INTRODUCTION The purpose of this brochure is to review briefly the (a) radiological safety criteria, (bo) data on radiation exposures from fallout, and (c) measures to protect the public related to nuclear weapons tests at the Nevada Test Site. The radiological safety criteria are under constant surveillance and probably will be re- vised as a result of additional data from OPERATION PLUMBBOB. The exposure data, of course, will be up-dated after OPERATION ' PLUMBBOB. It is not the intent to cover here Project Sunshine or exposures from low. level long-lived gamma emitting isotopes. Rather, this trochure is concerned almost entirely with the more immediate aScecus of nuclear weapons testing at the Neveda Test Site. This is a prelicinary report. Suggestions are most welcome. rs my Gordon M. Dunning

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