05000352/LER-2002-001
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| 3522002001R00 - NRC Website | |
Unit Conditions Prior to the Event At the time of the event, Unit 1 was in Operational Condition (OPCON) 1 (power operations) at 87% power level in coastdown prior to the I R09 refueling outage. Unit 2 was in Operational Condition (OPCON) 1 at 100% power level. There were no structures, systems or components out of service that contributed to the event. There were no radiological consequences associated with the incident.
Description of the Event
On February 25, 2002 a contractor requesting access to the site for refueling outage 1R09 provided a urine sample that gave indication of being adulterated (soap-like odor). Per procedure, a second, witnessed sample was provided. Both samples were sent to an off site testing facility. Both sample numbers were entered into the computer tracking system in the"pending" status.
The next day the fitness for duty analyst received a negative result on the second (witnessed) sample and updated the computer tracking system to reflect acceptable results for that sample. When the information for this second sample was input, the acceptable test result information was unknowingly carried forward to indicate "acceptable" on the badging screen, overwriting the "pending" indication.
On February 27 the badge fabrication clerk checked the computer tracking system, noted the acceptable result and loaded the badge information into the security computer.
The contractor was notified on February 28 that access was granted. The contractor entered the protected area at 11:41 hours. At 14:07 hours the contractor and 4 other contractors entered the Unit 2 area and exited the Unit 1 area at 14:25 hours. At approximately 15:23 hours the contractor exited the protected area.
On February 28 at 18:05 hours the Fitness for Duty analyst received notification from the Medical Review that the first sample was positive. The computer tracking system was reviewed. The badge was immediately pulled (inactive status). An investigation was initiated.
On March 1, 2002 at 02:16 hours, a determination was made, based on guidance contained in NRC Generic Letter 91-03, that this event should be reported.
On Match 1, 2002 at 02:29 hours a one-hour emergency notification was made in accordance with 1OCFR73.71(b)1. This SER is being submitted pursuant to the requirements of 1OCFR73.71(d)
Cause of the Event
The event was caused by a logic flaw in the badging computer tracking system. When the Fitness for Duty analyst entered the negative result in the computer tracking system, the system overwrote the pending status on the badging screen that allowed badging personnel to issue a badge to the contractor. The badging personnel did not realize that there was a second sample taken.
Consequences of the Event There were no adverse consequences As a result of the event. The contractor was accompanied by 4 other contractors for about 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> who were authorized. There was no evidence of sabotage or malevolent intent. There was no impact on plant safety.
Corrective Action Completed The contractor's badge was pulled and placed in inactive status. It was confirmed that the individual was no longer in the protected area. The security computer access history for the contractor was reviewed to determine the contractor's activities while in the protected area.
Corporate Security personnel interviewed all the individuals involved.
The computer tracking system was reviewed to ensure that no other individuals were in the pending status for fitness for duty status. None were found. An additional signoff step has been added for access authorization for "pending" fitness for duty issues. A Corrective Action Program (CAP) report was created to capture and track to closure all identified issues dealing with this event. A Nuclear Operations Notification (NON) was generated and distributed to all Exelon Nuclear sites.
Corrective Actions Planned None Previous Similar Occurrences None