Statements released by the coalition of law enforcement agencies behind the sting detail allegations that the nun leveraged her position as a volunteer at the prison.
The court heard Sanders raped and abused his first victim - a girl - on a number of occasions, with his actions having a devastating impact on her.He also used paganism, along with mentioning demons, spirits and ghosts as an excuse to abuse her.
Another victim, a boy, was given chocolate by Sanders and told the sexual abuse was their "little secret".A third victim, a girl, was aged under 10 when she was abused by Sanders, the court heard.Det Con Mike Smith, of Devon and Cornwall Police, said Sanders manipulated his victims for "his own twisted sexual gratification" and showed no remorse.
Mr Smith said: "Stephen Sanders is a calculating rapist and child sex offender who targeted three young victims over a number of years."It is thanks to their immense courage in speaking about what happened, and giving evidence in court, that Sanders is finally behind bars."
Fourteen people have been arrested in Spain and Portugal in a series of raids targeting a €1tn (£828bn) criminal, money-laundering network working with gangs across Europe.
Most of the suspects, detained last month, are Russian nationals, according to EU law enforcement agency Europol.In Wales, the problem was found to be worst in towns and cities - with more than 35% of urban areas seeing "unacceptable" levels of litter.
There was also a 286% increase in the number of the most dirty streets, graded "D" for cleanliness.Smoking-related litter and food and drinks packaging were the most common types of litter found.
In Cardiff, where the council spends more than £7m a year on street cleaning, the worst performing "D" streets were found in some of the city's most deprived neighbourhoods, including Ely, Roath, Grangetown and Splott.Splott resident Malcolm Davies said the level of litter in and around his home was "just a nightmare".