ML15127A624

Request for Additional Information Related to Extension of Type C Test Interval (TAC No. MF5433)(L-14-407)

ML15127A624
Person / Time
Site:	Davis Besse
Issue date:	05/20/2015
From:	Blake Purnell Plant Licensing Branch III
To:	Lieb R FirstEnergy Nuclear Operating Co
Blake Purnell, NRR/DORL
References
L-14-407, TAC MF5433
Download: ML15127A624 (3)

Text

UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 May 20, 2015 Mr. Raymond A Lieb Site Vice President FirstEnergy Nuclear Operating Company Mail Stop A-DB-3080 5501 North State, Route 2 Oak Harbor, OH 43449-9760

SUBJECT:

DAVIS-BESSE NUCLEAR POWER STATION, UNIT NO. 1 - REQUEST FOR ADDITIONAL INFORMATION RELATED TO EXTENSION OF TYPE C TEST INTERVAL (TAC NO. MF5433)(L-14-407)

Dear Mr. Lieb:

By application dated December 19, 2014 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML 114353A349}, FirstEnergy Nuclear Operating Company (FENOC) submitted a license amendment request for the Davis-Besse Nuclear Power Station, Unit No. 1. The proposed amendment revises the technical specifications (TS) to adopt performance-based Type C testing for the reactor containment, which will allow for extended test intervals for Type C valves up to 75 months with a nonroutine extension to 84 months, and corrects an editorial issue in the TS. The U.S. Nuclear Regulatory Commission (NRC) staff is reviewing your submittal and has determined that additional information is required to complete the review. The specific information requested is addressed in the enclosure to this letter.

During a discussion with Mr. Phil Lashley of your staff on May 12, 2015, it was agreed that you would provide a response within 40 days from the date this letter is electronically distributed.

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 NRC's 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) 415-1380.

Sincerely, Blake Purnell, Project Manager Plant Licensing 111-2 and Planning and Analysis Branch Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No. 50-346

Enclosure:

Request for Additional Information cc w/encl: Distribution via Listserv

REQUEST FOR ADDITIONAL INFORMATION EXTENSION OF TYPE C TESTING DAVIS-BESSE NUCLEAR POWER STATION UNIT NO. 1 FIRSTENERGY NUCLEAR OPERATING COMPANY DOCKET NO. 50-346

1. Provide the combined Type B and C as-found minimum pathway totals going back eight years.

2. In Section 3.1.2 on page 4 of 8 of the December 19, 2014, submittal, FENOC describes the response to Condition 1 of the letter dated May 8, 2012, providing the approval for topical report Nuclear Energy Institute (NEI) 94-01, Revision 3-A. The response indicates that Davis-Besse will meet the condition by performing Type C testing in accordance with NEI 94-01, Revision 3-A.

a. Address whether the post-outage report will include the margin between the Type Band Type C minimum pathway leak rate summation value as adjusted to include the estimate of applicable Type C leakage understatement and its Technical Specification performance criterion of 0.6 La (maximum allowable containment leakage rate).

b. Address how FENOC intends to apply the 9-month grace period to eligible Type C components for unanticipated emergent conditions.

c. Describe those actions that would be taken should Davis-Besse need to restore margin to an acceptable level.

3. In Section 3.1.2 on page 5 of 8 of the December 19, 2014, submittal, FENOC describes the Davis-Besse response to Condition 2 of the letter dated May 8, 2012, providing the approval for topical report NEI 94-01, Revision 3-A. The response indicates that Davis-Besse will meet the condition by performing Type C testing in accordance with NEI 94-01, Revision 3-A. Describe how any potential leakage understatement of the local leak rate testing totals will be conservatively applied.

May 20, 2015 Mr. Raymond A. Lieb Site Vice President FirstEnergy Nuclear Operating Company Mail Stop A-DB-3080 5501 North State, Route 2 Oak Harbor, OH 43449-9760

SUBJECT:

DAVIS-BESSE NUCLEAR POWER STATION, UNIT NO. 1 - REQUEST FOR ADDITIONAL INFORMATION RELATED TO EXTENSION OF TYPE C TEST INTERVAL (TAC NO. MF5433)(L-14-407)

Dear Mr. Lieb:

By application dated December 19, 2014 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML 114353A349), FirstEnergy Nuclear Operating Company (FENOC) submitted a license amendment request for the Davis-Besse Nuclear Power Station, Unit No. 1. The proposed amendment revises the technical specifications (TS) to adopt performance-based Type C testing for the reactor containment, which will allow for extended test intervals for Type C valves up to 75 months with a nonroutine extension to 84 months, and corrects an editorial issue in the TS. The U.S. Nuclear Regulatory Commission (NRC) staff is reviewing your submittal and has determined that additional information is required to complete the review. The specific information requested is addressed in the enclosure to this letter.

During a discussion with Mr. Phil Lashley of your staff on May 12, 2015, it was agreed that you would provide a response within 40 days from the date of this letter is electronically distributed.

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 NRC's 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) 415-2315.

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 Docket No. 50-346

Enclosure:

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

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DATE 5/20/15 5 /20/15 04/29/15 5/20/15 OFFICIAL RECORD COPY