ENS 44086: Difference between revisions
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StriderTol (talk | contribs) (Created page by program invented by StriderTol) |
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| event date = 03/21/2008 15:25 CDT | | event date = 03/21/2008 15:25 CDT | ||
| last update date = 03/21/2008 | | last update date = 03/21/2008 | ||
| title = Automatic Reactor Scram | | title = Automatic Reactor Scram from a Main Turbine Trip | ||
| event text = Actuation of an RPS signal while the reactor was critical. | | event text = Actuation of an RPS signal while the reactor was critical. | ||
At 1525 a generator trip signal on the main transformers initiated a reactor scram due to Turbine Stop and Control Valve fast closure. Safety relief valves operated initially to lower reactor pressure. Turbine bypass valves operated initially to lower reactor pressure. Turbine bypass valves are maintaining pressure control currently. Reactor recirc pumps A and B transferred to slow speed operation as expected. No ECCS initiations were received. Reactor level is being controlled with normal systems condensate and feedwater. Lowest level indicated was approximately -6" wide range. Level 3 initiations occurred to group 3 isolation valves. No valves operated, they are normally closed. | At 1525 a generator trip signal on the main transformers initiated a reactor scram due to Turbine Stop and Control Valve fast closure. Safety relief valves operated initially to lower reactor pressure. Turbine bypass valves operated initially to lower reactor pressure. Turbine bypass valves are maintaining pressure control currently. Reactor recirc pumps A and B transferred to slow speed operation as expected. No ECCS initiations were received. Reactor level is being controlled with normal systems condensate and feedwater. Lowest level indicated was approximately -6" wide range. Level 3 initiations occurred to group 3 isolation valves. No valves operated, they are normally closed. |
Latest revision as of 22:14, 1 March 2018
Where | |
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Grand Gulf ![]() Mississippi (NRC Region 4) | |
Reporting | |
10 CFR 50.72(b)(2)(iv)(B), RPS Actuation | |
Time - Person (Reporting Time:+-2.43 h-0.101 days <br />-0.0145 weeks <br />-0.00333 months <br />) | |
Opened: | Ernest Mathes 17:59 Mar 21, 2008 |
NRC Officer: | Mark Abramovitz |
Last Updated: | Mar 21, 2008 |
44086 - NRC Website
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