ML14295A012

NRR E-mail Capture - Draft Quad Cities, Units 1 and 2- Third Draft RAI for LAR Request Battery Surveillance SRs (TAC Nos. MF4589 and MF4590)

ML14295A012
Person / Time
Site:	Quad Cities
Issue date:	10/21/2014
From:	Mozafari B Division of Operating Reactor Licensing
To:	Nicely K Exelon Corp
References
MF4589, MF4590
Download: ML14295A012 (3)

Text

NRR-PMDAPEm Resource From: Mozafari, Brenda Sent: Tuesday, October 21, 2014 5:16 PM To: Nicely, Ken M.:(GenCo-Nuc) (ken.nicely@exeloncorp.com)

Cc: Simpson, Patrick R.:(GenCo-Nuc) (patrick.simpson@exeloncorp.com); Tate, Travis; Purnell, Blake

Subject:

Draft QUAD CITIES, UNITS 1 AND 2- THIRD DRAFT RAI for LAR request re: battery surveillance SRs (TAC NOS. MF4589 AND MF4590)

Ken,

SUBJECT:

QUAD CITIES NUCLEAR POWER STATION, UNITS 1 AND 2 -THIRD DRAFT REQUEST FOR ADDITIONAL INFORMATION REGARDING LICENSE AMENDMENT REQUEST TO REVISE BATTERY SURVEILLANCE REQUIREMENTS (TAC NOS. MF4589 AND MF4590)

By application dated June 10, 2013 (Agencywide Documents Access and Management System (ADAMS)

Accession No. ML13161A315), Exelon Generation Company, LLC (EGC, the licensee) submitted an amendment to revise the Renewed Facility Operating License for Quad Cities Nuclear Power Station, Units 1 and 2. The proposed change would modify the Technical Specifications Surveillance Requirement (SR) 3.8.4.2 and SR 3.8.4.5 by adding new acceptance criteria for total battery connection resistance. In response to the NRC staffs requests for additional information (RAIs), the licensee provided supplemental information in letters dated October 24, 2013 and March 5, 2014 (ADAMS Accession Nos. ML13297A266 and ML14064A527).

During our September 11, 2014, clarification call for RAIs sent on January 24, 2014 (ADAMS ML14027A316),

the NRC staff agreed to provide this revised draft RAI (attached below) which you agreed respond to within 45 days of receipt. Your written response should be provided to the me within 45 days of this emailed RAI request.

REQUEST FOR ADDITIONAL INFORMATION REGARDING QUAD CITIES NUCLEAR POWER STATION, UNITS 1 AND 2 - LICENSE AMENDMENT REQUEST TO REVISE BATTERY SURVEILLANCE REQUIREMENTS DOCKET NOS.

50-254 and 50-265 The NRC staff has the following questions based on its review of the Exelon Generation Company, LLC license amendment request (LAR) dated June 10, 2013, as supplemented by letters dated October 24, 2013 and March 5, 2014, regarding the proposed revision to battery Technical Specification (TS) surveillance requirements (SR).

The licensee proposed adding to TS SR 3.8.4.2 and SR 3.8.4.5 the following new acceptance criterion to verify that the total battery connection resistance is within pre-established limits, which ensures that the batteries can perform their specified safety functions by maintaining required battery terminal voltage under design-basis load conditions:

1. 2.4E-3 ohms for each 125 VDC subsystem, and

2. 6.0E-3 ohms for each 250 VDC subsystem.

In its response letter dated October 24, 2013, the licensee stated that the above proposed total battery connection resistance limits are the operability limits of the overall battery resistance.

To determine the acceptability of the proposed TS total battery connection resistance limits, the NRC staff requests that the licensee:

1

1. Provide a summary of the calculation which demonstrates that the proposed TS total connection resistance limiting values (i.e., 2.4E-3 ohms and 6.0E-3 ohms) will maintain the required minimum voltages (i.e., 105 VDC for the 125 VDC batteries and 210 VDC for the 250 VDC for the 250 VDC batteries) at the batteries terminals under worst-case design basis loading conditions.

2. Provide the margins available between the proposed TS total connection resistance limiting values and the overall battery resistances for maintaining the required minimum voltages for the 125 VDC and 250 VDC batteries.

The NRC staff considers that timely responses to requests for additional information help ensure sufficient time is available for staff review and contribute toward the NRCs goal of efficient and effective use of staff resources. If circumstances result in the need to revise the requested response date, please contact me at (301) 415-2020.

Brenda L. Mozafari Senior Project Manager, NRR/DORL U.S. Nuclear Regulatory Commission Dresden 2/3 and Quad Cities 1/2 301-415-2020 email: brenda.mozafari@nrc.gov 2

Hearing Identifier: NRR_PMDA Email Number: 1650 Mail Envelope Properties (Brenda.Mozafari@nrc.gov20141021171500)

Subject:

Draft QUAD CITIES, UNITS 1 AND 2- THIRD DRAFT RAI for LAR request re:

battery surveillance SRs (TAC NOS. MF4589 AND MF4590)

Sent Date: 10/21/2014 5:15:38 PM Received Date: 10/21/2014 5:15:00 PM From: Mozafari, Brenda Created By: Brenda.Mozafari@nrc.gov Recipients:

"Simpson, Patrick R.:(GenCo-Nuc) (patrick.simpson@exeloncorp.com)"

<patrick.simpson@exeloncorp.com>

Tracking Status: None "Tate, Travis" <Travis.Tate@nrc.gov>

Tracking Status: None "Purnell, Blake" <Blake.Purnell@nrc.gov>

Tracking Status: None "Nicely, Ken M.:(GenCo-Nuc) (ken.nicely@exeloncorp.com)" <ken.nicely@exeloncorp.com>

Tracking Status: None Post Office:

Files Size Date & Time MESSAGE 3805 10/21/2014 5:15:00 PM Options Priority: Standard Return Notification: No Reply Requested: Yes Sensitivity: Normal Expiration Date:

Recipients Received: