ENS 55551

v t e ENS Event
04:00 Jun 18, 2021
Title	Part 21 Report - Failure of a Basler Electric Transformer in a York Temperature Control Module
Event Description	The following is a synopsis of information received via facsimile: On June 18, 2021, STP Nuclear Operating Company returned a York TCM-1A temperature control module with the reported issue that the module would not respond in auto or manual vane control and that internal relays 1R and 2R would not pick up. The subject temperature control module was previously returned by STP Nuclear Operating Company to United Controls International (UCI) for refurbishment and modification, after which it was returned by UCI to STP Nuclear Operating Company on March 13, 2017. Troubleshooting performed by UCI identified that the secondary of the Basler Electric BE13410001 transformer that is used to isolate and step down the input voltage from 115V AC to 22V AC had an open circuit. When the subject transformer was bypassed, the module operated as designed. UCI is unable to determine the cause of the transformer failure. Post refurbishment/modification testing performed by UCI included verifying functionality of the unit before and after performance of a 48 hr. burn-in period. The only facility that is listed as being affected is STP Nuclear Operating Company. If you have any questions or wish to discuss this matter or this report, please contact: Wesley Hickle, Engineering Manager, whickle@unitedcontrols.com, 470-610-0870.

ENS 55551 +/-
Where
United Controls International Norcross, Georgia (NRC Region 2)
Organization:	United Controls International
Reporting

10 CFR 21.21(d)(3)(i), Failure to Comply or Defect
Time - Person (Reporting Time:+3181.23 h132.551 days <br />18.936 weeks <br />4.358 months <br />)
Opened:	Rob Hale 17:14 Oct 28, 2021
NRC Officer:	Donald Norwood
Last Updated:	Oct 28, 2021
55551 - NRC Website
v • d • e

v t e Emergency Notification System
United Controls International with 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect
WEEKMONTHYEAR2023-04-12T04:00:00 [Table view]
[ENS list for United Controls International]

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