Event Notification Report for July 26, 2016

STOLEN MOISTURE-DENSITY GAUGE

A moisture-density gauge (Troxler - Model 3440, Serial Number 34924) was stolen from a technician's vehicle. The vehicle trunk was broken into, the lockdown chains were cut, and the entire gauge was removed. This model Troxler typically contains 8 mCi Cesium-137 and 40 mCi Americium-241:Beryllium.

The licensee has notified local law enforcement and an investigation continues.


* * * UPDATE FROM JEFF SEMANCIK TO DONALD NORWOOD AT 1702 EDT ON 7/26/2016 * * *

The following is a synopsis of information received from the Connecticut Department of Energy and Environmental Protection, Radiation Division (CDEEPRD) via telephone:

At 1637 EDT, CDEEPRD received a call from the Connecticut State Police, informing them that the Troxler moisture-density gauge reported stolen this morning, had been located and recovered. It was reported that the gauge was recovered in an intact condition, outside its storage container.

Details of how the gauge was located are unknown at this time. Details concerning suspect(s) are unknown at this time.

CDEEPRD has an inspector en route to survey the gauge. If the gauge checks out as undamaged, it will be returned to the licensee at that time.

Notified R1DO (Welling). Notified via E-mail only - NMSS Events Notification and ILTAB.(Tucker).


* * * UPDATE FROM JEFF SEMANCIK TO DONALD NORWOOD AT 1813 EDT ON 7/26/2016 * * *

The following is a synopsis of information received from CDEEPRD via telephone:

An individual attempted to pawn the moisture-density gauge at a pawn shop in Bridgeport, CT. Pawn shop personnel immediately notified the Bridgeport Police Department. Officers arrived on the seen and arrested the individual who was attempting to pawn the gauge.

CDEEPRD performed a leak test on the moisture-density gauge. The gauge passed the leak test. The gauge was then turned over to licensee personnel. The moisture-density gauge was not in its storage box when brought into the pawn shop. The licensee placed the gauge in another storage box which they possessed.

Notified R1DO (Welling). Notified via E-mail only - NMSS Events Notification and ILTAB.(Tucker).


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

OFFSITE NOTIFICATION DUE TO OIL SHEEN IN COOLING TOWER BASIN

"On 7/26/2016 at 1536 EDT, TVA [Tennessee Valley Authority] notified the National Response Center that Watts Bar Nuclear Plant had noted an oil sheen on the Cooling Tower Basin. An oil sheen was observed within the U1 Cooling Tower basin at WBN. The sheen did not cover the entire Cooling Tower basin. The sheen covered approximately two square feet. Estimate of oil released into the Cooling Tower basin is less than four ounces. No oil sheen was visible in the Tennessee River from the bank above the diffuser pipes.

"Notifications were also made to TEMA [Tennessee Emergency Management Agency]. Follow-up observations within 20 minutes of the sheen being reported indicated that the oil sheen had dissipated and was no longer visible. Oil levels from the suspected source did not indicate any change in oil reservoir levels.

"Unit 1 remains in Mode 1 at 79 percent power - reduced power due to main condenser back pressure limits. Unit 2 remains in Mode 1 at 74 percent power - initial startup testing

"This event is reportable under 10 CFR 50.72(b)(2)(xi) as a condition that was reported to an outside Government Agency.

"The NRC Resident Inspector has been notified."

CONTROL ROOM EMERGENCY VENTILATION SYSTEM INOPERABLE

"On July 26, 2016 at 1252 hours (CDT), the Control Room Emergency Ventilation (CREV) system was declared inoperable due to a toxic gas analyzer spurious alarm which resulted in the 'B' Air Filtration Unit (AFU) being inadvertently isolated. In this condition, Control Room Emergency Ventilation (CREV) system cannot be guaranteed to achieve required design flow rate. Tech Spec 3.7.4, Condition A was entered which requires the CREV system to be restored to an operable status in seven (7) days.

"The CREV system maintains a habitable control room environment and ensures the operability of components in the control room emergency zone during accident conditions as well as protection of the operators from a high dose environment assumed during a design basis accident.

"This notification is being made in accordance with 10 CFR 50.72(b)(3)(v)(D), 'Event or Condition That Could Have Prevented Fulfillment of a Safety Function,' because the CREV system is a single train system required to mitigate the consequences of an accident.

"The NRC Resident Inspector has been notified."

AGREEMENT STATE REPORT - LOST IODINE-125 SOURCE

The following information was received via E-mail:

"At approximately 1300 MST on July 26, 2016, the licensee contacted the Agency [Arizona Radiation Regulatory Agency] and reported that a 0.4 millicurie Iodine-125 source, which was being used for localization, was discovered missing. An initial radiation survey of the department did not locate the source. The licensee does not know the exact date or time that the I-125 source went missing.

"The agency is continuing to investigate the event.

"The Governor's Office and NRC are being notified of this event."

Arizona First Notice Number: 16-013

Notified Mexico via E-mail.

* * * UPDATE AT 1540 EDT ON 8/16/16 FROM BRIAN GORETZKI TO JEFF HERRERA * * *

The following update was received from the Arizona Radiation Regulatory Agency via email:

"On August 12, 2016, the licensee notified the Agency [Arizona Radiation Regulatory Agency] that the initial notification was incorrect and that a 0.5 [micro Curie] Cs-137 button source had been lost and not an I-125 seed. The Administrative Director stated that he had assumed it was an I-125 seed because the lost source was from pathology but he did not clarify."

Notified R4DO (Proulx), NMSS (email), ILTAB (email), MEXICO(email).

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

AGREEMENT STATE REPORT - STOLEN CHECK SOURCES

The following was received from the State of California via email:

"On July 28, 2016, [the Radiation Safety Officer] RSO at CB&I contacted RHB [Radiologic Health Branch] to report an incident on stolen check sources from their storage location at Hunters Point in San Francisco, CA. Theft occurred in the afternoon of July 26, 2016, between approximately 1330-1400 hours, while CB&I personnel were conducting business in adjacent project trailers. Items stolen included tools, equipment and locked posted radioactive check source safe. No other radioactive materials were stored inside this trailer.

"Source description is as follows:
Source Date S/N Activity (uCi)
Th-230 Plate Jul-92 92TH1002842 0.0061
Th-230 Disk Nov-09 G4-791 0.01566
Tc-99 Disk Nov-09 G4-797 0.03111
Tc-99 Plate Nov-09 G4-788 0.01648
Cs-137 Button Jan-16 216 10
Cs-137 Button Aug-91 1065/91 9.9
Co-60 Metal Nut Unknown Unknown 0.624

"Note: (only Th-230, 0.01566 uCi exceeds 10X Appendix C value)"

CA 5010 Number: 072816

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