Shielding requirements for particle-bed propulsion systems. Special report, May 90-Mar 91
Technical Report
·
OSTI ID:6366621
Nuclear Thermal Propulsion systems present unique challenges in reliability and safety. Due to the radiation incident upon all components of the propulsion system, shielding must be used to keep nuclear heating in the materials within limits; in addition, electronic control systems must be protected. This report analyzes the nuclear heating due to the radiation and the shielding required to meet the established criteria while also minimizing the shield mass. Heating rates were determined in a 2000 MWt Particle Bed Reactor (PBR) system for all materials in the interstage region, between the reactor vessel and the propellant tank, with special emphasis on meeting the silicon dose criteria. Using a Lithium Hydride/Tungsten shield, the optimum shield design was found to be: 50 cm LiH/2 cm W on the axial reflector in the reactor vessel and 50 cm LiH/2 cm W in a collar extension of the inside shield outside of the pressure vessel. Within these parameters, the radiation doses in all of the components in the interstage and lower tank regions would be within acceptable limits for mission requirements.
- Research Organization:
- Phillips Lab., Edwards AFB, CA (United States)
- OSTI ID:
- 6366621
- Report Number(s):
- AD-A-240780/7/XAB; PL-TR--91-3018
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
210600* -- Power Reactors
Auxiliary
Mobile Package
& Transportable
CONTAINERS
CONTROL SYSTEMS
DESIGN
DIMENSIONS
ELECTRONIC EQUIPMENT
ELEMENTS
EQUIPMENT
HEATING
MASS
MATERIALS
METALS
MOBILE REACTORS
NESDPS Office of Nuclear Energy Space and Defense Power Systems
OPTIMIZATION
POWER REACTORS
PRESSURE VESSELS
PROPULSION REACTORS
PROPULSION SYSTEMS
RADIATION PROTECTION
REACTORS
RELIABILITY
SEMIMETALS
SHIELDING
SHIELDING MATERIALS
SHIELDS
SILICON
SPACE POWER REACTORS
SPACE PROPULSION REACTORS
THERMAL SHIELDS
THICKNESS
TRANSITION ELEMENTS
TUNGSTEN
210600* -- Power Reactors
Auxiliary
Mobile Package
& Transportable
CONTAINERS
CONTROL SYSTEMS
DESIGN
DIMENSIONS
ELECTRONIC EQUIPMENT
ELEMENTS
EQUIPMENT
HEATING
MASS
MATERIALS
METALS
MOBILE REACTORS
NESDPS Office of Nuclear Energy Space and Defense Power Systems
OPTIMIZATION
POWER REACTORS
PRESSURE VESSELS
PROPULSION REACTORS
PROPULSION SYSTEMS
RADIATION PROTECTION
REACTORS
RELIABILITY
SEMIMETALS
SHIELDING
SHIELDING MATERIALS
SHIELDS
SILICON
SPACE POWER REACTORS
SPACE PROPULSION REACTORS
THERMAL SHIELDS
THICKNESS
TRANSITION ELEMENTS
TUNGSTEN