ML23025A075

American Society of Mechanical Engineers,Section XI, Third 10 Year Inspection Interval, Inservice Inspection, System Pressure Test, Containment Inspection, and Repair and Replacement Programs, Owner’S Activity Report Cycle .

ML23025A075
Person / Time
Site:	Browns Ferry
Issue date:	01/25/2023
From:	Sivaraman M Tennessee Valley Authority
To:	Office of Nuclear Reactor Regulation, Document Control Desk
References
Download: ML23025A075 (1)

Text

Post Office Box 2000, Decatur, Alabama 35609-2000 January 25, 2023 10 CFR 50.55a ATTN: Document Control Desk U.S. Nuclear Regulatory Commission Washington, D.C. 20555-0001 Browns Ferry Nuclear Plant, Unit 1 Renewed Facility Operating License No. DPR-33 NRC Docket No. 50-259

Subject:

American Society of Mechanical Engineers,Section XI, Third 10 Year Inspection Interval, Inservice Inspection, System Pressure Test, Containment Inspection, and Repair and Replacement Programs, Owners Activity Report for Browns Ferry Nuclear Plant, Unit 1, Cycle 14 Operation The Tennessee Valley Authority is submitting the Browns Ferry Nuclear Plant (BFN), American Society of Mechanical Engineers (ASME),Section XI, Owners Activity Report for BFN, Unit 1, Cycle 14 Operation. The report is contained in the enclosure to this letter and is in accordance with the requirements of ASME Code Case N-532-5, Repair/Replacement Documentation Requirements and Inservice Summary Report Preparation and Submission,Section XI, Division 1.

The report is an overview of the inservice examination results that were performed on components within the ASME Section XI boundary, up to and including the BFN, Unit 1, Cycle 14 refueling outage, during the second inspection period of the Third 10 Year Inspection Interval. The applicable provisions of the ASME Code Case N-532-5 require that this report be submitted within 90 calendar days of the completion of each refueling outage. The BFN, Unit 1, Cycle 14 refueling outage ended on October 27, 2022. Accordingly, this submittal is due by January 25, 2023.

1\\14 TENNESSEE VALLEY AUTHORITY

U.S. Nuclear Regulatory Commission Page 2 January 25, 2023 There are no new regulatory commitments contained in this letter. Should you have any questions concerning this submittal, please contact C. L. Vaughn, Site Licensing Manager, at (256) 729-2636.

Respectfully, Manu Sivaraman Site Vice President

Enclosure:

American Society of Mechanical Engineers,Section XI, Third 10 Year Inspection Interval, Inservice Inspection, System Pressure Test, Containment Inspection, and Repair and Replacement Programs, Owners Activity Report for Browns Ferry Nuclear Plant, Unit 1, Cycle 14 Operation cc (Enclosure): NRC Regional Administrator - Region II NRC Senior Resident Inspector - Browns Ferry Nuclear Plant NRC Project Manager - Browns Ferry Nuclear Plant for M. Sivaraman 01/24/23

Enclosure Tennessee Valley Authority Browns Ferry Nuclear Plant Unit 1 American Society of Mechanical Engineers,Section XI, Third 10 Year Inspection Interval, Inservice Inspection, System Pressure Test, Containment Inservice Inspection, and Repair and Replacement Programs, Owners Activity Report for Browns Ferry Nuclear Plant, Unit 1, Cycle 14 Operation See Enclosed

FORM OAR-1 OWNER'S ACTIVITY REPORT Report Number ~B~F~N~U~ 1--'R~1~4 ____________________________________ _

Plant Browns Ferry Nuclear Plant, P.O. Box 2000. Decatur, AL 35609 Unit No.---~--

Commercial seNil: dale August 1, 1974 Refueling Outage no. ____

U~1"--R'-'1--'4 ____ _

Current Inspection lnteNal Third Ten Year Inspection Interval Current Inspection Period =S=e=c=o~n=d~P_e=r~io=d~-------------,--,--------------------

(1st. 2M. 3rcJJ 2007 Edition, 2008 Addenda (ISi)

Edition and Addenda of Section XI applicable to the inspection plans =2=0~1=3~E=d=i=lio~n~{C~IS=I~)----------------~

0-TPP-ENG-376. Revision 04. 11/18/2022 0-Tl-364, Revision 24, 06/1712022 Date and Revision of inspection plan O-TPP-ENG-467 Revision 00, 09/28/2022 Edition and Addenda of Section XI applicable to repairs/replacement activities, if different than the inspection plans _N~/A __ _

Code Cases used for inspection and evaluation: N-532-5, N-613-2, N-648-1, N-702, N-716-1. N-751. N-854, and N-864 (ir ap::ilicab!e, 1nch.JC11n,g casl!s m*o..::MiM b~ case N-532 an<l l.:ner rl!vision:s)

CERTIFICATE OF CONFORMANCE I certify that (a) the slatements 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 --=U'-'1-'-R'-'1--'4 __ _

conform to the requirements of Section XI.

(reru-ebng oui.aoe ri,urntier)

Date __

/_-__,_/--'""8:_---'--:J."--'J..,_ ___ _

CERTIFICATE OF INSERVICE INSPECTION I. the undersigned, holding a valid commission issued by the National Board of Boiler and Pressure Vessel Inspectors and employed by The Hartford Steam Boiler Inspection and Insurance Company of Hartford Connecticut have inspected the ilems described in this Owner's Activity Report and stale 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 certi~cate neither the Inspector nor his employer makes any warranty, expressed or implied. concerning the repair/replacement activities and evaluation described in this report. Furthermore, neiH1er the Inspector nor his employer shall be liable in any manner for any personal injury or property dam a or a loss of any

• arisi from or connected with this Inspection.

FORM OAR-1 OWNER'S ACTIVITY REPORT TABLES Report Number BFNU1 R14 PI ant Browns Ferry Unit No.

1 Commercial service date 08/01/1974 Refueling outage no. 14 Current inspection interval 3rd Current inspection period 2nd TABLE 1 ITEMS WITH FLAWS OR RELEVANT CONDITIONS THAT REQUIRE EVALUATIONS FOR CONTINUED SERVICE Examination Category and Item Number Item Description Evaluation Description E-A/ El.12 Torus Shell Interior Plate, CR 1808324, NOi U1R14-001 Evaluated Suppression Chamber Acceptable per IWE-3122.3.

Interior Surface Below Waterline. Steel Corrosion Indication. Isolated spot corrosion Containment Vessel affecting substrate; 1-count, 0.25in. diameter per indication. Metal loss 79.3mils. The PSC-INT 1-B-2B indication is greater than the criteria specified 0.075". A Civil Engineering Evaluation of the Bay 2, Plate 1 area was conducted. This evaluation concluded that the indication was acceptable and continue to meet applicable code requirements including allowable stress limits.

Protective coating was reapplied to prevent further degradation. This location has been identified for Successive examinations in accordance with IWE-2420(b).

E-A/ El.12 Torus Shell Interior Plate, CR 1808603, NOi U1R14-002 Evaluated Suppression Chamber Acceptable per IWE-3122.3.

Interior Surface Below Waterline. Steel Corrosion Indication. Isolated spot corrosion Containment Vessel affecting substrate; 1-count, 0.25in. diameter per indication. Metal loss 77.3mils. The PSC-INT 1-B-2B indication is greater than the criteria specified 0.075". A Civil Engineering Evaluation of the Bay 2, Plate 4 area was conducted. This evaluation concluded that the indication was acceptable and continue to meet applicable code requirements including allowable stress limits.

Protective coating was reapplied to prevent further degradation. This location has been identified for Successive examinations in accordance with IWE-2420(b).

E-A/ El.12 Torus Shell Interior Plate, CR 1808919, NOi U1R14-003 Evaluated Suppression Chamber Acceptable per IWE-3122.3.

Interior Surface Below

FORM OAR-1 OWNER'S ACTIVITY REPORT TABLES Report Number BFNU1R14 PI ant Browns Ferry Unit No.

1 Commercial service date 08/01/1974 Refueling outage no.

14 Current inspection interval 3rd Current inspection period 2nd Examination Category and Item Number Item Description Evaluation Description Waterline. Steel Corrosion Indication. Isolated spot corrosion Containment Vessel affecting substrate; 1-count, 0.Sin. diameter per indication. Metal loss 94.3mils. The PSC-INT 1-8-108 indication is greater than the criteria specified 0.075". Indication located on the fillet weld of Bay 10, Plate 3 stiffener plate welded to shell. A Civil Engineering Evaluation of the area was conducted. This evaluation concluded that the indication was acceptable and continue to meet applicable code requirements including allowable stress limits. Protective coating was reapplied to prevent further degradation. This location has been identified for Successive examinations in accordance with IWE-2420(b).

E-A/ El.12 Torus Shell Interior Plate, CR 1808920, NOi U1R14-004 Evaluated Suppression Chamber Acceptable per IWE-3122.3.

Interior Surface Below Waterline. Steel Corrosion Indication. Isolated spot corrosion Containment Vessel affecting substrate; 1-count, 0.375in. diameter per indication. Metal loss 79mils. The PSC-INT 1-B-14B indication is greater than the criteria specified 0.075". Indication located on the fillet weld of Bay 14, Plate 6 stiffener plate welded to shell. A Civil Engineering Evaluation of the area was conducted. This evaluation concluded that the indication was acceptable and continue to meet applicable code requirements including allowable stress limits. Protective coating was reapplied to prevent further degradation. This location has been identified for Successive examinations in accordance with IWE-2420(b).

E-A/ El.12 Torus Shell Interior Plate, CR 1811846, NOi UlR14-006 Evaluated Suppression Chamber Acceptable per IWE-3122.3.

Interior Surface Below Waterline. Steel Corrosion Indication. Isolated mechanical Containment Vessel damage affecting substrate; 1-count, 0.125in.

diameter per indication. Metal loss 134.3mils.

PSC-INT 1-8-13B The indication is greater than the criteria specified 0.075". A Civil Engineering

FORM OAR-1 OWNER'S ACTIVITY REPORT TABLES Report Number BFNU1 R14 PI ant Browns Ferry Unit No.

1 Commercial service date 08/01/1974 Refueling outage no.

14 Current inspection interval 3rd Current inspection period 2nd Examination Category and Item Number Item Description Evaluation Description Bay 13, Plate 3 Evaluation of the area was conducted. This evaluation concluded that the indication was acceptable and continue to meet applicable code requirements including allowable stress limits. Protective coating was reapplied to prevent further degradation. This location has been identified for Successive examinations in accordance with IWE-2420(b).

FORM OAR-1 OWNER'S ACTIVITY REPORT TABLES Report Number BFNU1 R14 PI ant Browns Ferry Unit No.

1 Commercial service date 08/01/1974 Refueling outage no.

14 Current inspection interval 3rd Current inspection period 2nd TABLE 2 ABSTRACT OF REPAIR/REPLACEMENT ACTIVITIES REQUIRED FOR CONTINUED SERVICE Code Item Description Description of Work Date Repair/Replacement Class Completed Plan Number None None None None None

FORM OAR-1 OWNER'S ACTIVITY REPORT TABLES Report Number BFNU1 R14 PI ant Browns Ferry Unit No.

1 Commercial service date 08/01/1974 Refueling outage no.

14 Current inspection interval 3rd Current inspection period 2nd REPORTING REQUIRED BY 10 CFR S0.55a(b)(2)(ix)(A)

ASME Section XI, Subsection IWE Steel Containment Vessel Inspection program 10 CFR 5O.55a(b)(2)(ix)(A) requires reporting of the degradation assessment for inaccessible areas when conditions are identified in accessible areas during the performance of the ASME Section XI, Subsection IWE Steel Containment Vessel (SCV) Inspection Program that could indicate the presence of or result in degradation to such inaccessible areas.

Examination Component Indication Acceptability/ Corrective Action Category and Identifier Description Item Number E-A, Item MSB-1-1 Mechanical Isolated locations of the Moisture Seal Barrier (MSB) of the SCV was El.3O (Moisture Damage.

identified to have disbanding conditions requiring excavations and

[NOi U1R14-Seal Areas of examination of inaccessible areas beneath the barrier. The inaccessible ROOS]

Barrier)

Separation.

areas of the SCV beneath the MSB were determined to be acceptable by VT-1 visual examination. The examination identified no evidence of complete separation from the drywell liner that would allow moisture to enter the area below the seal. Conditions were corrected by cleaning and replacing damaged areas of the MSB with no Repair/ Replacement Activity required.