ML11263A148
| ML11263A148 | |
| Person / Time | |
|---|---|
| Site: | Wolf Creek  |
| Issue date: | 09/13/2011 |
| From: | Sen G Wolf Creek |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| RA 11-0184 | |
| Download: ML11263A148 (11) | |
Text
WucLLF CREEK NUCLEAR OPERATING CORPORATION September 13, 2011 Gautam Sen Manager Regulatory Affairs RA 11-0184 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555-0001
Subject:
Docket No. 50-482: Inservice Inspection Program Third Interval, Second Period, Refueling Outage 18 Owner's Activity Report Gentlemen:
Enclosed is the Wolf Creek Nuclear Operating Corporation (WCNOC) Owner's Activity Report (Form OAR-I, Report Number WCRE-16, 13-P2-RF18) for inservice inspections performed prior to, and during, Wolf Creek Generating Station's (WCGS) eighteenth refueling outage (RF18) that concluded on June 24, 2011. RF18 was the second outage of the second period of the third interval of the WCNOC Inservice Inspection Program.
The enclosed report is submitted pursuant to the requirements of paragraph IWA-6240 of the 1998 Edition through 2000 Addenda of Section XI of the American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code and ASME Code Case N-532-4.
There are no commitments contained within this letter.
If you have any questions concerning this matter, please contact me at (620) 364-4175 or Ms. Diane Hooper at (620) 364-4041.
Sincerely, Gautam Sen GS/rlt Enclosure cc: E. E. Collins (NRC), w/e J. R. Hall (NRC), w/e G. B. Miller (NRC), w/e Senior Resident Inspector (NRC), w/e jiY~~-r7 P.O. Box 411 / Burlington, KS 66839 / Phone: (620) 364-8831 An Equal Opportunity Employer M/F/HC/VET
Enclosure to RA 11-0184 Wolf Creek Nuclear Operating Corporation (WCNOC)
Owner's Activity Report (Form OAR-I, Report Number WCRE-16, 13-P2-RF18)
(9 pages)
FORM OAR-1 OWNER'S ACTIVITY REPORT Report Number WCRE-16, 13-P2-RF18 Plant Wolf Creek Generating Station. 1550 Oxen Lane Northeast, Burlington, Kansas 66839 Unit No. 1 Commercial service date 9-3-1985 Refueling outage no. RF-18 (if appl*bcle)
Current inspection interval 3rd (1st, 2nd. 3rd. 4th, other)
Current inspection period 2st (115t.2nd, 3rd)
Edition and Addenda of Section X4 applicable to the inspection plans 1998 Edition throuoh 2000 Addenda Date and revision of inspection plans WCRE-16 Rev. 7. dated 3-17-2011 Edition and Addenda of Section XI applicable to repair/replacement activities, ifdifferent than the inspection plans same Code Cases used: See Attachment 1 (if applcable)
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-18 (refueting outage number) conform to the requirements of Section XI.
Signed t&*. .Vq j4 4 /'66R Date r? / 3j / z0 //
Owdror Owner's Designee, Title S - I 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 Co. of Connecticut 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.
... Commissions NB 13573 A.N.I KS 657 inspetorss IlQn National Board, State. Province. and Endorsements Date-3(44air 2Z3ij OAR-I 13-P2-RF-18 Page I of 9
TABLE I ITEMS WITH FLAWS OR RELEVANT CONDITIONS THAT REQUIRED EVALUATION FOR CONTINUED SERVICE Examination Item Description Evaluation Description Category and Item Number D-B, D2.10 Essential Service Water (ESW) A through wall leak was piping line EF03 1HBC-30 identified in a piping to flange weld. An evaluation was performed in accordance with Code Case N-513-2. The evaluation determined that structural integrity was intact and that the piping could remain in operation in the current condition until the next available opportunity to repair, or the next refueling outage. Repairs were performed in RF18 on this piping per R/R plan 2011-009 listed in Table 2.
D-B, D2.10 ESW piping Note I Note 1: The ESW system has experienced degradation (internal pitting). An on-line degradation assessment was performed to check for wall thinning in this system using guided wave and phased array technology. An analysis was performed on the system to determine the required minimum wall thickness for system operation. Reference Calculation EF-M-055, Essential Service Water Piping Flaw Handbook. Repairs were made on locations that did not have the required thickness. Repairs were also made on locations that were projected (based on corrosion rates) to be below the required thickness prior to the next scheduled inspection. These repairs are all listed in Table 2.
OAR-]
13-P2-RF-18 Page2 of 9
TABLE 2 ABSTRACT OF REPAIR/REPLACEMENT ACTIVITIES REQUIRED FOR CONTINUED SERVICE Code Item Description of Work Date Repair/Replacement Class Completed Plan Number Description Note I 3 ESW Piping Line Perform weld overlay on spool EF01- 05/27/2010 2009-075 EF138HBC-30 S012/311 due to inside diameter pitting on EF01-S012/311 line EF138HBC-30.
3 ESW "B"Train Installed numerous encapsulations over 05/31/2011 2010-082 Above-Ground degraded areas due to inside diameter pitting. 05/31/2011 2010-093 Piping (Pre- This work was performed from 09/14/2010 05/31/2011 2010-096 Refuel 18) thru 01/13/2011 during an on-line degradation 05/31/2011 2010-097 EF129HBC-24 assessment. 05/31/2011 2010-098 EF031 HBC-30 05/31/2011 05/31/2011 2010-099 2010-100 EF138HBC-30 NOTE: During RF18, a section of spool EF139HBC-30 EF01-S005/311 on the B Train ESW Supply 05/31/2011 2010-101 Line EF031HBC-30 was replaced in 05/31/2011 2010-102 05/31/2011 2010-103 accordance with Repair/Replacement Plan 2011-009. When the referenced section of 05/31/2011 2010-105 piping and spool were replaced, the 05/31/2011 2010-106 05/31/2011 2010-107 encapsulations previously installed in 05/31/2011 2010-108 accordance with Repair/Replacement Plans 2010-093 and 2010-115 were removed from 05/31/2011 2010-10 the System. 05/31/2011 2010-111 05/31/2011 2010-113 05/31/2011 2010-114 05/31/2011 2010-115 05/31/2011 2010-115 3 ESW "A"Train Installed one encapsulation over a thru-wall 10/21/2010 2010-117 Below-Ground leak and several other encapsulations were 03/02/2011 2010-122 Piping (Forced installed over degraded areas due to inside 11/23/2010 2010-123 Outage) diameter pitting. This work was performed 08/16/2011 2010-124 EF003HBC-30, from 10/07/2010 thru 10/12/2010 during a 08/16/2011 2010-125 EF083HBC-30 forced outage.
OAR-I 13-P2-RF-18 Page 3 of 9
Code Item Description of Work Date Repair/Replacement Class Completed Plan Number sDescription Note 1 3 ESW "A"Train Installed numerous encapsulations over 05/31/2011 2010-128 Above-Ground degraded areas due to inside diameter pitting. 05/31/2011 2010-129 Piping (Pre- This work was performed from 10/27/2010 05/31/2011 2010-130 Refuel 18) thru 01/06/2011 during an on-line degradation 05/31/2011 2010-131 EF010HBC-30 assessment. 05/31/2011 2010-132 EF020HBC-30 EF082HBC-30 NOTE: During RF18, a section of pipe spool 05/31/2011 05/26/2011 2010-133 2010-134 EF01-S023/311 on piping line EF-020-HBC- 05/31/2011 2010-135 30" was replaced in accordance with 05/31/2011 2010-136 Repair/Replacement Plan 2011-007. When 05/31/2011 2010-137 the referenced section of piping and spool 05/31/2011 2010-138 were replaced, the encapsulations previously 05/31/2011 2010-139 installed in accordance with 05/31/2011 2010-140 Repair/Replacement Plans 2010-128, 2010- 05/31/2011 2010-141 129, 2010-131, 2010-132, 2010-135, 2010- 05/31/2011 2010-142 136, 2010-140, 2010-141, 2010-144, 2010- 05/31/2011 2010-143 150, 2010-151, 2010-153, and 2010-159 were 05/26/2011 2010-144 removed from the System. 05/31/2011 2010-145 NOTE: During RF18, all of pipe spool EF01- 05/31/2011 2010-146 S033/311 on piping line EF-082-HBC-30 was 05/31/2011 2010-147 replaced in accordance with 05/31/2011 2010-148 Repair/Replacement Plan 2011-008. When 05/31/2011 2010-149 the referenced piping and spool were 05/31/2011 2010-150 replaced, the encapsulations previously 05/31/2011 2010-151 installed in accordance with 05/26/2011 2010-152 Repair/Replacement Plans 2010-139, 2010- 05/31/2011 2010-153 142, and 2010-143 were removed from the 05/26/2011 2010-159 System.
3 ESW "A" Train Installed several encapsulations over 05/26/2011 2010-154 Below-Ground degraded areas due to inside diameter pitting. 05/26/2011 2010-155 Piping (Pre- This work was performed from 11/05/2010 05/26/2011 2010-156 Refuel 18) thru 12/29/2010 during an on-line degradation 05/26/2011 2010-157 EF003HBC-30 assessment. 05/26/2011 2010-158 EF083HBC-30 05/26/2011 2010-162 OAR-I 13-P2-RF-18 Page 4 of 9
ption of Work Date Repair/Replacement Completed Plan Number Note 1 4 I.
3 ESW "B"Train Installed numerous encapsulations over 05/26/2011 2010-160 Below-Ground degraded areas due to inside diameter pitting. 05/31/2011 2010-161 Piping (Pre- This work was performed from 11/10/2010 05/26/2011 2010-163 Refuel 18) thru 02/18/2011 during an on-line degradation 05/26/2011 2010-164 EF007HBC-30 assessment. 05/31/2011 2010-165 EF140HBC-30 05/26/2011 2010-166 EF181HBC-42 05/26/2011 2010-167 EF224HBC-30 05/26/2011 2010-168 05/26/2011 2010-169 05/26/2011 2010-170 05/26/2011 2010-171 05/31/2011 2010-172 05/31/2011 2010-173 05/31/2011 2010-174 05/31/2011 2010-175 05/31/2011 2010-176 05/31/2011 2010-177 05/31/2011 2010-178 05/31/2011 2010-179 05/31/2011 2010-180 05/31/2011 2010-181 05/31/2011 2010-182 05/31/2011 2010-183 05/31/2011 2010-184 05/31/2011 2010-185 05/31/2011 2010-186 05/31/2011 2010-187 05/31/2011 2010-188 05/31/2011 2010-189 05/31/2011 2010-190 05/31/2011 2010-191 3 ESW Piping Line Perform base metal repairs on the upstream 07/26/2011 2011-007 EF020HBC-30 flange of EFFE0053 and replace the flange EFOI-S023/311 downstream of EFV0107 on spool EF01-S023/311 due to inside diameter pitting on these items on line EF020HBC-30. Also, replace approximately 25 feet of pipe between EFV0107 and EFFE0053 on spool EF01-S023/311 on line EF020HBC-30.
NOTE: When the referenced section of piping and spool were replaced, the encapsulations previously installed in accordance with Repair/Replacement Plans 2010-128, 2010-129, 2010-131, 2010-132, 2010-135, 2010-136, 2010-140, 2010-141, 2010-144, 2010-150, 2010-151, 2010-153, and 2010-159 were removed from the System.
OAR-I 13-P2-RF-18 Page 5 of 9
Code Item Description of Work Date Repair/Replacement Class Completed Plan Number Description Note 1 3 ESW Piping Line Replace the flange upstream of EFHV0039 on 07/25/2011 2011-008 EF082HBC-30, spool EF01-S033/311 due to inside diameter EF01S033/311 pitting on line EF082HBC-30. Also, replace the remainder of spool EF01-S033/311 on line EF082HBC-30.
NOTE: When the referenced section of piping and spool were replaced, the encapsulations previously installed in accordance with Repair/Replacement Plans 2010-139, 2010-142, and 2010-143 were removed from the System.
3 ESW Piping Line Replace section of spool EF01-S005/311 on EF031HBC-30 line EF031HBC-30. 07/25/2011 2011-009 EF01-S005/311~ NOTE: When the referenced section of piping and spool were replaced, the encapsulations previously installed in accordance with Repair/Replacement Plans 2010-093 and 2010-115 were removed from the System.
Replacement of this section of the referenced spool included replacement of the downstream flange for EFFE0054 (ESW Train B Supply Flow Element), the associated leaking attachment weld and piping at this location. Engineering had previously evaluated this through wall leak in accordance with Code Case N-513-2. See the table 1 entry for ESW piping line EF031HBC-30.
3 ESW Piping Line Rework undersize socket welds on two 08/08/2011 2011-021 EF082HBC-30 encapsulations previously installed on line EF01-S034/311 EF082HBC-30.
3 ESW Piping Line Replace spool KC0111-S012 and perform a 05/26/2011 2011-025 EF227HBC-30 base metal repair on Spool K21 1-S143 due to K211-S143 inside diameter pitting on line EF227HBC-30.
KC0111-S012 3 ESW Piping Line Perform base metal repairs due to inside 05/23/2011 2011-026 EF081 HBC-30 diameter pitting on the downstream side of the EF01-S028/311 tee on spool EF01-S028/311 on line EF081HBC-30.
3 ESW Piping Line Replace spool EF03-S008/142, replace a 07/28/2011 2011-031 EG205HBC-24 section of spool EF03-S009/142 and install 3 EF03-S008/142 encapsulations on the remaining section of EF03-S009/142 spool EF03-S009/142 due to inside diameter I pitting on line EG205HBC-24.
OAR-I 13-P2-RF-18 Page 6 of 9
Code Item Description of Work Date Repair/Replacement Class Completed Plan Number sDescription Note 1 3 Pacific Scientific Replace existing snubber due to snubber 05/19/2011 2011-035 Pipe Support being determined unsatisfactory for continued EF03RO16/142 use because of high drag 3 Component Perform base metal repairs on the channel 05/19/2011 2011-037 Cooling Water cover.
Heat Exchanger EEG01A 2 Reactor Water Perform weld repairs on areas where through 06/29/2011 2011-038 Storage Tank wall and other weld defects were identified.
TBNO1 3 ESW "A" Train Installed one encapsulation over a degraded 07/13/2011 2011-040 Above-Ground area due to inside diameter pitting. This work Piping (Refuel was performed from 04/10/2011 thru
- 18) 04/15/2011.
EF080HBC-24 3 ESW "B" Train Installed several encapsulations over 07/20/2011 2011-048 Above-Ground degraded areas due to inside diameter pitting. 07/18/2011 2011-063 Piping (Refuel This work was performed from 04/21/2011 07/18/2011 2011-066
- 18) thru 08/09/2011. 07/13/2011 2011-067 GN050HBC-10 07/13/2011 2011-069 GN046HBC-14 08/24/2011 2011-075 EF137HBC-24 EG210HBC-24 EF138HBC-30 EF129HBC-24 3 ESW Piping Line Replace spool EF05-S011/141 and a section 08/01/2011 2011-049 EG212HBC-24 of spool EFOI-S012/141 due to .inside EF05-SO 11/141 diameter pitting on line EG212HBC-24".
EF05-S012/141 3 ESW Piping Line Perform base metal repairs on spool KC0111- 05/31/2011 2011-050 EF228HBC-30 S019 due to inside diameter pitting on line KC0111-S019 EF228HBC-30.
3 ESW Piping Line Replace spool K211-S189, replace a section 06/02/2011 2011-051 EF228HBC-30 of spool K21 1-$153, and perform base metal K211-S153 repairs on the remaining section of spool K211-$189 K211-S1 53 due to inside diameter pitting on line EF228HBC-30.
OAR-i 13-P2-RF-18 Page 7 of 9
Code Item Description of Work Date Repair/Replacement Class Completed Plan Number sDescription Note 1 3 ESW "A" Train Installed two encapsulations over degraded 07/13/2011 2011-055 Below-Ground areas due to inside diameter pitting. This work and ESW was performed from 05/09/2011 thru Pumphouse 05/21/2011 Piping (Refuel 18)
EF003HBC-30 3 ESW Piping Line Perform base metal repairs on spool KCO I11- 05/23/2011 2011-057 EF228HBC-30 S019 due to inside diameter pitting on line KC01 11-S019 EF228HBC-30 at locations beyond where the line penetrates through the East Concrete Wall.
3 ESW "B"Train Installed several encapsulations over 07/13/2011 2011-064 Below-Ground degraded areas due to inside diameter pitting.
Piping (Refuel This work was performed from 04/27/2011
- 18) thru 05/04/2011.
EF007HBC-30 2 Crosby Safety Replace existing relief valve due to the 05/31/2011 2011-068 Relief Valve in possible deformation of the spring coil (the Main Steam removed valve has not been tested yet).
System ABV0078 2 Excess Letdown Repair damaged tube bundle and plug 2 08/03/2011 2011-071 Heat Exchanger tubes.
EBG02 Note 1: The date completed is the date that the NIS-2A form was certified.
OAR-]
13-P2-RF-18 Page 8 of 9
ATTACHMENT I Code Cases used:
N-460 N-513-2 N-532-4 N-533-1 N-552 N-566-2 N-616 N-623 N-624 N-639 N-652 N-658 N-661 N-685 N-686 N-695 N-700 N-706 OAR-I 13-P2-RF-18 Page 9 of 9