ENS 45145
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ENS Event | |
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18:17 Jun 20, 2009 | |
Title | Automatic Reactor Scram from High Reactor Pressure Scram Signal |
Event Description | Plant Hatch Unit 2 experienced a full reactor scram from the main generator protection circuitry (generator runback circuit). Preliminary indications are that a main generator high temperature signal was received, initiating the generator protection (runback) circuitry and a high reactor pressure scram signal was received during the turbine/generator runback. Investigations into the cause of the generator high temperature signal are ongoing.
Reactor water level was recovered using the reactor feed system, and reactor pressure was controlled using main turbine bypass valves. All control rods inserted, as expected, during the scram. Other than the cause of the main generator high temperature signal, all systems functioned as expected. Unit is currently at 837 psig; 540 degrees F in Mode 3. Electrical system is in a normal lineup. The licensee informed the NRC Resident Inspector. |
Where | |
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Hatch Georgia (NRC Region 2) | |
Reporting | |
10 CFR 50.72(b)(2)(iv)(B), RPS Actuation | |
Time - Person (Reporting Time:+-2.5 h-0.104 days <br />-0.0149 weeks <br />-0.00342 months <br />) | |
Opened: | Ed Burkett 15:47 Jun 20, 2009 |
NRC Officer: | Joe O'Hara |
Last Updated: | Jun 20, 2009 |
45145 - NRC Website
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Unit 2 | |
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Reactor critical | Critical |
Scram | A/R |
Before | Power Operation (100 %) |
After | Hot Shutdown (0 %) |
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