Introduction: A large number of people are affected by wars and nuclear-radiological crises. These crises due to human and transport resources and absence of a single clinical guide triage and prioritize victims can resulting in many causulties. For this purpose, local clinical guides could help reduce mortality.

Objective: This study aimed at developing triage clinical guidelines in nuclear_ radiological events that are all things considered.

Material and Methods: This study had a qualitative and combined two-step design. The first step was an overview study and a systematic review done on articles, books, organizational documents, and pre-hospital triage guidelines in nuclear-radiological events. In the second step of this study, the Delphi method was used to deal the agreement among experts. This means the full resources of the international clinical guidelines in nuclear-radiological events using library studies and internet search in databases (Pub Med, Google Scholar, Science Direct) between years 2000 and 2017 were selected; related resources were extracted and quality survey based on the AGREE II (Appraisal of Guidelines for Research and Evaluation II) scoring system was done and the initial guideline was drafted. The Delphi method, in order to summarize information in two rounds, was used with 6 professors and experts. Finally, data was summarized and final guidelines were developed.

Results: After selecting resources using the AGREE II instrument, the initial draft guidelines were written by the research team and were in hands of professionals for validation in the form of the Delphi method in two stages. After 6 weeks of the first stage, comments were collected and content integrated and changes were made. Subsequently, the draft was sent for the second round of Delphi. After collecting the opinions, consensus was reached on the comments and findings of published pre-hospital triage guidelines in nuclear-radiological events.

Discussion and Conclusion: A more organized management of injuries and their prioritization in order to provide the best treatment at the right time was done with regards to nuclear- radiological contamination.