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| Entered date | Event description | |
|---|---|---|
| ENS 43486 | 12 July 2007 17:31:00 | The following voluntary report is being made as a result of the Industry Ground Water Protection Initiative NEI-07-07. During a heavy rain downfall on 7/11/2007, the U1 Refueling Water Storage Tank (RWST) water basin overflowed. This overflow was slightly contaminated due to prior contamination of insulation which surrounds the RWST. The rainfall is believed to (have leached) the contamination from the insulation to the basin. In accordance with NEI-07-07 guidance, a voluntary communication has been made to the appropriate State/Local officials. Thus the purpose of this notification is to inform NRC of this voluntary notification to State/Local agency. The release was less than regulatory (ODCM or 10 CFR 20 Appendix B) limits. The licensee notified the NRC Resident Inspector. |