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Event Notification Report for October 02, 2019

U.S. Nuclear Regulatory Commission
Operations Center

Event Reports For
10/1/2019 - 10/2/2019

** EVENT NUMBERS **


54290 54302

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Agreement State Event Number: 54290
Rep Org: CALIFORNIA RADIATION CONTROL PRGM
Licensee: CONSTRUCTION TESTING SERVICES, INC.
Region: 4
City: ROCKLIN   State: CA
County:
License #: 8043-34
Agreement: Y
Docket:
NRC Notified By: K. ARUNIKA HEWADIKARAM
HQ OPS Officer: OSSY FONT
Notification Date: 09/23/2019
Notification Time: 15:31 [ET]
Event Date: 09/20/2019
Event Time: 00:00 [PDT]
Last Update Date: 09/23/2019
Emergency Class: NON EMERGENCY
10 CFR Section:
AGREEMENT STATE
Person (Organization):
VINCENT GADDY (R4DO)
NMSS_EVENTS_NOTIFICATION (EMAIL)
- CNSNS (MEXICO) (EMAIL)
ILTAB (EMAIL)
This material event contains a "Less than Cat 3" level of radioactive material.

Event Text

AGREEMENT STATE REPORT - STOLEN MOISTURE DENSITY GAUGE

The following was received from the California Department of Public Health - Radiologic Health Branch (RHB) via email:

"On 09/21/19, (Saturday), the RSO [radiation safety officer] contacted RHB and left a voicemail message to report a stolen moisture density gauge. The gauge involved is a Troxler Model 3440, S/N 28050 containing 9 mCi of Cs-137 and 44 mCi of Am-241. The gauge was stolen on 09/20/2019, between the hours of 2030 PDT and 0130 PDT, while it was charging at the user's residence. Union City Police was notified of the incident (Case # 190921007, Officer # 4740, Sarah Lings). Licensee will be posting a reward for the safe return of the gauge.

"Licensee failed to contact CA Office of Emergency Services (OES) regarding immediate notification. RHB will be following up on the incident."

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

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Power Reactor Event Number: 54302
Facility: BROWNS FERRY
Region: 2     State: AL
Unit: [] [2] []
RX Type: [1] GE-4,[2] GE-4,[3] GE-4
NRC Notified By: MATTHEW SLOUKA
HQ OPS Officer: DONALD NORWOOD
Notification Date: 10/01/2019
Notification Time: 07:05 [ET]
Event Date: 10/01/2019
Event Time: 03:07 [CDT]
Last Update Date: 10/01/2019
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):
BINOY DESAI (R2DO)
Unit SCRAM Code RX Crit Initial PWR Initial RX Mode Current PWR Current RX Mode
2 A/R Y 0 Startup 0 Hot Shutdown

Event Text

AUTOMATIC REACTOR SCRAM DURING REACTOR STARTUP

"On 10/1/2019, at 0307 CDT, Unit 2 was conducting a normal reactor startup and received a valid Reactor Protection System (RPS) scram. The reactor was critical in MODE 2 at the Point of Adding Heat. Operators began withdrawing Source Range Monitor (SRM) Instrumentation per procedure. When the operator depressed the SRM Drive Out pushbutton to withdraw the last two SRMs (C and D), an unexpected full Reactor Scram was received. Annunciator indication in the Main Control Room indicated a Neutron Monitoring Scram. The Intermediate Range Monitors (IRM) D, E, F, H and G all indicated Upscale High High. There were no Emergency Core Cooling System (ECCS) or Containment Isolation System actuations. All other systems functioned as designed.

"The cause of the Reactor Scram is still under investigation.

"This event requires a 4-hour report per 10 CFR 50.72(b)(2)(iv)(B), 'Any event or condition that results in actuation of the reactor protection system (RPS) when the reactor is critical except when the actuation results from and is part of a pre-planned sequence during testing or reactor operation.'

"This event also requires an 8-hour report per 10 CFR 50.72(b)(3)(iv)(A), 'Any event or condition that results in valid actuation of any of the systems listed in paragraph (b)(3)(iv)(B), (1) Reactor protection system (RPS) including: reactor scram or reactor trip, except when the actuation results from and is part of a pre-planned sequence during testing or reactor operation.'

"The NRC Resident Inspector has been notified."


Page Last Reviewed/Updated Wednesday, October 02, 2019
Wednesday, October 02, 2019