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ADVISORY

BUWLLETIN

NO,

{DATE )
TO:

STATE AND LOCAL CIVIL DEFENSE DIRECTORS

SUBJECT: RESIDUAL RADIATION IN RELATION TO CIVILIDEFENSE
I.

Purpose
The purpose of this Advisory Bulletin is qo revise Advisory

Bulletin No. 72, issued in 1951, to summarize information on
residual radiation with particular reference to
state interim FCDA policy recommendations in re

llout, and to
to civil

defense plans and operations.
II.

General Statement
Recent developments in nuclear weapons ha

probability that serious amounts of radiation fr
experienced in addition to the blast and thermal

increased the
fallout may be
Effects.

Previous

civil defense thinking and planning will not havelto be abandoned,
but rather must be re-evaluated, broadened, and

tensified.

Civil

defense preparations must continue to contemplateJinitial radiation
problems, the smaller weapons, non-contaminating
tions with little or no warning time and all of t
which have previously confronted planners.

pursts, detonaother problems

The increased atten-

tion to fallout, which is by no means a new probl

(see "Effects

of Atomic Weapons", 1950, Chapter VIII), re-emphadizes the fact
that civil defense must provide a vartety of specified operational
capabilities to meet a variety of situations,
III.

Discussion

Initial radiation (the gamma rays and neutyions released
instantaneously with the explosion) produced by a

Barge nuclear

weapon detonated on or near the ground does not present a serious
nazard beyond the area where heat and blast are off
CONFIRMED TO BE UNCLASSIFIED
aY
THORITY OF DOLIOC
ED BY

1)

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