
nancy.. alittle history on SCRAM... in the very early days of the nuclear there were control rods and they were held by basically ropes over a pile... .there was a man stationed at the ropes going thru an area where he could chop the ropes and let the rods drop... so. .they coined the work .. SAFETY CONTROL ROD AXE MAN..... later some refered to it as .. STOP CRITICAL REACTION AVOID MELTDOWN... and today it's just the nuclear term for using the safety rods (not control rods) through a higher speed drive to stop the criticality and take the reactor to a sub critical state.
by dean 5/23/2011 1:39:02 PM

the control rods were held that way
by dean 5/23/2011 1:39:21 PM

ty RBeaner opening it now..
by dean 5/23/2011 1:41:18 PM

I saw that UK HA HA .. GOOD ONE
by dean 5/23/2011 1:41:33 PM

ONE POINT.. the "safety rods' must keep the reactor sub critical .. such that the reactor cannot go critical by withdrawing control rods only ... they have to work on control and safety rods during outages at times but the TECHINCAL SAFETY REQUIREMENTS dictate what kind of shutdown margin is needed
by dean 5/23/2011 1:42:55 PM

UK nuclear was something else in the beginning.. the original study on critical mass, ,well in the early days, a man was at a table, with a shielded glass in front of him and he moved two masses of fissile material slowly together and they reached a small critical mass and flashed,.... DUH...
by dean 5/23/2011 1:44:09 PM

Acronym
BWR – Boiling Water Reactor
CV – Containment Vessel
ECCS – Emergency Core Coolant Syatem
EDG or DG – Emergency Diesel Generator
HPCI – High Pressure Coolant Injection
LPCI – Low Pressure Coolant Injection
PCV – Pressure Control Vessel
RCIC – Reactor Core Isolation Cooling
RPV – Reactor Pressure Vessel (same as PCV)
SORV –Safety Operated Relief Valve
by dean 5/23/2011 1:54:34 PM

Nancy.. I am going to get my hands on a full acronym list for BWR reactors then you can add to that..
by dean 5/23/2011 2:13:24 PM

We had earlier a glossary of nuclear terms that is good to have also @ Nancy
by dean 5/23/2011 2:13:49 PM