05000387/FIN-2008004-01
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Finding | |
|---|---|
| Title | Inadequate Equipment to Assess Threshold for Emergency Action Level |
| Description | The inspectors identified a NCV associated with emergency planning standard 10 CFR 50.47(b)(4). The inspectors determined that a performance deficiency existed in that inadequate indications were available for operators to determine if a threshold for emergency action levels (EALs) based on sustained wind speed in the protected area, had been met. On the afternoon of July 17, 2008, a severe thunderstorm with winds in excess of 50 miles per hour (mph) passed though the plant site. The storm caused damage to non-vital structures and resulted in the loss of two, 13.2 kilovolts (kV) power lines which interrupted power to several non-power block buildings on site. Inspectors observed operators responding to the event and identified that the wind speed indicator in the control room had indicated the maximum value for several minutes. This recorder only displayed wind speeds up to a maximum of 50 mph. Inspectors also observed that the backup wind speed indication, located 6 miles from the site and which reads from 0- 100 mph, was inoperable during the storm. Inspectors identified that the Unit Supervisor had mistakenly read the wind direction trace on the recorder and had determined a 65 mph wind speed in error. Based upon direct observations during this adverse weather event, the inspectors determined that the operators did not have adequate indications available to determine if the threshold, sustained winds of greater than 80 mph, for EALs OA5 or OU5, had been met. This finding is greater than minor because it was associated with the Emergency Preparedness (EP) cornerstone attribute of Facilities and Equipment, and affected the cornerstone objective of ensuring that a licensee is capable of implementing adequate measures to protect the health and safety of the public in the event of a radiological emergency. This finding is of very low safety significance (Green) because it did not result in the Risk-Significant Planning Standard Function being lost or degraded. This finding is related to the cross-cutting area of Problem Identification and Resolution - Corrective Action Program because PPL did not take appropriate corrective actions to address a safety issue in a timely manner, commensurate with its safety significance and complexity. Specifically, the NRC had previously identified this potential vulnerability over two years prior to the event and the licensee had entered the concern into their CAP; however, corrective actions were not implemented. P.1(d) (Section 1R01) |
| Site: | Susquehanna  |
|---|---|
| Report | IR 05000387/2008004 Section 1R01 |
| Date counted | Sep 30, 2008 (2008Q3) |
| Type: | NCV: Green |
| cornerstone | Emergency Prep |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.01 |
| Inspectors (proximate) | F Jaxheimer G Newman K Young J Furia A Rosebrook A Ziedonis |
| CCA | P.3, Resolution |
| INPO aspect | PI.3 |
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Finding - Susquehanna - IR 05000387/2008004 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Susquehanna) @ 2008Q3
Self-Identified List (Susquehanna)
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