June 25
Unbelievable: They shutdown or tripped again!!! No event report today. My guess is they shut themselves down without scramming.
June 22
68% power. Seems a bit of a slowdown with the power increase.. What is broken now?
June 21
65% looking more like a normal startup.
Confused ANO with Grand Gulf. ANO didn't have a 50 day outage. Sorry.
June 20
40%
Update June 19
ANO stated up and at 2% today.
They are beating the hell out of their plants. ANO is already in a startup. At one point is the NRC going to say says shutdown and carefully think about your erratic operations.
Welcome to the trump's NRC. Well, welcome to the utilities' NRC?
***Makes A Mockery Out The NRC's ROP.
Obviously the plant was never ready for startup after their prolonged outage, and worst, the NRC didn't know about it. This has just got to be a world record. The fastest a plant has ever been cleared of the worst record in the nation and they are now on the road to get a special inspection over erratic power operation.
May 16 Startup from 50 day outage(very long outage)
May 17 Reactor trip
May 22 Reactor startup
June 4 2018: Arkansas Nuclear One and its over 900 employees got some great news Thursday when the U.S. Nuclear Regulatory Commission (NRC) hosted an afternoon meeting to go over the plant’s 2017 assessment.June 13 Reactor Trip
Kriss Kennedy, NRC regional administrator for Region IV, told the audience that after more than three years of hard work by staff and employees, ANO improved its performance and addressed several performance issues that got them into an increased regulatory oversight.
June 15 Reactor startup
June 17 reactor trip with serious complications
Troubled ANO 1: Stuck At 15% For Two Days And Their Recent Scram
Sounds like really poor training and not enough simulator time.
Power Reactor Event Number: 53459 Facility: ARKANSAS NUCLEAR
Region: 4 State: AR
Unit: [1] [] []
RX Type: [1] B&W-L-LP,[2] CE
NRC Notified By: KEVIN CASEY
HQ OPS Officer: ANDREW WAUGHNotification Date: 06/16/2018
Notification Time: 15:56 [ET]
Event Date: 06/16/2018
Event Time: 00:00 [CDT]
Last Update Date: 06/16/2018Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(2)(iv)(B) - RPS ACTUATION - CRITICAL
50.72(b)(3)(iv)(A) - VALID SPECIF SYS ACTUATIONPerson (Organization):
NICK TAYLOR (R4DO)
BO PHAM (IRD)
MICHAEL F. KING (NRR EO)
Unit SCRAM Code RX Crit Initial PWR Initial RX Mode Current PWR Current RX Mode 1 M/R Y 2 Startup 0 Hot Standby
Event Text
MANUAL REACTOR TRIP DURING STARTUP
"At 1121 CDT on June 16, 2018, Arkansas Nuclear One, Unit 1 (ANO-1) performed a manual reactor trip due to a Turbine Bypass valve failing open on reactor startup. At the time, ANO-1 was in Mode 2 at approximately 2 percent power.
"The failed Turbine Bypass valve resulted in an overcooling event and the Overcooling Emergency Operating Procedure (EOP) was entered. Main Steam Line Isolation (MSLI) automatic actuation occurred on 2 of the 4 channels of Emergency Feedwater Initiation and Control during the overcooling event in the 'B' Steam Generator. The remaining channels of MSLI were manually actuated by the control room staff from the control room. Overcooling was terminated after the closure of the Main Steam Isolation Valve (MSIV) and reactor coolant parameters were stabilized as directed by the Overcooling EOP. Additionally, Gland Sealing Steam was lost to the main turbine due to the closure of the 'B' Steam Generator MSIV and Loss of Condenser Vacuum Abnormal Operating Procedure was entered.
"This is a 4-hour non-emergency 10 CFR 50.72 (b)(2)(iv)(B) notification due to a Reactor Protection System actuation (scram) and an 8-hour non-emergency 10 CFR 50.72 (b)(3)(iv)(A) notification for safety system actuation."
All control rods fully inserted into the core during the trip. Heat removal is via the Atmospheric Dump Control valves to atmosphere.
The NRC Resident Inspector has been notified. The licensee also notified the State of Arkansas.
No comments:
Post a Comment