Search results
Results from the WOW.Com Content Network
Immediately after the earthquake, the remaining reactors 1–3 shut down automatically, and emergency generators came online to control electronics and coolant systems. However, the tsunami following the earthquake quickly flooded the low-lying rooms in which the emergency generators were housed.
However, the tsunami following the earthquake quickly flooded the low-lying rooms in which the emergency generators were housed. The flooded generators failed, cutting power to the critical pumps that must continuously circulate coolant water through a nuclear reactor for several days in order to keep it from melting down after being shut down.
It is also the name that is given to the manually operated kill switch that initiates the shutdown. In commercial reactor operations, this type of shutdown is often referred to as a "scram" at boiling water reactors, a "reactor trip " at pressurized water reactors and "EPIS" at a CANDU reactor. In many cases, a scram is part of the routine ...
The Fukushima Daini Nuclear Power Plant (福島第二原子力発電所, Fukushima Daini (pronunciation ⓘ) Genshiryoku Hatsudensho, Fukushima II NPP, 2F) is a nuclear power plant located on a 150 ha (370-acre) site [ 1 ] in the town of Naraha and Tomioka in the Futaba District of Fukushima Prefecture, Japan. The Tokyo Electric Power Company ...
A core meltdown accident occurs when the heat generated by a nuclear reactor exceeds the heat removed by the cooling systems to the point where at least one nuclear fuel element exceeds its melting point. This differs from a fuel element failure, which is not caused by high temperatures. A meltdown may be caused by a loss of coolant, loss of ...
Upon detecting the earthquake, all three operating reactors (units 1, 2, and 3) automatically shut down. Due to expected grid failure and damage to the switch station as a result of the earthquake, the power station automatically started up the EDGs, isolated the reactor from the primary coolant loops, and activated the emergency shutdown ...
Three Mile Island Unit 1. The Three Mile Island Unit 1 is a pressurized water reactor designed by Babcock & Wilcox with a net generating capacity of 819 MW e. The initial construction cost for TMI-1 was US$400 million, equal to $2.47 billion in 2018 dollars. [31] Unit 1 first came online on April 19, 1974, and began commercial operations on ...
An LPCI is an emergency system which consists of a pump that injects a coolant into the reactor vessel once it has been depressurized. In some nuclear power plants an LPCI is a mode of operation of a residual heat removal system, also known as an RHR or RHS but is generally called LPCI. It is also not a stand-alone valve or system.