 He wrote a paper published in "Nuclear Engineering International" in 1991 and a book in which he claimed that poor plant design, rather than plant personnel, was primarily responsible for the accident.In later reports, it was found that Dyatlov had threatened some power plant workers with job terminations if they did not proceed with the test that night in Chernobyl.Nevertheless, IAEA's Report by their International Nuclear Safety Advisory Group from 1992 supports Dyatlov's evaluation about the RBMK reactor's design flaws, but also criticises the lack of a safety culture in the Soviet nuclear industry.