ML14169A441

Summary of Telephone Conference Call Held on April 21, 2014, Between the U.S. Nuclear Regulatory Commission and Union Electric Company (Ameren Missouri), Pertaining to the Callaway Plant, Unit 1, License Renewal Application (Tac. No. ME7708

ML14169A441
Person / Time
Site:	Callaway
Issue date:	07/03/2014
From:	Daily J License Renewal Projects Branch 1
To:
Daily J, 415-3873
References
TAC ME7708
Download: ML14169A441 (5)

Text

UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 July 3, 2014

LICENSEE: Union Electric Company (Ameren Missouri)

FACILITY: Callaway Plant, Unit 1

SUBJECT:

SUMMARY OF TELEPHONE CONFERENCE CALL HELD ON APRIL 21, 2014, BETWEEN THE U.S. NUCLEAR REGULATORY COMMISSION AND UNION ELECTRIC COMPANY (AMEREN MISSOURI), PERTAINING TO THE CALLAWAY PLANT, UNIT 1, LICENSE RENEWAL APPLICATION (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 April 21, 2014, to discuss draft request for additional information (RAI) 3.3.2.29-1, "Aging of concrete piping in the circulating water system (021)," for concrete piping added to the scope of license renewal in the applicant's Amendment 31 to its Callaway Plant, Unit 1 (Callaway),

license renewal application (LRA). Enclosure 1 provides a listing of the participants and Enclosure 2 contains a description of the items discussed. The participants agreed that the call was useful in clarifying the points of view.

The applicant had an opportunity to comment on this summary. /RA/ John Daily, Sr. Project Manager 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

ML14169A441 *concurred via email OFFICE LA:RPB1:DLR* PM:RPB1:DLR BC:RPB1:DLR PM:RPB:DLR NAME IKing JDaily YDiaz Sanabria JDaily DATE 6/23/14 7/3/14 7/3/14 7/3/14 ENCLOSURE 1 SUMMARY OF TELEPHONE CONFERENCE CALL CALLAWAY PLANT, UNIT 1 LICENSE RENEWAL APPLICATION LIST OF PARTICIPANTS April 21, 2014 PARTICIPANTS AFFILIATIONSJohn Daily U.S. Nuclear Regulatory Commission (NRC) Bill Holston NRC John Wise NRC Chris Hovanec NRC Dave Shafer Union Electric Company (Ameren Missouri)

Roger Wink Ameren Missouri Sharon Merciel Ameren Missouri Andrew Burgess Ameren Missouri Eric Blocher STARS Center of Business

ENCLOSURE 2 SUMMARY OF TELEPHONE CONFERENCE CALL CALLAWAY PLANT, UNIT 1 LICENSE RENEWAL APPLICATION April 21, 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 call on April 21, 2014, to discuss draft request for additional information (RAI) 3.3.2.29-1, "Aging of concrete piping in the circulating water system (021)," for concrete piping added to the scope of license renewal in the applicant's Amendment 31 to its Callaway Plant, Unit 1 (Callaway),

license renewal application (LRA).

Discussion The staff noted that Ameren Missouri submitted license renewal application (LRA) Amendment 31 by letter dated February 14, 2014, which added new sections and tables for the circulating water system as a new system within the scope of license renewal. It also added new aging management review items for circulating water system concrete piping which would be inspected using the applicant's Internal Surfaces in Miscellaneous Piping and Ducting Components and the External Surfaces Monitoring of Mechanical Components programs to manage aging effects.

The staff noted it was not clear on what inspection method(s) would be used for the "detection of aging effects," and what parameter(s) would be monitored for the "parameters monitored or inspected," program elements to address changes in material properties of internal and external surfaces of the concrete piping. In addition, the staff was unclear as to whether the mechanical aging management programs (AMPs) as proposed by the applicant included sufficient guidance for detection of the cited aging effects (cracking, loss of material, and changes in material properties) for concrete piping - which seemed to be more like structural components than piping components.

Some discussion was held as to whether the proposed AMPs represented the best fit for these concrete components.

The applicant indicated it would consider these points in light of the discussion and would request a follow-on conference call if needed.

SUBJECT:

SUMMARY OF TELEPHONE CONFERENCE CALL HELD ON APRIL 21, 2014, BETWEEN THE U.S. NUCLEAR REGULATORY COMMISSION AND UNION ELECTRIC COMPANY (AMEREN MISSOURI), PERTAINING TO THE CALLAWAY PLANT, UNIT 1, LICENSE RENEWAL APPLICATION (TAC. NO. ME7708)

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