"We're asking the pope to do something very simple: put individuals to lead your summit that have not covered up for child sex crimes," said Peter Isely, a self-identified survivor and spokesman for the group Ending Clergy Abuse (ECA).
Survivors' advocates have long accused church officials of slow-walking abuse investigations and failing to disclose all allegations.
Marchant said her abuser was allowed to remain a priest for almost two decades after she first reported him.
"The church has a history of minimizing and denying the undeniable pain and horror of being sexually abused by a priest," said Marchant, who is now a therapist helping other clergy abuse survivors.
'NO DOUBT' MORE TO DO
The new demands came two weeks after the top prosecutor in the Midwestern state of Illinois, where Chicago is located, revealed hundreds of previously undisclosed allegations of clergy abuse.
In a scathing report, Illinois Attorney General Lisa Madigan said church officials mishandled investigations and failed to inform law enforcement of all accusations.
More than 500 additional accused clergy were uncovered by state investigators within months of looking into dioceses' records, according to Madigan, far more than the 185 names previously disclosed.
Cardinal Cupich acknowledged that more reforms were needed.
"There can be no doubt about the constant need to strengthen our culture of healing, protection, and accountability," he said in December statement.
The scale of the apparent cover-up in Illinois eclipsed the findings of a grand jury in Pennsylvania, which in August alleged more than 300 suspected predator priests and more than 1,000 victims had been concealed for decades.
In announcing the February meeting to discuss the abuse crisis, Pope Francis urged bishops to "reach out and visit with victims of sexual abuse... to learn first hand the suffering that they have endured."