Event Notification Report for August 11, 2016

MANUAL REACTOR TRIP DUE TO LOSS OF TWO CIRCULATING WATER PUMPS

Reactor operators manually tripped the reactor due to the loss of two out of four circulating water pumps which caused a drop in condenser vacuum. The trip was uncomplicated. The reactor is shutdown and stable with decay heat removal via steam dumps to the condenser. The cause of the circulating water pump trips is currently unknown, but initial indications are that the pumps tripped due to a lightning strike that caused an electrical perturbation. The reactor will remain shutdown while the licensee investigates the cause. Unit 3 was not affected.

The licensee notified the NRC Resident Inspector and the State and Local governments.

CONTROL ROOM EMERGENCY VENTILATION SYSTEM DECLARED INOPERABLE

"At 1015 [EDT] on August 11, 2016, it was discovered that a Fire Protection damper associated with the Control Room Emergency Ventilation System had closed unexpectedly due to component failure. The closure rendered both trains of the Control Room Emergency Ventilation System (CREVS) inoperable requiring both Unit 1 and 2 to enter Technical Specification Limiting Condition of Operation (LCO) 3.7.10 Condition G. Condition G requires immediate entry into LCO 3.0.3. At 1159 on August 11, 2016, actions were taken to block the deficient damper in the open position restoring both trains of CREVS to a fully operable condition and allowing exit of LCO 3.0.3 and 3.7.10 Condition G.

"The purpose of CREVS is to provide a protected environment from which occupants can control the [respective] unit following an uncontrolled release of radioactivity, hazardous chemicals, or smoke. In the event of a design basis accident, emergency ventilation components realign to supply filtered air and to pressurize the Control Room Envelop (CRE). While the damper was closed both trains of CREVS were incapable of supplying the Relay Room as well as the Technical Support Center and its associated support spaces. These locations constitute part of the CRE, therefore both trains of CREVS were inoperable.

"Both trains of CREVS being inoperable affected the habitability of the TSC where the assessment capability of the facility for all emergencies was adversely effected.

"The NRC Resident Inspector has been notified."

AGREEMENT STATE REPORT - MISSING GAUGE WITH 100 MILLICURIE CO-60 SOURCE

The following report was received from the Tennessee Department of Environment and Conservation Division of Radiological Health via email:

"Licensee reported that a gauge with a 100 mCi Co-60 source was missing from a shipment with a carrier. Licensee accounted for the source upon leaving the licensee's facility. Licensee states that source is still in carrier's warehouse in Knoxville, TN, or in route to another site in Louisiana. Licensee is investigating warehouse and transport. A follow-up report will be sent upon receiving further information; this will include model number, activity, and shipping information."

TN State Event Report ID No.: TN-16-111

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

ROBINSON DAM TAINTER GATES UNANALYZED CONDITION

"During testing it was discovered that the H. B. Robinson Steam Electric Plant, Unit 2 (RNP) Lake Robinson Dam Tainter Gates A and B were in degraded condition. The Tainter Gates are non-technical specification features of design that control Lake Robinson water level. RNP was not able to achieve full opening of the Tainter Gates. Subsequent analysis has concluded that the degraded condition of the Tainter Gates adversely impacts their UFSAR credited safety function. On 8/11/2016, at 1505 EDT, it was determined this places RNP in an unanalyzed condition that significantly degrades plant safety [per] 10 CFR 50.72 (b)(3)(ii)(B). The Tainter Gates have been repaired, tested and rendered complaint with their original licensing basis function. The current plant status does not pose undue risk to the health and safety of the public.

"The NRC Senior Resident Inspector has been notified of this condition."

FIRE AT LICENSEE FACILITY

At approximately 1820 EDT on 8/11/16, St. Clair Power Plant, a coal-fired generation unit, caught fire in East China Township, Michigan. The Radiation Safety Officer (RSO) reported that 22 nuclear gauges (Texas Nuclear Model 5181, 5193, 5180A, 5192 and Ohmart Model SHGS-2, SH-100, SR-A) are used at the site which all contain Cs-137. The RSO will conduct an assessment of all the nuclear gauges on 08/12/16.

* * * RETRACTION AT 2127 EDT ON 08/12/16 FROM ROBERT TOZZIE TO JEFF HERRERA * * *

"On 8/11/16 at approximately 1820 EDT, the DTE Energy St. Clair Power Plant experienced a mechanical failure in the Unit 7 Turbine that resulted in a fire. The DTE Energy Radiation Safety Officer conservatively made an immediate report (within 4 hours) to the NRC on 8/11/16 at 2215 EDT based on the immediate reporting requirements of 10 CFR 30.50(a) due to, at the time, unknown conditions of nuclear gauges located in the area of the fire. The nuclear gauges are used for level measurement purposes.

"On 8/12/16, the DTE Energy Radiation Safety Officer completed an assessment of all nuclear gauges associated with the unit 7 fire. No gauges were found damaged or compromised. All unit 7 gauges were visually inspected with no structural damage identified. Radiological surveys were performed on all unit 7 gauges. Results of the radiological surveys showed normally expected dose rates and no loose surface contamination. Shutter mechanisms were closed and locked closed on all gauges in unit 7. Nuclear gauges in other units of the St. Clair Power Plant were not impacted by the fire event. These gauges were visually inspected and no signs of damage were identified. Based on the results of this assessment, DTE Energy retracts notification 52175."

Notified R3DO (Kozak) and NMSS Events Notification (via E-mail).

AGREEMENT STATE REPORT - UNDERADMINISTRATION OF Y-90 MICROSPHERES

The following was received from State of Maryland via email:

"Greater than 20 percent underadministration of the prescribed activity was administered to the left lobe of the patient's liver. Underadministration may have been up to 60 percent less than the prescribed written activity (preliminary estimate). Prescribed written directive activity to left lobe of liver was 25 mCi. Preliminary assessment of administered activity is 14 mCi. Radioactive material ended up in the patient catheter, chucks, and on the floor. All areas were cleaned and evaluated by the licensee. The licensee states that both the patient and referring doctor have been notified of the event. The licensee has history of many successful therapies of this type. The licensee is investigating the event, but has not yet determined a root cause. The licensee is sending a detailed written report to the State."

A Medical Event may indicate potential problems in a medical facility's use of radioactive materials. It does not necessarily result in harm to the patient.

AGREEMENT STATE REPORT - TWO MOISTURE-DENSITY GAUGES STOLEN

"On August 11, 2016 at 1240 [PDT], it was reported to the State of Nevada, Radiation Control Program (RCP) that two Troxler model 3440, Serial No. 24693 and model 3430, Serial No. 31409 portable gauges had been stolen from a storage location in Las Vegas, Nevada. The storage location is in a residential location. The RSO [Radiation Safety Officer] reported that at 0800 he removed the gauges from storage for routine maintenance. The gauges were in the lab with the door open and not secured or under surveillance for approximately three hours. When he returned the gauges were missing, no other equipment was missing. The RSO is the only employee. The Las Vegas Metropolitan Police, ARMOR division went to the storage address and took a police report. The RCP is following the incident and working with local authorities to recover the missing/stolen portable gauges. Follow-up information will be provide to the NRC as it becomes available. A press release was dispersed through law enforcement and the media."

Troxler 3440: 40 mCi Am-241 and 8 mCi Cs-137
Troxler 3430: 40 mCi Am-241 and 8 mCi Cs-137

NMED NV160013

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