3D COUPLED CFD SIMULATION OF INTERMEDIATE HEAT EXCHANGER OF FUTURE FAST BREEDER REACTORS

One of the major materials problems encountered in the development of fast breeder reactors for commercial power generation is the phenomenon of swelling in core structural components and fuel cladding. This volume expansion, which is due to the retention of lattice vacancies by agglomeration into large polyhedral clusters (voids), may amount to ten percent or greater at goal fluences in some austenitic stainless steels. From a design standpoint, this is an undesirable situation, and it is necessary to obtain experimental confirmation that such excessive volume expansion will not occur in materials selected for core applications in the Fast Flux Test Facility, the prototypic LMFBR now under construction at the Hanford Engineering Development Laboratory (HEDL). The HEDL JEM-1000 1 MeV electron microscope is being used to provide an insight into trends of radiation damage accumulation in stainless steels, since it is possible to produce atom displacements at an accelerated rate with 1 MeV electrons, while the specimen is under continuous observation.

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Measurement of Thermal-Hydraulic Parameters in Liquid-Metal-Cooled Fast Breeder Reactors

Proceeding of Advanced Course in Measurement Techniques in Heat and MassTransfer ◽

10.1615/ichmt.1985.advcoursemeastechheatmasstransf.190 ◽

1985 ◽

Author(s):

John I. Sackett

Keyword(s):

Liquid Metal ◽

Hydraulic Parameters ◽

Fast Breeder Reactors ◽

Breeder Reactors

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Appraisal of Allowable Loads by Simplified Rules

Journal of Pressure Vessel Technology ◽

10.1115/1.3264760 ◽

1986 ◽

Vol 108 (2) ◽

pp. 131-137

Author(s):

D. Moulin

Keyword(s):

Experimental Investigation ◽

Plastic Region ◽

Thin Structures ◽

Geometric Imperfections ◽

Buckling Behavior ◽

Simplified Method ◽

Post Buckling ◽

Initial Geometric Imperfections ◽

Fast Breeder Reactors ◽

Breeder Reactors

This paper presents a simplified method to analyze the buckling of thin structures like those of Liquid Metal Fast Breeder Reactors (LMFBR). The method is very similar to those used for the buckling of beams and columns with initial geometric imperfections, buckling in the plastic region. Special attention is paid to the strain hardening of material involved and to possible unstable post-buckling behavior. The analytical method uses elastic calculations and diagrams that account for various initial geometric defects. An application of the method is given. A comparison is made with an experimental investigation concerning a representative LMFBR component.

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Progress in Developing Constitutive Equations for Inelastic Design Analysis

Journal of Pressure Vessel Technology ◽

10.1115/1.3264278 ◽

1983 ◽

Vol 105 (3) ◽

pp. 273-276 ◽

Cited By ~ 10

Author(s):

C. E. Pugh

Keyword(s):

Constitutive Equations ◽

Inelastic Strain ◽

Short Term ◽

Inelastic Material ◽

Fast Breeder Reactors ◽

Breeder Reactors ◽

Term Creep ◽

Inelastic Design ◽

Creep Deformations

A summary is given of the constitutive equations that have been developed for use in design assessments of elevated temperature components of liquid metal fast breeder reactors. The discussion addresses representations of short-term (plastic) and long-term (creep) inelastic material responses. Attention is given to improved representations of the interactions between plastic and creep deformations. Most of the discussion is in terms of constitutive equations that make use of the concept of separating the total strain into elastic, plastic, and creep portions. Additionally, some discussion is given of progress being made toward establishing design equations based on unified measures of inelastic strain that do not distinguish different strain portions.

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