| U.S. Nuclear Regulatory Commission
Operations Center Event Reports For
06/01/2017 - 06/02/2017 ** EVENT NUMBERS ** |
 | Part 21 | Event Number: 52736 | Rep Org: AMETEK SOLID STATE CONTROLS
Licensee: AMETEK SOLID STATE CONTROLS
Region: 3
City: COLUMBUS State: OH
County:
License #:
Agreement: Y
Docket:
NRC Notified By: ETHAN SALSBURY
HQ OPS Officer: JEFF HERRERA | Notification Date: 05/08/2017
Notification Time: 09:52 [ET]
Event Date: 05/08/2017
Event Time: [EDT]
Last Update Date: 06/01/2017 | Emergency Class: NON EMERGENCY
10 CFR Section:
21.21(a)(2) - INTERIM EVAL OF DEVIATION
| Person (Organization):
JAMES DWYER (R1DO)
ROBERT ORLIKOWSKI (R3DO)
PART 21/50.55 REACTO (EMAI)
| Event Text PART 21 - INTERIM NOTIFICATION OF A POTENTIAL DEFECT ON A PRINTED CIRCUIT BOARD
"Ametek Solidstate Controls began a 10 CFR Part 21 evaluation after receiving notification from NextEra Energy Seabrook Station that a 7.5kVA Inverter would prematurely transfer to alternate source at 27A load during commissioning. The X202 Crest factor board (80-9213516-90) was replaced and the unit operated normally.
"Analysis of the failed X202 Crest Factor board identified an SCR on the printed circuit board was turning on prematurely and resulted in a transfer to alternate source or with the absence of the alternate source, to a dead bus. A capacitor was placed across the SCR on the X202 board to protect the SCR from dv/dt turn on. Subsequent testing determined the added capacitor corrected the anomaly.
"In addition to Seabrook, Ametek has recently experienced similar anomalies on two separate occasions. However, these occurrences were discovered during manufacturing and in-house testing phase for new product and were attributed to a SCR failure, excessive noise, and long leads.
"ACTION RECOMMENDED:
Ametek Solidstate Controls recommends installing a 0.22 microfarad capacitor p/n 80-134734-90 across X202 terminals J1-11 to J1-12. This capacitor will have no effect on EMI or seismic qualifications.
"If you wish to acquire the 80-134734-90 capacitor, Ametek Solidstate Controls will work with you to provide spare parts. 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"
* * *UPDATE FROM ETHAN SALSBURY TO VINCE KLCO ON 6/1/2017 AT 0750 EDT * * *
The following information was excerpted from an Ametek Solidstate Control email:
"Ametek Solidstate Controls began a 10 CFR Part 21 evaluation after receiving notification from NextEra Energy Seabrook Station that a 7.5kVA Inverter would prematurely transfer to alternate source at 27A load during commissioning. The X202 Crest factor board (80-9213516-90) was replaced and the unit operated normally.
"Analysis of the failed X202 Crest Factor board identified an SCR on the printed circuit board was turning on prematurely and resulted in a transfer to alternate source, or with the absence of the alternate source, to a dead bus. A capacitor was placed across the SCR on the X202 board to protect the SCR from dv/dt turn on. Subsequent testing determined the added capacitor corrected the anomaly.
"In addition to Seabrook, Ametek has recently experienced similar anomalies on two separate occasions. However, these occurrences were discovered during manufacturing and in-house testing phase for new product and were attributed to an SCR failure, excessive noise, and long leads.
"Ametek Solidstate Controls recommends installing a 0.22 microfarad capacitor, p/n 80-134734-90 across X202 terminals J1-11 to J1-12. This capacitor will have no effect on EMI, seismic, or aging qualifications.
"If you wish to acquire the 80-134734-90 capacitor, Ametek Solidstate Controls will work with you to provide spare parts. 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"
Notified R1DO (Bower), R3DO (Daley) and Part 21 Group via email. |
| Agreement State | Event Number: 52770 | Rep Org: TEXAS DEPT OF STATE HEALTH SERVICES
Licensee: HUMBOLDT SCIENTIFIC
Region: 1
City: RALEIGH State: NC
County:
License #: UNKNOWN
Agreement: Y
Docket:
NRC Notified By: ARTHUR TUCKER
HQ OPS Officer: VINCE KLCO | Notification Date: 05/24/2017
Notification Time: 12:20 [ET]
Event Date: 05/24/2017
Event Time: 10:52 [EDT]
Last Update Date: 05/24/2017 | Emergency Class: NON EMERGENCY
10 CFR Section:
AGREEMENT STATE
| Person (Organization):
CHRISTOPHER CAHILL (R1DO)
JEREMY GROOM (R4DO)
NMSS_EVENTS_NOTIFICA (EMAI)
ILTAB (EMAI)
|
| This material event contains a "Less than Cat 3 " level of radioactive material. | Event Text AGREEMENT STATE REPORT - FOUND MOISTURE DENSITY GAUGE
The following information was received from the State of Texas by email:
"On October 16, 1998, the Agency [Texas Department of State Health Services] was notified that a Humboldt model 5001 moisture/density gauge containing a 10 millicurie cesium - 137 and a 40 millicurie americium - 241 source was lost during transport from San Antonio to Laredo, Texas. The gauge was to be delivered to the Texas Department of Transportation (TXDOT). A search of the transportation companies warehouses and delivery locations along the transportation route did not find the gauge. The investigation was placed in "Inactive" status. On May 17, 2017, the Agency received an email string showing that a moisture/density gauge was for sale on the internet site 'eBay'. A search of the eBay site found that the gauge serial number matched the serial number of the gauge reported missing in 1998. The Federal Bureau of Investigation (FBI) was contacted and a request was made for assistance in gathering information on the seller. Using the information gathered by the Agency and the FBI, the Agency was able to contact the seller. The seller removed the posting off of eBay immediately. The seller stated they purchase materials from companies who are going out of business and resell them. The seller stated they did not remember when or where the gauge was purchased. The seller stated they had just moved all the materials they store in a large warehouse into two smaller warehouses and that is when they discovered the gauge. They did some research on the use for the gauge online and decided to sell it. The seller turned the gauge over to TXDOT on May 24, 2017. Dose rates taken on the gauge by TXDOT were normal. The gauge will be leak tested and returned to the manufacturer. Additional information will be provided as it is received in accordance with SA-300."
Event #35040 initially reported the event on 11/16/1998 as a lost source while in transit.
Texas Incident: I-7394
THIS MATERIAL EVENT CONTAINS A "LESS THAN CAT 3" LEVEL OF RADIOACTIVE MATERIAL
Sources that are "Less than IAEA Category 3 sources," are either sources that are very unlikely to cause permanent injury to individuals or contain a very small amount of radioactive material that would not cause any permanent injury. Some of these sources, such as moisture density gauges or thickness gauges that are Category 4, the amount of unshielded radioactive material, if not safely managed or securely protected, could possibly - although it is unlikely - temporarily injure someone who handled it or were otherwise in contact with it, or who were close to it for a period of many weeks. For additional information go to http://www-pub.iaea.org/MTCD/publications/PDF/Pub1227_web.pdf |
| Power Reactor | Event Number: 52781 | Facility: MONTICELLO
Region: 3 State: MN
Unit: [1] [ ] [ ]
RX Type: [1] GE-3
NRC Notified By: KIRK DUEA
HQ OPS Officer: DONG HWA PARK | Notification Date: 06/01/2017
Notification Time: 23:41 [ET]
Event Date: 06/01/2017
Event Time: 16:45 [CDT]
Last Update Date: 06/01/2017 | Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(3)(xiii) - LOSS COMM/ASMT/RESPONSE
| Person (Organization):
ROBERT DALEY (R3DO)
|
| Unit | SCRAM Code | RX CRIT | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode | | 1 | N | Y | 100 | Power Operation | 100 | Power Operation | Event Text LOST ABILITY TO RECEIVE METEOROGIC DATA
"Planned maintenance to restore normal power to Plant Computer Systems resulted in an unexpected loss of all Meteorological (MET) Tower Data [at 1645 CDT]. As a result, this represents a Loss of Emergency Assessment Capability and is reportable under 10CFR 50.72 (b)(3)(xiii). The isolation was restored and MET Tower Data was restored at 1845. The health and safety of the public was not affected as the plant is operating in a normal condition with no severe weather or storms in the area. Additionally meteorological data was available from the National Weather Service should this data had been necessary.
"The NRC Resident Inspector has been notified."
The licensee will be notifying the State of Minnesota. | |