[Sneap] Information request concerning High pressure safety system in electrostatic accelerators

[Chris Westerfeldt]

Greetings Augusto,
    We also built our own gravity/spring sealed ³blow off valves² and
installed them at the exit of our
K-3000 and also both ends of our FN.  We feel that a catastrophic failure of
accelerator tube is unlikely but
it is possible to develop a leak at a failing glue joint in a tube ­ or more
likely at the rf ion source in a single-ended machine
that would trip the vacuum pump interlocks thereby causing the pump gate
valve to close.  These valves would limit the fairly
slow pressure build up in the beamline to a couple of psi.  We made the
valve plates as large as possible toward this end.
 Regards,
- Chris
-- 

Chris R. Westerfeldt
Research Scientist / T.U.N.L. Radiation Safety Manager
Duke University Physics Department &
Triangle Universities Nuclear Laboratory
Science Drive, Box 90308
Durham, NC  27708-0308
Tel: (919) 660-2600
Fax: (919) 660-2634
Email: Cwest at Tunl.Duke.Edu



From: Augusto Lombardi <augusto.lombardi at lnl.infn.it>
Reply-To: Symposium of Northeastern Accelerator Personnel
<sneap at tunl.duke.edu>
Date: Wed, 18 Mar 2009 09:40:40 +0100
To: <sneap at tunl.duke.edu>
Subject: [Sneap] Information request concerning High pressure safety system
in electrostatic accelerators





    Dear Sneapers,

I am Augusto Lombardi from Legnaro and some of you know me already.
I am now responsible for the operation of the two single stage machine in
Legnaro the AN 2000 and the CN 7 MeV.

The questions I have for the community is:

1.     There are any risk analysis and/or records concerning the high
pressure hazard due to the column breakdown or any other accident that put
in comunication the high pressure vessel with the beam vacuum pipe? (more
than 10 bar vessels versus vacuum)
2.  
3.     There are any safety systems for this kind of accident?  (we do have
break disks and spring loaded valves but ....)

    Thank you all for the help.
    greetings
    Augusto.


_______________________________________________
Sneap mailing list
Sneap at daytona.tunl.duke.edu
http://daytona.tunl.duke.edu/mailman/listinfo/sneap

-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://daytona.tunl.duke.edu/pipermail/sneap/attachments/20090319/f9a170aa/attachment.html