Event Notification Report for February 23, 2016

UNANALYZED CONDITION INVOLVING NORMALLY OPEN BATTERY ROOM DOORS

"At CPNPP [Comanche Peak Nuclear Power Plant], eyewash stations are located just outside of the Class 1E battery rooms. The battery room doors are normally open and if a MELB [Moderate Energy Line Break] occurred on the demineralized water line connected to the eyewash station, the water could potentially spray onto the Class 1E safety related batteries. If this occurred, an electrical short could potentially cause a loss of both the batteries and the associated battery chargers.

"This condition has been conservatively determined to be reportable per 10 CFR 50.72(b)(3)(ii)(B) as an unanalyzed condition. Currently, the demineralized water lines on the battery room eyewash stations for both Units 1 and 2 have been isolated, therefore, all safety related equipment is currently operable. Comanche Peak Engineering is performing a past operability review of this condition.

"The NRC Resident Inspector has been notified."

* * * RETRACTION AT 1821 EST ON 02/27/2016 FROM DANNY BRADFORD TO JEFF HERRERA * * *

"On February 23, 2016 at 2045 [EST], Comanche Peak reported an unanalyzed condition per 10 CFR 50.72(b)(3)(ii)(B). Specifically, the reported condition involved eyewash stations that are located just outside of the Class 1E battery rooms. The battery room doors are normally open and if a Moderate Energy Line Break (MELB) occurred on the demineralized water line connected to the eyewash station, the water could potentially spray onto the Class 1E safety related batteries. If this occurred, an electrical short could have potentially caused a loss of both the batteries and the associated battery chargers. This condition was conservatively determined to be reportable per 10 CFR 50.72(b)(3)(ii)(B) as an unanalyzed condition. The demineralized water lines on the battery room eyewash stations for both Units 1 and 2 were isolated, and Comanche Peak Engineering initiated a past operability evaluation of this condition.

"The past operability evaluation has been completed and shows that there are no operability concerns regarding a MELB impact on the Class 1E batteries, DC bus or Class 1E battery chargers. Therefore, Comanche Peak requests that the February 23, 2016, 10 CFR 50.72(b)(3)(ii)(B) reportable event for Units 1 & 2 be retracted."

The NRC Resident Inspector has been notified.

Notified the R4DO (Whitten).

AGREEMENT STATE REPORT - SOURCE DISCONNECT ON FIXED GAUGE

The following information was received from the State of Illinois via email:

"On February 23, the licensee's radiation safety officer (RSO) called to advise that a sealed source of Cs-137 became separated from its handling rod within a fixed gauge and was now resting at the bottom of a seven foot 'well tube' within a nine foot conical reaction process vessel on their property. The well tube is centered on the vertical axis of the vessel and provides a protected environment for the source holder and rod. Previously the vessel had been emptied for routine maintenance and was being returned to service when the event took place. The current configuration is similar to that of its routine operating configuration other than the gauge is now 'always on' and cannot be returned to its normal shielded position, should the need exist. The plant plans on returning the vessel to service and refilling the vessel with reactants. This material should provide additional shielding such that accessible surface dose rates of the vessel are less than 1 mR/h.

"The licensee is making arrangements with the manufacturer to come to the site and recover/dispose of the gauge and the source. Until that time, on site safety personnel and the process operating engineers have been advised of the situation and of the necessary precautions to observe should it become necessary to empty the vessel under emergency conditions. Under no circumstances will individuals be allowed access to the interior of the vessel without otherwise receiving explicit approval for the activity.

"Pending recovery of the source by the manufacturer and receipt of the formal written report from the licensee, this matter remains open. No investigation by the Agency [Illinois Emergency Management Agency] is planned at this time."

Fixed Gauge Manufacturer: Kay-Ray/Sensall
Model Number: 7065
Serial Number: 28219

Source: Cs-137
Activity: 0.027 Ci

Illinois Incident #: IL16001

AGREEMENT STATE REPORT - RECEIVED DOSE FROM BRACHYTHERAPY TREATMENT DIFFERENT THAN PRESCRIBED DOSE

The following was received from the Commonwealth of Kentucky via facsimile:

"KY RHB [Kentucky Department for Public Health & Safety, Radiation Health Branch] was notified by telephone on 5/3/16 at approximately 1600 [EDT] by a representative from Taylor Regional Hospital, of a medical event involving 2 separate patients that had permanent prostate implants using Pd-103. Both patients had implants on 2/23/16 and post implant CT's [computed tomography] on 3/22/16. Post implant dosimetry for one patient revealed the dose received to 90 percent of the prostate was 83.19 Gy and the prescribed dose was 125 Gy (66.55 percent of prescribed). The second patient received 89.06 Gy of the 125 Gy prescribed (71.25 percent of the prescribed). Additional information expected from the licensee.

"Event Report ID No.: KY160002"

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.