ENS 48146
ENS Event | |
|---|---|
04:00 Aug 1, 2012 | |
| Title | Potential Part 21 Issue Related to Tyco Timing Relay |
| Event Description | The following information was provided via facsimile:
QualTech NP is providing this notification as a potential 10 CFR Part 21 issue. We have discovered a manufacturing defect in a timing relay which prevents the relay from operating at a specific setting. This relay was purchased as a commercial grade item and dedicated through our dedication process for safety related applications at our Cincinnati facility. The subject equipment is TYCO Model CNT-35-96, a timing relay with adjustable trip ranges from seconds up to 9,990 hours0.0115 days <br />0.275 hours <br />0.00164 weeks <br />3.76695e-4 months <br />. QualTech NP has recently identified a failure mode for this relay in that the device will not trip in the 10H setting. In communications with the manufacturer, they have confirmed that there is a flaw in the design that prevents this specific setting from tripping. QualTech NP has only sold this unit to two plants, both Exelon. We recognize, however that other utilities could have these installed. Based on the information in hand we are evaluating the need for a 10 CFR Part 21 notification. Since the item was qualified under the EPRI SQURTS [Seismic Qualification Reporting and Testing Standardization] Program, the recommended corrective action is to notify EPRI of the condition in order for SQURTS members to perform an impact evaluation. Additional details will be provided in the formal written report. Please contact Tim Franchuk at 513-528-7900, ext. 176 (office), [redacted] or via email tfranchuk@curtisswright.com for any additional information.
The licensee has revised the third paragraph to read as follows: QualTech NP has only sold this unit to two plants, Exelon LaSalle and Quad Cities. We recognize, however that other utilities could have these installed. Based on the information in hand we are evaluating the need for a 10 CFR Part 21 notification. Since the item was qualified under the EPRI SQURTS [Seismic Qualification Reporting and Testing Standardization] Program, QualTech NP recognizes that other SQURTS members may have used the qualification basis as part of licensee dedication activities, and therefore, will notify EPRI of the condition. Notified R3DO (Kunowski) and Part 21 group via email.
The following update was received via fax: QualTech NP is issuing this letter to provide additional details from our initial notification dated July 31, 2012 with regard to a potential defect in a timing relay (Log No. 2012-31-00 and 2012-031-01). The affected equipment is TYCO Model CNT 35-96 and the defect is the failure of the component to trip in the 10H setting. The following actions have been taken since the time of the initial notification. QuaITech NP has notified EPRI, who in turn has notified SQURTS members of the defect in the 10H setting. In addition, supplemental testing has been performed to provide reasonable assurance that the defect is limited to the 10H setting. Please contact Tim Franchuk at 513-528-7900 ext. 176 (office) or via email tfranchuk@curtisswright.com for any additional information. Notified R3DO Giessner) and Part 21 group via email. |
| Where | |
|---|---|
| Qualtech Np Curtiss Wright Cincinnati, Ohio (NRC Region 3) | |
| Organization: | Qualtech Np Curtiss Wright |
| Reporting | |
| 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect | |
| Time - Person (Reporting Time:+6.93 h0.289 days <br />0.0412 weeks <br />0.00949 months <br />) | |
| Opened: | Tim Franchuk 10:56 Aug 1, 2012 |
| NRC Officer: | Bill Huffman |
| Last Updated: | Sep 10, 2012 |
| 48146 - NRC Website | |
Qualtech Np Curtiss Wright with 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect | |
WEEKMONTHYEARENS 481462012-08-01T04:00:0001 August 2012 04:00:00
[Table view]10 CFR 21.21(d)(3)(i), Failure to Comply or Defect Potential Part 21 Issue Related to Tyco Timing Relay 2012-08-01T04:00:00 | |