ENS Event | |
|---|---|
09:20 Oct 16, 2006 | |
| Title | Failure of Containment Ventilation Isolation Instrumentation |
| Event Description | At 0520 hours0.00602 days <br />0.144 hours <br />8.597884e-4 weeks <br />1.9786e-4 months <br /> on 10/16/06 with the plant in Mode 6, with containment shutdown purge system in operation and core alterations in progress, a Control Room Operator noted that Main Control Board annunciator L-4 'Safeguard DC Failure [Containment Isolation] CI and [Containment Ventilation Isolation] CVI Logic' was illuminated.
ITS LCO 3.9.3 c. 2. requires that 'Each penetration providing direct access from the containment atmosphere to the outside atmosphere shall be either (1) closed by a manual or automatic isolation valve, blind flange, or equivalent, or (2) capable of being closed by an operable Containment Ventilation Isolation System.' ITS LCO 3.3.5 Containment Ventilation Isolation Instrumentation Table 3.3.5-1 requires that Function 1, 'Automatic Actuation Logic and Actuation Relays' be operable during core alterations and movement of irradiated fuel assemblies within containment. Contrary to the requirements DC power was removed from the Containment Ventilation Logic and Actuation Relays on Friday 10/13/06. On Saturday 10/14/06 reactor vessel head lift was performed. Between Sunday 10/15/06 from 1559 until Monday at 0514 the movement of fuel and core alterations in containment were conducted. All fuel movement and core alterations were stopped at 0514 on 10/16/06. The licensee notified the NRC Resident Inspector. |
| Where | |
|---|---|
Ginna  New York (NRC Region 1) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material | |
| Time - Person (Reporting Time:+1.67 h0.0696 days <br />0.00994 weeks <br />0.00229 months <br />) | |
| Opened: | Kevin Mclaughlin 11:00 Oct 16, 2006 |
| NRC Officer: | John Knoke |
| Last Updated: | Oct 16, 2006 |
| 42909 - NRC Website
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WEEKMONTHYEARENS 429092006-10-16T09:20:00016 October 2006 09:20:00
[Table view]10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material Failure of Containment Ventilation Isolation Instrumentation 2006-10-16T09:20:00 | |