Event Notification Report for May 01, 2018
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
04/30/2018 - 05/01/2018
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
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
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
10 CFR Section:
AGREEMENT STATE
Person (Organization):
MARK HAIRE (R4DO)
NMSS_EVENTS_NOTIFICATION (EMAIL)
MARK HAIRE (R4DO)
NMSS_EVENTS_NOTIFICATION (EMAIL)
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
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
Power Reactor
Event Number: 53374
Facility: GRAND GULF
Region: 4 State: MS
Unit: [1] [] []
RX Type: [1] GE-6
NRC Notified By: BRANDON STARNES
HQ OPS Officer: DONG HWA PARK
Region: 4 State: MS
Unit: [1] [] []
RX Type: [1] GE-6
NRC Notified By: BRANDON STARNES
HQ OPS Officer: DONG HWA PARK
Notification Date: 05/01/2018
Notification Time: 20:42 [ET]
Event Date: 05/01/2018
Event Time: 15:51 [CDT]
Last Update Date: 05/01/2018
Notification Time: 20:42 [ET]
Event Date: 05/01/2018
Event Time: 15:51 [CDT]
Last Update Date: 05/01/2018
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(2)(iv)(A) - ECCS INJECTION 50.72(b)(3)(iv)(A) - VALID SPECIF SYS ACTUATION 50.72(b)(3)(v)(B) - POT RHR INOP
10 CFR Section:
50.72(b)(2)(iv)(A) - ECCS INJECTION 50.72(b)(3)(iv)(A) - VALID SPECIF SYS ACTUATION 50.72(b)(3)(v)(B) - POT RHR INOP
Person (Organization):
RAY AZUA (R4DO)
RAY AZUA (R4DO)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 1 | N | N | 0 | Refueling | 0 | Refueling |
PLANT RECEIVED DIVISION ONE REACTOR PRESSURE VESSEL LEVEL 1 SIGNAL
"At 1551 hrs [CDT] on 5/1/2018, with the plant in Mode 5, a division one Reactor Pressure Vessel (RPV) Level 1 signal was received; however there was no actual change in RPV level. RPV Level remained at High Water Level supporting refuel operations. This caused an actuation of division one Load Shed and Sequencing system that shed and then re-energized the 15 bus. Division one diesel generator started from standby. Residual Heat Removal pump 'A', which was in shutdown cooling mode, was lost during the bus shed, and was re-sequenced upon re-energization of the 15 bus. Upon restoration of shutdown cooling, the RHR pump discharged into the RPV. RCS temperature increased approximately 5 degrees Fahrenheit as a result of the loss of shutdown cooling. The cause of the actuation signal is under investigation.
In accordance with NUREG 1022, Event Reporting Guidelines, this event is conservatively reported under 10 CFR 50.72(b)(2)(iv)(A) as an event that results in emergency core cooling system discharge into the RCS as a result of a valid signal, under 10 CFR 50.72(b)(3)(iv)(B)(8) as an event that results in the actuation of emergency ac electrical power systems, and under 10 CFR 50.72(b)(3)(v)(B) as an event or condition that at the time of discovery could have prevented the fulfillment of a safety function (remove residual heat)."
The licensee notified the NRC Resident Inspector.
"At 1551 hrs [CDT] on 5/1/2018, with the plant in Mode 5, a division one Reactor Pressure Vessel (RPV) Level 1 signal was received; however there was no actual change in RPV level. RPV Level remained at High Water Level supporting refuel operations. This caused an actuation of division one Load Shed and Sequencing system that shed and then re-energized the 15 bus. Division one diesel generator started from standby. Residual Heat Removal pump 'A', which was in shutdown cooling mode, was lost during the bus shed, and was re-sequenced upon re-energization of the 15 bus. Upon restoration of shutdown cooling, the RHR pump discharged into the RPV. RCS temperature increased approximately 5 degrees Fahrenheit as a result of the loss of shutdown cooling. The cause of the actuation signal is under investigation.
In accordance with NUREG 1022, Event Reporting Guidelines, this event is conservatively reported under 10 CFR 50.72(b)(2)(iv)(A) as an event that results in emergency core cooling system discharge into the RCS as a result of a valid signal, under 10 CFR 50.72(b)(3)(iv)(B)(8) as an event that results in the actuation of emergency ac electrical power systems, and under 10 CFR 50.72(b)(3)(v)(B) as an event or condition that at the time of discovery could have prevented the fulfillment of a safety function (remove residual heat)."
The licensee notified the NRC Resident Inspector.
Part 21
Event Number: 53529
Rep Org: AMETEK SOLIDSTATE CONTROLS
Licensee: AMETEK SOLIDSTATE CONTROLS
Region: 3
City: COLUMBUS State: OH
County:
License #:
Agreement: Y
Docket:
NRC Notified By: ETHAN SALSBURY
HQ OPS Officer: ANDREW WAUGH
Licensee: AMETEK SOLIDSTATE CONTROLS
Region: 3
City: COLUMBUS State: OH
County:
License #:
Agreement: Y
Docket:
NRC Notified By: ETHAN SALSBURY
HQ OPS Officer: ANDREW WAUGH
Notification Date: 07/27/2018
Notification Time: 16:14 [ET]
Event Date: 05/01/2018
Event Time: 00:00 [EDT]
Last Update Date: 07/27/2018
Notification Time: 16:14 [ET]
Event Date: 05/01/2018
Event Time: 00:00 [EDT]
Last Update Date: 07/27/2018
Emergency Class: NON EMERGENCY
10 CFR Section:
21.21(d)(3)(i) - DEFECTS AND NONCOMPLIANCE
10 CFR Section:
21.21(d)(3)(i) - DEFECTS AND NONCOMPLIANCE
Person (Organization):
SCOTT SHAEFFER (R2DO)
ANN MARIE STONE (R3DO)
HEATHER GEPFORD (R4DO)
PART 21/50.55 REACTORS (EMAIL)
SCOTT SHAEFFER (R2DO)
ANN MARIE STONE (R3DO)
HEATHER GEPFORD (R4DO)
PART 21/50.55 REACTORS (EMAIL)
PART 21 NOTIFICATION - POTENTIAL DEFECT IN AC VOLTAGE SENSE BOARD
"COMPONENT DESCRIPTION:
277VAC Voltage Sense Board.
"PROBLEM YOU COULD SEE:
In May of 2018, AMETEK Solidstate Controls (SCI) experienced failures during preventative maintenance with the 80-210833-90 AC Voltage Sense board during the startup of a unit. While the failures were experienced on commercial equipment, a version of the AC Voltage Sense printed circuit board is used in safety-related equipment as well.
"CAUSE:
The failure of the AC Voltage Sense Boards is caused by the opening of the 100 OHM 2W R7 metal oxide resistor, AMETEK SCI part number 03-804103-00, due to insufficient peak power withstand capability for the application. In all instances of failures experienced, the peak inrush power dissipation during startup caused the 2W metal oxide resistor to open. Failures have been limited to the metal oxide resistor.
"EFFECT ON SYSTEM PERFORMANCE:
If the 100 OHM, 2W metal oxide resistor in the R7 position (PN: 03-804103-00) of the AC Voltage Sense board experiences peak power above its rating and opens, the AC Voltage Sense board may fail. This failure could cause a false low AC voltage alarm and an inoperable high AC voltage alarm condition. During steady state operation, the resistor will not be exposed to power dissipation significant enough to impact the resistor.
"This potential defect and 10 CFR 21 notification applies to SCI safety-related 277VAC version of the AC Voltage Sense printed circuit board:
80-9210842-90 - PCB ASSY, VLT SENSE 277VAC, 1PH.
"ACTION RECOMMENDED:
The R7 metal oxide resistor is being replaced in the 80-9210842-90 version of the AC voltage sense printed circuit board with a wire-wound resistor (PN: 03-804103-10). The AC Voltage Sense Board will be revised to revision level 'I'. AMETEK recommends replacing any prior revisions of the 277VAC AC Voltage Sense boards at the earliest convenience.
"AMETEK SOLIDSTATE CONTROLS CORRECTIVE ACTION:
If you wish to replace the 277 VAC AC Voltage Sense Board with the latest revision, AMETEK Solidstate Controls will work with you to arrange replacements. Please contact Mr. Mark Shreve of our Client Services group at 1-800-222-9079 or 1-614-846-7500 ext. 6332. mark.shreve@AMETEK.com.
"AFFECTED CUSTOMERS
The list below identifies all AMETEK Solidstate Controls customers who have purchased the printed circuit board 80-9210842-90 since 2008. Any purchases prior to 2008 should have been replaced according to the recommended preventative maintenance schedule and, therefore are not applicable to this 10 CFR 21 notification."
China Nuclear, Edison Material Supply, Energy Northwest, Jade Dragon Trading, Korea Hydro & Nuclear Power Company Limited, KRSKO, Exelon Business Services - Braidwood Warehouse, Exelon Business Services - Braidwood/ Byron Generating Station, Georgia Power Company - Vogtle 1 & 2, Shenzhen Chance New Energy Scientific Instrument Co.
"COMPONENT DESCRIPTION:
277VAC Voltage Sense Board.
"PROBLEM YOU COULD SEE:
In May of 2018, AMETEK Solidstate Controls (SCI) experienced failures during preventative maintenance with the 80-210833-90 AC Voltage Sense board during the startup of a unit. While the failures were experienced on commercial equipment, a version of the AC Voltage Sense printed circuit board is used in safety-related equipment as well.
"CAUSE:
The failure of the AC Voltage Sense Boards is caused by the opening of the 100 OHM 2W R7 metal oxide resistor, AMETEK SCI part number 03-804103-00, due to insufficient peak power withstand capability for the application. In all instances of failures experienced, the peak inrush power dissipation during startup caused the 2W metal oxide resistor to open. Failures have been limited to the metal oxide resistor.
"EFFECT ON SYSTEM PERFORMANCE:
If the 100 OHM, 2W metal oxide resistor in the R7 position (PN: 03-804103-00) of the AC Voltage Sense board experiences peak power above its rating and opens, the AC Voltage Sense board may fail. This failure could cause a false low AC voltage alarm and an inoperable high AC voltage alarm condition. During steady state operation, the resistor will not be exposed to power dissipation significant enough to impact the resistor.
"This potential defect and 10 CFR 21 notification applies to SCI safety-related 277VAC version of the AC Voltage Sense printed circuit board:
80-9210842-90 - PCB ASSY, VLT SENSE 277VAC, 1PH.
"ACTION RECOMMENDED:
The R7 metal oxide resistor is being replaced in the 80-9210842-90 version of the AC voltage sense printed circuit board with a wire-wound resistor (PN: 03-804103-10). The AC Voltage Sense Board will be revised to revision level 'I'. AMETEK recommends replacing any prior revisions of the 277VAC AC Voltage Sense boards at the earliest convenience.
"AMETEK SOLIDSTATE CONTROLS CORRECTIVE ACTION:
If you wish to replace the 277 VAC AC Voltage Sense Board with the latest revision, AMETEK Solidstate Controls will work with you to arrange replacements. Please contact Mr. Mark Shreve of our Client Services group at 1-800-222-9079 or 1-614-846-7500 ext. 6332. mark.shreve@AMETEK.com.
"AFFECTED CUSTOMERS
The list below identifies all AMETEK Solidstate Controls customers who have purchased the printed circuit board 80-9210842-90 since 2008. Any purchases prior to 2008 should have been replaced according to the recommended preventative maintenance schedule and, therefore are not applicable to this 10 CFR 21 notification."
China Nuclear, Edison Material Supply, Energy Northwest, Jade Dragon Trading, Korea Hydro & Nuclear Power Company Limited, KRSKO, Exelon Business Services - Braidwood Warehouse, Exelon Business Services - Braidwood/ Byron Generating Station, Georgia Power Company - Vogtle 1 & 2, Shenzhen Chance New Energy Scientific Instrument Co.