Your link is same as first post link. As fa as i know, ice blocks cool reactor hull only. Components are able to cool by themsef. If there are HDs in reactor, they will transfer heat from components to cooled hull, which can be than further cooled by ice, so ice helps components to cool faster.
as i stated, the link is taken from the first post.
ice blocks cool hull heat only, so making it posible to cool down the exces 1.3 heat/tick which has build. the only thing i am unsure of is the end of each cycle inside of the reactor planner.
it states, 67% hull heat. this is from 0 hull heat to start off with. might be the bug stated earlier although i am not sure.
edit: note i am only staking theoretic posibilities right now, alot is yet to be comfirmed by actual testing ( my test world is doing so right now ) i might have results tomorow