Event Notification Report for March 31, 2012

MANUAL REACTOR TRIP DUE TO UNCONTROLLED COOLDOWN

"At 0022 (EDT) on 03/31/12 while maintaining power stable at 10% for Steam Bypass Control System testing, Unit 1 was manually tripped due to an uncontrolled cooldown caused by PCV-8802 (Steam Bypass Control Valve) unexpectedly opening. Following the trip, PCV-8802 closed and the secondary was isolated by closing the Main Steam Isolation Valves per Standard Post Trip Actions. Following isolation of the steam demand, the trip was uncomplicated with all CEAs fully inserted. No automatic safety system actuations were required and none occurred. The cause of the unexpected opening of the Steam Bypass Control System valve is under investigation.

"The plant is stable in Mode 3 at normal operating temperature and pressure. RCS Heat Removal is being maintained with Auxiliary Feedwater and Atmospheric Dump Valves. The Offsite power grid is available and stable.

"This non-emergency notification is being made pursuant to 10 CFR 50.72(b)(2)(iv)(B) due to manual RPS actuation with the reactor at power."

The RCS cooled down from 532 degree to 515 degrees over a period of approximately 2 minutes and 40 seconds. The reactor was manually tripped when RCS temperature reached 515 degrees and the lowest RCS temperature observed after the trip was 505 degrees.

The licensee has notified the NRC Resident Inspector.

AGREEMENT STATE REPORT - FILM BADGE INDICATES RADIOGRAPHER OVEREXPOSURE

"KY RHB [Kentucky Radiation Health Branch] was notified on April 27, 2012, by the corporate RSO (CRSO) of Mistras Group, Inc. (license 201-699-05), that on the morning of April 27, 2012 he received a notice from Landauer that [an employee] received an extremely high dose reading on his film badge for the month of March 2012. The report stated that 'Dosimeter has exceeded the reporting capabilities of 1000 Rads, dosimeter reprocessed, second read agrees with reported dose.' The representative with Landauer told the CRSO that the image blinded the camera and was too blurry to read. She also stated that the reading was so high they could not get a reading. The CRSO conducted a telephone interview with [the employee] and he was told that his dosimeter never went off scale during that period and his film badge was on him at all times while performing radiography procedures. He did say his film badge may have been stored in his work bucket in the dark room of his transport vehicle. The CRSO has instructed [the employee] to turn in his [the employee's] current film badge to the office manager and is not to participate in radiographic operations until this matter has been resolved. According to a telephone conversation with the RSO early this evening, [the employee] is not experiencing any signs or symptoms of radiation exposure and he will be calling Oak Ridge tomorrow morning (5/1/12) to schedule blood work for [the employee]."

Kentucky Report: 120008

* * * THE RETRACTION FROM CURT PENDERGRASS TO JOHN SHOEMAKER AT 1538 EDT ON 7/17/12 * * *

The following retraction was received from the State of Kentucky via email.

The Kentucky Department of Radiation Control provided dose reconstruction results and corrective actions for EN 47879 purported overexposure of industrial radiographer. The Kentucky Department of Radiation Control wishes to retract this event due to the results in documents showing that, while this person's badge received a dose of 1,000 R, the individual received a dose of less than 200 mrem for the reporting period.

Notified R1DO (Dimitriadis) and FSME Events Resource (via email).