ENS 41229
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ENS Event | |
---|---|
05:09 Nov 29, 2004 | |
Title | Technical Specifications Required Shutdown Due to Dropped Control Rod |
Event Description | Dropped rod E-11 in Shut Down Bank 'B' at 2334 on 11/28/04 while performing Low Power Physics Testing after refueling. Shutdown bank not fully withdrawn with dropped rod placed Unit 3 in Tech Spec Action Statement 3.0.3. RX trip breakers were opened at 0009 [11/29/04]. Unit 3 entered 3-EOP-E.O, Reactor Trip or Safety Injection, the unit was placed in Mode 3 and transitioned to 3-EOP-ES-0.1, Reactor Trip Response and then into 3-GOP-301. All plant equipment responded as required and the unit remains stable in mode 3 while the Rod Control failure is investigated.
The licensee notified the NRC resident inspector.
The purpose of this update is to clarify that the reactor was not critical at the time of reactor trip. The dropped rod added sufficient negative reactivity to render the reactor subcritical prior to the manual reactor trip. The cause of the dropped rod was an intermittent contact in a pin connector associated with rod E-11. The licensee will inform the NRC Resident Inspector. Notified R2DO (Landis). |
Where | |
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Turkey Point ![]() Florida (NRC Region 2) | |
Reporting | |
10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown 10 CFR 50.72(b)(3)(iv)(A), System Actuation | |
Time - Person (Reporting Time:+-3.55 h-0.148 days <br />-0.0211 weeks <br />-0.00486 months <br />) | |
Opened: | Tim Jones 01:36 Nov 29, 2004 |
NRC Officer: | Mike Ripley |
Last Updated: | Jan 11, 2005 |
41229 - NRC Website
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Unit 3 | |
---|---|
Reactor critical | Not Critical |
Scram | Yes, Manual Scram |
Before | Startup (0 %) |
After | Hot Standby (0 %) |
Turkey Point ![]() | |
WEEKMONTHYEARENS 568132023-10-25T01:59:00025 October 2023 01:59:00
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