WBL-21-036, Supplement to the American Society of Mechanical Engineers, Section XI, First 10-Year Inspection Interval, Inservice Inspection Owner'S Activity Report for Cycle 3 Operation

Supplement to the American Society of Mechanical Engineers,Section XI, First 10-Year Inspection Interval, Inservice Inspection Owner'S Activity Report for Cycle 3 Operation

ML21217A050
Person / Time
Site:	Watts Bar
Issue date:	08/05/2021
From:	Anthony Williams Tennessee Valley Authority
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
WBL-21-036
Download: ML21217A050 (5)

Text

Post Office Box 2000, Spring City, Tennessee 37381 WBL-21-036 August 05, 2021 10 CFR 50.55a ATTN: Document Control Desk U.S. Nuclear Regulatory Commission Washington, D.C. 20555-0001 Watts Bar Nuclear Plant, Unit 2 Facility Operating License No. NPF-96 NRC Docket No. 50-391

Subject:

Supplement to the American Society of Mechanical Engineers,Section XI, First 10-Year Inspection Interval, lnservice Inspection Owner's Activity Report For Cycle 3 Operation

Reference:

TVA Letter to the NRC, WBL-21-008 American Society of Mechanical Engineers,Section XI, First 10-Year Inspection Interval, lnservice Inspection Owner's Activity Report For Cycle 3 Operation, dated February 11, 2021 (ML21042A021)

On February 11, 2021, the Watts Bar Nuclear Plant (WBN) Unit 2 submitted the American Society of Mechanical Engineers (ASME)Section XI, Owners Activity Report for Cycle 3 Operation (Reference). Subsequent review of this report shows that it did not document steam generator plugging activities, which are a repair and replacement activity in accordance with ASME Section XI Category B-Q, Item B16.20, and Plant Technical Specifications. Per ASME Code Case N-532-5, utilities are required to submit an abstract for repair/replacement activities that were required due to an item containing a flaw or relevant condition that exceeded Division 1 acceptance criteria.

The Table 2 provided in the Enclosure supersedes the Table 2 in the Referenced letter in its entirety. This issue has been entered into the Tennessee Valley Authority (TVA) corrective action program for resolution.

ENCLOSURE Tennessee Valley Authority Watts Bar Nuclear Plant Unit 2 Watts Bar Unit 2 Supplement Table 2: Abstract of Repair/Replacement Activities Required for Continued Service

FORM OAR-1 OWNERS ACTIVITY REPORT Report Number Supplement to Report Number U2R3 (Ref. CR 1677204)

Plant Watts Bar Nuclear Plant, P.O. Box 2000, Spring City, TN 37381-2000 Unit No. 2 Commercial Service Date October 19, 2016 Refueling Outage No. U2R3 (if applicable)

Current Inspection Interval 1st (1st, 2nd, 3rd, 4th, other)

Current Inspection Period 2nd (1st, 2nd, 3rd )

ISI/SPT - 2007 Edition, 2008 Addenda Edition and Addenda of Section XI applicable to the Inspection Plans IWE - 2013 Edition ISI - July 20, 2020 / 2-TRI-0-10.1, Revision 005 IWE - September 07, 2018 / 0-TI-100.012, Revision 000 Date / Revision of Inspection Plans SPT - August 24, 2020 / 0-TI-100.009 Revision 003 Edition and Addenda of Section XI applicable to repair/replacement activities, if different than the inspection plans 2007 Edition, 2008 Addenda Code Cases used: N-532-5, N-586-1, N-716-1, N-722-1, N-729-6, N-770-5 CERTIFICATE OF CONFORMANCE I certify that (a) the statements made in this report are correct; (b) the examinations and tests, meet the Inspection Plan as required by the ASME Code,Section XI; and (c) the repair/replacement activities and evaluations supporting the completion of U2R3 conform to the requirements of Section XI (refueling outage number)

Signed John Norman, Repair/Replacement program owner Date 7/22/21 Owner or Owners Designee, Title CERTIFICATE OF INSERVICE INSPECTION I, the undersigned, holding a valid commission issued by the National Board of Boiler and Pressure Vessel Inspectors The Hartford Steam Boiler of Inspection and Insurance and employed by Company Hartford, Connecticut have inspected the items described in this Owner's Activity Report, and state that, to the best of my knowledge and belief, the Owner has performed all activities represented by this report in accordance with the requirements of Section XI.

By signing this certificate neither the Inspector nor his employer makes any warranty, expressed or implied, concerning the repair/ replacement activities and evaluation described in this report. Furthermore, neither the Inspector nor his employer shall be liable in any manner for any personal injury or property damage or a loss of any kind arising from or connected with this inspection Commissions 15440 AI, I, N, R Inspectors Signature (National Board Number and Endorsement)

Date 22Jul21 E-1 of 2

Supplement to Report Number U2R3 TABLE 2 Abstract of Repairs/replacement Activities for Continued Service Item Description Date Repair/Replacement Code Class Description of Work Completed Plan Number Penetration Room 3 Replace cooler with new 7/23/2019 117348693 Cooler Flow control valve 3 Repair pinhole leak by replacing pipe 2/18/2020 120394576 welded piping Steam Generator #1 1 Tube plugging per Tech Spec requirements (Ref. CR 1677204) 1/26/21 120725231 (9 tubes)

Steam Generator #2 1 Tube plugging per Tech Spec requirements (Ref. CR 1677204) 1/26/21 120725238 (22 tubes)

Steam Generator #3 1 Tube plugging per Tech Spec requirements (Ref. CR 1677204) 1/26/21 120725245 (122 tubes)

Steam Generator #4 1 Tube plugging per Tech Spec requirements (Ref. CR 1677204) 1/26/21 120725252 (36 tubes)

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