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                  <text>Document disclosed under the Access to Information
fitt^*
Document djvulgue en vertu de la Loi sur I'acces a I'information

2
\

1

•JIBTS 200-2115-2
TOP SECRET
CANADIAN EYSS ONLY

X
ATOMIC VUUffiRABILITY STuDY OF CMABA

r~x

SOKIARY OF SFISCTS OF AIR EUiiST OF ATOMIC 302133 AT S£.Li3CT3D AlkING POINTS

1.
Detailed reports for sixteen iiiajor Canadian cities have been
•"written to £ive full information on the effects on individual vital points,
and the methods by which these effects have been calculated,
2.
These reports i;ill total in all some 400 pages. Reading this
mass of data leaves no clear impression of ths relative damage around
different aiming points, nor of the extent to vjhich any particular industry
would be affected by attacks on any particular combination of aiming points.
3.
An attempt has, therefore, been made to design a summary which
will show readily, in table form, all the effects of any one explosion and
also the relative importance of different timing: points in an attack on any
particular industry in Canada.
4.
In any large city there is a very large number of possible
aiming points, according to the particular combination of effects the enemy
might seek. The study cannot assess every oossible aiming noint. It has
been confined to the most important aiming points, attacks upon which would
have the maximum effect on population or on industry. Attacks on other
aiming, points ijould have different combinations of effects, but would be
less important.
5.
The summary has been prepared in two versions. In one version,
the effects are shown in all cases in terms of the nuraber of vital points
affected, their category, and the percentage of damass caused. The second
version attempts to take account of the relative output of the vital points,
by express in-s the damege to each industry in terms of the dollar value of
production'which would be lost if the level of damage experienced persisted
for a year.

22 June, 1955.

WNNGRADED T9 SECREf
IltMI k SECIE1

000689

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