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ground zéro and to fall-out,

Following the detonation, personnel entering shot areas will be ex-

posed to beta particles and gatma rays coming from induced neutron activity in the soil
ed on the ground.

and any fission products which might have been d epositThere may also be a potential alpha particle hazard

‘rom the unfissioned fissionable materials which may be deposited on the
ground,
Protection
a.

Against the primary radiological effects, distance will provide

protection,
b,

«against the secondary radioactivity hazards from radioactive fis-

sion products, induced radioactivity and unfissioned residue, detection
and avoidance provide the best protection.

Suitable instruments indi-

cate both the presence and intensity of radioactivity at a given Place.
area reconnaissance, the maintenance of contamination situation maps, ©
the posting of areas of hazard, and minimizing the spread of contaminated

material into uncontaminated areas constitute the active measures for

;

reducing the radiological hazard,
ce

Personnel within an operational radius of ground zero who are to be

facing in the direction of the flash will be required to wear sp:cial
goggles to protect their eyes against excessive light.

Personnel within

the ahove operational radius who are not provided goggles will face, with
eyes closed, in the opposite direction from the flash,

after ten (10)-

seconds, such personnel may turn about and observe the phenomena,
3.

anticipated Hazard Areas
a.

Immediately under the panb burst there will be an area of intense

tom cin
.
es
.
radioactivity extending oe

.
.
and to some extent crosswind and upwind

with gradually decreasing intansity,,.

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