ML15068A421

Request for Additional Information Regarding Relief Request 13R-11

ML15068A421
Person / Time
Site:	Clinton
Issue date:	04/16/2015
From:	Purnell B A Plant Licensing Branch III
To:	Bryan Hanson Exelon Generation Co, Exelon Nuclear
Blake Purnell, NRR/DORL
References
TAC MF5334
Download: ML15068A421 (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 April 16, 2015

SUBJECT:

CLINTON POWER STATION, UNIT 1 -REQUEST FOR ADDITIONAL INFORMATION REGARDING RELIEF REQUEST 13R-11 (TAC NO. MF5334)

Dear Mr. Hanson:

By application dated December 1, 2014 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML 14335A539), Exelon Generation Company, LLC (the licensee) submitted a request in accordance with Paragraph 50.55a(a)(3)(i) of Title 10 of the Code of Federal Regulations for a proposed alternative to the requirements of the American Society of Mechanical Engineers, "Code for Operation and Maintenance of Nuclear Power Plants," Boiler and Pressure Vessel Code,Section XI, 2004 Edition and no addenda for Clinton Power Station (CPS), Unit 1. The proposed alternative would permit the licensee to perform inservice testing of Code Class 1, 2, and 3 snubbers every 2 years or every other refueling outage in lieu of the requirement to perform testing every refueling outage. The reason for the request is to support the CPS transition from 2-year to 1-year refueling cycles. The NRG staff has reviewed the relief request and determined that it needs additional information to complete its review. A response to the enclosed request for additional information should be provided by within 45 days from the date of this letter. The information requested was discussed during a public meeting with your staff on February 23, 2015 (ADAMS Accession No. ML 15072A425).

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 RELIEF REQUEST 13R-11 CLINTON POWER STATION, UNIT 1 TAC NO. MF5334 By application dated December 1, 2014 (Agencywide Documents Access and Management System Accession No. ML 14335A539), Exelon Generation Company, LLC (the licensee) submitted a request in accordance with Paragraph 50.55a(a)(3)(i) of Title 10 of the Code of Federal Regulations for a proposed alternative to the requirements of the American Society of Mechanical Engineers (ASME), Code for Operation and Maintenance of Nuclear Power Plants (OM Code), and ASME Boiler and Pressure Vessel (B&PV) Code,Section XI, 2004 Edition and no addenda for Clinton Power Station (CPS), Unit 1. The proposed alternative would permit the licensee to perform inservice testing of Code Class 1, 2, and 3 snubbers every 2 years or every other refueling outage in lieu of the requirement to perform testing every refueling outage. The reason for the request is to support the CPS transition from 2-year to 1-year refueling cycles. The NRC staff has reviewed the relief request and determined that it needs additional information to complete its review. Request for Additional Information

1) The submitted relief request is for the third 10-year inservice inspection (ISi) interval at CPS. Provide the start and end dates of the third 10-year ISi interval.

2) The relief request states that the proposed alternative to the snubber testing requirements in ASME B&PV Code,Section XI, and Section ISTD-5200 of the ASME OM Code is to test every 2 years or every other refueling outage. This implies that CPS has a choice of testing frequencies, such that if the refueling outage schedules change the interval between snubber tests may exceed 2 years. Provide justification for the proposed testing of every other refueling outage given that CPS is not limited to a 12-month refueling cycle. 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, IRA! 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 RidsNrrDeEpnb LPL3-2 R/F RidsAcrsAcnwMailCenter RidsNrrDorllpl3-2 RidsRgn3MailCenter RidsNrrLASRohrer BPurnell GBedi, NRR ADAMS Accession No.:ML 15068A421 OFFICE LPL3-2/PM LPL3-2/LA EPNB/BC LPL3-2/BC LPL3-2/PM NAME BPurnell SRohrer DAiiey TTate BPurnell DATE 4/15/15 3/25/15 3/30/15 4/14/15 4/16/15 OFFICIAL RECORD COPY