Event Notification Report for May 18, 2022

EN Revision Imported Date: 5/18/2022

EN Revision Text: UNPLANNED CONTAMINATION EVENT

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."


* * * UPDATE ON 5/17/22 AT 1305 EDT FROM BARRY LOVE TO BRIAN PARKS * * *

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 REPORT - UNDERDOSE MEDICAL EVENT

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.

AUTOMATIC SCRAM DUE TO ELECTRICAL TRANSIENTS

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.