Event Notification Report for March 13, 2012

60-DAY OPTIONAL REPORT - INVALID PRIMARY CONTAINMENT ISOLATION SYSTEM ACTUATION

"This 60-day report, as allowed by 10 CFR 50.73(a)(1), is being made under the reporting requirement in 10CFR50.73(a)(2)(iv)(A) to describe an unplanned, invalid actuation of specified systems, specifically the Unit 2 Primary Containment Isolation System (PCIS). On 3/13/12, at approximately 1604 hours, Unit 2 experienced an invalid PCIS partial isolation. An equipment operator was in the process of making an adjustment to the Reactor Protection System (RPS) MG Set output voltage during daily rounds. As the rheostat was beginning to be rotated to increase the voltage, output voltage quickly dropped below the MG Set undervoltage trip setpoint. The BC757B and BC757D MG Set output breakers opened, resulting in the loss of the 2B RPS bus causing a half scram. The half scram signal resulted in closure of the instrument nitrogen primary containment isolation valve, secondary containment normal ventilation isolation valves and start of the 'B' Standby Gas Treatment supply fan.

"The invalid PCIS isolation was a result of the failure of the voltage adjustment rheostat for the MG Set output voltage.

"This issue has been entered into the site Corrective Action Program (AR 1340452) for evaluation and implementation of further corrective actions. The NRC Resident Inspector has been informed of this notification."

AGREEMENT STATE REPORT - RADIOGRAPHY CAMERA WAS LOST AND RECOVERED

A radiographer working for High Mountain Inspection was conducting radiography on a pipeline near De Beque, CO. The radiographer failed to secure the camera in his pickup truck when he drove off to the next location. Arriving at his destination the radiographer realized his camera was missing and retraced his steps. The radiography camera with a 26 Curie, Ir-192 source was not located.

At 1826 EDT the State of Colorado called and said a member of the public had found the missing camera and called the licensee. The licensee is now in possession of the radiography camera and the source has not been tampered with.

The camera is a SPEC, s/n 150. The source s/n is SJ0702.

THIS MATERIAL EVENT CONTAINS A "CATEGORY 2" LEVEL OF RADIOACTIVE MATERIAL

Category 2 sources, if not safely managed or securely protected, could cause permanent injury to a person who handled them, or were otherwise in contact with them, for a short time (minutes to hours). It could possibly be fatal to be close to this amount of unshielded radioactive material for a period of hours to days. These sources are typically used in practices such as industrial gamma radiography, high dose rate brachytherapy and medium dose rate brachytherapy. For additional information go to http://www-pub.iaea.org/MTCD/publications/PDF/Pub1227_web.pdf

OFFSITE NOTIFICATION OF A SEWAGE LEAK

"A Sewage Lift Station overflow occurred due to equipment failure. The overflow was discovered at 1400 CDT and terminated shortly thereafter. CPNPP Environmental notified TCEQ (Texas Commission on Enviornmental Quality) Region 4 (DFW) at 1441 CDT. This is reportable as a bypass of untreated wastewater as defined in the TPDES [Texas Pollution Discharge Elimination System] Permit. CPNPP Environmental personnel have completed disinfection of the affected area."

The licensee estimated the leak to be between 100 and 200 gallons with a small portion reaching the lake. The equipment failure is suspected as being a failed level indicating system. The licensee will notify the NRC Resident Inspector.

EMERGENCY OPERATIONS FACILITY PLANNED MAINTENANCE

"At approximately 0800 EDT on March 13, 2012, preplanned maintenance will be performed on the Emergency Operations Facility (EOF) ventilation system. This maintenance will be performed for charcoal sampling and filter testing. This maintenance is planned to be performed and completed within 10 hours. If an emergency condition should occur that would require activation of the EOF, the Harris Nuclear Plant (HNP) emergency plan has procedural guidance for use of an alternate location.

"This event is reportable per 10 CFR 50.72(b)(3)(xiii) as described in NUREG-1022, Rev. 2 since this work activity affects an emergency response facility for the duration of the maintenance."

The licensee notified the NRC Resident Inspector.

* * * UPDATE AT 1707 EDT ON 3/13/2012 FROM RICHARD VANDENBERG TO MARK ABRAMOVITZ * * *

Maintenance was completed and the system tested operable at 1645 EDT. The licensee notified the NRC Resident Inspector.

Notified the R2DO (Guthrie).