Cook and drain fettuccine as directed on package.
While fettuccine is cooking, spray 12-inch nonstick skillet with cooking spray; heat over medium heat. Cook chicken and salt in skillet 2 to 3 minutes, stirring occasionally, until chicken is brown. Stir in frozen green beans. Cover and cook over medium heat 3 to 4 minutes, stirring occasionally, until beans are crisp-tender.
Mix orange juice and cornstarch until smooth. Stir orange juice mixture, marmalade and cherries into chicken mixture. Heat to boiling, stirring constantly; reduce heat to medium. Cover and cook 2 to 3 minutes, stirring occasionally, until beans are tender and chicken is no longer pink in center. Add fettuccine to chicken mixture; toss. Sprinkle each serving with walnuts.