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  • OT: Scram

    A bit of history.

    We have all heard of a reactor being scrammed or scramming a rector. What does it actually mean. Back in the 30’s when they first reactor was built at the Chicago university it had a boron tipped rod suspended over it by a rope with a man holding an axe ready to cut the rope and drop the rod to stop the reaction. Hence the term SCRAM.


    Single Control Rod Axe Man

    Don't say you didn't learn something today. Well unless you already knew it.

    The shortest distance between two points is a circle of infinite diameter.

    Bluewater Model Engineering Society at https://sites.google.com/site/bluewatermes/

    Southwestern Ontario. Canada

  • #2
    Didn’t know that, a friend of mine was an engineer designing reactor stuff, she had a square tube about 10” long that was crushed like a vienetta ice cream block, apparently these things go behind the rod when it’s rammed in, I thought it was fascinating at the time, now I think it’s bloody scary
    mark

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    • #3
      That is probably a "backronym"...... created later to cover the situation. The use of the term as equal to "absquatulate" may also have preceded it.
      2801 3147 6749 8779 4900 4900 4900

      Keep eye on ball.
      Hashim Khan


      It's just a box of rain, I don't know who put it there.

      Comment


      • #4
        Originally posted by loose nut View Post
        ...We have all heard of a reactor being scrammed or scramming a rector. .
        We have? How do you know I have heard of that?
        Unless we are secret lovers and I talk in my sleep?

        -D
        DZER

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        • #5
          Originally posted by Doozer View Post

          We have? How do you know I have heard of that?
          Unless we are secret lovers and I talk in my sleep?
          -D
          Now Doozer, let's not be cranky.

          Comment


          • #6
            I've heard of the term- I gave it two meanings, one as an acronym which I didn't know, and the other meaning to 'get the heck out of there, it's going to blow'
            I seldom do anything within the scope of logical reason and calculated cost/benefit, etc- I'm following my passion-

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            • #7
              I understood that the CANDU reactor automatically drops reaction blocking rods on power failure, kinda like a dead man switch - unlike the Japanese one that caused grief a few years back when the tsunami cut the power to it...
              "A machinist's (WHAP!) best friend (WHAP! WHAP!) is his hammer. (WHAP!)" - Fred Tanner, foreman, Lunenburg Foundry and Engineering machine shop, circa 1979

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              • #8
                You mean the dead man switch died?
                mark costello-Low speed steel

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                • #9
                  Yea, cut the rope and stop the reactor from going critical. Reactor time to go critical = micro seconds or less. Reaction time of man with ax plus time needed for the rod to fall = many seconds.

                  Guess who/what wins.

                  Annnnnnnnd it's Reactor by a million or more!

                  and

                  Ax man = TOAST!

                  There is just no way that the ax man could react fast enough to stop an accident if it got out of control. And he probably knew that.
                  Paul A.
                  SE Texas

                  And if you look REAL close at an analog signal,
                  You will find that it has discrete steps.

                  Comment


                  • #10
                    Yet another horse sh!t OT thread.
                    https://public-blog.nrc-gateway.gov/...he-scram-myth/

                    Comment


                    • #11
                      Originally posted by reggie_obe View Post
                      That's about what I figured..... the word already existed and meant what it means, the other deal was a "backronym".
                      2801 3147 6749 8779 4900 4900 4900

                      Keep eye on ball.
                      Hashim Khan


                      It's just a box of rain, I don't know who put it there.

                      Comment


                      • #12
                        Only thing I know about SCRAM is a SCRAM Jet. And those are real.

                        Or, the fukin cops are here, scram!!

                        My friends were always keen to the police lol. JR
                        My old yahoo group. Bridgeport Mill Group

                        https://groups.yahoo.com/neo/groups/...port_mill/info

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                        • #13
                          I like the term "backronym"!

                          Only one I know is from the oilfield; I've had people tell me that the word PIG (the thing we pump through lines to clean them etc) stands for Pipeline Inspection Gauge. Er, no, it's called a pig because it's sort of pig-shaped. Maybe also because they can be a pig to remove when they get stuck. The backronym came later.

                          Ian
                          All of the gear, no idea...

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                          • #14
                            I love Scram but sometimes the key breaks off when I try to open the can. But fried Scram is really good. Especially if you haven't eaten for a few days.
                            Location: The Black Forest in Germany

                            How to become a millionaire: Start out with 10 million and take up machining as a hobby!

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                            • #15
                              Originally posted by Black Forest View Post
                              I love Scram but sometimes the key breaks off when I try to open the can. But fried Scram is really good. Especially if you haven't eaten for a few days.
                              Lovely Spam, wonderful Spam....

                              https://www.youtube.com/watch?v=Gxtsa-OvQLA

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