Support Request: Lag in SMP when nuclear reactor is running.

I have a MARK 1-1-SUC reactor on an SMP server, here is a link to the design.
http://www.talonfiremage.pwp.b…p2st2pjshtoakpgl7oh1pan28

When I run it I get huge amounts of lag and drop every few minutes with various errors, primarily End of stream, Internal exception: java.net.SocketException: connection reset, and Internal exception: java.IOException: Not enough data.

Mods installed on the server include redpower 2, buildcraft, industialcraft 2, advanced machines, and additional pipes.