I got a special inspection over reactor vessel level control during a scram in 2015 (the mike mulligan River Bend special inspection) special inspection. The problem is they didn't do any scram testing and all the corrective action didn't take effect for many years. ( well, Christmas scram in 2014) (They need to purposely scram a few times with everyone on high alert to watch the plant's and staffs response. Then devise a scheme to fix it fast. Just like initial plant operational testing...)
"During the scram, level 8 occurred immediately"
So here we go again after a special inspection effectively nothing is fixed. Vessel level is just banging around...reactor vessel goes up and down like a mad man and tripping the feed pumps.
Lightning is not suppose to trip a nuclear plant. Did something crap out in their switchyard (fail) during a lightning strike.
When do they become a Pilgrim with too many scams...enhanced inspections because they are banging the whole plant around like level?
Power Reactor | Event Number: 51644 |
Facility: RIVER BEND
Region: 4 State: LA
Unit: [1] [ ] [ ]
RX Type: [1] GE-6
NRC Notified By: DANIEL PIPKIN
HQ OPS Officer: HOWIE CROUCH | Notification Date: 01/09/2016
Notification Time: 07:04 [ET]
Event Date: 01/09/2016
Event Time: 02:37 [CST]
Last Update Date: 01/09/2016 |
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(2)(iv)(B) - RPS ACTUATION - CRITICAL
50.72(b)(3)(iv)(A) - VALID SPECIF SYS ACTUATION | Person (Organization):
VIVIAN CAMPBELL (R4DO) |
Unit | SCRAM Code | RX CRIT | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
1 | A/R | Y | 100 | Power Operation | 0 | Hot Shutdown |
Event Text
AUTOMATIC REACTOR SCRAM ON MAIN STEAM ISOLATION DUE TO ELECTRICAL FAULT
"On 1/9/16 at 0237 [CST], River Bend Station sustained a reactor scram during a lightning storm. An electrical transient occurred resulting in a full main steam isolation [MSIV] (Group 6) and a Division II Balance of Plant isolation signal. During the scram, level 8 occurred immediately which tripped the feed pumps. A level 3 signal occurred also during the scram. Subsequent level 3 was received three times due to isolated vessel level control. The plant was stabilized and all spurious isolation signals reset, then the MSIVs were restored. The plant is now stable in Mode 3 and plant walkdowns are occurring to assess the transient."
During the scram, all rods inserted into the core. The plant was initially cooled down using safety relief valves. Offsite power is available and the plant is in its normal shutdown electrical lineup. |
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