Accession Number:

AD0774467

Title:

Development of a Hydrazine Gas-Generation System for the Large Object Salvage System (LOSS)

Descriptive Note:

Technical rept. Jul 1970-Jan 1973

Corporate Author:

NAVAL CIVIL ENGINEERING LAB PORT HUENEME CA

Personal Author(s):

• Tate, K. W.

Report Date:

1973-12-01

Pagination or Media Count:

65.0

Abstract:

The report describes the development and testing of a self-contained hydrazine-fueled, underwater gas-generation system designed to provide large volumes of noncondensable gas for a salvage buoyancy application. This system is capable of generating sufficient gas to displace 200 L tons of seawater at a depth of 850 feet. The catalytic decomposition of monopropellant hydrazine is used to produce hydrogen and nitrogen gases which serve as the buoyancy media. The hydrazine gas generation system was mated with the LOSSLarge Object Slavage System pontoon and successfully tested in a shallow water demonstration of the integral lift system. In this demonstration, a 74 L ton object was salvaged from a depth of 90 feet. The success of this in situ test demonstrated the suitability and practicality of using monopropellant hydrazine to produce large volumes of buoyancy gas.

Descriptors:

• *GAS GENERATING SYSTEMS
• *MARINE SALVAGE
• *PONTOONS
• BUOYANCY
• HYDRAZINES
• MONOPROPELLANTS
• PIPING SYSTEMS
• PRESSURE REGULATORS
• VALVES

Subject Categories:

• Marine Engineering

Distribution Statement:

APPROVED FOR PUBLIC RELEASE