ENS 51030
ENS Event | |
|---|---|
05:00 Apr 30, 2015 | |
| Title | Potentially Unqualified Component in Certain Allen Bradley Timing Relays |
| Event Description | The following is an excerpt from a document received from the licensee via email:
Report of potential 10 CFR Part 21, Allen Bradley Timing Relay Model 700RTC Pursuant to 10 CFR 21.21(d)(3)(ii), AZZ/NLI is providing written notification of the identification of a potential failure to comply. On the basis of our evaluation, it is determined that AZZ/NLI does not have sufficient information to determine if the subject condition would, or has, created a Substantial Safety Hazard or would have created a Technical Specification Safety Limit violation as it relates to the subject plant applications. The specific part which fails to comply or contains a defect: As of 2009-2010, Allen Bradley relays base model 700RTC, contain an unevaluated CPLD (Complex Programmable Logic Device). This was an unpublished design change that was implemented to replace an obsolete integrated circuit chip. The undocumented design change did not result in a part number change from Allen-Bradley. There was no change to the appearance of the relay that would identify any design changes were made to the relay configuration. Therefore, NLI qualification/dedication of the relays after 2009 have not included additional testing for the new CPLD component. The timing relay model 700RTC has been dedicated/qualified for multiple applications for various plants. Between 2009-2010 Allen Bradley made a design change without changing the part number of the commercial relay or providing any documented evidence of a design change. The manufacturer specification data sheets maintain the classification that the relays are 'solid state', which would imply that there are no digital devices installed in the relay. However, after inspection of the internals of the timing relay (Figure 2), it has been identified that the unit does contain a CPLD which meets the definition of a digital device under the guidance of NEI 01-01. Potentially affected plants include Browns Ferry, Ginna, Millstone, Nine Mile Point, North Anna, Ft. Calhoun, Perry, River Bend, South Texas Project, and St. Lucie.
AZZ/NLI Nuclear Logistics provided additional information regarding Part 21 Report No: P21-04302015, Rev. 1. Notified R1DO (Rogge), R2DO (Nease), R3DO(Skokowski), R4DO (Kellar), and PART 21/50.55 REACTORS via email.
AZZ/NLI Nuclear Logistics provided Revision 2 to Part 21 Report No: P21-04302015 to correct the referenced EPRI TR-102323 Rev. 3 to Rev. 4 and change 'timing' contacts to 'instantaneous' contacts as shown below: (vii) The corrective action which has been, is being, or will be taken; the name of the individual or organization responsible for the action; and the length of time that has been or will be taken to complete the action. The relays that are currently in stock at NLI have been placed on hold until after the units have been determined to be qualified for the specific application. NU has completed the EMC qualification testing per the requirements of EPRI TR-102323 Rev. 4 for the following tests, as applicable: CE101, CE102, RE101, RE102, RS101, RS103, CS101, CS114, CS115 and CS116. The results were satisfactory with exception of the following condition: During Conducted Susceptibility CS114 onto the power lines, with the timing circuit in operation, the instantaneous contacts exhibited chatter in the range of 2.6 MHz to 20.3 MHz. The unit requires a ferrite to be installed onto the input power lines of the relay with 3 turns through the ferrite core. In this modified configuration, the relay was not susceptible to Conducted Susceptibility and successfully passed the required test per CS114. Notified R1DO (Lilliendahl), R2DO (Guthrie), R3DO(Kunowski), R4DO (Werner), and PART 21/50.55 REACTORS via email.
AZZ/NLI Nuclear Logistics provided additional information regarding Part 21 Report No: P21-04302015, Rev. 3, correcting the date the change occurred to October 2008. Notified R1DO (Jackson), R2DO (Shaeffer), R3DO (Riemer), R4DO (Proulx), and PART 21/50.55 REACTORS via email.
AZZ/NLI Nuclear Logistics is making a word correction in Part 21 Report No: P21-04302015, Rev. 4. Notified R1DO (Dimitriadis), R2DO (Michel), R3DO (Cameron), R4DO (Kellar), and PART 21/50.55 REACTORS via email. |
| Where | |
|---|---|
| Allen Bradley Fort Worth, Texas (NRC Region 4) | |
| Organization: | Azz/Nli Nuclear Logistics, Inc |
| Reporting | |
| 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect | |
| Time - Person (Reporting Time:+32.53 h1.355 days <br />0.194 weeks <br />0.0446 months <br />) | |
| Opened: | Tracy Bolt 13:32 May 1, 2015 |
| NRC Officer: | Daniel Mills |
| Last Updated: | Aug 26, 2016 |
| 51030 - NRC Website | |
Allen Bradley with 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect | |
WEEKMONTHYEARENS 510302015-04-30T05:00:00030 April 2015 05:00:00
[Table view]10 CFR 21.21(d)(3)(i), Failure to Comply or Defect Potentially Unqualified Component in Certain Allen Bradley Timing Relays ENS 505392014-08-12T20:08:00012 August 2014 20:08:00 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect Part 21 - Defective Allen Bradley Relay 2015-04-30T05:00:00 | |