ML15106A928

Clinton Power Station, Unit 1 - Request for Additional Information Regarding License Amendment Request to Revise Technical Specification 5.5.2, :Primary Coolant Sources Outside Containment (TAC No. MF5291)

ML15106A928
Person / Time
Site:	Clinton
Issue date:	04/24/2015
From:	Purnell B A Plant Licensing Branch III
To:	Bryan Hanson Exelon Generation Co
Blake Purnell, NRR/DORL
References
TAC MF5291
Download: ML15106A928 (4)

Text

UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 Mr. Bryan C. Hanson Senior Vice President Exelon Generation Company, LLC President and Chief Nuclear Officer Exelon Nuclear 4300 Winfield Road Warrenville, IL 60555 lpril 2015

SUBJECT:

CLINTON POWER STATION, UNIT 1 -REQUEST FOR ADDITIONAL INFORMATION REGARDING LICENSE AMENDMENT REQUEST TO REVISE TECHNICAL SPECIFICATION 5.5.2, "PRIMARY COOLANT SOURCES OUTSIDE CONTAINMENT" (TAC NO. MF5291)

Dear Mr. Hanson:

By application dated November 17, 2014 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML 14321A882), Exelon Generation Company, LLC (the licensee) submitted a request to revise Technical Specification (TS) 5.5.2, "Primary Coolant Sources Outside Containment," for Clinton Power Station (CPS), Unit 1. Currently, TS 5.5.2 requires that an integrated leak test be performed on each system subject to TS 5.5.2 at refueling cycle intervals or less. The proposed change would require this test to be performed at least once per 24 months. The reason for the request is to support the CPS transition from 2-year to 1-year refueling cycles. The U.S. Nuclear Regulatory Commission staff is reviewing the application and has determined that additional information is needed to complete its review. A response to the enclosed request should be provided by June 19, 2015. This request was discussed with Mr. Tim Byam of your staff on April 22, 2015.

B. Hanson Should you have any questions, please contact me at 301-415-1380 or by email at blake.purnell@nrc.gov.

Docket No. 50-461

Enclosure:

Request for Additional Information cc w/encl: Listserv Sincerely, Blake Purnell, Project Manager Plant Licensing 111-2 and Planning and Analysis Branch Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation REQUEST FOR ADDITIONAL INFORMATION LICENSE AMENDMENT REQUEST TO REVISE TECHNICAL SPECIFICATION 5.5.2, "PRIMARY COOLANT SOURCES OUTSIDE CONTAINMENT" CLINTON POWER STATION, UNIT 1 DOCKET NO. 50-461 By application dated November 17, 2014 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML 14321A882), Exelon Generation Company, LLC (the licensee) submitted a request to revise Technical Specification (TS) 5.5.2, "Primary Coolant Sources Outside Containment," for Clinton Power Station (CPS), Unit 1. The reason for the request is to support the CPS transition from 2-year to 1-year refueling cycles. Currently, TS 5.5.2 requires that an integrated leak test be performed on each system subject to TS 5.5.2 at refueling cycle intervals or less. The proposed change would require this test to be performed at least once per 24 months. The U.S. Nuclear Regulatory Commission staff is reviewing the application and has determined that the additional information below is needed to complete its review. RAl-1 Provide the integrated leak test data for each system under TS 5.5.2 for the last two outages, including the test acceptance criterion, test pressure, as-found and as-left test leakage rate, and failed components.

RAl-2 Provide justification why the proposed "Refueling Only Outage" will not significantly impact the leakage pathways and associated leakage rates for each system under TS 5.5.2. Enclosure B. Hanson Should you have any questions, please contact me at 301-415-1380 or by email at blake.purnell@nrc.gov.

Docket No. 50-461

Enclosure:

Request for Additional Information cc w/encl: Listserv DISTRIBUTION:

Sincerely, /RAJ Blake Purnell, Project Manager Plant Licensing 111-2 and Planning and Analysis Branch Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation PUBLIC RidsNrrPMClinton RidsN rrDssScvb LPL3-2 R/F RidsAcrsAcnwMailCenter RidsNrrDorllpl3-2 BPurnell RidsRgn3MailCenter RidsNrrLASRohrer RidsNrrDssStsb SPeng KWest ADAMS Accession No.:ML 15106A928

• via memo OFFICE LPL3-2/PM LPL3-2/LA SCVB/BC* LPL3-2/BC LPL3-2/PM NAME BPurnell SRohrer RDennig TTate BPurnell DATE 4/23/15 4/20/15 3/30/15 4/24/15 4/24/15 OFFICIAL RECORD COPY