NRC-20-0064, Inservice Inspection Summary Report

Inservice Inspection Summary Report

ML20308A900
Person / Time
Site:	Fermi
Issue date:	11/03/2020
From:	Offerle M DTE Electric Company
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
NRC-20-0064
Download: ML20308A900 (5)

Text

DTE Electric Company 6400 N. Dixie Highway Newport, MI 48166 DTE November 3, 2020 10 CFR 50.55a NRC-20-0064 U.S. Nuclear Regulatory Commission Attention: Document Control Desk Washington, DC 20555-0001 Fermi 2 Power Plant NRC Docket No. 50-341 NRC License No. NPF-43

Subject:

Inservice Inspection Summary Repmt Enclosed is the Summary Repmt of the Inservice Inspection (ISI) activities performed at DTE Electric Company's (DTE) Fermi 2 Nuclear Power Plant during the 20th Refueling Outage in Spring 2020. This report represents a partial summary of the ISI activities for the fourth Ten year Inspection Interval that began on May 2, 2019 and is scheduled for completion on December 31, 2029.

This repmt is being submitted in accordance with Code Case N532-5 on the Form OAR-I, Owner's Activity Repmt.

No new commitments are being made in this submittal.

Should you have any questions or require additional information, please contact me at (734) 586-5076.

Sincerely,

/Jl, Margaret M. Offerle Manager - Nuclear Licensing

USNRC NRC-20-0064 Page 2

Enclosure:

Form OAR-1 Owners Activity Report cc: NRC Project Manager NRC Resident Office Regional Administrator, Region III M. Wilson - Authorized Nuclear Inservice Inspector (ANII)

M. Moore - Chief Inspector Michigan Department of Labor & Economic Growth Bureau of Construction Codes and Fire Safety - Boiler Division

Enclosure to NRC-20-0064 Fermi 2 NRC Docket No. 50-341 Operating License No. NPF-43 Form OAR-1 Owners Activity Report

S - C C <

Form OA.R~1 bwne~*s Acti\fity <Repcfrt **

Report Number RF-20 OAR-1 Plant Fermi NPP 6400 North Dixie Hwy, Newport, Ml 48166 (Name and Address of Plant)

Unit No. 2 Commercial Service Date _1_/2_3_/1_9_8_8_ _ _ _ Refueling Outage No. _2_0_ _ _ _ _ _ _ __

(if applicable)

Current Inspection Interval 4th

{1st, 2nd, 3rd, 4th, other)

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

Edition and Addenda of Section XI applicable to the inspection plans 2013 Edition Date and Revision of inspection plans 5/2/2019, Revis ion 11 Edition and Addenda of Section XI applicable to repair/replacement activities, if different than the inspection plans Code Case used: N-532-5, N-716-1 (If applicable)

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 RF-20 conform to the requirements of Section XI.

(Refueling Outage Number)

Signed Marc A. Brooks/ Date CERTIFICATE OF INSERVICE INSPECTION I, the undersigned, holding a valid commission issued by the National Board of Boiler and Pressure Vessel Inspectors and the State or Province of Michigan and employed by The Hartford Steam Boiler Inspection and Insurance of One State St., Hartford CT have inspected the items described in this Owner's ActivityReport, 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 loss of any kind arising from or connected with this inspection.

MarkWilson/ /24~- Commissions NB9486 BIN NS R Ml300610 nspector's Signature National Board, State, Province, and Endorsements Date 9/28/2020 ScheduleWorks V. 8.1 Page 1 - 1

RF20 Owners Activity Report Attachment TABLE 1 ITEMS WITH FLAWS OR RELEVANT CONDITIONS THAT REQUIRED EVALUATION FOR CONTINUED SERVICE Examination Category and Item Number Item Description Evaluation Description E-A, E1.20 BWR Containment Vent System Finite Element Analysis and Fatigue (Torus Vent Header) Evaluations along with use of design requirements from a later edition (2010) of ASME Section Ill increased allowable stress values as permitted in IWAA226 to demonstrate membrane stresses were bounded for local thinned areas for long term operation.

TABLE 2 ABSTRACT OF REPAIR/REPLACEMENT ACTIVITIES REQUIRED FOR CONTINUED SERVICE Code Item Description  ! Date Repair/Replacement Class Description Of Work Completed Plan Number Weld repair to restore Wetted surfaces of thickness at local thinned submerged areas of the BWR areas (isolated corrosion 2/MC 7/4/2020 19-022 containment surfaces pits) not meeting the

{Torus Shell) procedure required minimum wall thickness.

Weld repair to restore BWR Containment Vent thickness at local thinned 2/MC 7/29/2020 19-022 System {Torus Vent Header) areas not bounded by finite element analysis Replaced pipe sections with external corrosion ASME Class 3 External due to wet environment 3 Corrosion at RHR Complex 6/11/2020 20-027 associated with Wall Penetration piping.

Mechanical Draft Cooling Tower wall penetrations 1