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Event Notification Report for October 13, 2016

U.S. Nuclear Regulatory Commission
Operations Center

Event Reports For
10/12/2016 - 10/13/2016

** EVENT NUMBERS **


52277 52278 52295

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Agreement State Event Number: 52277
Rep Org: TENNESSEE DIV OF RAD HEALTH
Licensee: TOXCO
Region: 1
City: Oak Ridge State: TN
County:
License #: R-01037
Agreement: Y
Docket:
NRC Notified By: ANDREW HOLCOMB
HQ OPS Officer: BETHANY CECERE
Notification Date: 10/04/2016
Notification Time: 10:58 [ET]
Event Date: 09/29/2016
Event Time: 14:45 [EDT]
Last Update Date: 10/04/2016
Emergency Class: NON EMERGENCY
10 CFR Section:
AGREEMENT STATE
Person (Organization):
JON LILLIENDAHL (R1DO)
NMSS_EVENTS_NOTIFICA (EMAI)
ANGELA MCINTOSH (NMSS)
PATRICIA MILLIGAN (EMAI)

Event Text

AGREEMENT STATE REPORT - UNPLANNED CONTAMINATION EVENT

The following was received by fax from the Tennessee Division of Radiological Health:

"While emptying a 55 gallon drum of lead for reuse into a B-12 box, unknown and unsuspected contamination levels in bottom of drum resulted in a contamination of the area to max levels of 2,000,000 dpm/100 cm2 beta. Contamination levels in drum determined to be 2,000,000 dpm/100 cm2 max post event. Pre job surveys identified no elevated contamination levels in top of drum. Isotope and activity are unknown at this time. Isotope is a weak pure beta emitter. Analysis is underway for isotopic determination. [Three] 3 persons with skin contamination were deconned. Bioassays are underway for internal dose assessment. Area is being recovered, however, not within 24 hours resulting in reporting of event. Dose assessments are forthcoming."

State Event Report ID No.: TN-16-138

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Agreement State Event Number: 52278
Rep Org: LOUISIANA RADIATION PROTECTION DIV
Licensee: EXXON MOBIL
Region: 4
City: WALKER State: LA
County:
License #: LA-3462-L01
Agreement: Y
Docket:
NRC Notified By: RUSSELL CLARK
HQ OPS Officer: JEFF HERRERA
Notification Date: 10/04/2016
Notification Time: 16:57 [ET]
Event Date: 10/04/2016
Event Time: 09:10 [CDT]
Last Update Date: 10/04/2016
Emergency Class:
10 CFR Section:
AGREEMENT STATE
Person (Organization):
GREG WERNER (R4DO)
NMSS_EVENTS_NOTIFICA (EMAI)
PATRICIA MILLLIGAN (EMAI)
DAN COLLINS (NMSS)

Event Text

AGREEMENT STATE REPORT - POTENTIAL EXCESSIVE EXPOSURE OF RADIOGRAPHER

The following report was received from the Louisiana Department of Environmental Quality via facsimile:

"On October 4, 2016, at approximately 0910 CDT, the Radiation Safety Office of CB&I Walker LA, LLC notified LDEQ [Louisiana Department of Environmental Quality] of a potential excessive exposure to a radiographer working in the licensee's permanent radiographic facility. After making a proper radiation survey, the above radiographer moved his exposure device with 100.6 Ci of Ir-192 and then noticed the rear fitting had come loose from the crank-out control, which showed approximately three inches of drive cable exposed. The radiographer pushed the fitting forward and tightened it back into the connector of the crank-out control. The licensee believes that at this point the source was inadvertently pushed out of the front of the camera approximately three to four inches. The radiographer did not notice this at the time and continued setting up for the next exposure.

"Upon exiting the shooting cell, the radiographer observed the red revolving warning light. The radiographer also observed sounding of the shooting cell alarm upon his exiting the cell. The radiographer stated that he was inside the shooting cell for a period of between five to seven minutes. The radiographer read his direct reading pocket dosimeter and observed an off-scale reading. The radiographer immediately notified his RSO [Radiation Safety Officer], who immediately sent his whole body badge in for rush processing subsequent to the dosimetry processor being notified by the RSO. The RSO used the radiographer's information of occupancy time and his statement that he was standing while the exposure device was stationed on the shooting cell floor throughout the incident to estimate the radiographer's whole body exposure of between 5 and 25 R. The radiographer was then immediately sent to a local medical laboratory to have his blood drawn. There is no potential for off-site exposure. The licensee was advised by this inspector to contact the REAC/TS facility for guidance on blood chromosomal analysis. This is a preliminary report in an on-going investigation."

Louisiana Event Report ID No.: LA160010

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Power Reactor Event Number: 52295
Facility: BYRON
Region: 3 State: IL
Unit: [ ] [2] [ ]
RX Type: [1] W-4-LP,[2] W-4-LP
NRC Notified By: JIM LYNDE
HQ OPS Officer: HOWIE CROUCH
Notification Date: 10/12/2016
Notification Time: 15:17 [ET]
Event Date: 10/12/2016
Event Time: 13:38 [CDT]
Last Update Date: 10/12/2016
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):
RICHARD SKOKOWSKI (R3DO)

Unit SCRAM Code RX CRIT Initial PWR Initial RX Mode Current PWR Current RX Mode
2 M/R Y 90 Power Operation 0 Hot Standby

Event Text

MANUAL REACTOR TRIP DUE TO SPURIOUS FEEDWATER ISOLATION

"At 1338 CDT, a spurious electrical fault on a unit substation motor control center caused a spurious feedwater isolation and required a manual reactor trip on Unit 2 Byron Station due to lowering steam generator level. Auxiliary feedwater automatically actuated to supply feedwater flow and is maintaining steam generator level within procedurally required levels."

The motor control center fault resulted in feedwater isolations on two of four steam generators. All rods inserted during the trip. Decay heat is being removed via the steam dumps to condenser. Plant response to the trip was uncomplicated. Unit 2 is in a normal shutdown electrical lineup with power available from offsite. The grid is stable. Byron Station Unit 1 is at 95% power and stable and was unaffected by the transient on Unit 2. The cause of the motor control center fault is under investigation.

The licensee has notified the NRC Resident Inspector and will be issuing a press release concerning the manual reactor trip.

Page Last Reviewed/Updated Thursday, October 13, 2016
Thursday, October 13, 2016