DrillAn operations-based exercise often employed to validate a single operation or function.Document metadataFieldValueDefinition 1An operations-based exercise often employed to validate a single operation or function.CategoriesAdministration, Business and Support Services, Safety, SecurityTerm OPINA - National Nuclear Security AdministrationDefinition typeDefinitionRelatedSourcesSource 1:DOE O 151.1E, Comprehensive Emergency Management SystemSomething wrong with this record? Tell us