ML18234A131

Lnservice Inspection Program Fourth Interval, First Period, Refueling Outage 22 Owner'S Activity Report

ML18234A131
Person / Time
Site:	Wolf Creek
Issue date:	08/14/2018
From:	Hafenstine C R Wolf Creek
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
RA 18-0089
Download: ML18234A131 (5)

Text

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• -, NUCLEAR OPERATING CORPORATION Cynthia R. Hafenstine Manager Nuclear and Regulatory Affairs U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555 August 14, 2018 RA 18-0089

Subject:

Docket No. 50-482: lnservice Inspection Program Fourth Interval, First Period, Refueling Outage 22 Owner's Activity Report To Whom It May Concern: Enclosed is the Wolf Creek Nuclear Operating Corporation (WCNOC) Owner's Activity Report (Form OAR-1, Report Number WCRE-30, 14-P1-RF22) for inservice inspections performed after Wolf Creek Generating Station's (WCGS) twenty-first refueling outage (RF21) that concluded on November 21, 2016, and up to, and including, WCGS' twenty-second refueling outage (RF22) that concluded on May 18, 2018. RF22 was the second refueling outage of the first period of the fourth interval of the WCNOC lnservice Inspection Program. The enclosed report is submitted pursuant to the requirements of paragraph IWA-6240 of the 2007 Edition through 2008 Addenda of Section XI of the American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code and ASME Code Case N-532-5. This letter contains no commitments.

If you have any questions concerning this matter, please contact me at (620) 364-4204.

CRH/ Enclosure cc: K. M. Kennedy (NRC), w/e B. K. Singal (NRC), w/e N. H. Taylor (NRC), w/e Senior Resident Inspector (NRC), w/e Sincerely, Cynthia R. Hafenstine P.O, Box 411 / Burlington, KS 66839 / Phone: (620) 364-8831 An Equal Opportunity Employer M/F/HCNET

-, ENCLOSURE Wolf Creek Nuclear Operating Corporation lnservice Inspection Program Owner's Activity Report (Form OAR-1, Report Number WCRE-30, 14-P1-RF22)

(3 pages)

., FORM OAR-1 OWNER'S ACTIVITY REPORT Report Plant __ W=o:.:.:lf..,C"'r"'ee=k..:G,,,e,..n..,e

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Current inspection interval 4th Current inspection period 1st (1st, 2nd, 3rd, 4th, other) (1st,2nd, 3rd) Edition and Addenda of Section XI applicable to the inspection plans 2007 Edition through 2008 Addenda . Date and revision of inspection plans _W.a.a.aC

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_ Edition and Addenda of Section XI applicable to repair/replacement activities.

if different than the inspection plans _s=a=m=e~--

Code Cases used: N-532-5 N-706-1 Of 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-22 conform to the requirements of Section XI. (refueling outage number) Signed ISi Engineer Date ___ 8=/=2/=2=0~1

.... 8 __ _ Owner or OWner's Designee, Title 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 Kansas and employed by The Hartford Steam Boiler Inspection and Insurance Company of Hartford.

CT 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.

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______ _ OAR-1 14-PJ-RF-22 Pagel o/3 I _.;\

-, TABLE 1 ITEMS WITH FLAWS OR RELEVANT CONDITIONS THAT REQUIRED EVALUATION FOR CONTINUED SERVICE Examination Category and Item Number D-B, D2.I0 D-B, D2.I0 Item Description EF-007-HBC-30 EF-003-HBC-30 OAR-I /4-P l-RF-22 Page2of3 Evaluation Description Localized pipe wall thickness below the uniform design minimum wall thickness was identified in one location.

An evaluation was performed for continued operation.

The evaluation determined that pressure boundary structural integrity is intact and that a follow up inspection is required by September 24, 2018. Localized pipe wall thickness below the uniform design minimum wall thickness was identified in three locations.

An evaluation was performed for continued operation.

The evaluation determined that pressure boundary structural integrity is intact and that a follow up inspection is required by November, 2018.

• -. I Code Class 1 1 1 1 3 TABLE2 ABSTRACT OF REPAIR/REPLACEMENT ACTIVITIES REQUIRED FOR CONTINUED SERVICE Item Description of Work Date Description Completed Note 1 EBB01A Install mechanical tube plugs in four U Tubes 04/20/2018 Steam Generator due to eddy current results with a flaw over 40% nominal tube wall thickness EBB01B Install mechanical tube plugs in five U Tubes 07/17/2018 Steam Generator due to eddy current results with a flaw over 40% nominal tube wall thickness EBB01C Install mechanical tube plugs in one U Tube 06/20/2018 Steam Generator due to eddy current results with a flaw over 40% nominal tube wall thickness EBB01D Install mechanical tube plugs in nine U Tubes 06/20/2018 Steam Generator due to eddy current results with a flaw over 40% nominal tube wall thickness SGN01B Remove leaking coil (one of twelve) from 06/20/2018 Containment service by installing blind flanges on header Cooler inlet and outlet. Note 1: The date completed is the date the Form NIS-2A was certified.

OAR-I 14-Pl-RF-22 Page3 o/3 Repair/Replacement Plan Number 2018-014 2017-083

• 2018-013 2018-015 2018-021