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| Entered date | Event description | |
|---|---|---|
| ENS 44057 | 12 March 2008 17:33:00 | At approximately 1430 CDT on 3/12/08 Prairie Island staff completed a preliminary review of a revised dose analysis for the Prairie Island Technical Support Center (TSC) that called into question the long term habitability of the TSC under bounding accident conditions. The preliminary calculation result exceeds the 30-day 5 rem whole body dose acceptance criteria of NUREG-0696 and is based on bounding case assumptions consistent with Regulatory Guide 1.4 (including fuel melt, highest allowable containment leakage and bounding atmospheric dispersion factors). The primary contributor is an approximately 25 square foot window in the north wall of the TSC. Compensatory measures are being established to provide shielding over the window in the TSC. The licensee will notify the NRC Resident Inspector. |
| ENS 44055 | 12 March 2008 13:07:00 | At approximately 0815 CDT, on March 12, 2008, a Dakota County corrections officer inadvertently activated the Dakota County sirens from the backup unit during the conduct of a silent siren test. The licensee was notified of the siren activation by the activation signal received on the informer unit in the Technical Support Center (TSC) at 0815, as well as a subsequent phone call from the siren contractor. Seven of the 117 sirens in the 10-mile Emergency Planning Zone (EPZ) were activated for approximately 3 minutes. No press release is planned by Xcel Energy. Dakota Communications Center received a call from a local radio station asking why the sirens were activated. No other press release is planned by Dakota County. The NRC Senior Resident Inspector was notified. |