Event Notification Report for June 03, 2014

HIGH RANGE STACK MONITOR TAKEN OUT OF SERVICE FOR PLANNED MAINTENANCE

At 0933 EDT, Millstone Station Unit 2 removed the Stack High Range Radiation Monitor RM-8168 from service for planned maintenance. Maintenance and testing were completed and the Stack Radiation Monitor returned to service at 1252 EDT.

The licensee informed both State and local agencies and the NRC Resident Inspector.

WATTS BAR UNIT 2 POTENTIALLY DEFECTIVE FUSES INSTALLED

"WBN [Watts Bar Nuclear] Unit 2 (under construction) determined that Littelfuse Part Number FLAS005.T fuses manufactured under three date codes are potentially susceptible to nuisance opening according to Littelfuse letter dated April 30, 2014. Littelfuse Part Number FLAS005.T fuses are commercial grade and dedicated by TVA for use as a basic component in safety related systems. No confirmed examples have been identified that would have created a substantial safety hazard at this time. The potentially defective fuses were purchased for WBN Unit 2 and have been installed on WBN Unit 2 only. No potentially defective fuses have been installed on WBN Unit 1, SQN [Sequoyah] Units 1 or 2, or BFN [Browns Ferry Nuclear] Units 1, 2, or 3. At this time, there is no safety significance because fuel has not been loaded on WBN Unit 2. Installed and potentially defective Part Number FLAS005.T fuses will be replaced prior to obtaining a WBN Unit 2 Operating License. This issue has been documented in TVA's corrective action program as Problem Evaluation Report 878252 and is being conservatively reported by WBN Unit 2 under 10 CFR 50.55(e)."

The licensee has notified the NRC Resident Inspector.

AGREEMENT STATE REPORT - LOST AND FOUND TROXLER MOISTURE DENSITY GAUGE

A Troxler Model 3430 (8 mCi Cs-137 and 40 mCi Am-241:Be) fell off the back of the truck when the licensee was leaving the construction site. The gauge was discovered just outside the site by a landscaper who contacted the personnel at the construction site.

The licensee was contacted by construction personnel. The licensee returned to the site and took custody of the gauge. It was out of his control for approximately 30 to 45 minutes.

Florida Incident #: 14-049

HIGH AND LOW RANGE VENTILATION PROCESS RADIATION MONITOR PRE-PLANNED MAINTENANCE

At 1259 EDT, Millstone Station Unit 3 removed the High and Low Range Ventilation Process Radiation Monitors from service for planned maintenance. The radiation monitor is expected to be out of service for approximately less than 24 hours. Compensatory measures are in place.

The licensee informed both State and local agencies and the NRC Resident Inspector.

OFFSITE NOTIFICATION DUE TO SPILL OF TREATED DOMESTIC WATER

"At approximately 4:50 PM EDT on June 3, 2014 Duke Energy personnel notified the North Carolina Department of Environment and Natural Resources of a spill of treated domestic waste water. The waste water was released through a valve onto the surrounding ground and may have entered the plant's storm drain system. The release has been stopped. An investigation is in progress to determine the cause and additional corrective actions.

"There is no impact to public health and safety or the environment due to this incident.

"This event is reportable per 10 CFR 50.72(b)(2)(xi), an event related to protection of the environment for which a notification to other government agencies has been made.

"The NRC Resident Inspector has been notified."

The gray water was dripping from a valve onto the ground. The total quantity of the seepage is unknown.

DIESEL GENERATORS DECLARED INOPERABLE DUE TO NOT MEETING HIGH ENERGY LINE BREAK REQUIREMENTS

"D1 and D2 Emergency Diesel Generators (DG) were declared inoperable at 1902 CDT due to the station identifying that the Turbine Building HELB [High Energy Line Break] heatup analysis temperature of 270 F exceeded the maximum temperature limit of 200 F for both diesel generators supply and exhaust fan blade positioners.

"LCO 3.8.1 Condition B was entered for both DGs and LCO 3.8.1 Condition E was entered for two DGs inoperable on the same unit. The DGs could start and run if required at the time of entry.

"This condition is reportable per 10 CFR 50.72(b)(3)(v) as an event or condition that could have prevented the fulfillment of a safety function.

"Unit 1 continued to operate in Mode 1 at 100% power while bypasses were being put in-service to fail the diesel generators supply and exhaust fan blade positioners in the full cooling mode to allow the LCO conditions to be exited.

"At 2002 CDT the bypasses were installed on the D1 Diesel Generator Supply and Exhaust Fan Blade Positioners therefore LCO 3.8.1 Condition E was exited for both D1 and D2 Emergency Diesel Generators being inoperable. In addition LCO 3.8.1 Condition B was exited for D1 Diesel Generator due to it being declared Operable.

"At 2056 CDT the bypasses were installed on the D2 Diesel Generator Supply and Exhaust Fan Blade Positioners therefore LCO 3.8.1 Condition B was exited for D2 Diesel Generator due to it being declared Operable.

"At no time was the health and safety of the public threatened.

"The Senior NRC Resident has been notified."

AGREEMENT STATE REPORT- DAMAGED GAUGE

The following information was received by the State of Texas by email:

"On June 3, 2014, the Agency [Texas Department of State Health Services] received notice that the licensee had a damaged Berthold LB300ML gauge (S/N 10004). The gauge had been hit with molten steel and damage had been done to attachment points ('ears') for a locking mechanism and carrying handle. No damage to the 2.5 milliCurie cobalt-60 source (S/N 1374-07-11) or the gauge shutter occurred. The gauge is scheduled for repair on June 5, 2014. Additional information will be supplied as it is received in accordance with SA-300."

Texas Incident: I-9198

* * * UPDATE FROM ART TUCKER TO HOWIE CROUCH VIA EMAIL ON 6/24/14 AT 0959 EDT * * *

"On June 23, 2014, the Agency [Texas Department of State Health Services] received a written report from the licensee stating the gauge shutter was not damaged during this event. The licensee stated they were able to close the shutter at the time of the event. The gauge was placed in a locked storage box. The manufacturer has completed repairs to the gauge and the gauge has been returned to service. The licensee stated no additional exposure was received by their employees or members of the general public.

"Additional information will be provided in accordance with SA-300."

Notified R4DO (Allen) and FSME Events Resource email.