SOVIET NUCLEAR POWERED SUBMARINES AND THEIR PROPULSION SYSTEMS

• Document Type: FOIA
• Collection: CIA Analysis of the Soviet Navy
• Document Number (FOIA) /ESDN (CREST): 0005508941
• Release Decision: RIPPUB
• Original Classification: U
• Document Page Count: 4
• Document Creation Date: June 19, 2017
• Document Release Date: June 19, 2017
• Case Number: SC-2007-00006
• Publication Date: November 21, 1983

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Approved for Release: 2017/06/16 C05508941
TOP?SECRET
CENTRAL INTELLIGENCE AGENCY
WASHINGTON, D.C. 20505
APPROVED FOR RELEASE
CIA HISTORICAL RELEASE
PROGRAM
JUNE 2017
MEMORANDUM FOR: Director of Central Intelligence
2 1 NOV 1983
SUBJECT : Soviet Nuclear Powered Submarines and Their
Propulsion Systems
1. The enclosed Intelligence Information Special Report
identifies five Soviet nuclear powered submarines and comments
briefly on their propulsion systems. The information was acquired
from a Soviet with a technical background and good access to the
information.
2. Because the source of this report is especially sensitive,
this document should be handled on a strict need-to-know basis
within recipient agencies.
oh tin
Deputy lirector for Operations
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CARRY CLASSIFICATION AND CONTROLS or OVERALL DOCUMENT.
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Distribution:
Director of Central Intelligence
Director, Defense Intelligence Agency
Director of Naval Intelligence
Department of the Navy
Director, National Security Agency
Deputy Director of Central Intelligence
Deputy Director for Intelligence
Director of Scientific and Weapons Research
TS #838253
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COUNTRY USSR
DATE OF
NFO. Spring 1983
z
SOURCE
-3-
Intelligence Information Special Report
SUBJECT
DATE 2 1 NOV 1983
Soviet Nuclear Powered Submarines and Their Propulsion Systems
Soviet source
SUMMARY
This report identifies four Soviet nuclear powered submarines
by project number and comments on the type of propulsion system
installed in each. A new submarine called "AKULA" is also men-
tioned.
END OF SUMMARY
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1. Nuclear Nuclear reactor KLT-40 is intended for installation on
icebreakers being built in Finland for the Soviet Union. The
reactor unit itself is not secret, but certain of its systems
(steam generator, fuel, control system) are classified TOP SECRET
because the OK-650B and OK-900 reactors used in the Soviet Navy
and on Soviet icebreakers are identical.
2. A long series of Project 627 "LENINSKIY KOMSOMOL"-type
torpedo antiship submarines was built. These submarines had two
water-cooled reactors with a power of 150 MW each, and were built I
in Severodvinsk. The same reactor was installed on submarine
Project 659, which had four pairs of 300-mile-range surface-to-
surface missiles on deck. The missiles had to be fired when the
submarine was surfaced. Several such units were built in
Komsomolsk.
3. Project 671--"ZOLOTAYA RYBKA"--was a high-speed torpedo
submarine with a liquid-metal-cooled reactor. This unit was
supposed to have a high level of automatization which did not
require a large crew. There were no ordinary seamen on the unit,
only career seamen [sverkhsrochniki] and officers. It was built
at the Admiralty Yard in Leningrad. There was an accident involv-
ing this unit and the reactor was replaced by a water-cooled
reactor. Apparently this unit has not been used since.
4. Previously there had been submarines with Project 645
(Project 627, but with liquid-metal-cooled reactors). There had
also been an accident involving one of them, and no more Project
645 submarines were built. There is a new submarine called "AKULA"
which apparently has a liquid-metal-cooled reactor.
?Ttrr-56ciza_.
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