Event Notification Report for May 28, 2008

MASSACHUSETTS AGREEMENT STATE REPORT - SCRAP METAL LOAD SET OFF RADIATION ALARM

The following information was received from the State of Massachusetts via facsimile:

"A shipment of ferrous scrap metal from a trash to energy generating facility set off the radiation alarms at the entrance to the scrap facility and was immediately rejected. A consultant responded to the facility with an isotope identifier and reported Radium-226 in the load. Insofar as the highest exposure rate on the surface of the trailer was 0.6 millirem/hour, a DOT-E 10656 was issued to permit travel back to the point of origin. The company that originated the shipment has acquired the services of a different consultant to evaluate the situation at their facility, contain the problem and to document the legal disposition of the radioactive material."

TRANSPORTATION ACCIDENT INVOLVING A RADIOACTIVE MATERIAL SHIPMENT

"On May 28,2008 at 1630 CDT Browns Ferry was informed that a tractor trailer transporting a shipment of radioactive material from Browns Ferry Nuclear Plant (shipment # 080518) was involved in a 2 car traffic accident near Corinth, Mississippi. Local law enforcement responded to the accident. The Mississippi Emergency Management System was notified as well as the Local EMA in Alcorn County, Mississippi. Investigation into the accident concluded that no personnel injuries occurred and there was no damage to the radioactive material shipment container. Presently another tractor is in route to the area to continue transportation of the shipment.

"The licensee notified the NRC Resident Inspector.

"This event is reportable as a 4 hour Non-Emergency Notification report in accordance with 10 CFR 50.72(b)(2)(xi), 'Any event or situation, related to the heath and safety of the public or onsite personnel, or protection of the environment, for which a news release is planned or notification to other government agencies has been or will be made.'"

HIGH PRESSURE CORE SPRAY INOPERABLE

"On May 28, 2008, at 1730 hours, control room operators determined after testing, that the Emergency Service Water (ESW) Division 3 Subsystem was inoperable due to a condition that will not allow the subsystem to maintain 'keep-fill' pressure in the event of a loss of offsite power. Technical Specification (TS) Limiting Condition for Operation (LCO) 3.7.2 requires that the High Pressure Core Spray (HPCS) System (a single train safety system) be declared inoperable immediately when the ESW Division 3 Subsystem is inoperable. The plant immediately entered TS LCO 3.5.1 Condition B, HPCS System inoperable. TS LCO 3.5.1, Required Action B.1, verify by administrative means that the Reactor Core Isolation Cooling System is operable within one hour, was completed at 1730 hours. Required Action B.2 requires that the HPCS System be restored to operable status within 14 days. Maintenance/troubleshooting activities are in progress to determine the cause of the ESW Division 3 Subsystem condition.

"This event is being reported as a condition that could have prevented the safety function of structures or systems required to mitigate the consequences of an accident. The resident inspector has been notified."

MANUAL REACTOR TRIP DUE TO IMPROPER MOVEMENT OF CEA'S

"The following event description is based on information currently available. If through subsequent reviews of this event, additional information is identified that is pertinent to this event or alters the information being provided at this time, a follow-up notification will be made via the ENS or under the reporting requirements of 10 CFR 50.73.

"On May 28, 2008, at approximately 2134 Mountain Standard Time (MST) Palo Verde Unit 2 operators manually tripped the reactor, as directed by procedures, when four Control Element Assembly (CEAs 7, 9, 11 &13) of shutdown bank A slipped to the fully inserted position while conducting low power physics testing following Unit 2's fourteenth refueling outage. Unit 2 was critical [Intermediate Range 5.0E-2]and at normal operating temperature and pressure prior to the trip. Following the manual reactor trip all remaining CEAs inserted fully into the reactor core. This was an uncomplicated reactor trip. No emergency classification was required per the Emergency Plan. No automatic ESF actuations occurred and none were required. Safety related buses remained energized during and following the reactor trip. The Emergency Diesel Generators did not start and were not required. The offsite power grid is stable. No LCOs have been entered as a result of this event. No major equipment was inoperable prior to the event that contributed to the event.

"Unit 2 is stable at normal operating temperature and pressure in Mode 3. The event did not result in any challenges to fission product barriers and there were no adverse safety consequences as a result of this event. The event did not adversely affect the safe operation of the plant or the health and safety of the public.

"The cause of the slipped CEAs is not known at this time and is under investigation.

"The Senior Resident Inspector was informed of the Unit 2 reactor trip."

TWO MEDICAL EVENTS INVOLVING RECEIVED DOSE LESS THAN PRESCRIBED DOSE

During an on-site NRC Inspection two (2) medical events were identified both involving a delivered dose less than the prescribed dose following implant of Palladium-103 seed for prostate therapy. Specific details as follows:

First Medical Event

Preplanning date: 5/18/08
Post planning date: 5/18/08
Dose received by prostate volume: 44%
Underdose: 56%
Prescribed: Palladium-103, 140.42U consisting of 59 seeds, 2.38U/seed

Second Medical Event

Preplanning date: 7/8/08
Post planning date: 7/8/08
Dose received by prostate volume: 44%
Underdose: 56%
Prescribed: Palladium-103, 196.80U consisting of 82 seeds, 2.38U/seed

Both underdoses are attributed to prostate swelling. The physician reviewing the results concluded that there was no adverse impact on either patient. The licensee will continue reviewing medical records to identify any additional occurrences of this nature.

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.

* * * RETRACTION FROM MIREL PALAMARU TO VINCE KLCO ON 1/25/11 AT 1829 EST * * *

Based on a post evaluation by the licensee's Radiation Safety Officer and physicians, all delivered dose came within 20% of overall prescribed dose. Thus, this is not considered a medical event.

Notified the R3DO (Stone), and FSME (McIntosh).