1970

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• First overseas ANS local sections are established: Europe-Belgium (now Belgian Nuclear Society, an ANS Affiliated Society); Europe-Central; and Europe-France.
• Nuclear Standards News is first published.

1971

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• ANS participates in Fourth Geneva Conference, publishes special (extra) issue of Nuclear News about conference.

1974

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• Atomic Energy Commission splits into the Energy Research and Development Administration and the Nuclear Regulatory Commission.

1976

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• ANS conducts first Pacific Basin Nuclear Conference.
• First ANS/ENS International Conference, Washington, D.C.
• First liaison agreement between ANS and another nuclear society (Israel Nuclear Society).

1978

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• ANS purchases the old Oak School and moves to La Grange Park, Illinois.

1979

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• Three Mile Island accident occurs in Pennsylvania.
• Alpha Nu Sigma honor society established.
• First ANS public policy statement (High-Level Radioactive Waste Disposal) is issued.