That means the cooling failed and the reactor automatically shut down.
Um, no that’s not what it means. It means Safety control rod axe man. In other words an emergency shut down of a reactor by inserting the control rods to stop the fission process.
There are many conditions of a reactor that may warrant a SCRAM. Stating a coolant loss issue without supporting facts is fear mongering.
MANUAL SCRAM FOLLOWING LOSS OF REACTOR CLOSED COOLING
"At 1322 PDT on Monday, March 28, 2016, Columbia Generating Station was manually scrammed from 100% thermal power due to the loss of Reactor Closed Cooling (RCC). Manual scram of the unit is procedurally required upon loss of RCC. The cause of the loss of RCC is being investigated.
"Regulation 10 CFR 50.72(b)(2)(iv)(B) requires reporting within 4 hours of any event or condition that results in actuation of the Reactor Protection System (RPS) when the reactor is critical.
"All control rods were fully inserted. Valve RWCU-V-4 automatically closed upon high water temperature due to loss of RCC flow. No other safety system actuations were reported. All systems operated as expected. Reactor decay heat is being removed via bypass valves to the Main Condenser. The station is in normal shutdown electrical lineup.
"The NRC Resident Inspector has been informed."
No safety/relief valves lifted and no emergency core cooling systems injected following the reactor scram.