The TC 262 Working Group “Core risk management standards” (WG2) was invited to its 4th meeting in Paris at the “Institut de Radioprotection et de Sûreté Nucléaire ” (ISRN) from March 9th to March 13th, 2015. About 35 experts from 20 countries participated in this meeting. In a fundamental discussion it recommended to TC 262 stopping the limited revision of ISO 31000 and ISO Guide 73 and starting the full revision.