Event Notification Report for May 18, 2022

U.S. Nuclear Regulatory Commission
Operations Center

05/17/2022 - 05/18/2022

55861 55892 55899
Fuel Cycle Facility
Event Number: 55861
Facility: Louisiana Energy Services
RX Type:
Comments: Uranium Enrichment Facility
Gas Centrifuge Facility
Region: 2
City: Eunice   State: NM
County: Lea
License #: SNM-2010
Docket: 70-3103
NRC Notified By: Barry Love
HQ OPS Officer: Brian Lin
Notification Date: 04/27/2022
Notification Time: 11:23 [ET]
Event Date: 02/28/2022
Event Time: 07:35 [MDT]
Last Update Date: 05/17/2022
Emergency Class: Non Emergency
10 CFR Section:
70.50(b)(1) - Unplanned Contamination
Person (Organization):
Miller, Mark (R2DO)
NMSS_Events_Notification, (EMAIL)
Event Text
EN Revision Imported Date: 5/18/2022


The following information was provided by the licensee via email:

"The plant is in a safe configuration. NRC Region II re-exited an inspection on April 26, 2022 from an inspection which was conducted March 21st through the 24th. During this exit, an event was reclassified as a Non-Cited Violation for failure to report an event. As a result, UUSA [Urenco-USA] is reporting this event as a 24-hour Report per the NRC's inspection.

"On February 28, 2022, water was discovered on the floor of the Liquid Effluent Collection and Transfer System (LECTS) room. The water was leaking from the slab tanks berm into the non-Radiological Controlled Area floor. The area was conservatively and promptly roped off and signage was posted. Radiological readings in the area were taken and found to be less than background and the the spill was cleaned up that day.

"Historical issues are being reviewed and will be added to this notification per the NRC's position shared with UUSA.

"This issue has been entered in UUSA's corrective action program as EV 149668 and 149975."


The following update was provided by the licensee via email:

"As a result of this Event Notification, a review of Extent of Condition was performed.

"This Extent of Condition revealed nine historical examples of unplanned contamination events that resulted in expansions of Contaminated Areas that were not reported under 10 CFR 70.50(b)(1) as required by regulation.

"These conditions occurred on March 3, 2016 (EV 111023), April 14, 2016 (EV 1129221), August 4, 2016 (EV 113877), December 7, 2016 (EV 116283), February 23, 2017 (EV 117238), November 24, 2019 (EV 136211), November 29, 2021 (EV 148894), February 28, 2022 (EV 149668), and April 14, 2022 (EV 151253).

"These events have been investigated and corrected during the approximate time period in which they were identified. No contamination events are ongoing at UUSA at this time."

The Licensee will notify the NRC Region 2 Inspector.

Notified R2DO (Miller) and NMSS Events Notifications via e-mail.

Agreement State
Event Number: 55892
Rep Org: California Radiation Control Prgm
Licensee: City of Hope
Region: 4
City: Duarte   State: CA
License #: 0307-19
Agreement: Y
NRC Notified By: Robert Greger
HQ OPS Officer: Donald Norwood
Notification Date: 05/10/2022
Notification Time: 23:57 [ET]
Event Date: 05/10/2022
Event Time: 00:00 [PDT]
Last Update Date: 05/11/2022
Emergency Class: Non Emergency
10 CFR Section:
Agreement State
Person (Organization):
Gaddy, Vincent (R4DO)
Event Text

The following information was received via e-mail:

"The City of Hope Radiation Safety Officer contacted LA County Radiation Management (LA County) on May 10, 2022 to report a Medical Event that occurred on the same day at City of Hope in Duarte, CA. The patient was underdosed during a Selective Internal Radiation Therapy (SIRT) treatment for liver cancer that involved the administration of SIR-Spheres yttrium-90 (Y-90) resin microspheres. The prescribed dose to the patient was 10 mCi, but the dose delivered to the patient was only 6.42 mCi due to a leakage caused by a loose tubing connection.

"City of Hope will conduct an investigation to gain a better understanding of the details of the event."

California 5010 Number: 051022

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.

Power Reactor
Event Number: 55899
Facility: Peach Bottom
Region: 1     State: PA
Unit: [2] [] []
RX Type: [2] GE-4,[3] GE-4
NRC Notified By: Linell, Bill
HQ OPS Officer: Brian P. Smith
Notification Date: 05/16/2022
Notification Time: 19:51 [ET]
Event Date: 05/16/2022
Event Time: 15:52 [EDT]
Last Update Date: 05/16/2022
Emergency Class: Non Emergency
10 CFR Section:
50.72(b)(2)(iv)(B) - RPS Actuation - Critical
50.72(b)(3)(iv)(A) - Valid Specif Sys Actuation
Person (Organization):
Lilliendahl, Jon (R1DO)
Power Reactor Unit Info
Unit SCRAM Code RX Crit Initial PWR Initial RX Mode Current PWR Current RX Mode
2 A/R Y 100 Power Operation 0 Hot Standby
Event Text

The following information was provided by the licensee via fax:

"Unit 2 experienced multiple electrical transients resulting in a Group I Primary Containment Isolation Signal (PCIS) isolation and subsequent unit reactor scram. Low reactor water level during the automatic scram caused PCIS Group II and III isolation signals. Following the PCIS Group I isolation, all main steam lines isolated. All control rods inserted and all systems operated as designed."

The following additional information was obtained from the licensee via phone in accordance with Headquarters Operations Officers Report Guidance:

Peach Bottom Unit 2 automatically scrammed from 100 percent power due to an electrical transient and subsequent PCIS Group I isolation (Main Steam Isolation Valve closure). Unit 2 lost main feedwater due to the PCIS Group I isolation, however, all other systems responded as expected following the scram. High Pressure Coolant Injection is maintaining pressure control while Condensate Pumps are maintaining inventory. The unit is currently stable and in Mode 3. Peach Bottom Unit 3's Adjustable Speed Drives were impacted by the electrical transients and the unit reduced power to 98 percent power.

The NRC Resident Inspector was notified.

Page Last Reviewed/Updated Wednesday, May 18, 2022