I remember when we had a GE Triga Mark 3 reactor at my company, 1 MW cont. thermical power, there was a feature to shoot out the control rods by compressed air in order to generate a high energy impulse of about 2 MW for a very short time (this reactor was only installed to generate radiation for research purposes). This caused a very high gamma radiation pulse together wit a blue Cerenkov flash. Lacking the control rods, the power quenched itself and stabilized at about 4 MW for which the cooling system was sufficiently provided. As I remember, this was done for public demonstration quite frequently. Peter
Am 02.05.2013 21:04, schrieb Gregg Eshelman: > --- On Thu, 5/2/13, dave <dengv...@charter.net> wrote: > >> SL1 was caused by a deliberate act of an employee who wanted >> to >> embarrass his boss. He pulled a control rod ... or several >> and got pined to the roof by the steam. They buried his coffin >> encased in several tons of lead. > What caused it was one shift was doing maintenance on the control rod motors > then the next shift's job was to reinstall them. > > The reactor had one large control rod and some smaller ones. The rods were > inadequate to control it so additional strips of boron were attached to them, > making a very close fit in their channels. > > The heat and cooling water caused the "poison strips" to swell and flake, > frequently jamming the rods. > > The official investigation results were that the main rod was stuck, one man > stood atop the containment vessel to get a good grip on it to pull it up far > enough to connect it to the motor drive. It snapped loose, came up all the > way and the poor sod didn't even have enough time to think about beginning to > think "oh crap". > > Other reactors around the world were checked to see if there were any with a > design that could fail in the same way by pulling out one rod. Only one was > found, in Iceland. The fix was simple, put a safety stop on the thing so that > one rod couldn't be pulled up too far. > > ------------------------------------------------------------------------------ > Get 100% visibility into Java/.NET code with AppDynamics Lite > It's a free troubleshooting tool designed for production > Get down to code-level detail for bottlenecks, with <2% overhead. > Download for free and get started troubleshooting in minutes. > http://p.sf.net/sfu/appdyn_d2d_ap2 > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > ------------------------------------------------------------------------------ Get 100% visibility into Java/.NET code with AppDynamics Lite It's a free troubleshooting tool designed for production Get down to code-level detail for bottlenecks, with <2% overhead. Download for free and get started troubleshooting in minutes. http://p.sf.net/sfu/appdyn_d2d_ap2 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
