PROBLEMS IN THE OPERATION OF LARGE CRYOGENIC SYSTEMS
- Two liquid-hydrogen test facilities were operated for fourteen months. These cells have the capability for transfer of liquid hydrogen at flow rates up to 100 lbs/sec and have a total storage capacity for liquid hydrogen of 156,000 gallons. A number of design and operational problems were met, for example, stresses in 8-in. diameter transfer lines, times and quantities of liquid hydrogen required for cooldown of transfer lines, dewar instrumentation, gas requirements for pressurization of liquid hydrogen filled dewars, and techniques for warmup of large cryogenic dewars. Solutions to many of these problems are described and outstanding problems discussed on the basis of current observations. In addition, some techniques are described that are employed for safe operation of the liquid hydrogen facility, including helium block systems for leaky valves, room inerting to prevent fire or explosion in the event of a hydrogen leak, and the purity control of dewar pressurizing gases and the purity control of purges of gas and liquld hydrogen transfer lines. A summary is included of major modifications that are planned or underway for these test facilities. (auth)
- Report Numbers:
- Other Subject(s):
- U.S. Atomic Energy Commission depository collection.
- DOE contract number: W-7405-ENG-36
NSA number: NSA-17-025383
OSTI Identifier 4697655
Research organization: Los Alamos National Lab. (LANL), Los Alamos, NM (United States).
View MARC record | catkey: 41321132