ML19051A018

American Society of Mechanical EngineersSection XI, Inservice Inspection, System Pressure Test, Containment Inservice Inspection, and Repair and Replacement Programs - Owner'S Activity Report Cycle 12 Operation

ML19051A018
Person / Time
Site:	Browns Ferry
Issue date:	02/20/2019
From:	Hughes D Tennessee Valley Authority
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
Download: ML19051A018 (7)

Text

Tennessee Valley Authority, Post Office Box 2000, Decatur, Alabama 35609-2000 February 20, 2019 10 CFR 50.55 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 NRG Docket No. 50-259

Subject:

American Society of Mechanical EngineersSection XI, lnservice Inspection, System Pressure Test, Containment lnservice Inspection, and Repair and Replacement Programs - Owner's Activity Report for Browns Ferry Nuclear Plant, Unit 1, Cycle 12 Operation The Tennessee Valley Authority is submitting the Browns Ferry Nuclear Plant (BFN), American Society of Mechanical Engineers (ASME),Section XI, Owner's Activity Report for BFN, Unit 1, Cycle 12 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 lnservice 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 12 refueling outage, during the first inspection period of the Third 1O 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 12 refueling outage ended on November 22, 2018. Accordingly, this submittal is due by February 20, 2019.

U.S. Nuclear Regulatory Commission Page 2 February 20, 2019 There are no new regulatory commitments contained in this letter. Should you have any questions concerning this submittal, please contact M. W. Oliver, Acting Nuclear Site Licensing Manager, at (256) 729-7874.

R~~

D. L. Hughes Site Vice President

Enclosure:

American Society of Mechanical Engineers,Section XI , Third 10 Year Inspection Interval, lnservice Inspection, System Pressure Test, Containment Inspection, and Repair and Replacement Programs, Owner's Activity Report for Browns Ferry Nuclear Plant, Unit 1, Cycle 12 Operation cc (Enclosure): NRG Regional Administrator - Region II NRG Senior Resident Inspector - Browns Ferry Nuclear Plant NRG 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, lnservice Inspection, System Pressure Test, Containment lnservice Inspection, and Repair and Replacement Programs, Owner's Activity Report for Browns Ferry Nuclear Plant, Unit 1, Cycle 12 Operation See Enclosed

FORM OAR-1 OWNER'S ACTIVITY REPORT Report N u m b e r ~ B ~ F ~ N ~ U ~ 1 ~ R ~ 1 ~ 2 ~ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Plant Browns Ferry Nuclear Plant P.O. Box 2000 Decatur AL 35609 Unit No . - - ~ ~ - - Commercial service date August 1 1974 Refueling Outage no. ---~U~1~R~1~2~----

(if applicable)

Current Inspection Interval Third Ten Year Inspection Interval (1st, 2nd , 3rd, other)

Current Inspection Period ~F~ir=st~P~e~r~io~d~--------------,---,----,-,--------------------

(1st, 2nd , 3rd) 2007 Edition, 2008 Addenda (ISi)

Edition and Addenda of Section XI applicable to the inspection plans ~2=0~13~E~d~it~io~n__,,{~C~IS~IJ._)- - - - - - - - - - - - - - - - - ~

0-TPP-ENG-376, Revision 0000, 09/06/2018 0-Tl-364, Revision 0022, 09/19/2018 Date and Revision of inspection plan 0-Sl-4.6.G Revision 0003 09/14/2018 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-508-4 N-532-5 N-613-2 N-648-1 N-702 N-716-1 and N-751 (if applicable , including cases modified by Case N-532 and later revisions)

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 --~U~1~R~1~2~---

conform to the requirements of Section XI. (refueling outage number)

Signed  ; * /J4----

es;t> ~ r s Oesignee. Title 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 items described in this Owne r'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 pers~Aju roperty age or a loss of any kind arising from or connected with this Inspection .

Date _ _ 2--</,_,_(-=--+--

1/~ f '5____

FORM OAR-1 OWNER'S ACTIVITY REPORT TABLES Report Number BFNU1R12

- - - - - - - - - - - - - - - - -- - - - -- - - - - - - - -

PI ant Browns Ferry Unit No. 1 Commercial service date 08/01/1974 Refueling outage no. - 12- - -

Current inspection interval 3rd

---

Current inspection period -1st

-- - - - -

TABLE 1 ITEMS WITH FLAWS OR RELEVANT CONDITIONS THAT REQUIRE EVALUATIONS FOR CONTINUED SERVICE Examination Category and Item Number Item Description Evaluation Description Variable spring as-found (Acceptance by Evaluation)

F-A, Item F1 .20C setting found out of range . The condition was evaluated in accordance Acceptance range is 2078 with IWF-3122.3. Since the spring support was lbs, +/- 54 (2024 lbs to determined to still be able to perform its design 2132 lbs). As-found function , corrective measures were performed setting 2350 lbs. [NOi to restore the support to its orig ina l design U1R12-001) condition per IWF-3122.3 (b). WO 11 9973691 reset the load setting of the spring to the design range specifications. Therefore, no add itional or preservice exams are applicable. The spring support was then reinspected to ve rify th e settings.

E-A, Item E1 .11 Gouge in Drywell liner. EVALUATED ACCEPTABLE

[NOi U1 R12-002] (No Corrective Measures Requ ired .)

An indication cons isting of mechanical damage 1/32" in depth , 3/8" in width , and 7/16" in length was identified on the steel conta inment vessel (Drywell) liner. The remaining wall th ickness was 0.73" in the area of mechanica l damage.

The wall thickness was below the acceptance criteria without Civil Design Eng ineeri ng evaluation of 0.75". Civil Engineering determined that the remaining th ickness of 0.73" is greater than the allowed 10% reduction of wall thickness (0.675"), thus it is acceptable for continued operation . Per IWE-3122.3 (b) the area will be reexamined in accordance with IWE-2420.

FORM OAR-1 OWNER'S ACTIVITY REPORT TABLES Report Number BFNU1R12

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PI ant Browns Ferry Unit No. 1 Commercial service date 08/01/1974 Refueling outage no. - -

Current inspection interval 3rd

---

Current inspection period -1st

---

TABLE 2 ABSTRACT OF REPAIR/REPLACEMENT ACTIVITIES REQUIRED FOR CONTINUED SERVICE Code Description of Date Repair/Replacement Item Description Class Work I Completed Plan Number I

NONE NONE

FORM OAR-1 OWNER'S ACTIVITY REPORT TABLES Report Number BFNU1R12

---

PI ant Browns Ferry Unit No. 1 Commercial service date 08/01/1974 Refueling outage no. -12 ----

Current inspection interval 3rd

---

Current inspection period 1st

---

Summary of IWE Indications for U1R12 The summary table below is provided in accordance with the requirements of 10 CFR 50.55a(b )(2)(ix)(A) .

Examination Component Indication Acceptability/Corrective Action Inaccessible Additional Category and Identifier Description Area Samples Item Number (Location and Evaluation)

E-A, Item E1 .30 Moisture Seal Areas of EVALUATED ACCEPTABLE None None Barrier Separation . None of the areas penetrated the full MSB-1-1 [NOi U1R12- depth of the seal , seal adhesion was 003] good in all locations, and there was no seal failure . The affected portions of the seal identified for repair were excavated and drywell liner below the seal was VT-1 examined . No evidence of moisture intrusion or damage to the liner indicative of moisture intrusion was observed demonstrating no seal failure occurred . The MSB was then re-poured in these areas and re-examined .