Prediction of nonlinear structural response in LMFBR elevated-temperature piping
The development of structural analysis capabilities to investigate possible accident initiations caused by structural degradation of liquid metal fast breeder reactor (LMFBR) piping is summarized. The ABAQUS finite element code is used to perform a nonlinear analysis of a bench mark problem proposed by the Pressure Vessel Research Committee. The problem is representative both in geometry and loading of an LMFBR elevated-temperature piping system, and published analytical results are available for comparison. Results show the system to be most sensitive to large, radial, thermal gradients that occur when the system experiences certain thermal transients. Repeated cycles of these transients will lead to thermal ratcheting, causing progressive deformation and strain accumulation in the system. Future work will verify the accuracy of the finite element model and quantify damage accumulated during the lifetime of an LMFBR elevated-temperature piping system.
- Research Organization:
- Los Alamos National Lab., NM (USA)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 6503663
- Report Number(s):
- NUREG/CR-3845; LA-10090-MS; ON: TI84017104
- Country of Publication:
- United States
- Language:
- English
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Breeding
22 GENERAL STUDIES OF NUCLEAR REACTORS
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BENCHMARKS
BREEDER REACTORS
EPITHERMAL REACTORS
FAST REACTORS
FBR TYPE REACTORS
FINITE ELEMENT METHOD
LIQUID METAL COOLED REACTORS
LMFBR TYPE REACTORS
NUMERICAL SOLUTION
PIPES
REACTORS
THERMAL CYCLING
THERMAL SHOCK
TRANSIENTS