Behavior of a nuclear steel containment equipment hatch at large strain
During a severe accident, buckling of a steel containment hatch door, large deformation and ovaling of the hatch sleeve are potential causes of mismatch at the sealing surface which can result in a leakage path. A three-dimensional nonlinear finite element analysis of a typical steel containment/sleeve/hatch assembly that includes containment stiffeners, pretensioned swing bolts, and hatch door geometric imperfection is presented. The analysis was carried out to the nonlinear range up to large strains. The results indicated that the buckling load occurs at pressure, far above that which causes gross yielding of the shell plate. Although buckling of the hatch door increased the relative motions of the hatch sleeve and the hatch door, the motions remained sufficiently small to prevent leakage.
- Research Organization:
- Civil Engineering Dept., Iowa State Univ., Ames, IA (US)
- OSTI ID:
- 6735314
- Journal Information:
- J. Pressure Vessel Technol.; (United States), Journal Name: J. Pressure Vessel Technol.; (United States) Vol. 110:2; ISSN JPVTA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
220200 -- Nuclear Reactor Technology-- Components & Accessories
220900* -- Nuclear Reactor Technology-- Reactor Safety
36 MATERIALS SCIENCE
360103 -- Metals & Alloys-- Mechanical Properties
99 GENERAL AND MISCELLANEOUS
990230 -- Mathematics & Mathematical Models-- (1987-1989)
ACCIDENTS
ALLOYS
BUCKLING
CONTAINMENT
CONTAINMENT SYSTEMS
DEFORMATION
ENGINEERED SAFETY SYSTEMS
FINITE ELEMENT METHOD
GEOMETRY
IRON ALLOYS
IRON BASE ALLOYS
MATERIAL BUCKLING
MATHEMATICS
NONLINEAR PROBLEMS
NUCLEAR FACILITIES
NUCLEAR POWER PLANTS
NUMERICAL SOLUTION
POWER PLANTS
REACTOR ACCIDENTS
STEELS
STRESS ANALYSIS
THERMAL POWER PLANTS
THREE-DIMENSIONAL CALCULATIONS