Bernard C. Welch, the accused slayer of Washington cardiologist Michael Halberstam, was indicted yesterday in Fairfax County on a charge of raping a 32-year-old Vienna woman in December 1977.

Fairfax County Commonwealth's Attorney Robert Horan said Welch also was indicted on burglary and maiming charges and the use of a firearm in connection with the same incident.

Horan said that while a trial date may be set today, any proceedings by Fairfax County against Welch would not begin until after trials in the District of Columbia are concluded.

Welch was indicted on a first-degree murder charge last week in the slaying of Halberstam, and also has been charged in several Northwest Washington burglaries.

Welch's attorney, Sol Z. Rosen, asked yesterday that the murder trial be moved from the Washington area because of the heavy publicity the case has received.

In addition to widespread local publicity, Life magazine has agreed to pay Welch $9,000 for exclusive use of personal photographs, which will be published along with an interview in the magazine's February issue.

Court papers also were filed on Welch's behalf in D.C. Superior Court Monday asking that the burglary charges not related to the Halberstam slaying be separated from the murder indictment.

Rosen also asked that prosecutors and witnesses be prohibited from testifying about the $4 million in jewelry and other items seized at Welch's house that were used to link Welch to numerous area burglaries, and that an identification made of Welch by Halberstam's wife shortly after the shooting be invalidated.