I made a mistake. Grand Gulf remained shutdown. It was River Bend that scrammed.
The NRC and their oversite program just can't control these guys. This is unprecedented!!!!!
Power ReactorEvent Number: 53192Facility: RIVER BEND
Region: 4 State: LA
Unit: [1] [ ] [ ]
RX Type: [1] GE-6
NRC Notified By: Timothy Gates
HQ OPS Officer: VINCE KLCONotification Date: 02/01/2018
Notification Time: 14:23 [ET]
Event Date: 02/01/2018
Event Time: 10:57 [CST]
Last Update Date: 02/01/2018Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(2)(iv)(B) - RPS ACTUATION - CRITICALPerson (Organization):
RICK DEESE (R4DO)
UnitSCRAM CodeRX CRITInitial PWRInitial RX ModeCurrent PWRCurrent RX Mode1M/RY27Power Operation0Hot Shutdown
Event Text
MANUAL REACTOR SCRAM
"At 1057 CST on February 1, 2018 with the unit in Mode 1 at approximately 27% power, a manual actuation of the Reactor Protection System (RPS) was initiated due to an unexpected trip of the B Recirc Pump with A Recirc Pump in fast speed. B Recirc Pump tripped during transfer from slow to fast speed resulting in single loop operation. Operators were unable to reconcile differing indications of core flow. This resulted in a conservative decision to initiate a manual scram. The cause of the B Recirc Pump trip and the apparent issues with core flow indication are under investigation. The plant is currently stable in Mode 3.
"The plant response to the scram was as expected. All control rods [fully] inserted as expected; the feedwater system is maintaining reactor vessel water level in the normal control band and reactor pressure is being maintained with steam line drains and main turbine bypass valves.
"The NRC Senior Resident [Inspector] has been notified."
The NRC got to stop fooling around with these guys. You want them to be another ANO? They are a still a barely functional organization four years after entering the worst plant category. GG needs a long term shutdown. Entergy needs to taste this punishment. GG needs to massively upgrade their plant with new equipment.
***Well, the Turbine Control valves aren't a secondary system?
Yesterday I called my senior resident buddy at Grand Gulf. He got promoted. It was his last day at the plant. He is going to be boss of a set of inspectors in region I. He was leaving the plant
Junk Entergy Plant Grand Gulf At 17%, And Their Southern Regional Problem
Junk Plant Grand Gulf: Extraordinary Erratic Startup From Last Refueling Outage
permanently at noon. We talked extensively about the erratic operation of Grand Gulf for years and specifically about the current erratic thirteen day startup from the last scram or shutdown. I believe out talk was completed at about 10 am yesterday. So about eight hours after our conversation another scram sets in. I mean, these two events are a extraordinary coincident.
Power Reactor Event Number: 53188 Facility: GRAND GULF
Region: 4 State: MS
Unit: [1] [ ] [ ]
RX Type: [1] GE-6
NRC Notified By: RALPH FLICKINGER
HQ OPS Officer: DONG HWA PARKNotification Date: 01/30/2018
Notification Time: 21:56 [ET]
Event Date: 01/30/2018
Event Time: 18:22 [CST]
Last Update Date: 01/30/2018Emergency 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):
RICK DEESE (R4DO)
Unit SCRAM Code RX CRIT Initial PWR Initial RX Mode Current PWR Current RX Mode 1 M/R Y 91 Power Operation 0 Hot Shutdown
Event Text
MANUAL REACTOR SCRAM DUE TO MAIN TURBINE LOAD OSCILLATIONS
"On 1/30/2018 at 1750 [CST], the Reactor Pressure Control Malfunctions ONEP [Off Normal Event Procedure] was entered due to main turbine load oscillations of approximately 30 MWe peak to peak. At 1822 [CST], a manual reactor scram was inserted by placing the Reactor Mode Switch in Shutdown due to continued main turbine load oscillations.
"Reactor SCRAM ONEP, Turbine Trip ONEP, and EP-2 were entered. Reactor water level was stabilized at 36 inches narrow range on startup level and reactor pressure stabilized at 933 psig using main turbine bypass valves.
"Reactor Water Level 3 (11.4 inches) was reached which is the setpoint for Group 2 (RHR to Radwaste Isolation) and Group 3 (Shutdown Cooling Isolation). No valve isolated in these systems due to all isolation valves in these groups being in their normally closed position. The lowest Reactor Water level reached was -36 inches wide range.
"No other safety system actuations occurred and all systems performed as designed.
"That event is being reported under 10CFR 50.72(b)(2)(iv)(B) as any event or condition that results in actuation of the Reactor Protection System (RPS), when the reactor is critical and also reported under 10CFR 50.72(b)(3)(iv)(A), as any event or condition that results in actuation of RPS."
The MSIVs are open with decay heat being removed via steam to the main condenser using the bypass valves. Off site power is stable, and the plant is in a normal shutdown electrical lineup. RCIC (Reactor Core Isolation Cooling) was out of service for maintenance, and the reactor water level did not reach the system activation level. The cause of the main turbine load oscillations being investigated.
The licensee notified the NRC Resident Inspector.
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