Gas-cooled reactor for space power systems
Reactor characteristics based on extensive development work on the 500-MWt reactor for the Pluto nuclear ramjet are described for space power systems useful in the range of 2 to 20 MWe for operating times of 1 y. The modest pressure drop through the prismatic ceramic core is supported at the outlet end by a ceramic dome which also serves as a neutron reflector. Three core materials are considered which are useful at temperatures up to about 2000 K. Most of the calculations are based on a beryllium oxide with uranium dioxide core. Reactor control is accomplished by use of a burnable poison, a variable-leakage reflector, and internal control rods. Reactivity swings of 20% are obtained with a dozen internal boron-10 rods for the size cores studied. Criticality calculations were performed using the ALICE Monte Carlo code. The inherent high-temperature capability of the reactor design removes the reactor as a limiting condition on system performance. The low fuel inventories required, particularly for beryllium oxide reactors, make space power systems based on gas-cooled near-thermal reactors a lesser safeguard risk than those based on fast reactors.
- Publication Date:
- OSTI Identifier:
- Report Number(s):
- UCRL-95973; CONF-870804-19
- DOE Contract Number:
- Resource Type:
- Resource Relation:
- Conference: 22. intersociety energy conversion engineering conference, Philadelphia, PA, USA, 10 Aug 1987; Other Information: Paper copy only, copy does not permit microfiche production
- Research Org:
- Lawrence Livermore National Lab., CA (USA)
- Country of Publication:
- United States
- 21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS; SPACE POWER REACTORS; BRAYTON CYCLE POWER SYSTEMS; DESIGN; COMPUTER CALCULATIONS; GAS COOLED REACTORS; RADIATORS; REACTOR KINETICS; REACTOR MATERIALS; ENERGY SYSTEMS; HEAT EXCHANGERS; KINETICS; MATERIALS; MOBILE REACTORS; POWER REACTORS; POWER SYSTEMS; REACTORS NESDPS Office of Nuclear Energy Space and Defense Power Systems 210600* -- Power Reactors, Auxiliary, Mobile Package, & Transportable; 210300 -- Power Reactors, Nonbreeding, Graphite Moderated
Enter terms in the toolbar above to search the full text of this document for pages containing specific keywords.