I just added the Nucular mod to an existing game containing Angel's Refining, and the uranium recipes added by Angel's Refining did not automatically unlock.

I had to run this command manually in order to enable them:

for _, force in pairs(game.forces) do
if force.technologies["slag-processing-1 ...

When joining a multiplayer game with only some or none of the mods you currently have enabled, have the game automatically disable the mods that are not compatible with the server.

Example:
PC has the following mods:
Mod A1
Mod B2
Mod C3

Server 1 has the following mods:
Mod C3

Server 2 has no ...