ENS 50618: Difference between revisions
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StriderTol (talk | contribs) (Created page by program invented by Mark Hawes) |
StriderTol (talk | contribs) (Created page by program invented by StriderTol) |
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| event date = 11/15/2014 03:53 CST | | event date = 11/15/2014 03:53 CST | ||
| last update date = 11/15/2014 | | last update date = 11/15/2014 | ||
| title = Valid Actuation | | title = Valid Actuation of the Reactor Protection System for Abnormal Rod Position Indication | ||
| event text = This notification is being made as required by 10CFR 50.72(b)(3)(iv)(A) due to control room operators opening the Farley Nuclear Plant Unit 2 reactor trip breakers via the main control board hand switch during reactor startup procedures. This is a valid actuation of the reactor protection system. The reactor was not critical at the time the reactor trip breakers were opened. | | event text = This notification is being made as required by 10CFR 50.72(b)(3)(iv)(A) due to control room operators opening the Farley Nuclear Plant Unit 2 reactor trip breakers via the main control board hand switch during reactor startup procedures. This is a valid actuation of the reactor protection system. The reactor was not critical at the time the reactor trip breakers were opened. | ||
While withdrawing control rods for reactor startup and low power physics testing with control bank C at approximately 50 steps, Digital Rod Position indication for one of the control rods (M12) changed to 90 steps. The control room operators stopped withdrawing rods and entered FNP-2-AOP-19 (Malfunction of the Rod Control System). The reactor trip breakers were opened at 0353 CST. All rods inserted as expected. All other systems functioned normally. The plant is stable at normal operating pressure and temperature. | While withdrawing control rods for reactor startup and low power physics testing with control bank C at approximately 50 steps, Digital Rod Position indication for one of the control rods (M12) changed to 90 steps. The control room operators stopped withdrawing rods and entered FNP-2-AOP-19 (Malfunction of the Rod Control System). The reactor trip breakers were opened at 0353 CST. All rods inserted as expected. All other systems functioned normally. The plant is stable at normal operating pressure and temperature. | ||
Latest revision as of 20:49, 1 March 2018
| Where | |
|---|---|
Farley  Alabama (NRC Region 2) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(iv)(A), System Actuation | |
| Time - Person (Reporting Time:+-1.65 h-0.0688 days <br />-0.00982 weeks <br />-0.00226 months <br />) | |
| Opened: | Brannon Payne 08:14 Nov 15, 2014 |
| NRC Officer: | Dong Park |
| Last Updated: | Nov 15, 2014 |
| 50618 - NRC Website
| |