The three top banking executives jailed for their role in the Anglo conspiracy are likely to spend their jail time in the Training Unit attached to Mountjoy Prison.
John Bowe (52); Willie McAteer (65), of Greenrath, Tipperary Town, Co Tipperary; and the former group chief executive of Irish Life and Permanent Denis Casey (56) are deemed low-risk prisoners.
The trio were processed in the main jail on Friday, but they are now in the more comfortable Training Unit, where more "hardened" prisoners are generally moved to as their sentences are coming to an end.
McAteer was given a three-and-a-half year sentence, Casey - of Raheny in North Dublin - received two years and nine months, and Bowe was handed two years for their roles in the €7.2 billion fraud.
Judge Martin Nolan told Bowe - of Lindsay Road in Glasnevin - the lower sentence was because his role was "lesser" and he was not a board member.
The three spent one night in the main jail's single cells but were moved on Saturday.
"These guys are not likely to be any sort of a threat in prison," said a jail source.
"By their nature they'll be anxious to keep the heads down and get on with things," the source added, indicating that the bankers won't need the same level of security as other prisoners.
"But they will still be on a strict regime and it's not like they are being segregated from 'lifers' or more hardened criminals - there are a number of them in the unit coming to the end of their sentences."
The source said the prisoners could theoretically be moved at a later stage to a more open prison environment, such as Shelton Abbey in Co Wicklow or Loughan House in Co Cavan. However, such a move might make it harder for family visits and so it was more likely they would stay in Dublin.
"While they are in prison they will be encouraged to engage in training or courses," added the source.
"They won't be forced to do them but often prisoners engage in these activities because the time passes quicker when your mind is occupied with something, otherwise you spend a lot of time in your cell."
The Training Unit is seen by inmates as a more comfortable and modern place than the older main prison.
The three men now have 26 days to lodge a notice of intention to appeal the sentences.
Cells are unlocked at 8.15am every morning in the Training Unit and the prisoners go and pick up their breakfast of cereal or toast, with fruit, before going back to their cells.
Inmates spend more time out of their cells in the contained unit than those in the main prison.