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UNITED STATES
ATOMIC ENERGY COMMISSION
WASHINGTON, D.C.
26545
pug 22 ‘74
Mr. Lombard Squires, Chaircan
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U. S. Atomic Energy Comaission
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Dear Mr. Squires:
The Commission has recently determined that the following information
may be published without undue or unreasonable risk to the common
defense and security:
1.
The fact that the thermonuclear fuel used in the Mike
test (10/31/52) of the Ivy series was liquid deuterium,
2.
The related fact that complex and bulky cryogenic
equipment was associated with Mike.
3.
The fact
that the device fired
in the Bravo
test
(2/28/54) of the Castile series used lithium deuteride
as
4.
its thermonuclear
fuel.
The yield of the King test (11/15/52) of the Ivy series
was 500 KT.
Accordingly, this intormation has been declassified.
been coordinated with the Department of Defense,
This action has
Sincerely,
BEST COPY AVAILABLE
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