ML14070A078

& 03/04/2014, Summary of Telephone Conference Call Held Between Nuclear Regulatory Commission and Union Electric Company (Ameren Missouri), Pertaining to the Callaway Plant Unit 1, License Renewal Application RAI Set 31

ML14070A078
Person / Time
Site:	Callaway
Issue date:	04/07/2014
From:	Daily J License Renewal Projects Branch 1
To:
Daily J
References
TAC ME7708
Download: ML14070A078 (5)

Text

LICENSEE.

FACILITY

SUBJECT:

UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 April?, 2014 Union Electric Company d/b/a Ameren Missouri Callaway Plant, Unit 1

SUMMARY

OF TELEPHONE CONFERENCE CALL HELD ON FEBRUARY 27 AND MARCH 4, 2014, BETWEEN THE U.S. NUCLEAR REGULATORY COMMISSION AND UNION ELECTRIC COMPANY (AMEREN MISSOURI),

PERTAINING TO THE CALLAWAY PLANT, UNIT 1, LICENSE RENEWAL APPLICATION REQUEST FOR ADDITIONAL INFORMATION SET 31 (TAC. NO. ME7708)

The U.S. Nuclear Regulatory Commission (NRC or the staff) and representatives of Union Electric Company (Ameren Missouri or the applicant) held a telephone conference call on February 27 and March 4, 2014, to discuss and clarify the requests for additional information (RAts) presented in RAI Set 31 relating to the review of the Callaway Plant Unit 1, license renewal application. provides a listing of the participants and Enclosure 2 contains a description of the staff concerns discussed with the applicant. The participants agreed that the calls were useful in clarifying the RAis.

The applicant had an opportunity to comment on this summary.

~~~ager Projects Branch 1 Division of License Renewal Office of Nuclear Reactor Regulation Docket No. 50-483

Enclosures:

1. List of Participants

2. Summary of the Discussion cc w/encls: Listserv

• ML14070A078 IRA/

John Daily, Sr. Project Manager Projects Branch 1 Division of License Renewal Office of Nuclear Reactor Regulation

• concurred via email OFFICE LA:RPB1 :DLR PM:RPB1 :DLR BC:RPB1 :DLR PM:RPB1 :DLR NAME I King J Daily Diaz Sanabria J Daily DATE 3/13/14 3/18/14 3/18/14 4/7/14

SUMMARY

OF TELEPHONE CONFERENCE CALL HELD ON FEBRUARY 27 AND MARCH 4, 2014, BETWEEN THE U.S. NUCLEAR REGULATORY COMMISSION AND UNION ELECTRIC COMPANY (AMEREN MISSOURI),

PERTAINING TO THE CALLAWAY PLANT, UNIT 1, LICENSE RENEWAL APPLICATION REQUEST FOR ADDITIONAL INFORMATION SET 31 (TAG. NO. ME7708)

DISTRIBUTION HARD COPY:

DLR RF E-MAIL:

PUBLIC RidsNrrDir Resource RidsNrrDirRpb1 Resource RidsNrrDirRarb Resource RidsNrrDirRasb Resource RidsNrrPMCallway Resource JDaily FLyons YDiaz BMizuno (OGC)

GPick (RIV)

PARTICIPANTS John Daily Bill Holston John Wise Chris Hovanec Dave Shafer Roger Wink Andrew Burgess Sarah Merciel Lee Eitel Roger Andreasen Justin Stollhans Mike Whitehead Sam Cantrell Eric Blocher Ken Bryant

SUMMARY

OF TELEPHONE CONFERENCE CALL CALLAWAY PLANT, UNIT 1 LICENSE RENEWAL APPLICATION LIST OF PARTICIPANTS February 27 and March 4, 2014 AFFILIATIONS U.S. Nuclear Regulatory Commission (NRC)

NRC NRC NRC Union Electric Company (Ameren Missouri)

Ameren Missouri Ameren Missouri Ameren Missouri Ameren Missouri Ameren Missouri Ameren Missouri Ameren Missouri Ameren Missouri STARS Center of Business STARS Center of Business ENCLOSURE 1

SUMMARY

OF TELEPHONE CONFERENCE CALL CALLAWAY PLANT, UNIT 1 LICENSE RENEWAL APPLICATION REQUEST FOR ADDITIONAL INFORMATION SET 31 February 27 and March 4, 2014 The U.S. Nuclear Regulatory Commission {NRC or the staff) and representatives of Union Electric Company (Ameren Missouri or the applicant) held a telephone conference to discuss and clarify the requests for additional information (RAis) presented in RAI Set 31 relating to the review of the Callaway Plant, Unit 1, license renewal application (LRA).

RAI issues discussed RAis 3.0.3-4a, 3.0.3-5a, and 3.0.3-6: It was agreed by staff and Ameren that these three RAis pertain mostly to minor clarifications, and Ameren agreed to include responses to the issues as a part of its response currently in production and due to be submitted on March 13, 2014. Ameren stated that the responses would resolve the questions, and the staff agreed to place these on "hold" pending receipt of that package. If the March 13, 2014, package adequately addresses these three RAis then it was agreed that they would not need to be issued and the RAis would be dropped.

RAI 3.0.3-3a, Firewater system (Follow-up): The staff explained its concerns in the following areas: {a) the basis given for the exception lacks sufficient detail to show that the listed alternative tests and inspections are capable of detecting potential flow blockage in system risers; (b) the applicant's earlier RAI response appears to state that only 20 percent of the piping will be inspected at 5-year intervals during the period of extended operation, yet the staff's position is that, for portions of the fire water system that are periodically subject to flow, designed to be normally dry, and do not drain, reasonable assurance that flow blockage has not occurred would necessitate that inspections or tests ought to be conducted on 100 percent of these portions, every 5 years commencing 5 years prior to the period of extended operation; and {c) the staff is concerned that while flushes of firewater system piping can detect corrosion products, they cannot detect the presence of tubercules or other similar internal degradation; furthermore, a minimum amount of piping to be inspected was not stated.

RAI 3.3.2-2a, Submerged bolting {Follow-up): Regarding Issue #1 and Request #1, the applicant stated that as a part of its license amendment for implementing NFPA-805, the raw water pumps in the Fire Protection System had been removed from the scope of license renewal, as indicated in its response letter dated February 14, 2014.

Regarding Issue #2 and Request #2, the staff explained its concerns with Ameren's position that managing the aging effects of the service water pump and its closure bolting is not required. The staff stated that while much of a pump is active, several key pump parts (e.g.. casings, closure bolting) are passive, potentially long-lived, and provide a license renewal function; the staff also observed that these parts, particularly casing bolts, could be retained and re-used as part of a refurbishment yet not adequately age managed.

ENCLOSURE 2