[Nick]

It sounds like you’ve done a good job of chacking teh ACC, but when I say check upstream I actually mean in the steam bypass lines, any drains leading to the ACC, etc. Basically anything that connects to the ACC and follow it to its source to check a valve isn’t left openm, a flange has become loose, etc.

In my experience, air leaks are as likely to be in the BOP piping and equipment that connect to the ACC rather than the ACC itself.

[Nick]

Have you checked upstream of the ACC for air ingress leaks with Helium? Often the ACC is thought to be the source of the leak, yet it is often something upstream of it where the air leak is. If you haven’t done so already, think of helium testing upstream.

[Author]

Posts