Nuclear Event – Automatic Reactor Trip: H.B. Robinson Steam Electric Plant, Unit 2, South Carolina
North America – USA | State of South Carolina, H.B. Robinson Steam Electric Plant, Unit 2
Location: 34°24’10.0″N 80°09’30.0″W
Site Operational Age: ~46 years
Event: RPS ACTUATION – CRITICAL/AUTOMATIC REACTOR TRIP
Nuclear Event in USA on Wednesday, 24 August, 2016 at 13:38 [EDT].
REACTOR TRIP DUE AUTOMATIC TURBINE TRIP FROM 100 PERCENT POWER
“At 1338 [EDT] on 08/24/2016, a turbine trip, and a subsequent reactor trip occurred. The cause is under investigation. Following the reactor trip, the Auxiliary Feedwater System actuated as expected on low steam generator level. At the time of the trip, the plant was in Mode 1. As of 1643 [EDT], the Plant is in Mode 3. The current RCS [Reactor Coolant System] Temperature is 548 degrees F (Average), and the Steam Generator Levels are in the range of 40 to 45% (normal range) with levels controlled by the Main Feedwater System. All systems and equipment operated as expected.
“Due to the automatic actuation of the Reactor Protection System, this event is being reported as a 4 hour Non-Emergency per 10 CFR 50.72(b)(2)(iv)(B). Due to the valid actuation of Auxiliary Feedwater System, this event is also being reported as an 8 hour Non-Emergency per 10 CFR 50.72(b)(3)(iv)(A)(B)(6). At no time during this occurrence was the public or plant staff at risk as a result of this event.
“The NRC Resident Inspector has been notified.”