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

VALLEY TENNESSEE 1\\14 AUTHORITY

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 Br owns 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 t hat 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.

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,

for M. Sivaraman 01/24/23 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 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

Un it No. ---~-- Comme rc ial seNil: da le August 1, 1974 Refueling Outage no. ____ U~1"--R'-'1 --'4 __ __ _

Current Insp ection lnteNal Third Ten Year Inspect ion Interval

Current Inspection Period =S=e=c=o~n=d~P_e=r~io=d~-------------,--,------- ------------( 1s t. 2M. 3rcJJ

2007 Edition, 2008 Addenda (ISi)

Edition and Addenda of Section XI app licable 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 app licab le to repa irs/rep lacem ent 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..::M iM b~ c ase N-532 an<l l.:ner rl!vision:s)

CERTIFICATE OF CONFORMANCE

I certify that (a) the slatements made in this repo rt are correct; (b) the ex am ina tions and tests mee t the In spectio n Plan as required b y the ASME Code,Section XI : and (c) the repair/replacemen t activities and eva luations supporting the comple tion of --=U '-'1-'-R'-'1--'4 __ _

confo rm to the requirements of Sec tion XI. (reru -e b ng o ui.aoe ri,urntier)

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

CERTIFICATE OF INSERVICE INSPECTION

I. the unde rsigned, holding a valid comm ission issued by the Nationa l Board of Bo iler and Pressure Vesse l Inspec to rs and employed by The Hartford Steam Boiler Inspection and Insuran ce Company of Hartford Co nnect icut have inspected the ilems described in this Owner's Activity Report and stale that. to the bes t of my knowledge and belief, the Owner has performed a ll activities represented by this report in accordance w ith the requirements of Section XI.

By signing this certi~cate neither the Inspe ctor nor his employer ma kes any war ranty, expressed or implied. concern ing the repa ir/replacement activities and eva luation described in this report. Fu rthermore, neiH1er the Inspector nor his employer sha ll be liable in any manner for any personal in jury or property dam a or a loss of any

• ar isi from or connected with this Inspec tion.

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, NO i U1R14-001 Evaluated Suppression Chamber Acceptable per IWE-3122.3.

Interior Surface Be low Waterline. Steel Corrosion Ind ication. Isolated spot corrosion Containment Vessel affecting substrate; 1-count, 0.25in. diameter per indication. Metal loss 79.3mi ls. The PSC-INT 1-B-2B ind ication 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 ind icat ion was acceptable and continue to meet applicable code requirements includ ing allowable stress limits.

Protective coating was reapplied to prevent further degradation. This location has been identified for Success ive 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, 0.25 in. diameter per ind ication. Metal loss 77.3mils. The PSC-INT 1-B-2B indication is greater than the criteria specified 0.075". A Civil Engineer ing Evaluation of the Bay 2, Plate 4 a rea was conducted. This evaluation concluded that the indication was acceptable and continue to meet applicab le code requirements including allowable stress limits.

Protective coating was reapp lied 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 Be low 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". Ind ication 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 Success ive 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) Inspectio n 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 inaccessib le 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.