The Archdiocese of Philadelphia brought only a third of the abuse or misconduct allegations that led to this week's unprecedented suspension of priests to the independent review board it had long promoted as a pillar of its reform, according to the panel chair.

Ana Maria Catanzaro, who heads the eight-person board, confirmed that its members had previously weighed abuse accusations against seven of the 21 priests placed on leave this week but had concluded there wasn't enough evidence at the time to recommend their removal.

Catanzaro also said the board urged church leaders "a number of times" to suspend accused priests during the investigation, but that the archdiocese had ignored that recommendation.

"Our priority has always been to keep kids safe," she said.

Catanzaro declined to identify the seven priests or discuss details of the allegations against them.

Still, the admission was likely to stir new questions about the suspended priests' activity, why the review board never heard all their cases, and the archdiocese's commitment to rooting out abuse and protecting children.

On Tuesday, Cardinal Justin Rigali announced that the 21 priests would be placed on administrative leave - prohibited from distributing sacraments or living in parish residences - pending a reexamination of old accusations against them.

The archdiocese declined to publicly name the priests or describe the complaints, except to say they involved sexual abuse or inappropriate behavior around minors.

The Inquirer and other news outlets have published their names and parishes.

Donna Farrell, a spokeswoman for the archdiocese, declined Thursday to discuss cases before the review board or its process, but said that the suspensions "represent a broad range of complaints - from allegations of sexual abuse to boundary issues or inappropriate behavior."

Farrell also said the archdiocese is "actively engaged" with the review board and considering its request to expand the kinds of cases it reviews.

The suspensions followed a grand jury report last month that accused the archdiocese of failing to reform, and of keeping 37 priests in active ministry despite allegations against them.

The grand jury took particular aim the review board, which it said had ignored "very convincing evidence" of abuse or misconduct, or at least sufficient evidence to suspend a priest pending an investigation

Days after that report, the archdiocese suspended three priests who the grand jury said had been credibly accused but left in their posts.

Gina Maisto Smith, a former sex-crimes prosecutor hired by the archdiocese to reexamine the other cases, recommended the 21 new suspensions this week.

Smith cleared another eight after reviewing the allegations against them. Of the rest, one is no longer a priest, two are sick and no longer in active ministry, and two work in religious orders outside the Philadelphia area. Archdiocesan officials have notified the superiors in their orders.

The review board dates to 2003, one of a raft of reforms U.S. Bishops ordered in response to the sex abuse scandal roiling the church.

The Philadelphia board, which includes Catholics, non-Catholics and many with experience in child welfare, meets quarterly. Its cases are handpicked by the archdiocese, and are typically abuse claims serious enough to warrant a look but too old or flawed for prosecutors to investigate.

Board members don't take testimony, but instead review transcripts of interviews and other information supplied by the alleged victim, archdiocesan officials, and the accused priest, if he chooses, or his representative. The board votes on whether there's sufficient evidence to recommend action against the priest.

Since 2003, the board reviewed 61 cases. In 37 cases, or nearly two-thirds, it found the allegations credible enough to recommend a priest's removal, Catanzaro said. One recommendation is still pending, she said.

Among the rest, seven involved the priests placed on leave this week. Three more were claims against priests who have since retired. The others are dead or no longer in ministry, Catanzaro said.

The review board's purview is narrow, she said. It considers only cases involving sexual abuse, not general misconduct or boundary issues, such a priest striking a child, making a lewd comment or drinking in front of children.

It also has no authority to examine allegations against priests in religious orders - which staff many of the archdiocesan schools - because those priests aren't under the cardinal's authority. And it doesn't review allegations pending in the courts.

One case that highlights that approach stemmed from a 2009 lawsuit filed by a former student at St. John Neummann High School in South Philadelphia. In the suit, the plaintiff said Mgsr. Michael Flood sexually assaulted him when Flood taught there in the late 1970s.

After the suit was filed, the archdiocese announced that Flood had denied the allegation and would retain his post as pastor of St. Luke's in Glenside, Montgomery County, but refrain from "unsupervised ministry" to children.

But is also called an archdiocesan investigation "impossible" because the alleged victim did not identify himself in the lawsuit and the case was in the court system.

Flood was one of the priests placed on leave Tuesday. The lawsuit is pending.

Catanzaro said she was told that Smith, the ex-prosecutor reviewing the old cases, was given more information and used broader standards to evaluate the priests than the review board had been told to use. That's a good thing, she said.

"The more eyes that look at the available evidence, the better," she said.