Original sentence: Dozens of radiation accidents have happened in the United States.Improvements in control room habitability, "sight lines" to instruments, ambiguous indications and even the placement of "trouble" tags were made; some trouble tags were covering important instrument indications during the accident.In addition to the improved operating training, improvements in quality assurance, engineering, operational surveillance and emergency planning have been instituted.There is consensus that the accident was exacerbated by wrong decisions made because the operators were overwhelmed with information, much of it irrelevant, misleading or incorrect.While the system functioned as designed, unfortunately, the design was found to be flawed
Edited sentence: Dozens of radiations accidents have happened in the United States