This means the Phuket facility contains no illicit mobile telephones, no drugs, and no weapons, he told Phuket's media.
Although there are 1845 inmates in a prison built for less than half that number, Commander Rapin said today that the prison met ''a good standard'' in terms of quality of life.
Less than 40 of the inmates are foreigners. Eighty percent of the inmates are there for drugs offences.
Commander Rapin has a reputation as a reformer rather than a punisher, and has introduced or encouraged novel ideas aimed at encouraging prisoners to return to normal life.
There's a prison car wash and a traditional Thai massage centre, regular music concerts and family days.
A video connection with Phuket Provincial Court means many prisoners no longer have to be transported to court in shackles every 12 days for remand appearances.
Handmade products from prisons around Thailand's south will be for sale at fair at Saphan Hin park in Phuket City from June 15-22.