ENS 50428
ENS Event | |
|---|---|
04:00 Sep 4, 2014 | |
| Title | Potential Part 21 Issue on Motor Dedications Performed Prior to June 2002 |
| Event Description | The following information was obtained via fax:
Pursuant to the 10 CFR Part 21 requirements, this letter is to notify the NRC of a potential Part 21 condition. While performing research on questions regarding acceleration presented by First Energy/Davis Besse, Schulz Electric identified that the acceleration calculation used to determine acceleration times for new motors which it dedicated before June 7, 2002 (at which time Schulz developed a shop instruction for calculating acceleration using the proper calculation) was incorrect. The use of this incorrect calculation could potentially cause misleading acceleration times, and therefore motors which may not perform as required by First Energy/Davis Besse and/or other customers. Schulz Electric will perform an evaluation to identify: 1. All projects that had acceleration calculations performed as part of a motor dedication prior to June 7, 2002. 2. The methodology used to perform the calculations. 3. Whether the actual acceleration times meet the acceleration/performance requirements of the applicable customers. Schulz Electric has the capability and chooses to perform the evaluation to determine if a defect exists. It is the responsibility of Schulz Electric to inform the purchaser(s), and any affected licensees. Schulz Electric will complete the specified evaluation of the circumstances within sixty (60) days of discovery of the potential defect. The NRC will be provided a copy of Schulz Electric's evaluation report. If you have any questions, please feel free to contact me [Charles 'Bill' Eldredge] by phone 203.562.5811, by fax 203.562.1082, or email me at Eldredge@schulzelectric.com.
The following is a synopsis of information received via facsimile: FINAL EVALUATION RE: EVENT # 50428 Customer: First Energy / Davis Besse. Parts: 3 AC Motors - 1) 400 HP, 1) 450 HP, 1) 600 HP. All located at First Energy / Davis Besse. Description of Defect/Nonconformance: Schulz Electric identified that the methodology for determining acceleration for the subject motors was incorrect. When the acceleration times were calculated using the correct methodology, it was determined that the three motors will not meet the acceleration requirements for 70% voltage as required by the purchase order. Corrective Action: The customer has been informed of the nonconformance and Schulz has worked with the customer to generate performance curves at various voltage levels and pump head requirements. Other Plants Affected: None. Notified R1DO (Krohn), R2DO (Widmann), R3DO (McCraw), R4DO (Whitten) and Part 21 Reactors Group. |
| Where | |
|---|---|
| Schulz Electric New Haven, Connecticut (NRC Region 1) | |
| Organization: | Schulz Electric |
| Reporting | |
| 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect | |
| Time - Person (Reporting Time:+31.13 h1.297 days <br />0.185 weeks <br />0.0426 months <br />) | |
| Opened: | Bill Eldredge 11:08 Sep 5, 2014 |
| NRC Officer: | Howie Crouch |
| Last Updated: | Sep 30, 2014 |
| 50428 - NRC Website | |
Schulz Electric with 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect | |
WEEKMONTHYEARENS 546642020-03-12T04:00:00012 March 2020 04:00:00
[Table view]10 CFR 21.21(d)(3)(i), Failure to Comply or Defect Part 21 Notification - Motor Bearing Oil Reservoir Recoating ENS 504282014-09-04T04:00:0004 September 2014 04:00:00 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect Potential Part 21 Issue on Motor Dedications Performed Prior to June 2002 2020-03-12T04:00:00 | |