ML15118A235

NRR E-mail Capture - Clinton Power Station, Unit 1 - Request for Additional Information Regarding Relief Request 2203

ML15118A235
Person / Time
Site:	Clinton
Issue date:	04/28/2015
From:	Blake Purnell Plant Licensing Branch III
To:	Byam T Exelon Corp
References
TAC MF5344
Download: ML15118A235 (3)

Text

NRR-PMDAPEm Resource From: Purnell, Blake Sent: Tuesday, April 28, 2015 8:58 AM To: Byam, Timothy Cc: Tate, Travis; patrick.simpson@exeloncorp.com

Subject:

Clinton Power Station, Unit 1 - Request for Additional Information Regarding Relief Request 2203 (TAC No. MF5344)

Attachments: Clinton RR 2203 RAI2.docx Mr. Tim Byam:

On December 1, 2014, Exelon Generation Company, LLC (the licensee) submitted relief request (RR) 2203 for Clinton Power Station (CPS), Unit 1 (Agencywide Documents Access and Management System (ADAMS)

Accession No. ML14335A541). The licensee provided supplemental information to support this RR by letter dated March 26, 2015 (ADAMS Accession No. ML15085A458).

RR 2203 was requested because CPS will transition to a 12-month fuel cycle beginning in the spring of 2015.

In the past, CPS has operated with a 24-month fuel cycle and the current cycle is scheduled to be 18-months ending this spring. The RR is a proposed alternative to the requirements of the American Society of Mechanical Engineers (ASME), Code for Operation and Maintenance of Nuclear Power Plants, 2004 Edition (OM Code), Subsections ISTC-3521(e), ISTC-3521(h), ISTC-3522(c), and ISTC-3522(f). These OM Code subsections require that ASME Class 1, 2, and 3 valves in an inservice testing cold shutdown justification (CSJ) or refueling justification (RFJ) be tested each refueling outage. The licensees proposed alternative is to test CSJ and RFJ valves every 2 years.

The NRC staff has reviewed the RR and supplemental response and determined that it needs additional information to complete its review. The licensee is requested to respond to the attached request for additional information by June 19, 2015. If you have any questions about this request, contact me at (301) 415-1380.

Sincerely, Blake Purnell, Project Manager Plant Licensing Branch III-2 and Planning and Analysis Branch Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Docket No. 50-461 1

Hearing Identifier: NRR_PMDA Email Number: 2026 Mail Envelope Properties (Blake.Purnell@nrc.gov20150428085700)

Subject:

Clinton Power Station, Unit 1 - Request for Additional Information Regarding Relief Request 2203 (TAC No. MF5344)

Sent Date: 4/28/2015 8:57:53 AM Received Date: 4/28/2015 8:57:00 AM From: Purnell, Blake Created By: Blake.Purnell@nrc.gov Recipients:

"Tate, Travis" <Travis.Tate@nrc.gov>

Tracking Status: None "patrick.simpson@exeloncorp.com" <patrick.simpson@exeloncorp.com>

Tracking Status: None "Byam, Timothy" <timothy.byam@exeloncorp.com>

Tracking Status: None Post Office:

Files Size Date & Time MESSAGE 1784 4/28/2015 8:57:00 AM Clinton RR 2203 RAI2.docx 24652 Options Priority: Standard Return Notification: No Reply Requested: No Sensitivity: Normal Expiration Date:

Recipients Received:

REQUEST FOR ADDITIONAL INFORMATION RELIEF REQUEST 2203 CLINTON POWER STATION, UNIT 1 TAC NO. MF5344 On December 1, 2014, Exelon Generation Company, LLC (the licensee) submitted relief request (RR) 2203 for Clinton Power Station (CPS), Unit 1 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML14335A541). The licensee provided supplemental information to support this RR by letter dated March 26, 2015 (ADAMS Accession No. ML15085A458).

RR 2203 was requested because CPS will transition to a 12-month fuel cycle beginning in the spring of 2015. In the past, CPS has operated with a 24-month fuel cycle and the current cycle is scheduled to be 18-months ending this spring. The RR is a proposed alternative to the requirements of the American Society of Mechanical Engineers (ASME), Code for Operation and Maintenance of Nuclear Power Plants, 2004 Edition (OM Code), Subsections ISTC-3521(e), ISTC-3521(h), ISTC-3522(c), and ISTC-3522(f). These OM Code subsections require that ASME Class 1, 2, and 3 valves in an inservice testing cold shutdown justification (CSJ) or refueling justification (RFJ) be tested each refueling outage. The licensees proposed alternative is to test CSJ and RFJ valves every 2 years.

The NRC staff has reviewed the RRs and determined that it needs additional information to complete its review.

Background

In its March 26, 2015, letter, the licensee states it reviewed the performance history of the 70 valves that are designated as RFJ valves. The letter stated:

Reactor Core Isolation Cooling [RCIC] System testable check valve (i.e., 1E51-F066) has experienced multiple failures with the last two in consecutive outages. This valve is in a position to be tested during "refueling only outages" in addition to "refueling/ maintenance outages." Until four consecutive years of tests are passed, this valve will be tested each refueling outage (i.e., 1 year test interval).

Request for Additional Information Describe how testing will change if an RFJ valve that is tested once every 2 yearsfailsa test.

The response should specify changes in test frequency and the number of consecutive passed tests required to returnthe valve to a 2-year test interval (i.e., information similar to what was provided for the RCIC system testable check valve above).