I called the inspectors. Basically two feet disappeared from the condensate tank. The normal level is 26 feet. He doesn't know the amount of water. It was a bypass line around a main valve in the condensate system. It was a weld that leaked. All the water was collected in the condenser sump area and process back in rad waste. I believe the condensate pressure is 400 psi. The scram went well, but some communication issues surrounding the control room.
SUGAR LAND, TEXAS--April 4, 2017--Researched by Industrial Information Resources (Sugar Land, Texas)--Grand Gulf Nuclear Power Station, located in Port Gibson, Mississippi, tripped offline its 1,259-megawatt (MW) Unit 01 reactor due to a steam-piping leak. System Energy Resources Incorporated (Jackson, Mississippi), a subsidiary of Entergy Corporation (NYSE:ETR) (The Woodlands, Texas), holds a 90% ownership and leasehold interest, and South Mississippi Electric Power, holds a 10% ownership interest.A Surry level event:
(UCS)
Surry Nuclear PlantI don't get it, if leaked inside the turb or reactor building, there would be electrical shorts and fires all over the place. If outside, they would have to make a report radioactive contamination outside same building...
On December 9, 1986, the 18-inch diameter pipe supplying water to main feedwater pump A for the Unit 2 reactor at the Surry nuclear plant in Virginia ruptured. This feedwater pipe provided water to the steam generators where it absorbed the heat produced by the reactor core. The pipe contained water at 370°F and pressurized to 450 pounds per square inch. The water flashed to steam as it jetted from the broken pipe ends, scalding eight workers installing insulation nearby. Four workers died from their injuries. The steam also tricked the fire detection system into actuating the fire suppression systems. Water from fire sprinklers shorted out computer card readers at locked doors, impeding responders trapped on the wrong side of doors that could not be opened with their keycards. Emergency systems unaffected by the broken pipe protected the reactor core. Investigation revealed that the pipe, which was installed with a wall thickness of 1/2-inch, had thinned to about 1/4-inch by erosion from the water rushing through it. The section that ruptured was an elbow where the pipe bent, forcing an accelerated erosion rate.
They would have to enter a emergency classification declaration...
Reposted from 4/4
April 5
Wait a minute, the enormous condensate storage lost 24 feet of water and they had to scram on a condensate emergency procedure. Did anyone drown in the plant? Is it a instrumentation accuracy issues, did all the water leak inside the plant or outside the plant.
The condensate storage tank are notorious for being highly radioactively contaminated especially if lots of fuel failure.
The silence is deafening loud!!!!
This is makeup water for all reactor leaks...
| Power Reactor | Event Number: 52663 |
| Facility: GRAND GULF Region: 4 State: MS Unit: [1] [ ] [ ] RX Type: [1] GE-6 NRC Notified By: DAVID BURRUS HQ OPS Officer: JEFF HERRERA | Notification Date: 04/04/2017 Notification Time: 06:57 [ET] Event Date: 04/04/2017 Event Time: 00:10 [CDT] Last Update Date: 04/04/2017 |
| 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): MICHAEL VASQUEZ (R4DO) |
| Unit | SCRAM Code | RX CRIT | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
| 1 | M/R | Y | 75 | Power Operation | 0 | Hot Shutdown |
| MANUAL REACTOR SCRAM DUE TO CONDENSATE LEAK "At 0010 [CDT], 04/04/2017, the reactor was manually scrammed from approximately 75 [percent] core thermal power due Condensate Storage tank level lowering to 24 feet. All control rods fully inserted and all systems actuated and operated as designed. No safety relief valves actuated. Reactor level and pressure are currently being controlled within normal bands. RCIC [reactor core isolation cooling] was manually initiated for level control. "This event is reportable under 10CFR50.72(b)(2)(iv)(B) for the reactor trip and 50.72(b)(3)(iv)(A) for the manual start of the reactor core isolation cooling system." The cause of lowering level was a condensate pipe leak. Decay heat is being removed via steam dumps to the condenser. The electrical grid is stable and supplying plant loads. The licensee has notified the NRC Resident Inspector. |
But no coast down, that could be because of the four month "training" shutdown
Could they be entering a regular outage? .
Today:
| Grand Gulf 1 | 0 |
yesterday@100% power
Google Popperville, Grand Gulf
There is no event report...must be shutdown intentionally without a trip.
Last time they did this, they went into the 4 month shutdown over licensed operator incompetence.
These guys got a disgusting capacity factor.
I predicted their problems were just beginning.
No comments:
Post a Comment