Fairfax County School Superintendent Robert R. Spillane's latest proposal for the boundaries of the new high school at Centreville's Braddock Park site is getting mixed reviews.

At issue are which students would be able to attend the $27 million, 2,000-student- capacity school when it opens next fall, and which high schools would lose students, and possibly programs, because of the changes.

The plan would send students from the Clifton area to Robinson, Braddock Park and Lanier high schools, although parents had asked for their children to be kept together at the new building.

"Never in my wildest dreams would I have dreamt they would split the Clifton enrollment area three ways," said Trudy Larson, a Clifton PTA member who has been organizing petition and letter-writing drives. "That seems very far-fetched."

Under the plan, Fairfax High School's enrollment would drop from 1,896 this year to an estimated 1,470 in 1992 as some developments are transferred to Braddock Park. Parents there fear that their school will lose teachers and classes as a result.

"I think {that the plan} is an inappropriate answer to a difficult situation. I think it's one that appears to me to be ill-conceived," said Fairfax PTSA President K. Stewart Evans Jr., who said he sent letters to 1,600 Fairfax parents Friday asking them to call School Board members and officials.

But the plan has played better in Chantilly, where it calls for reducing attendance at the severely crowded high school from 2,623 in 1987 to 1,865 in 1992, and in the new developments of Virginia Run, Hampton Forest and Hampton Chase, which the plan includes in Braddock Park.

"I think they used a little better judgment than they did the first or the second or the third time around," said Chantilly PTA pyramid coordinator Gail Jasionowski. She said, however, that she was concerned that the new plan would split the Country Club Manor subdivision along Braddock Road.

"We think it's just ridiculous," said Shelli Britton, president of the PTA at Centreville's Cub Run Elementary School. "You can't use Braddock Road as a natural boundary without regard for dividing the community. There was no reason for that. It's a very close-knit community, and they're splitting it in half arbitrarily."

Spillane has recommended that Braddock Park draw students from areas now served by Chantilly and Fairfax high schools. The Braddock Park boundaries would run from the Loudoun County line in the west along Braddock Road to Rte. 28 and then to Rte. 29. The proposed boundary goes south along the eastern edge of the Hampton Forest and Hampton Chase subdivisions and the Clifton Elementary School attendance area to the Southern Railroad line, which it follows to the Prince William County line, except for a jog to include the official boundaries of the Town of Clifton.

Under the plan, parts of the Chantilly High School enrollment area would be assigned to Fairfax High School, and parts of the Fairfax High School area would go to Woodson and Robinson high schools.

Besides Fairfax and Chantilly high schools, attendance problems could occur at Braddock Park, where school officials project will have 2,310 students in 1990, the year before intermediate school students leave the building. Attendence at Robinson Intermediate School is projected to remain close to 3,900 during the next five years, compared with a 4,050-student capacity.

Spillane's last recommendation would have kept the Clifton enrollment area together, but it did not put the new developments of Hampton Forest, Hampton Chase and Virginia Run in Braddock Park, even though they are closer to the new school than Clifton is. At a community meeting, people who had bought houses in the new developments said they had expected that their children would be assigned to the new school, and they shouted at school officials for putting Clifton students there while leaving out their homes.

Now, Clifton is in the position of being left out while the new subdivisions are included, and Larson, of the Clifton PTA, said some parents there are bitter.

"There is just such extreme bad feeling out here, I don't think there will be any solution that will make everybody happy," she said. "The new developments do have to depend on the support of the old to pass the bond referendums for the new schools."

The School Board is to make the final decision March 10.