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Event Notification Report for May 21, 2018

U.S. Nuclear Regulatory Commission
Operations Center

Event Reports For
5/18/2018 - 5/21/2018

** EVENT NUMBERS **


53397 53410 53413

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Agreement State Event Number: 53397
Rep Org: LOUISIANA RADIATION PROTECTION DIV
Licensee: EXXON MOBIL CHEMICAL CO.
Region: 4
City: BATON ROUGE   State: LA
County:
License #: LA-2349-L01, Amd.36
Agreement: Y
Docket:
NRC Notified By: JOE NOBLE
HQ OPS Officer: DONALD NORWOOD
Notification Date: 05/10/2018
Notification Time: 17:20 [ET]
Event Date: 05/01/2018
Event Time: 00:00 [CDT]
Last Update Date: 05/10/2018
Emergency Class: NON EMERGENCY
10 CFR Section:
AGREEMENT STATE
Person (Organization):
MARK HAIRE (R4DO)
NMSS_EVENTS_NOTIFICATION (EMAIL)

Event Text

AGREEMENT STATE REPORT - STUCK PROCESS GAUGE SHUTTER

The following is a synopsis of information received via E-mail:

On 5/9/2018, the Radiation Safety Officer (RSO) for ExxonMobil Chemical Co. (EMCo) reported a device failure to the Louisiana Department of Environmental Quality. On 5/1/2018 during routine annual maintenance and preventive maintenance checks it was discovered that a level density gauge had a shutter stuck in the open position.

The gauge was a Ronan Engineering Co. gauge, Model Number SA1-C5 loaded with 100 mCi Cs-137 (10/95). The device s/n is EE815. The source and source holder usually have one s/n for the whole device. A RONAN engineering sales and service company was contacted to fix the problem by repairing the gauge and the shutter to function properly. The gauge is installed on processes and does not pose a health and safety threat to the general public or the EMCo employees. The gauge will remain on the operational process until the repair is made to the device. A service order number was generated by EMCo for the device repair. The shutter was stuck in the open position due to the buildup of grime and corrosive material from the operational environment. This is considered an equipment failure for reporting requirements.

Louisiana Event Report ID No.: LA-180008

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Power Reactor Event Number: 53410
Facility: COLUMBIA GENERATING STATION
Region: 4     State: WA
Unit: [2] [] []
RX Type: [2] GE-5
NRC Notified By: SEAN KEEHN
HQ OPS Officer: STEVEN VITTO
Notification Date: 05/18/2018
Notification Time: 13:27 [ET]
Event Date: 05/18/2018
Event Time: 06:51 [PDT]
Last Update Date: 05/18/2018
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(2)(iv)(B) - RPS ACTUATION - CRITICAL
Person (Organization):
HEATHER GEPFORD (R4DO)
JEFFERY GRANT (IRD)
MICHAEL F. KING (NRR EO)
Unit SCRAM Code RX Crit Initial PWR Initial RX Mode Current PWR Current RX Mode
2 A/R Y 100 Power Operation 0 Hot Shutdown

Event Text

AUTOMATIC REACTOR SCRAM CAUSED BY MAIN TRANSFORMER TRIP

"At 0651 [PDT] on May 18th, 2018, Columbia Generating station experienced a Main Transformer trip, that caused a Reactor Scram. Reactor Power, Pressure and Level were maintained as expected for this condition. MS-RV-1A (Safety Relief Valve) and MS-RV-1B (Safety Relief Valve) opened on reactor high pressure during the initial transient. MS-RV-1B appeared to remain open after pressure lowered below the reset point. The operating crew removed power supply fuses for MS-RV-1B and it currently indicates intermediate position. SRV (Safety Relief Valve) tail pipe temperatures indicate all valves are closed. Suppression pool level and temperature have remained steady within normal operating levels.

"All control rods inserted and reactor power is being maintained subcritical.

"RPV (Reactor Pressure Vessel) water level is being maintained with condensate and feed system with startup flow control valves in automatic. Reactor Pressure is being maintained with the Turbine Bypass valves controlling in automatic. The main condenser is the heat sink.

"No ECCS (Emergency Core Cooling Systems) systems actuated or injected; the EOC-RPT (End of Cycle-Recirculation Pump Trip) and RPS (Reactor Protection System) systems actuated causing a trip of the RRC pumps and a reactor scram.

"Core recirculation is being maintained with RRC-P-1A (Reactor Recirculation Pump) running.

"No release has occurred.

"At this time there will be no notifications to state, local or other public agencies.

"The NRC Senior Resident has been notified.

"The cause of the event is currently under investigation. Plant conditions are stable."

The plant is in its normal electrical alignment and offsite power is available to the site.

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Power Reactor Event Number: 53413
Facility: BRUNSWICK
Region: 2     State: NC
Unit: [1] [2] []
RX Type: [1] GE-4,[2] GE-4
NRC Notified By: ALAN SCHULTZ
HQ OPS Officer: JEFF HERRERA
Notification Date: 05/21/2018
Notification Time: 10:41 [ET]
Event Date: 05/21/2018
Event Time: 00:00 [EDT]
Last Update Date: 05/21/2018
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(2)(xi) - OFFSITE NOTIFICATION
Person (Organization):
ANTHONY MASTERS (R2DO)
Unit SCRAM Code RX Crit Initial PWR Initial RX Mode Current PWR Current RX Mode
1 N Y 100 Power Operation 100 Power Operation
2 N N 0 0

Event Text

OFFSITE NOTIFICATION REGARDING MALFUNCTION OF EMERGENCY NOTIFICATION SIREN

"On May 21, 2018, at approximately 0840 Eastern Daylight Time (EDT), Duke Energy confirmed that one emergency notification siren (i.e., B13) located in Brunswick County was malfunctioning. The siren was making an abnormal sound, alternating between low and high pitch. The siren was deactivated upon confirmation of the siren malfunction. There are a total of 38 sirens located in Brunswick and New Hanover Counties. No other sirens were affected.

"Duke Energy notified the State of North Carolina, Brunswick County, New Hanover County and Coast Guard of the issue.

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


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Friday, May 03, 2019