONE POWER STATION, UNIT NOS. 2 AND 3 GENERIC LETTER 2004-02 SUPPLEMENTAL RESPONSE William Bartron Martin Legg Clark Maxson Ronald Tooker Gary Nayler Joseph Rigatti NRC Lawrence Doerflein, RI Paul Klein, NRR Carleen Sanders, NRR Michael Scott, I\lRR Stephen Smith, NRR Robert Taylor, NRR Mathew Yoder, NRR Enclosure

-3 If you have any questions, please contact me at 301-415-1603.

Sincerely,

/raj Carleen J. Sanders, Project Manager Plant Licensing Branch 1-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-336 and 50-423

Enclosure:

As stated cc w/encls: Distribution via Listserv DISTRIBUTION:

PUBLIC Branch Reading RidsAcrsAcnw_MailCTR Resource RidsNrrDorlLpll-2 Resource RidsOgcRp Resource RidsNrrPMMilistone Resource RidsNrrLAABaxter Resource RidsRgnlMailCenter Resource LTrocine, EDO Region 1 CSteger, NRR SSmith, NRR MScott, NRR PKlein, NRR MYoder, NRR JLehning, NRR ADAMS Accession Nos.: Meeting Notice; Meeting Handout IVIL 1009804150; Meeting Summary ML101250623 OFFICE DORLlLPL1-2/PM DORLlLPL1-2/LA NRR/SSIB/BC DORLlLPL1-2/BC NAME CSanders ABaxter MScott HChernof DATE 5/18/10 5/18/10 5/24/10 5/24/10 Official Record Copy