ENS 45374
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ENS Event | |
|---|---|
17:34 Sep 21, 2009 | |
| Title | Unplanned Manual Reactor Trip During Reactor Startup |
| Event Description | At 1227 EDT, a reactor startup was commenced on Unit 2. Mode 2 was entered at 1325 EDT. At 1333, a Reactor Control Operator noted that Primary Safety Valve V1202 had indications that it was leaking past its seat. Plant procedures required reducing RCS [Reactor Coolant System] pressure in 100 psi increments until the safety reseated. This event required the plant pressure to be reduced to 200 psi below Normal Operating Pressure. Prior to commencing the depressurization, a manual reactor trip was ordered by the Unit Supervisor as discussed in the pre-evolution brief. The unit was in Mode 2 approaching criticality at the time of the trip. The unit is currently stable in Mode 3, Hot Standby.
The reactor trip was uncomplicated. All equipment operated as expected. Main feedwater remained available during the entire event. Auxiliary Feedwater and Atmospheric Dump Valves remained in service during the entire event. Unit 1 was unaffected by the event and remained at full power. The grid remained stable throughout the event. All control rods fully inserted. The licensee notified the NRC Resident Inspector. |
| Where | |
|---|---|
Saint Lucie  Florida (NRC Region 2) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(iv)(A), System Actuation | |
| Time - Person (Reporting Time:+-1.48 h-0.0617 days <br />-0.00881 weeks <br />-0.00203 months <br />) | |
| Opened: | David Lanyi 16:05 Sep 21, 2009 |
| NRC Officer: | Dong Park |
| Last Updated: | Sep 21, 2009 |
| 45374 - NRC Website
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Unit 2 | |
|---|---|
| Reactor critical | Not Critical |
| Scram | Yes, Manual Scram |
| Before | Startup (0 %) |
| After | Hot Standby (0 %) |
WEEKMONTHYEARENS 560872022-09-03T02:48:0003 September 2022 02:48:00
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