_e pa 7. We are in complete agreement with Professor Muller's remarks that atomic energy “operations must be carried on with such rigorous safeguards that those working on the projects will feel no fear for themselves or their descendants." In this connection, the AEC may consider placing an upper limit of yearly exposure for atomic energy workers. The average exposure to atomic energy workers during past operations, how- ever, has been so far below the maximum permissible level that the placing of a yearly upper limit would not be expected to impose any major restrictions, - 28 - Enclosure V