ML13161A342

ATC Nuclear, Interim Part 21 Report Involving Review of Seismic Testing Methodology

ML13161A342
Person / Time
Site:	Watts Bar
Issue date:	06/05/2013
From:	Chalifoux R A ATC Nuclear
To:	Office of Nuclear Reactor Regulation
References
48862
Download: ML13161A342 (6)

Text

0610512013 U.S. Nuclear Regulatory Commission Operations Center Event Report PajZe I*** This Event has been retracted

!!!*** This Event has been retracted

!!!Part 21 (PAR)Event# 48862 Rep Org: ATC NUCLEAR Notification Date / Time: 03/28/2013 15:29 (EDT)Supplier:

ATC NUCLEAR Event Date I Time: 01/21/2013 (EDT)Last Modification:

06/05/2013 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 06/05/2013 U.S. Nuclear Regulatory Commission Operations Center Event Report Paze 2*** This Event has been retracted i! *** This Event has been retracted H!!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"* *

• RETRACTION FROM R.A. CHALIFOUX VIA FAX AT 0957 EDT ON 6/5/13 ***The following information was obtained from ATC Nuclear via facsimile: "ATC Nuclear in Oak Ridge, TN has concluded the evaluation of a potential Part 21 defect in accordance with 10 CFR 21.21(a) (2). The evaluation for reportability with respect to the remaining licensees in Attachment 1 of the original NRC Interim Report (ML1309/ML13091A388) determined, as anticipated, no safety degradation exists.Based on the results of the evaluation, reportability under 10 CFR Part 21 is not required for this issue. Affected customers will be receiving revised documentation as appropriate."The [above] contact information should be utilized regarding any questions." Notified R1DO (Burritt), R2DO (McCoy), R3DO (Lipa), R4DO (Spitzberg) and Part 21 Group (via email).

Received at: 06/05/2013 09:55 06/05/2013 09:43 8656755399 ATC NUCLEAR TN PAGE 01/04 June 5, 2013 NRC Operations Center FAX (301) 816-5151

Subject:

UPDATE: POTENTIAL 10 CFR PART 21 INTERN REPORT ATC Nuclear 777Emory Valley Road Oak Ridge, TN 37830 Information Contact: Ray Chalifoux

-ATC Nuclear (contact inforimation below)ATC Nuclear in Oak Ridge, TN has concluded the evaluation of a Potential Part 21 Defect in accordance with 10 CFR 21.21(a) (2). The evaluation for reportability with respect to the remaining Licensees in Atlachmetit 1 of the original N.RC Interim Report (ML1309/ML13091A388 attached) determined, as anticipated, no safety degradation exists. Based on the results of the evaluation., reportability under 10 CPR Part 21 is not required for this issue. Affected customers will be receiving revised documentation as appropriate.

The below contact information should be utilized regarding any questions.

Sincerely, R. A. Chalifoux, Vice President QA, ATC Nuclear (865) 384 0124 rcb.aIifoux~iargourbo.com Page Vof 2 06/05/2813 09:43 8656755393 ATC NUCLEAR TN PAGE 02/04 ATTACMENT I: REMAINING ORDERS UNDER EVALUATION Customer PO(s) Part Number(s)

ATC No, XCEL ENERGY 00034703 ASCO Solenoid 10T7660 NPK8321A1V BECHTEL POWER CORP 87211/105258/

Struthers Dunn Relay/Socket 1OT1930/1OT3220/

TVA FOR WATTS BAR 2 222593/93603 21988X-115/125 DC 11T1210/10T2320 PROJECTED OPERATION Relay Time Delay 328D200FIOXX 10T2380 12/2015 130266 Switch, temperature 40PN-ESN1SW/TA-10T4810 1A 130629-1 PZR Heater Breaker Panel 10T4840 135233-1 Emerson Controller, Pneumatic 10T5270 545310G3670170003 175554-1 Transmitter, 4-20 MADC, Ultrasonic Level 34'5-0442-100/385-5K1O-003 101-/320 Moore industries International, Isolator 10T7590 179891-2 SCT/4-2OMA/4-2OMA/U17VAC/RF-TX(AB) 180160/233018 GE Transfer Switch 1GSB1RB2A11LSM2V 10T7610/1,1T1910 187528/242339 Vertical, Edgewise Meter, Type VX-252 10T8160/11T2780 606B419A09 242815 Woodward Governor Signal Generator 11N2790 Ramp 9903-0913 208817-1 Kurz Flow Elements 1361D0004 11T0300 1361D0003 339491-3 Automatic Timing Controls Relay Socket 11TlO910 000-825-89-00 Square D Electrical Light 220869 9001KP38R9 1ITT1140 9001KP38G9 262924-1 Allen Bradley Limit Switch 802R-H1C 11T7240 286116 Tyco Auxiliary Switch E7012PALO04 11T7630 294621 Pump, Transfer Oil 78028109 11T8190 FCI Flowswitch PREFERRED METAL Dynatorque Gear Operator 5782 Electrical Enclosure FLT93B-ACOO DT7 I.2T0010 TECHNOLGIES INC WITH HWCR-10 HANDWHEEL DWG-N1758-778C01-SUB Bray Operator and Topworx Go Switch w/5498 Magnet 932104-11320532, AND 11T8130 5498 TOPWORX GO SWITCH MODEL 7313528-A2 WITH MAGNET MODEL AMS7 Bray Series 05 80:1 Declutchable 5006 Handwheel Gear IDT6060 Electrical Disconnect Switch and Enclosure 050800-21202536 Page 2of 2 PAGE 03/04 06/05/2013 09:43 8656755399 ATC NUCLEAR TN 03/2&8_203 U.S. Nctlear Reguaftory Conmmission Operations Center Event Report Page)I Part 21 (PAR)Event# 48862 Rep Org: ATC NUCLEAR NoLIFUXaotincDaon te I Time 03/28/203 15:29 (EDT)Supplierg ATC NUCLEAR Event DatG I Time: 0112112013 (EDT)1 R tst ModifiGationC 03/28/2013 Region: 1 Docket #EM City- OAK RIDGE Agreement State, Yes County: License IP State: TIN NRC Notified by: R. A_ CHALIFOUX Notifications:

PAUL KROHN R1 DO HO Ops Officer. STEVE SANDIN DEBORAH SEYMOUR R12DO, 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 quallfication 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 I[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."ATO Nuclear developed a systematic evaluation methodology which has been independently corroborated by Industry experts to evaluate the seismic tri-axiai 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 06/05/2013 09:43 8656755399 ATC NUCLEAR TN PAGE 04/04 (0W812013 U.S. Nuclear Regulatory Commnussion Operations Center Event Report Part 21 (PAR) Event # 48862 when compared to the RRS, evaluation of the table test acceleration versus fixture acceleration as necessary, end 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.

RA. Chalifoux Vice-President OA, ATO Nuclear Tel: (865) 384-0124 ernall: rchalifoux@argoturbo.com