Event Notification Report for December 03, 2021

U.S. Nuclear Regulatory Commission
Operations Center

12/02/2021 - 12/03/2021

55611 55619 55620
Non-Agreement State
Event Number: 55611
Rep Org: Clearwater Paper Corporation
Licensee: Clearwater Paper Corporation
Region: 4
City: Lewiston   State: ID
License #: 11-27075-01
Agreement: N
NRC Notified By: Bill Hoesman
HQ OPS Officer: Lloyd Desotell
Notification Date: 11/25/2021
Notification Time: 12:15 [ET]
Event Date: 11/24/2021
Event Time: 14:00 [MST]
Last Update Date: 11/25/2021
Emergency Class: Non Emergency
10 CFR Section:
30.50(b)(2) - Safety Equipment Failure
Person (Organization):
Werner, Greg (R4)
NMSS_Events_Notification, (EMAIL)
Event Text
EN Revision Imported Date: 12/3/2021

The following event synopsis was received by the licensee via phone call and email:

The Headquarters Operations Officer was notified by the licensee that during radiography operations, a source was stuck in the guide tube. The radiography operations were conducted by a contractor (Northwest Inspection).
The contractor established a 2 mrem/hr perimeter prior to conducting the radiography work. When the source became stuck in the guide tube, the contractor Radiation Safety Officer deployed to the site was able to successfully retrieve the source without incident.

Gauge : QSA Model 880 containing a 17.4 Ci Ir-192 source.

Power Reactor
Event Number: 55619
Facility: Quad Cities
Region: 3     State: IL
Unit: [1] [] []
RX Type: [1] GE-3,[2] GE-3
NRC Notified By: Ron Snook
HQ OPS Officer: Brian Lin
Notification Date: 12/02/2021
Notification Time: 00:58 [ET]
Event Date: 12/01/2021
Event Time: 18:47 [CST]
Last Update Date: 12/02/2021
Emergency Class: Non Emergency
10 CFR Section:
50.72(b)(3)(v)(D) - Accident Mitigation
Person (Organization):
Stoedter, Karla (R3)
Power Reactor Unit Info
Unit SCRAM Code RX Crit Initial PWR Initial RX Mode Current PWR Current RX Mode
1 N Y 100 Power Operation 100 Power Operation
Event Text
EN Revision Imported Date: 12/3/2021


"At 1847 CST on December 1, 2021, it was discovered that the HPCI [high pressure coolant injection] system was inoperable. Due to this inoperability, the system was in a condition that could have prevented the fulfillment of a safety function; therefore, this condition is being reported as an eight-hour, non-emergency notification per 10 CFR 50.72(b)(3)(v)(D). The Unit 1 RCIC [reactor core isolation cooling] system was Operable during this time period. There was no impact on the health and safety of the public or plant personnel. The NRC Resident has been notified."

Unit 1 HPCI operability was restored at 2110 CST.

Part 21
Event Number: 55620
Rep Org: Callaway
Licensee: Ameren Ue
Region: 4
City: Fulton   State: MO
County: Callaway
License #:
Agreement: N
Docket: 05000483
NRC Notified By: Todd Witt
HQ OPS Officer: Mike Stafford
Notification Date: 12/02/2021
Notification Time: 13:36 [ET]
Event Date: 12/01/2021
Event Time: 00:00 [CST]
Last Update Date: 12/02/2021
Emergency Class: Non Emergency
10 CFR Section:
21.21(d)(3)(i) - Defects And Noncompliance
Person (Organization):
Taylor, Nick (R4)
Part 21/50.55 Reactors, - (EMAIL)
Event Text

"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."

Page Last Reviewed/Updated Friday, December 03, 2021