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| Entered date | Event description | |
|---|---|---|
| ENS 43887 | 9 January 2008 18:43:00 | Unit 3 was conducting a communication test of the Emergency Data Response System (ERDS). Following the test of the ERDS system, the ERDS modem would not disconnect with the NRC. The ERDS modem was disconnected in an effort to not overload the NRC communication system. The modem was disconnected at 16:30 EST on 1/9/2008. This constitutes a major loss of emergency assessment capability in accordance with 10 CFR 50.72 (b) (3) (xiii). The cause for the ERDS modem to auto-redial is not known. The ERDS link will be disconnected until the cause for the modem to auto-redial is determined and corrected. Follow-up NRC OC notification will be made when the ERDS link is re-established. The vendor is on site. The licensee has notified the resident inspector.
The ERDS modem has been repaired, tested satisfactorily, and returned to service. The licensee will notify the resident inspector. R2DO (Ayres) notified. |
| ENS 43705 | 10 October 2007 05:35:00 | The Emergency Response and Data Acquisition System (ERDADS) was out of service at 0000 EST on 10/10/2007. This resulted in a loss of the ERDS link of plant data to the NRC. This is an 8-hour reportable event pursuant to 10CFR50.72(b)(3)(xiii) Major Loss of Assessment Capability. The cause of the loss appears to be a computer malfunction, there is no evidence of tampering. Follow-up notification to the NRC will be given once Unit 4 ERDS is returned to service. As of 0515 ERDADS was available in the licensee control room, but the ERDS link was not available with the NRC. The licensee notified the NRC Resident Inspector.
Repairs are complete and the Unit 4 ERDADS system was tested Sat. at 1216 EDT on 10/12/07. The ERDS link of plant data to the NRC has been restored on Unit 4. The licensee notified the NRC Resident Inspector. R2DO (Desai) notified. |
| ENS 43408 | 6 June 2007 09:32:00 | At 0746, on 6/6/2007, a Unit 3 shutdown was initiated in accordance with station procedures. Unit 3 entered Technical Specification (TS) 3.0.3 at 0745 on 6/6/2007. TS 3.0.3 was entered when the Analog Rod Position Indicator (ARPI) for control rod F-4 was declared inoperable. Control rod F-4 is located in control bank C. The ARPI for control rod M6, which is also in control bank C, has been previously declared inoperable. With two ARPIs in control bank C inoperable, TS Limiting Condition for Operation 3.1.3.2, Action a, cannot be met thus necessitating entry into TS 3.0.3. ARPI repairs will be performed as required. The licensee notified the NRC Resident Inspector. * * * UPDATE FROM E. NEVILLE TO P. SNYDER AT 1400 ON 6/6/07 * * * Turkey Point Unit 3 entered Mode 3 at 1152 on 6/6/07 after manually tripping from approximately 25% power. At 1152 Turkey Point exited TS 3.0.3 since the condition for which it was entered no longer applied. The site borated to compensate for the control rods for which position indication was lost. All control rods fully inserted on the trip. The plant is currently steaming to atmospheric relief valves. No primary to secondary tube leaks exist. The licensee will notify the NRC Resident Inspector. Notified R2DO (Fredrickson). |