The case follows similar action taken against World Rugby in the UK
An undisclosed number of former rugby players are taking legal action against the IRFU.
The case is in relation to serious brain injuries sustained during their playing careers.
The legal case follows similar proceedings in the UK - where a group of professional and semi-professional players took action against World Rugby, the Rugby Football Union and the Welsh Rugby Union.
The players argue that the sport's governing bodies failed to take reasonable action to protect players from permanent injury cause by repetitive concussions.
The Irish Times reports the proceedings will be issued before October.
The case will be taken by Dublin-based solicitors Maguire McClaffey LLP, who specialise in litigation and personal injury law.
In the UK, former Wales captain Ryan Jones is claiming against governing bodies.
He revealed earlier this month that he was diagnosed with early-onset dementia and possibly CTE.
CTE (Chronic traumatic encephalopathy) is a progressive brain condition that's thought to be caused by repeated blows to the head and repeated episodes of concussion.
Jones told the Sunday Times earlier this month:
"I feel like my world is falling apart.
"I am a product of an environment that is all about process and human performance. I’m not able to perform like I could, and I just want to lead a happy, healthy, normal life.
"I can’t train harder, I can’t play the referee, I don’t know what the rules of the game are anymore."
