Event Notification Report for December 08, 2023
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
12/07/2023 - 12/08/2023
Part 21
Event Number: 56821
Rep Org: Curtiss Wright Flow Control Co.
Licensee:
Region: 4
City: Brea State: CA
County:
License #:
Agreement: Y
Docket:
NRC Notified By: Loretta Anaya
HQ OPS Officer: Lawrence Criscione
Notification Date: 10/27/2023
Notification Time: 20:57 [ET]
Event Date: 08/30/2023
Event Time: 00:00 [PDT]
Last Update Date: 12/07/2023
Emergency Class: Non Emergency
10 CFR Section:
21.21(a)(2) - Interim Eval Of Deviation
Person (Organization):
Deese, Rick (R4DO)
Part 21/50.55 Reactors, - (EMAIL)
Event Text
EN Revision Imported Date: 12/8/2023
EN Revision Text: PART 21 - INCONSISTENT POTENTIOMETER RESISTANCE VALUES
The following is a synopsis of information that was provided by Curtiss-Wright via fax:
On August 30, 2023, Enertech (a division of Curtiss-Wright) determined a potential defect for potentiometer part number D2060S based on the inspection of a returned items from Korea Hydro and Electro Power in Korea. A number of returned potentiometers exhibited inconsistent resistance values at certain stroke positions. The potentiometers are used in modulating actuators.
A shorter wiper was used in the manufacture of the potentiometers that introduced the possibility of intermittent separation between the wiper (sliding contact) and the coil at certain stroke positions, resulting in momentary signal interruptions.
The evaluation at Enertech is also ongoing regarding the potential effects of wiper separation on the functionality of the modulating actuator and will not be completed within 60 days. The expected date of completion is December 20, 2023.
South Texas Project Electric Generating Station (Operator: STP Nuclear Operating Company) purchased defective modulating actuators on four occasions.
Questions should be directed to Loretta Anaya, Quality Assurance Manager, Enertech, at 714-982-1856.
Known potentially affected plant(s): South Texas Project
* * * UPDATE ON 12/7 AT 1807 EST FROM SANDRA VALDIVIA TO ERNEST WEST * * *
Enertech has completed their evaluation of the deviation described in their interim report submitted on 27 October, 2023, and concluded that the deviation does not potentially create a substantial safety hazard.
Notified R4DO (Dixon) and Part 21 Group (Email)
Agreement State
Event Number: 56876
Rep Org: Arizona Dept of Health Services
Licensee: Banner University MC - Tucson
Region: 4
City: Tucson State: AZ
County:
License #: 10-044
Agreement: Y
Docket:
NRC Notified By: Brian Goretzki
HQ OPS Officer: Thomas Herrity
Notification Date: 11/29/2023
Notification Time: 11:45 [ET]
Event Date: 11/28/2023
Event Time: 00:00 [MST]
Last Update Date: 11/30/2023
Emergency Class: Non Emergency
10 CFR Section:
Agreement State
Person (Organization):
Taylor, Nick (R4DO)
NMSS_EVENTS_NOTIFICATION (EMAIL)
Event Text
AGREEMENT STATE REPORT - Y-90 UNDERDOSE
The following information was received from the Arizona Department of Health Services (the Department) via email:
"On November 29, 2023, the Department received notification from the licensee about a medical event involving Y-90 TheraSpheres that occurred on 11/28/2023. A patient was prescribed a dose of 1.766 GBq, but was delivered 1.019 GBq. The dose delivered was 57.7 percent of the prescribed dose. The Department has requested additional information and continues to investigate the event."
A Medical Event may indicate potential problems in a medical facility's use of radioactive materials. It does not necessarily result in harm to the patient.