Assessment of Ultimate Load Capacity of concrete containment structures against structural collapse

Nuclear safety regulations in India require assessment of containment structure for Ultimate Load Capacity (ULC) for internal pressure. ULC and associated behavior of containment is evaluated with respect to various performance indicators based on defined criteria. Non-linear FE analysis of the cont...

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Bibliographic Details
Published in:Nuclear engineering and design 2017-11, Vol.323, p.417-426
Main Authors: Chakraborty, Moloy K., Acharya, Sourav, Pisharady, Ajai S., Roshan, A.D., Bishnoi, L.R.
Format: Article
Language:English
Subjects:
Accident conditions
Atomic structure
Cellular structure
Computer simulation
Concrete
Containment
Containment vessels
Finite element analysis
Finite Element Method
Hermetic boundary
Internal pressure
Iron
Mathematical models
Non linear analysis
Nonlinear analysis
Nuclear accidents & safety
Nuclear electric power generation
Nuclear energy
Nuclear engineering
Nuclear power plants
Nuclear safety
PHWR
Pressure
Reinforced concrete
Safety management
Safety regulations
Steel
Studies
Ultimate Load Capacity
Ultimate loads
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Summary:Nuclear safety regulations in India require assessment of containment structure for Ultimate Load Capacity (ULC) for internal pressure. ULC and associated behavior of containment is evaluated with respect to various performance indicators based on defined criteria. Non-linear FE analysis of the containment structures was carried out considering non-linear material properties of concrete and steel using ABAQUS and ANSYS software. Evaluation of ULC was undertaken to understand containment performance under severe accident conditions, as a round robin analysis based on 1:4 containment model test results conducted at SANDIA national Lab, USA. AERB also participated in the international round-robin exercise organized by BARC to assess the ULC of BARC’s containment test model (BARCOM). The test model is a 1:4 scale replica of 540MWe PHWR pre-stressed concrete inner containment structure of Tarapur Atomic Power Station Units 3&4. Based on the knowledge gained from these studies VVER 1000 reactor building constructed at Kudankulam (KKNPP) was assessed for ULC of its primary containment as a regulatory requirement. VVER containment study was first of its kind as it is a lined containment with cellular basement structure. Non-linear FE analysis in ABAQUS using layered shell model was performed to assess the ULC of the containment structure. Three times of design pressure is estimated to be ULC of the structure.
ISSN:0029-5493
1872-759X
DOI:10.1016/j.nucengdes.2017.06.046