Patent
1976-09-30
1978-07-25
Engle, Samuel W.
176 40, 176 87, 176DIG2, G21C 900
Patent
active
041027396
ABSTRACT:
The primary heat transport system of a nuclear reactor -- particularly for a liquid-metal-cooled fast-breeder reactor -- is shielded and protected from leakage by establishing and maintaining a bed of a powdered oxide closely and completely surrounding all components thereof by passing a gas upwardly therethrough at such a rate as to slightly expand the bed to the extent that the components of the system are able to expand without damage and yet the particles of the bed remain close enough so that the bed acts as a guard vessel for the system. Preferably the gas contains 1 to 10% oxygen and the gas is passed upwardly through the bed at such a rate that the lower portion of the bed is a fixed bed while the upper portion is a fluidized bed, the line of demarcation therebetween being high enough that the fixed bed portion of the bed serves as guard vessel for the system.
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patent: 3990941 (1974-07-01), Scholz
Carlson Dean E.
Engle Samuel W.
Jackson Frank H.
Palo Ralph
The United States of America as represented by the United States
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