Nefarian- Chromatic Prototype - Solar Beam?

[Similyn]

I've been reading up on the Nefarian encounter so that I can be prepared for the fight when we get to it. I read about the Chromatic Prototype and the need for them to be interrupted and wondered if I (boomkin) cast Solar Beam on it, will it keep it from casting it's Blast Nova for the duration of Solar Beam (10 seconds, or 15 seconds glyphed)? Or will it just interrupt the first cast? According to the solar beam description, it should interrupt and silence any enemies under it for the duration of the beam. I just want to make sure this works on this encounter as I've come across some npc's who are immune to it.

[Rukentuts]

It says it should interrupt, however the silence won't work. If you don't know 100% if the interrupt will work, don't get put in the rotation (1 min CD won't really fit into the rotation anyway).