Posted on 12/24/2010 9:11:34 AM PST by SeekAndFind
The Iranians ability to replace, repair and reload these machines is probably very limited and will put a huge crimp in their plans.
As for Mossad, they might have got the virus in there, but I will bet money to donuts that the plan started over here and was financed and run by the USA.
And that OP started in the Bush administration.
When you include the Democrat Party and idiots voting, it moves it into the miracle category.
The centrifuges spin around 80,000+ rpms the only thing that can destroy them is weight imbalance that becomes profound far beyond terminal speeds.
That has happened when a tech did not thoroughly clean a fingerprint off. Traces of cleaning solvent remained and caused a wobble at terminal speed during testing.
The reason for the destruction of the Iranian centrifuges is well known in technical circles. Iran's yellow cake was heavily contaminated with molybdenum that is nearly the same weight as uranium but a slightly larger atom and keeps plugging up the extractor tubes.
They are very expensive and easily destroyed by imbalances and over-speed that's why they are tested at several times the operating rpms and balanced to safe limits.
Shutdown circuits that kill power are redundant and on completely different control systems for a reason, to make sure that they cannot be sabotaged by a single event. There are extensive critical path (CPM) studies done to make sure one fault cannot cause another and/or defeat independent safety devices.
That process is first year engineering studies and the Iranians are easily capable of seeing the risks.
The outside of the chamber rotates at over the speed of sound and the harmonics are easily monitored. Runaways are impossible because the power required is not available through the inverters. All vehicles can only go so fast. If they are tested for balance at maximum inverter power and run smoothly, that's it, they can be overdriven without the inverter popping a circuit due to over amperage.
It is time to let this line of media stories about Stuxnet just die.
Don’t think the Isrealis survive on PR, rather security success the old fashion way, they work at it. If anything this whole thing is under-blown by both Isreal and the camel-jockeys.
I am just tired of them over driving this Stuxnet story into technical silliness. It's success is due to the herd mentality of ignorant readers. Israeli PR takes advantage of the issue and thinks they can pass any bs off because it may be too technically complex to be easily challenged.
Ain't gonna happen on my watch.
My final point on this issue is that Siemens does make the PLC controllers but not the power inverters that power the centrifuge “motors”. The inverters only produce a limited amount of power, no matter how hard you step on the foot pedal, a car can only go so fast.
Thank you, I went and looked up some of the info on this kind of centrifuge and apologize.
5.56mm
They act like America is a bunch of hicks that should automatically fall inline with the bs de jure that they constantly serve up.
As much as I am loyal to Israel, I can't completely believe anything they say anymore.
I understand the skepticism, but there is some smoke there, so there might be fire. There has been a hunt to hire certain types of nuclear scientists by the Iranian authorities very recently. If there had been a “minor” upset to their plans, I would not understand the fervor behind their search.
I understand the skepticism, but there is some smoke there, so there might be fire. There has been a hunt to hire certain types of nuclear scientists by the Iranian authorities very recently. If there had been a “minor” upset to their plans, I would not understand the fervor behind their search.
“The inverters only produce a limited amount of power, no matter how hard you step on the foot pedal, a car can only go so fast.”
Your statement is untrue!
Inverters convert 50 or 60 Hz power into DC power which is stored in a capacitor and chopped to reconstitute the power output to anything from 0 - 1000 Hz.
Inverters can EASILY be reprogrammed to to rapidly change the speed to 200% to 500% faster than normal in addition the safeties voltage, speed and current limiting reside in the inverter and can also be readily changed via software and changed back immediateley after “the event” just like nothing happened.
See ABB ACH 800 literature here:>> http://www05.abb.com/global/scot/scot239.nsf/veritydisplay/cb07980e2fd375bc8525733f004422cc/$File/3AUA489002B5311_ACH400_00_UM_REVE.pdf
read starting on page 103
Siemens controllers talk to ABB and other drives what you call “power inverters” all day long all over the world.
maybe your is a different world.
Lurking’
So what exactly was the purpose of Stuxnet?
What was it designed to accomplish and did it do what it was supposed to do?
Did it atleast mess up a huge batch of their enriched uranium?
Maybe we need to ask the creators....if we can find them....
Maybe we need to ask the creators....if we can find them....
Who knows - maybe only 500 but it's still good news.
Per a previous post, centrifuges don't run on washing machine type motors. AC power is converted to DC and pulsed to an electromagnetic field "motor".
The Siemens PLC determines the speed of that pulse and that is where the Stuxnet worm was injected into code, the PLC code, not the inverter program.
The inverter "downstream" of the PLC can get all kinds of signal commands, but the highly specialized inverters on centrifuges have a very limited amount of pulses they can respond to.
No matter how hard you stomp on a tractor's accelerator it will only speed up as fast as the governor will allow.
The inverter's used, in order to be very stable and predictable and steady, are "choked" to ignore out of parameter signals.
Also, there are independent sensors that monitor and track and print out reports on the centrifuge's speed. That monitoring sensor system is not connected to the PLC or the inverter and reports exactly what happens, constantly. There is no "just like nothing happened". Any change is recorded and alarms triggered for any unplanned event.
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