ENS Event | |
|---|---|
06:00 Dec 1, 2021 | |
| Title | Part 21 - 15V and 48 V Power Supply Defect |
| Event Description | This is a non-emergency notification required by 10 CFR 21.21(d)(3)(i). A written notification in accordance with 10 CFR 21.21(d)(3)(ii) will be provided in 30 days.
On November 10, 2021, Callaway Plant received written notification from Paragon Energy Solutions, LLC, pursuant to 10 CFR 21.21(b), which identified a deviation associated with the DC/DC converter in two power supplies, NLI-STM15-15M20 (15 VDC) and NLI-STM48-14M20 (48 VDC) that had been sent to Paragon for evaluation and failure analysis following failures of individual components within the power supplies at Callaway Plant. The notification identified the following failed components: For the NLI-STM15-15M20 [15 VDC] power supply, the failed components were the Vicor Module, P/N: V150A28C500BL, and the DC/DC Converter, Murata P/N: NKE1212SC, Date code: G1511 For the NLI-STM48-14M20 [48 VDC] power supply, the failed component was the DC/DC Converter, Murata P/N: NKE1212SC, Date code: G1511 Fourteen of these power supplies (in total) are used in three Balance of Plant Engineered Safety Feature Actuation System (BOP-ESFAS) cabinets and two Load Shed and Emergency Load Sequencer (LSELS) cabinets. Based upon the 10 CFR 21.21(b) transfer from Paragon Energy Solutions, Callaway Plant has determined that a Substantial Safety Hazard could be created by the failure of the power supplies. The responsible officer was notified on December 1, 2021. The NRC Resident Inspector at Callaway Plant has been notified. |
| Where | |
|---|---|
| Ameren Ue Fulton, Missouri (NRC Region 4) | |
| Organization: | Callaway |
| Reporting | |
| 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect | |
| Time - Person (Reporting Time:+31.6 h1.317 days <br />0.188 weeks <br />0.0433 months <br />) | |
| Opened: | Todd Witt 13:36 Dec 2, 2021 |
| NRC Officer: | Mike Stafford |
| Last Updated: | Dec 2, 2021 |
| 55620 - NRC Website | |
Ameren Ue with 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect | |
WEEKMONTHYEARENS 556202021-12-01T06:00:0001 December 2021 06:00:00
[Table view]10 CFR 21.21(d)(3)(i), Failure to Comply or Defect Part 21 - 15V and 48 V Power Supply Defect 2021-12-01T06:00:00 | |