Juvenile court prosecutors moved yesterday to put 18-year-old Tyrone Briscoe back in a youth detention center on the grounds that Briscoe's recent bank robbery arrests had violated the terms of his release from custody in July.

Briscoe had been found guilty of bank robbery less than a year earlier, when he was still a juvenile.

The Southwest Washington youth, who says "bank robberies ain't no big thing" and protests he is innocent of the adult charges, was released from the D.C. jail Wednesday on a $500 bond, despite two attempts by frustrated federal prosecutors to keep him in custody.

Today, Briscoe is scheduled to appear before a D.C. Superior Court judge who is to consider revocation of his release on the juvenile conviction, according to his mother, Toni Briscoe.

If the court approves the juvenile prosecutors' request, Briscoe will be returned to the city's maximum security detention facility for youth offenders in Laurel, the Oak Hill Youth Center.

Interviewed last night, Briscoe said he was committed to Oak Hill in January and remained there for seven months on the juvenile bank robbery conviction.

Various sources explained yesterday that a condition of release from the center is the offender's agreement to comply with all city laws. In order to convince the court to revoke Briscoe's release, prosecutors must show, through witnesses like police officers, there is evidence to believe that Brisco has committed the recent bank robberies.

Deputy D.C. Corporation Counsel Geoffrey M. Alprin, chief of the criminal division, confirmed yesterday that his office had filed the request to revoke Briscoe's release. Alprin, whose office prosecutes juvenile offenders, refused to comment further on the case because it is technically a juvenile matter.

If the court agrees to the prosecutors' request, Briscoe could be held at-Oak Hill pending resolution of the bank robbery charges against him -- as an adult -- in U.S. District Court here, knowledgeble sources said.

Since his 18th birthday July 17 -- making him an adult in the eyes of the court -- Briscoe has been arrested on five bank robbery charges.Two of the charges were dropped for insufficient evidence, but District police contend Briscoe remains a suspect in those and other holdup cases.

Briscoe, who three months ago went on television to talk about robbing banks, was arrested and charged Oct. 17 for the robbery of a Northwest Washington bank, but was released on personal recognizance the next day by a federal magistrate.

On Oct. 30, Briscoe was arrested on a weapons charge and released from D.C. Superior Court to the supervision of a third party custodial group. Then, on Nov. 24, he was arrested and charged with the robbery two days earlier of a bank at 301 Seventh St. NW.

Last Friday, the chief judge of the U.S. District Court here reduced Briscoe's bond in that case from $25,000 to $500, that action sent federal prosecutors rushing to the Superior Court to try to secure Briscoe's detention on the weapons charge.

A Superior Court judge agreed to hold Briscoe over the weekend on $10,000 bond. Then, at a hearing Monday, the U.S. attorney's office charged that Briscoe had violated the conditions of his release on the weapons charge. But Judge Tim Murphy rejected this argument -- and freed Briscoe on personal recognizance -- after it was discovered that the government's witness in the case had no first-hand knowledge of the alleged violation.

That left Briscoe to post the $500 bond for his release on the bank robbery charge, which he did Wednesday morning. That afternoon, the U.S. attorney's office formally asked Murphy to reconsider his decision.

Now juvenile prosecutors from the corporation counsel's office have asked the court to revoke Briscoe's "after-care status" -- the juvenile court equivalent of parole.

Briscoe, in a telephone interview, said he received notice to appear today in Superior Court, but added he did not understand what the proceeding was about. According to one of his lawyers, Charles Barker, Briscoe is scheduled to appear in Superior Court at 9:15 a.m. for the hearing, has a 10 a.m. appointment for an interview with a court psychiatrist. then must report to police headquarters to give a handwriting sample at 11:30 a.m. and participate in a lineup at 12:30 p.m.