commiss opinion april facil intermedi storag spent fuel ahau feder republ germani german text authent euratom gener data plan discharg radioact effluent facil intermedi storag spent fuel ahau provid german govern accord articl euratom treati commiss letter date octob receiv octob basi data obtain facil locat km frontier netherland consult group expert commiss opinion implement plan liabl normal oper case accid result radioact contamin signific point view health water soll airspac member state opinion address feder republ germani brussel april commiss carlo ripa di meana member commiss