commiss decis novemb conclus agreement cooper field control thermonuclear fusion european atom energi commun unit state depart energi commiss behalf commun euratom commiss european commun regard treati establish european atom energi commun paragraph articl thereof council decis septemb approv agreement cooper field control thermonuclear fusion european atom energi commun unit state depart energi essenti commiss conclud agreement behalf commun decid articl agreement cooper field control thermonuclear fusion european atom energi commun unit state depart energi conclud behalf commun text agreement append decis articl presid commiss empow design person author sign agreement purpos commit european atom energi commun brussel novemb commiss karl heinz narj vice presid sign