High-Dose Chemotherapy and Radiation Therapy Followed by Peripheral Stem Cell Transplantation in Treating Patients With Acute Leukemia in Remission

DISEASE CHARACTERISTICS: Previously diagnosed acute leukemia in one of the following categories: Acute myelogenous leukemia (any subtype) in first or subsequent remission Ph+ acute lymphoblastic leukemia (ALL) in first or greater remission Ph- ALL in second or subsequent remission Cellular marrow with no morphologic evidence of residual leukemia within approximately 2 weeks of cryopreservation Negative CSF cytology required of ALL patients Allogeneic marrow transplant considered for patients under age 55 with a healthy HLA-identical family member available

PATIENT CHARACTERISTICS: Age: Over 16 to 65 Performance status: Not specified Hematopoietic: WBC greater than 3,500/mm3 Platelet count greater than 100,000/mm3 Hepatic: Bilirubin less than 2.0 mg/dl Renal: Creatinine no greater than 1.5 mg/dl OR Creatinine clearance at least 60 ml/min Cardiovascular: LVEF at least 50% by MUGA or normal on echocardiogram Pulmonary: DLCO at least 50% of predicted Other: HIV seronegative No uncontrolled infection Negative pregnancy test required of fertile women

PRIOR CONCURRENT THERAPY: See Disease Characteristics