Event Notification Report for April 23, 2015

AGREEMENT STATE REPORT - FIXED GAUGE SHUTTER STUCK OPEN

The following report was received via fax:

"TDEC [Tennessee Department of Environment and Conservation] was notified on 4/24/2015 by [the licensee's] Radiation Safety Officer that during the performance of a 6-month shutter check on a Vega Model SHGL-1 gauge, the shutter was found to be inoperable and couldn't be moved to the closed position. The isotope involved was 30 mCi of Cs-137 (sealed source) contained in a Vega Model SHLG-1 level gauge, S/N OV0604. No radiation exposure occurred as a result of the incident. Current levels at the gauge are the same as dose rates under normal operating conditions."

Tennessee Event: TN-15-071

VIOLATION OF THE FITNESS FOR DUTY PROGRAM

A contract employee supervisor tested positive for a follow-up fitness-for-duty test. The employees access to the site has been denied.

The licensee has notified the NRC Resident Inspector.

MANUAL REACTOR TRIP DUE TO A SECONDARY PLANT TRANSIENT

"On April 23, 2015 DC Cook Unit 2 Reactor was manually tripped due to an uncontrolled cooldown due to two (2) failed open steam dump valves. The cause of the failure is still under investigation.

"This event is reportable under 10 CFR 50.72(b)(2)(i) Tech Spec Required Shutdown, as a four (4) hour report; 10 CFR 50.72(b)(2)(iv)(B), Reactor Protection System (RPS) actuation, as a four (4) hour report; and under 10 CFR 50.72(b)(3)(iv)(A), specified system actuation of the Reactor Protection System (RPS), as an eight (8) hour report.

"The electrical grid is stable and Unit 2 continues to be supplied by offsite power. All control rods fully inserted. Decay heat is being removed via steam generator Power Operated Relief Valves due to steam dump valves being manually isolated. Preliminary evaluation indicates all plant systems functioned normally following the Reactor Trip. DC Cook Unit 2 remains stable in Mode 3 while conducting the post Trip Review. No radioactive release is in progress as a result of this event.

"The DC Cook Resident NRC Inspector has been notified."

There is no indication of primary to secondary leakage and there is no impact on Unit 1.

SAFETY SYSTEMS DECLARED INOPERABLE DUE TO EQUIPMENT MALFUNCTION

"At 1050 [CDT] on 4/23/2015, an equipment malfunction resulted in DAEC [Duane Arnold Energy Center] declaring the Division 1 Essential Electrical Bus inoperable. The LPCI [ Low Pressure Coolant Injection] system was inoperable but available as part of a planned evolution at the time of the malfunction. Declaring the Essential Electrical Bus inoperable caused the 'A' Core Spray System to be considered inoperable. LPCI and 'A' Core Spray being inoperable simultaneously constituted a loss of safety function. The 'B' Core Spray system remained operable and available. The equipment malfunction was resolved promptly, allowing the Division 1 Essential Electrical Bus to be returned to an operable status.

"The notification is being made pursuant to 10 CFR 50.72(b)(3)(v)(D).

"The [NRC] Resident Inspector has been notified."

The licensee entered and exited TS LCO 3.5.1 condition B.


* * * RETRACTION FROM BOB MURRELL TO DONALD NORWOOD AT 0835 EDT ON 5/8/2015 * * *

"The purpose of this notification is to retract a previous report made on 4/23/15 at 1851 EDT (EN 51006). Notification to the NRC was initially made as a result of an event or condition that could prevent the fulfillment of the safety function of Emergency Core Cooling System (ECCS) due to an equipment malfunction associated with the Division 1 Essential Electrical Bus Breaker 1A306.

"Subsequent to the initial report, NextEra Energy Duane Arnold (NextEra) has determined that the Division 1 Essential Electrical Bus was fully capable of performing its intended safety function with the malfunction on Bus Breaker 1A306.

"Therefore, this event is not considered a Safety System Functional Failure and is not reportable to the NRC as a Licensee Event Report (LER) per 10 CFR 50.73.

"The NRC Resident Inspector has been notified."

Notified R3DO (Skokowski).

AGREEMENT STATE REPORT - LOST MOISTURE DENSITY GAUGE

The following information was provided by the State of Texas via email:

"On April 23, 2015, at 2117 [CDT], the Agency [Texas Department of State Health Services] was contacted by the licensee's radiation safety officer (RSO) and informed that one of their InstroTek model 3500 moisture/density gauges containing an 8 millicurie cesium - 137 source and a 40 millicurie americium/beryllium source was lost by a technician at a work site [Midland, Texas]. The technician had placed the gauge on the back of his pickup truck. He walked around the job site with the work area supervisor for a few minutes, then returned to his truck and drove to the new work site. When he arrived at the new site he notice the gauge was missing. The technician notified the RSO and local law enforcement. He then began looking for the gauge. The RSO stated he was responding to the location to help look for the gauge. The RSO stated the operating rod for the cesium source was locked in the shielded position. Additional information will be provided as it is received in accordance with SA-300."

Texas Incident #: I-9307

* * * UPDATE ON 4/24/15 AT 1508 EDT FROM ART TUCKER TO DONG PARK * * *

The following information was provided by the State of Texas via email:

"On April 24, 2015, at 0929 CDT the Agency [Texas Department of State Health Services] was notified by the licensee's radiation safety officer (RSO) that the gauge had been recovered. The RSO stated they had been contacted by a contractor who had found the gauge yesterday and taken it to their [location] where they stored it over night. The RSO stated the operating handle for the cesium source was still locked. The gauge did not appear to be damaged. The RSO stated a leak test was performed of the gauge sources and the gauge has been placed in storage until the results of the leak test are received. Additional information will be provided as it is received in accordance with SA-300."

Notified R4DO (Drake), NMSS Events Notifications, ILTAB, and Mexico via 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

OFFSITE NOTIFICATION DUE TO WORKER FATALITY NOT RELATED TO PLANT OPERATION

"This notification is being reported to NRC in accordance with 10 CFR 50.72(b)(2)(xi) for notification of an on-site fatality of a contract employee. In addition, the contracting company plans to notify the Occupational Safety and Health Administration (OSHA) of a fatality per 29 CFR 1904.39.

"At approximately 1717 CDT on 4/23/15, a 911 call was received in the Control Room regarding a contract employee who was found unresponsive and unattended in a temporary break room set up on the Turbine Deck during the Unit 1 refueling outage. Resuscitation by first responders and paramedics from a nearby town was unsuccessful. Resuscitation efforts were suspended at 1750.

"The Houston County Sheriff's Office was notified at approximately 1800 and they responded to the site at 1822. The county coroner was notified and arrived on site at 1850.

"[Farley Nuclear Plant] received notification at approximately 2035 that the contractor company intended to notify OSHA.

"A press release is not planned at this time. The NRC Resident Inspector has been notified.

"Unit 1 remains in Mode 6 and Unit 2 remains in Mode 1 at 100% power."

AGREEMENT STATE REPORT - MISSING TROXLER MOISTURE DENSITY GAUGE

The following information was provided by the State of Texas via email:

"A representative of the licensee called [the Texas Department of State Health Services] and stated that two weeks ago a Troxler 3430 (sn 24971) had gone missing. He [the licensee] could not find it after calling his service companies and employees. He further said that the serial numbers for the sources are 75-3877 and 47-17874. He does not know what the activity of these sources is. He says that he will begin a written report. Further information will be provided in accordance with SA300 guidelines."

The licensee notified the Houston Police Department (report #0496748-15).

Texas Incident #: I-9312

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