ML13091A388
| ML13091A388 | |
| Person / Time | |
|---|---|
| Site: | Watts Bar  |
| Issue date: | 03/28/2013 |
| From: | Chalifoux R ATC Nuclear |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| 48862 | |
| Download: ML13091A388 (4) | |
Text
0312812013 U.S. Nuclear Regulatory Commission OperationsCenter Event Report Paze I Part 21 (PAR) Event# 48862 Rep Org: ATC NUCLEAR Notification Date / Time: 03/28/2013 15:29 (EDT)
Supplier: ATC NUCLEAR Event Date / Time: 01/21/2013 (EDT)
Last Modification: 03/28/2013 Region: 1 Docket #:
City: OAK RIDGE Agreement State: Yes County: License #:
State: TN NRC Notified by: R. A. CHALIFOUX Notifications: PAUL KROHN R1DO HQ Ops Officer: STEVE SANDIN DEBORAH SEYMOUR R2DO Emergency Class: NON EMERGENCY JULIO LARA R3DO 10 CFR Section: GREG PICK R4DO 21.21 (a)(2) INTERIM EVAL OF DEVIATION NRR PART 21 GROUP EMAIL INTERIM PART 21 REPORT INVOLVING REVIEW OF SEISMIC TESTING METHODOLOGY The following information was received via fax:
"ATC Nuclear in Oak Ridge, TN is making an initial notification of a Potential Part 21 Defect in accordance with 10 CFR 21.21 (a)(2).
"A recent review performed January 21, 2013 of seismic Test Response Spectra (TRS) for seismic qualification activities identified that Required Response Spectra (RRS) may not have been completely enveloped for portions of the required frequency range during test performance of the Operational Basis Events (OBE's) and the Safe Shutdown Earthquake(s) (SSEs) for some customers. Specifically, some TRS results may have been below the provided RRS in the 10-25 Hz range in certain circumstances and thus not fully meeting the RRS and required acceptance criteria of IEEE 344 1975/1987/2004. The condition is the result of the instrumentation methodology and inherent tri-axial table characteristics where vibrational energy is not fully transmitted to the unit under test in all test conditions. The safety significance is that the Basic Component may not perform its intended safety function during or following a seismic event exceeding the as-tested vibration frequencies. ATC has demonstrated through actual testing to date that this probability is very low. Many customers provide RRS that include conservatism; however, this also has not been credited in the ATC Nuclear evaluation methodology discussed below. The affected customers, purchase orders, and relevant information have been provided as Attachment 1
[not attached to this report - customers notified were XCEL Energy, Bechtel Power Corporation, TVA for Watts Bar 2 (Projected Operation 12/2015) and Preferred Metal Technologies, Inc.] to this interim notification.
"ATC Nuclear developed a systematic evaluation methodology which has been independently corroborated by industry experts to evaluate the seismic tri-axial test programs of concern conducted by ATC Nuclear. The systematic evaluation involves review of the TRS to determine if adequate test margin exists within the test data
0312812013 U.S. Nuclear Regulatory Commission OperationsCenter Event Report ease2 Part 21 (PAR) Event # 48862 when compared to the RRS, evaluation of the table test acceleration versus fixture acceleration as necessary, and when required, retesting of the component. For all program reviews completed to date (-70%of all programs) for operating licensees, all re-evaluation and re-testing has resulted in no reduction in seismic withstand capabilities and no failures. The evaluation included prioritization of operating reactors early in the process to the extent possible to ensure minimal impact to those facilities.
"Based on the successful completion of evaluations to date, ATC Nuclear is confident this issue will be resolved through the methodology established and worst-case may result in the submittal of an addenda to existing qualification reports in situations where retesting has been required for a basic component.
"ATC Nuclear will need until May 15, 2013 to conclude the evaluation process. Should, during any re-testing, a condition arise warranting notification, that notification will be immediately made at the time of discovery to the affected customer. All orders since the point of discovery have been addressed through corrective actions to prevent recurrence and are unaffected.
"The below contact information should be utilized regarding any questions.
R.A. Chalifoux Vice-President QA, ATC Nuclear Tel: (865) 384-0124 email: rchalifoux@argoturbo.com
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DN~L.~M IN HUE.L.L WI /U March 28, 2013 NRC Operations Center FAX (301) 816-5151.
Subject:
POTENTIAL 10 CFR PART 21 IERIM REPORT ATC Nuclear 777Emory Valley Road Oak Ridge, TN 37830 Information
Contact:
Ray Chalifoux - ATC Nuclear (contact information below)
ATC Nuclear in Oak Ridge, TN i.s making an initial notification of a Potential Part 21 Defect in accordance with 1o CFR 21.21(a) (2).
A recent review performed January 21, 2013 of seismic test response spectra for seismic qualification activities identified that Required Response Spectra may not have been completely enveloped for portions of the required frequency range during test performance of the Operational Basis Events (OBE's) and the Safe Shutdown Earthquake(s) (SSEs) for somecuiitbmers. .Spetif lly, sihae TRS resultssmayhave been below the provided RRS in the 10-25 Hz range in certail circurmstances. aid thus not .fullynieetiig the RRS and required acceptance criteria of BEEE 344 1975/1987/2004. The condition is the result of the instrumentation methodology and inherent tri-axial table characteristics where vibiational energy is not fully transmitted to the unit under test in all test conditions. The safe.y significance is that the Basic Component may not perform. its intended safety function during or. following a seismf& eyent exceeding the as-tested Vibration fiequencies.
ATC has demonstrated through actual testinto6 date that this lirbbabilityis very low. Many customers provide RRS that include conservatism; however, this also has not been -credited in die ATC-Nuclear evaluation methodology discussed below. The afectedeustomers,tpirehase orders, and relevant information have been provided as Attachment I to this interim notification.
ATC Nuclear developed a systemnatic nvalu.atidni' ethodology Whhzh has been idependently corroborated by industry experts to evaluate the~seismic friAaxial test. rogras..0of coinetn conductled byATC-Nuclear. The systematic evaluation involves re'view of the.TRS. fo de*t*eýminifrad&tIuate test margin exists within the test data when compared to the RRS, evaluation -ofith table: te~tK:acieleration ve6rsus fixture acceleration as necessary, and wben* required, retesting of'he component. flir hI prgram reviews completed to date -(-70%
of all programs) for operating Licensees, aD re-*wrluttllntabdtetetn",hsresuhlteditino fedtitocn in seismic withstand capabilities and nofailures. The evaafattionLin.ilbdd ploriodtion 0fdp-flting reactotsiearly in the process to the extent possible toenisure miniiiiol iai tb tbdc factlities :
Based on the successful co*tvnlie.io'n6of' eVa!uati&Aftb:eAT&ar.is cfdetytiis-icu* bereolved through the methodology established tnd *d5e6ase.1ii'te:idt £wtbe submittal of an addenda to existing qualification reports in situations where rete intgiah beet reqie:d for a basic compooet t.
ATC Nuclear will need until May 15,2013 t6.conclid;e td evalutiaion process. Should, during any re-testing, a condition arise warranting noti.fication, tilalofifi.ati will be immediatey made at-the tim e ofrdiscovery to the affected customer. All orders since the phitofdiscoieryihave been addressed through corrective actions to prevent recurrence and are unaffected.
The below contact information should be utilized regarding any questions.
Sincerely, R A. Ghalwoux Vice President QA, ATC Nuclear (865) 384 0124 rchalifouxna argzoturbo.comi Page lof 2
ATTACMENT 1: REMATNING ORDERS UNDER EVALUATION Customer PO(s), Part Nurnber(s) ATC No.
XCEL ENERGY 00034703 ASCO Solenoid 1077660 NPK8321A1V BECHTEL POWER CORP 87211/105258/ Struthers Dunn Relay/Socket 10T1930/10T3220/
TVA FOR WATTS BAR 2 222593/93603 219BBX-115/125 DC 11T1210/10T2320 PROJEaTED OPERATION PJT2015 93459 12/2015 Relay Time Delay 328D200F10XX 10T2330 130266 Switch, Temperature 40PN-ESN 1SW/TA- 10T4810 1A 130629-1 PZR Heater Breaker Panel 10T4.840 135233-1 Emerson Controller, Pneumatic 10T5270 54531OG3670170003 175554-1 Transmitter, 4-20 4ADC, Ultrasonic Level 10T7320 345-0442-190/385-5KI0-003 Moore Industries International, Isolator I0T7590 179891-2 SCT/4-20MA/4-20MA/117VAC/RF.TX(AB) 180160/233018 GE Transfer Switch 16SBXRB2A11LSM2V 1OT7610/lIT191i0 187528/242339 Vertical, Edgewise Meter, Type VX-252 10T8160/l1T2780 6068419A09 242815 Woodward Governor Signal Generator 11N2790 Ramp 9903-091 208817-1 Kurz Flow Elements 136100004 11T0300 1361D00003 339491-3 Automatic Timing Controls Relay Socket 11T10910 000-825-89-O0 Square D.Electrical Light 220869 9001KP38R9 11T1140 9001KP38G9 262924-1 Allen Bradley Limit Switch 802R-HIC 11T7240 286116 Tyco Auxiliary Switch E7012PAL004 11T7630 294621 Pump, Transfer Oil 78028B09 11T8190 FCI Flowswltch Dynatorque Gear Operator PREFERRED METAL PREFERRED INC 5782 Electrical Enclosure FLT93B-ACOO DT7 TECHNOLGIES INC WITH HWCR-10 HANDWHEEL DWG- 12T0010 N1758-778C01-SUB Dray Operator and Topworx Go Switch w/
5498 Magnet 932104-11320532, AND lIT8130 5498 TOPWORX GO SWITCH MODEL 7313528-A2 WITH MAGNET MODEL AMS7 ...
Bray Series 05 80:1 Declutchable Handwheel Gear I0T6060 5006 Electrical Disconnect Switch and Enclosure 050800-21202536 Page 2of 2