Verification of nonlinear piping response calculation with data from seismic testing of an in-plant piping system
- Nuclear Regulatory Commission, Washington, DC (United States). Div. of Engineering
The nonlinear piping analysis code NONPIPE was evaluated by modeling and performing posttest calculations for a high level seismic test performed on an in-plant piping system at the HDR test facility in Germany. The piping used only rigid struts for dynamic supports and experienced significant nonlinear response and plastic deformation in the test. The calculated responses in general had the same time trends as the measurements but were quite variable in estimating peak values. Peak strains were overestimated, and shear strains to a greater degree than bending strains. Peak strut forces were underestimated as a group. On the average the displacements were estimated close to the measurements and the accelerations were overestimated. Spatial consistency in displacement and strut force estimates was better than for accelerations. Qualitatively the analytical predictions are similar to experimental observations and they provide quantitative estimates that are useful for practical purposes. The modeling aspects that contribute to large discrepancies are identified. Both the experiments and calculations clearly indicate that piping is all but immune to gross failure even when subjected to extreme seismic loading.
- Research Organization:
- Nuclear Regulatory Commission, Washington, DC (United States). Div. of Engineering; Argonne National Lab., IL (United States)
- Sponsoring Organization:
- Nuclear Regulatory Commission, Washington, DC (United States)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 10137841
- Report Number(s):
- NUREG/CR--5841; ANL--92/4; ON: TI92011388
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
210100
22 GENERAL STUDIES OF NUCLEAR REACTORS
220900
99 GENERAL AND MISCELLANEOUS
990200
COMPUTER CALCULATIONS
DYNAMIC LOADS
HDR REACTOR
MATHEMATICS AND COMPUTERS
N CODES
NONLINEAR PROBLEMS
PIPES
POWER REACTORS
NONBREEDING
LIGHT-WATER MODERATED
BOILING WATER COOLED
REACTOR SAFETY
RESPONSE FUNCTIONS
SEISMIC EFFECTS
STRAINS
STRESS ANALYSIS
STRESSES
TESTING