Home NRC Library Document Collections Events, Reports Associated with Event Notification Reports 2020

Event Notification Report for July 21, 2020

U.S. Nuclear Regulatory Commission
Operations Center

Event Reports For
7/20/2020 - 7/21/2020

** EVENT NUMBERS **

Agreement State	Event Number: 54774
Rep Org: VIRGINIA RAD MATERIALS PROGRAM Licensee: ECS Mid-Atlantic, LLC Region: 1 City: Manassas State: VA County: Prince William Co. License #: 683-314-3 Agreement: Y Docket: NRC Notified By: Asfaw Fenta HQ OPS Officer: Brian Lin	Notification Date: 07/10/2020 Notification Time: 11:12 [ET] Event Date: 07/09/2020 Event Time: 00:00 [EDT] Last Update Date: 07/10/2020
Emergency Class: Non Emergency 10 CFR Section: Agreement State	Person (Organization): ANTHONY DIMITRIADIS (R1DO) NMSS_EVENTS_NOTIFICATION (EMAIL)

Event Text

AGREEMENT STATE REPORT - PORTABLE MOISTURE DENSITY GAUGE DAMAGED

The following report was received from the Commonwealth of Virginia via email:

"On July 9, 2020, a representative of the Virginia Radioactive Materials Program (VRMP) received a report from a licensee through the Virginia Department of Emergency Management that a portable nuclear moisture /density gauge was damaged at a temporary jobsite in Manassas, Virginia. The VRMP contacted the licensee immediately and learned that a Bobcat V519 forklift struck the gauge (CPN MC1 Elite, Serial # 30950, containing 10 milliCuries of Cesium-137 and 50 milliCuries of Americium-241/Beryllium). The incident occurred while the gauge operator was running a gauge standardization count in front of the forklift. The guide tube of the gauge was bent and the case was scratched. However, the sources were in the shielded position and the shielding integrity was not damaged. The licensee performed a survey of the gauge and readings observed were less than 0.4 mR/hr at three (3) feet distance from the gauge. The gauge was put in its transport box and returned to the Manassas office. Wipe test samples were taken and results are pending. The VRMP is working with the licensee to obtain additional information and this report will be updated once the licensee's investigation is complete and the information is received."

Virginia report no.: VA-20-003

Agreement State	Event Number: 54775
Rep Org: CALIFORNIA RADIATION CONTROL PRGM Licensee: Regents of the Univeristy of California, Los Angeles Region: 4 City: Los Angeles State: CA County: License #: 1335-19 Agreement: Y Docket: NRC Notified By: Andrew Taylor HQ OPS Officer: Solomon Sahle	Notification Date: 07/10/2020 Notification Time: 20:18 [ET] Event Date: 07/08/2020 Event Time: 00:00 [PDT] Last Update Date: 07/10/2020
Emergency Class: Non Emergency 10 CFR Section: Agreement State	Person (Organization): VINCENT GADDY (R4DO) NMSS_EVENTS_NOTIFICATION (EMAIL) GRETCHEN RIVERA-CAPELLA (NMSS DAY)

Event Text

AGREEMENT STATE REPORT - MEDICAL EVENT

The following report was received from the State of California via email:

"On July 10, 2020, the Radiation Safety Officer for the University of California, Los Angeles, notified the Radiologic Health Branch of a Medical Event that occurred with a Varian High Dose Afterloader with an Ir-192 source during an ovarian cancer treatment. The prescribed dose to the intended organ was 24 Gray (2400 rad). Due to an incorrect entry of the catheter length into the treatment delivery system, an unintended dose of 21.8 Gray (2180 rad) was estimated to have been delivered to the large bowel. The dose delivered to the intended organ was initially estimated at 0 Gray (0 rad). The patient and the patient's physician were notified. The licensee's investigation into this medical event is ongoing and will be reviewed further by the California Department of Public Health"

California 5010 report no: 071020

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: 54792
Facility: Davis Besse Region: 3 State: OH Unit: [1] [] [] RX Type: [1] B&W-R-LP NRC Notified By: Alan Filipiak HQ OPS Officer: Thomas Kendzia	Notification Date: 07/20/2020 Notification Time: 16:36 [ET] Event Date: 07/19/2020 Event Time: 20:03 [EDT] Last Update Date: 07/20/2020
Emergency Class: Non Emergency 10 CFR Section: 50.72(b)(2)(xi) - Offsite Notification	Person (Organization): HIRONORI PETERSON (R3DO)

Unit

SCRAM Code

RX Crit

Initial PWR

Initial RX Mode

Current PWR

Current RX Mode

100

Power Operation

100

Power Operation

Event Text

OFFSITE NOTIFICATION - EMERGENCY SIREN FAILURE

"In the evening of 7/19/20, a report was received from Ottawa County Sheriff Dispatch personnel that a single siren had sounded. Review of the siren system computer log determined Siren 202 in Carroll Township had malfunctioned and sounded at approximately 2003 EDT, and sounded a second time at approximately 2045 EDT while the siren was being polled for troubleshooting. Personnel were dispatched to Siren 202 to deenergize both the AC and DC power to prevent additional soundings. The cause of the siren sounding is under review, but it occurred following storms passing through the area.

"This notification is being made solely as a four-hour, non-emergency notification for a Notification of Other Government Agency. This event is reportable in accordance with 10 CFR 50.72(b)(2)(xi).

"There was no impact on the health and safety of the public or plant personnel. The NRC Resident Inspector has been notified."

Power Reactor	Event Number: 54794
Facility: Browns Ferry Region: 2 State: AL Unit: [1] [2] [3] RX Type: [1] GE-4,[2] GE-4,[3] GE-4 NRC Notified By: Todd Christensen HQ OPS Officer: Thomas Kendzia	Notification Date: 07/20/2020 Notification Time: 18:11 [ET] Event Date: 07/20/2020 Event Time: 13:25 [CDT] Last Update Date: 07/20/2020
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): MARK MILLER (R2DO)

Unit

SCRAM Code

RX Crit

Initial PWR

Initial RX Mode

Current PWR

Current RX Mode

100

Power Operation

M/R

100

Power Operation

100

Power Operation

Event Text

BIOFOULING OF INTAKE STRUCTURE LEADS TO MANUAL REACTOR SCRAM OF UNIT 2 AND DOWNPOWER OF UNITS 1 & 3

"On July 20, 2020, at 1325 hours Central Daylight Time, Brown's Ferry Unit 2 inserted a manual reactor scram due to degrading main condenser vacuum from marine biofouling at the intake structure. Brown's Ferry Unit 1 performed a down power to 43% and Unit 3 down powered to 76%. Conditions are stable on both Unit 1 and 3 following unit down power.

"Primary Containment Isolations Systems received an actuation signal for groups 2, 3, 6, and 8 on reactor water level below +2". All Primary Containment Isolations System groups that received an actuation signal performed as designed. Additionally, all other systems functioned as designed.

"This event is reportable within 4 hours per 10CFR50.72(b)(2)(iv)(B) - Any event or condition that results in actuation of the reactor protection system (RPS) when the reactor is critical except when the actuation results from and is part of a pre-planned sequence during testing or reactor operation.

"This event also requires an 8 hour report per 10CFR 50.72(b)(3)(iv)(A), "Any event or condition that results in valid actuation of any of the systems listed in paragraph (b)(3)(iv)(B), (1) Reactor protection system (RPS) including: reactor scram or reactor trip, except when the actuation results from and is part of a pre-planned sequence during testing or reactor operation and (2) General containment isolation signals affecting containment isolation valves in more than one system or multiple main steam isolation valves (MSIVs).

"The NRC Resident Inspector has been notified."

All control rods fully inserted and decay heat is being removed via normal feedwater and condenser.

Page Last Reviewed/Updated Thursday, March 25, 2021