Event Notification Report for April 20, 2020
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
04/19/2020 - 04/20/2020
Part 21
Event Number: 54674
Rep Org: CURTISS WRIGHT FLOW CONTROL CO.
Licensee: CURTISS WRIGHT FLOW CONTROL CO.
Region: 4
City: IDAHO FALLS State: ID
County:
License #:
Agreement: N
Docket:
NRC Notified By: BART HUMBLE
HQ OPS Officer: OSSY FONT
Licensee: CURTISS WRIGHT FLOW CONTROL CO.
Region: 4
City: IDAHO FALLS State: ID
County:
License #:
Agreement: N
Docket:
NRC Notified By: BART HUMBLE
HQ OPS Officer: OSSY FONT
Notification Date: 04/21/2020
Notification Time: 17:18 [ET]
Event Date: 04/20/2020
Event Time: 00:00 [MDT]
Last Update Date: 04/21/2020
Notification Time: 17:18 [ET]
Event Date: 04/20/2020
Event Time: 00:00 [MDT]
Last Update Date: 04/21/2020
Emergency Class:
10 CFR Section:
21.21(d)(3)(i) - Defects And Noncompliance
10 CFR Section:
21.21(d)(3)(i) - Defects And Noncompliance
Person (Organization):
FRANK ARNER (R1DO)
- PART 21/50.55 REACTORS (EMAIL)
FRANK ARNER (R1DO)
- PART 21/50.55 REACTORS (EMAIL)
PART 21 REPORT - DEFECT IN THERMOCOUPLE LOW LEVEL AMPLIFIER MODULES
The following is a summary of information received from Curtiss-Wright, Nuclear Division:
Three RTL modules [thermocouple low level amplifiers] have been delivered to clients that may have included faulty resistors that could have remained undetected during functional testing and will eventually malfunction with time in service.
MAY/MCY resistors are precision, low temperature coefficient, metal foil technology resistors used in circuits where stability with time and temperature is required. The RTL module uses this style of resistor to achieve its accuracy and variable temperature effects specifications. The symptoms exhibited by faulty resistors were open circuit or changes in value in response to physical or thermal stress. Faulty resistors were sent to the manufacturer for failure analysis. Cracks were discovered in the bond wires that connected the resistor leads to the resistor chip inside the resistor package.
The failure rate of resistors manufactured in 2017 and 2018 was significantly greater than resistors manufactured in earlier years. A search of the build records during that time interval resulted in three units. These three modules contain 10 kilo-ohm resistors with date codes from 2017. There are two 10 kilo-ohm resistors in an RTL module, R8 and R17, on the main circuit board assembly. Configured for an RTD input, only R8 is active. R8 sets the 1 milli-ampere excitation current for the RTD element. R17 is used in a voltage offset circuit that is only used in thermocouple and low level amplifier configurations.
If the module has been in service for any significant amount of time with no problems, 12 weeks or more, then it is probable that R8, the only suspect resistor in the default configuration, is not affected by this phenomenon. However, if the module has not seen significant service, then the module should be considered suspect. Additionally, if the module has been or could in the future be reconfigured to a low level amplifier or thermocouple application, then the same situation exists with R17, which is not used in the default configuration.
Affected Plant - Part Number (Serial Numbers):
Beaver Valley - NUS-A135PA-1/3 (s/n: 1800083)
Indian Point 3 - NUS-A138PA-3/13/W (s/n: 1800334)
Ginna - NUS-A138PA-1/4 (s/n: 1800666)
Contact Scientech-I&C-Repair@curtisswright.com to return these modules for further testing and rework, if necessary.
Should you have any questions regarding this matter, please contact:
Shanen Onken
Scientech Business Segment Manager
Curtiss-Wright Nuclear Division
sonken@curtisswright.com
Tel 208-497-3410, Cell 208-821-4054
The following is a summary of information received from Curtiss-Wright, Nuclear Division:
Three RTL modules [thermocouple low level amplifiers] have been delivered to clients that may have included faulty resistors that could have remained undetected during functional testing and will eventually malfunction with time in service.
MAY/MCY resistors are precision, low temperature coefficient, metal foil technology resistors used in circuits where stability with time and temperature is required. The RTL module uses this style of resistor to achieve its accuracy and variable temperature effects specifications. The symptoms exhibited by faulty resistors were open circuit or changes in value in response to physical or thermal stress. Faulty resistors were sent to the manufacturer for failure analysis. Cracks were discovered in the bond wires that connected the resistor leads to the resistor chip inside the resistor package.
The failure rate of resistors manufactured in 2017 and 2018 was significantly greater than resistors manufactured in earlier years. A search of the build records during that time interval resulted in three units. These three modules contain 10 kilo-ohm resistors with date codes from 2017. There are two 10 kilo-ohm resistors in an RTL module, R8 and R17, on the main circuit board assembly. Configured for an RTD input, only R8 is active. R8 sets the 1 milli-ampere excitation current for the RTD element. R17 is used in a voltage offset circuit that is only used in thermocouple and low level amplifier configurations.
If the module has been in service for any significant amount of time with no problems, 12 weeks or more, then it is probable that R8, the only suspect resistor in the default configuration, is not affected by this phenomenon. However, if the module has not seen significant service, then the module should be considered suspect. Additionally, if the module has been or could in the future be reconfigured to a low level amplifier or thermocouple application, then the same situation exists with R17, which is not used in the default configuration.
Affected Plant - Part Number (Serial Numbers):
Beaver Valley - NUS-A135PA-1/3 (s/n: 1800083)
Indian Point 3 - NUS-A138PA-3/13/W (s/n: 1800334)
Ginna - NUS-A138PA-1/4 (s/n: 1800666)
Contact Scientech-I&C-Repair@curtisswright.com to return these modules for further testing and rework, if necessary.
Should you have any questions regarding this matter, please contact:
Shanen Onken
Scientech Business Segment Manager
Curtiss-Wright Nuclear Division
sonken@curtisswright.com
Tel 208-497-3410, Cell 208-821-4054
Agreement State
Event Number: 54684
Rep Org: FLORIDA BUREAU OF RADIATION CONTROL
Licensee: REPUBLIC SERVICES NORTH FLORIDA RECYCLING CENTER
Region: 1
City: JACKSONVILLE State: FL
County:
License #: N/A
Agreement: Y
Docket:
NRC Notified By: MATTHEW SENISON
HQ OPS Officer: HOWIE CROUCH
Licensee: REPUBLIC SERVICES NORTH FLORIDA RECYCLING CENTER
Region: 1
City: JACKSONVILLE State: FL
County:
License #: N/A
Agreement: Y
Docket:
NRC Notified By: MATTHEW SENISON
HQ OPS Officer: HOWIE CROUCH
Notification Date: 04/30/2020
Notification Time: 15:37 [ET]
Event Date: 04/20/2020
Event Time: 00:00 [EDT]
Last Update Date: 04/30/2020
Notification Time: 15:37 [ET]
Event Date: 04/20/2020
Event Time: 00:00 [EDT]
Last Update Date: 04/30/2020
Emergency Class: Non Emergency
10 CFR Section:
Agreement State
10 CFR Section:
Agreement State
Person (Organization):
DAN SCHROEDER (R1DO)
NMSS_EVENTS_NOTIFICATION (EMAIL)
DAN SCHROEDER (R1DO)
NMSS_EVENTS_NOTIFICATION (EMAIL)
AGREEMENT STATE REPORT - USED BEVERAGE CAN (UBC) BALED ALUMINUM RETURNED TO FLORIDA
The following information was received from the state of Florida via email:
"The state of Kentucky Radiation Health [Branch] faxed a report of rejection of an UBC [used beverage can) bale from Logan Aluminum of KY, originating from Republic Services of Jacksonville, FL. The radiation measurement was 1200 cps (also reported as 0.7 mR/hr.) midway of the enclosed trailer. Background measured 121 cps.
"DOT-SP 10656 KY-FL-20-001 was issued. Per [an employee] of Republic Services, this load was comprised of household curbside waste, and 'people put whatever they want in there.' Only one bale was higher than background. The rest of load successfully resubmitted.
"Update: This bale was returned to Florida for investigation, whereupon [the Radiation Safety Officer at Republic Services] reached out to the [Headquarters Operations Officer at the Nuclear Regulatory Commission], who transferred him to the BRC [Florida Bureau of Radiation Control]."
Florida BRC will be conducting a follow-up investigation.
Florida Incident Number: FL20-051
The following information was received from the state of Florida via email:
"The state of Kentucky Radiation Health [Branch] faxed a report of rejection of an UBC [used beverage can) bale from Logan Aluminum of KY, originating from Republic Services of Jacksonville, FL. The radiation measurement was 1200 cps (also reported as 0.7 mR/hr.) midway of the enclosed trailer. Background measured 121 cps.
"DOT-SP 10656 KY-FL-20-001 was issued. Per [an employee] of Republic Services, this load was comprised of household curbside waste, and 'people put whatever they want in there.' Only one bale was higher than background. The rest of load successfully resubmitted.
"Update: This bale was returned to Florida for investigation, whereupon [the Radiation Safety Officer at Republic Services] reached out to the [Headquarters Operations Officer at the Nuclear Regulatory Commission], who transferred him to the BRC [Florida Bureau of Radiation Control]."
Florida BRC will be conducting a follow-up investigation.
Florida Incident Number: FL20-051