ML12025A051

Summary of Telephone Conference Call Held on January 18, 2012, Between the U.S. Nuclear Regulatory Commission and Exelon Generation Company, LLC, Concerning Request for Additional Information Pertaining to the Limerick Generation 1-18-12 Te

ML12025A051
Person / Time
Site:	Limerick
Issue date:	04/20/2012
From:	Robert Kuntz License Renewal Projects Branch 1
To:	Exelon Generation Co
Kuntz R
References
TAC ME6555, TAC ME6556
Download: ML12025A051 (7)

Text

UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555*0001 April 20, 2012 LICENSEE: Exelon Generation Company, LLC FACILITY: Limerick Generating Station

SUMMARY

OF TELEPHONE CONFERENCE CALL HELD ON JANUARY 18, 2012, BE1WEEN THE U.S. NUCLEAR REGULATORY COMMISSION AND EXELON GENERATION COMPANY, LLC, CONCERNING REQUESTS FOR ADDITIONAL INFORMATION PERTAINING TO THE LIMERICK GENERATING STATION, LICENSE RENEWAL APPLICATION (TAC. NOS. ME6555 AND ME6556)

The U.S. Nuclear Regulatory Commission (NRC or the staff) and representatives of Exelon Generation Company, LLC held a telephone conference call on January 18, 2012, to discuss and clarify the staff's requests for additional information (RAls) concerning the Limerick Generating Station, license renewal application. The telephone conference call was useful in clarifying the intent of the staff's RAls. provides a listing of the participants and Enclosure 2 contains a listing of the RAls discussed with the applicant, including a brief description on the status of the items.

The applicant had an opportunity to comment on this summary.

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<:~:~c!12tz, Projects Branch 1 Senior Project Manager Division of License Renewal Office of Nuclear Reactor Regulation Docket Nos. 50-352 and 50-353

Enclosures:

1. List of Participants

2. List of Requests for Additional Information cc w/encls: Listserv

TELEPHONE CONFERENCE CALL LIMERICK GENERATING STATION LICENSE RENEWAL APPLICATION LIST OF PARTICIPANTS January 18, 2011 PARTICIPANTS AFFILIATIONS Robert Kuntz Nuclear Regulatory Commission (NRC)

Naeem Iqbal NRC Gene Kelly Exelon Generation Company, LLC (Exelon)

Christopher Wilson Exelon Albert Fulvio Exelon Ron Hess Exelon Dave Clohecy Exelon ENCLOSURE 1

ORAl 2.3.3.9-1 The staff notes that license renewal boundary drawing LR-M-22, Sheet 5, at location F3, shows the cable spreading room's fire walls and associated components including fire doors, fire dampers, and penetration seals as out of scope (Le., not colored in green). The staff requests that the applicant verify whether the cable spreading rooms fire walls and associated components are in the scope of license renewal in accordance with 10 CFR 54.4(a) and whether they are subject to an aging management review (AMR) in accordance with 10 CFR 54.21 (a)(1). The staff requested that, if these fire walls and associated components are excluded from the scope of license renewal and are not subject to an AMR, the applicant provide justification for the exclusion.

Discussion: The applicant indicated that the request is clear. This ORAl will be sent as a formal RAI.

ORAl 2.3.3.9-2 The following license renewal application (LRA) boundary drawings shows the following fire protection systems/components as out of scope (i.e., not colored in green):

LRA Drawing Systems/Coml2onents Location Fire water suppression systems associated with LR-M-22, Sheet 2 Safeguard Transformer (OAX103), Auxiliary H3 Transformer (10X102), and Spare Transformer (10X101)

Fire water suppression systems associated with LR-M-22, Sheet 2 Unit 1 Main Transformers (1AX101), (1BX101), and H4 (1CX101)

Fire water suppression systems associated with LR-M-22, Sheet 4 Safeguard Transformer (OBX1 03), and Auxiliary H3 Transformer (20X 102)

Fire water suppression systems associated with LR-M-22, Sheet 4 Unit 2 Main Transformers (2AX101), (2BX101), and H3 (2CX1 01)

The staff requests that the applicant verify whether the fire protection systems/components listed above are in the scope of license renewal in accordance with 10 CFR 54.4(a) and whether they are subject to an AMR in accordance with 10 CFR 54.21(a)(1). If they are excluded from the scope of license renewal and are not subject to an AMR, the staff requests that the applicant provide justification for the exclusion.

Discussion: The applicant clarified on the conference call that the drawings did not indicate structures within the scope of license renewal and that items discussed in the RAI are included in the scope of license renewal. The staff verified in the drawings that the drawings specifically noted that structures were not colored to annotate inclusion within the scope of license renewal and also verified the description in the LRA was adequate. Therefore, the staff will not issue this ORAl because sufficient information exist on the docket to satisfy the staff's concern.

ENCLOSURE 2

-2 ORAl 2.3.3.9-3 The source of water for the fire protection system at Limerick Generating Station, Units 1 and 2 is a pair of cooling tower basins, each of which has a capacity of 7,200,000 gallons. Section 9.5.1.6.7, Supplement No.2, NUREG-0991, "Safety Evaluation Report related to the operation of Limerick Generating Station, Units 1 and 2," dated October 1984, states that suction lines to the fire pump are arranged so that if one of the cooling towers becomes unavailable, the suction line can be switched to the functional tower.

The staff requests that the applicant verify whether the fire protection water supply components including suction lines to the fire pump and valves are in the scope of license renewal in accordance with 10 CFR 54.4(a) and subject to an AMR in accordance with 10 CFR 54.21(a)(1). If they are excluded from the scope of license renewal and not subject to an AMR, the staff requests that the applicant provide justification for the exclusion.

Discussion: The applicant clarified on the conference call that the drawings LR-M-9, Sheets 3, 8, and 9 highlight fire protection water supply components including suction lines to the fire pump and valves. The staff verified that the fire protection water supply components including suction lines to the fire pump and valves in question are highlighted and colored in green on the drawings LR-M-9, Sheets 3, 8, and 9. Therefore, the staff will not issue this ORAl because sufficient information exists on the docket to satisfy the staff's concern.

ORAl 2.3.3.9-4 LRA Tables 2.3.3-9 and 3.3.2-9 of the LRA do not include the following fire protection components:

• fire hose stations, fire hose connections, and hose racks

• fire protection water curtain systems in the reactor enclosures and hatchways

• floor drains for fire water

• passive components in fire protection water and foam solution storage tank heat exchangers

• fire dampers

• fire retardant coating (fireproofing material) for structural steel members

• passive components in diesel driven fire pump engine

• passive components in lighting plant protection system (NFPA 78, Lighting Protection Code)

The staff requests that the applicant verify whether the fire protection components listed above are in the scope of license renewal in accordance with 10 CFR 54.4(a) and whether they are subject to an AMR in accordance with 10 CFR 54.21 (a)(1). If they are excluded from the scope of license renewal and are not subject to an AMR, the staff requests that the applicant provide justification for the exclusion.

Discussion: The applicant indicated that the request is clear. This ORAl will be sent as a formal RAI. This RAI will be renumbered and will be issued as RAI 2.3.3.9-2 to account for the deletion of ORAl 2.3.3.9-2 and ORAl 2.3.3.9-3 as discussed above.

ORAl 2.3.3.9-5 Section 2.4, "Scoping and Screening Results: Structures," of the LRA provides the scoping and screening results of various structures within the scope of license renewal and subject to an AMR. Further, Section 2.4 states that the fire barriers are evaluated separately with the Fire Protection System, LRA Section 2.3.3.9. LRA Table 2.3.3.9, includes fire barriers (doors), fire barriers (fire rated enclosures), fire barriers (for steel components), fire barriers (penetration seals), fire barriers (walls and slabs), that are supject to an AMR. The staff requests that the applicant provide a summary of the list of buildings or structures where fire barriers are credited, and the specific types of barriers at these locations in the plant's fire protection program.

Discussion: The applicant indicated that the request is clear. This ORAl will be sent as a formal RAI. This RAI will be renumbered and will be issued as RAI 2.3.3.9-3 to account for the deletion of ORAl 2.3.3.9-2 and ORAl 2.3.3.9-3 as discussed above.

SUBJECT:

Summary of Telephone Conference Call conducted on December 13, 2011 DISTRIBUTION:

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LICENSEE: Exelon Generation Company, LLC FACILITY: Limerick Generating Station

SUMMARY

OF TELEPHONE CONFERENCE CALL HELD ON JANUARY 18, 2012, BETWEEN THE U.S. NUCLEAR REGULATORY COMMISSION AND EXELON GENERATION COMPANY, LLC, CONCERNING REQUESTS FOR ADDITIONAL INFORMATION PERTAINING TO THE LIMERICK GENERATING STATION, LICENSE RENEWAL APPLICATION (TAC. NOS. ME6555 AND ME6556)

The U.S. Nuclear Regulatory Commission (NRC or the staff) and representatives of Exelon Generation Company, LLC held a telephone conference call on January 18, 2012, to discuss and clarify the staff's requests for additional information (RAls) concerning the Limerick Generating Station, license renewal application. The telephone conference call was useful in clarifying the intent of the staff's RAls.

Enclosure 1 provides a listing of the participants and Enclosure 2 contains a listing of the RAls discussed with the applicant, including a brief description on the status of the items.

The applicant had an opportunity to comment on this summary.

IRA!

Robert F. Kuntz, Senior Project Manager Projects Branch 1 Division of License Renewal Office of Nuclear Reactor Regulation Docket Nos. 50-352 and 50-353

Enclosures:

1. List of Participants

2. List of Requests for Additional Information cc w/encls: Listserv DISTRIBUTION: See next page ADAMS Accession No ... ML12025a051 LA:RPB1:DLR PM:RPB1 :DLR BC:RPB1 :DLR PM:RPB1:DLR Ils!.FICE NAME YEdmonds RFKuntz DMorey RFKuntz DATE 04/13/12 04/13/12 04/13/12 04/20/12 OFFICIAL RECORD COpy