Trial Application of the Draft Structural Design Criteria for Breeder Reactor Core Components to a Typical Blanket Assembly Duct

1981 ◽  
Vol 103 (4) ◽  
pp. 380-387
Author(s):  
V. K. Sazawal
Keyword(s):  
Structural Design ◽  
Failure Mechanisms ◽  
Reactor Core ◽  
Department Of Energy ◽  
Design Criteria ◽  
Test Case ◽  
Component Design ◽  
Core Components ◽  
Potential Failure ◽  
Further Development

This paper presents the results of a comprehensive trial application of the draft structural design criteria for highly irradiated core components to a typical blanket assembly duct. The development of the criteria (proposed RDT F 9-7) is sponsored by the U.S. Department of Energy. The activity focuses on the evaluation of the criteria using a typical breeder reactor blanket assembly as a test case and is not intended for judging the adequacy of the component design. Pertinent design rules from the draft criteria are applied to the component to determine: (a) difficulties, if any, that may arise in interpretation and application of the criteria, and (b) adequacy of the criteria rules and analysis methods to address various potential failure mechanisms expected in the reactor core during service. Based on the trial application, various recommendations are made to promote further development of the criteria.

scholarly journals Development of structural design criteria for highly irradiated core components

1978 ◽  
Author(s):  
D V Nelson ◽  
M M Abo-El-Ata ◽  
J D Stephen ◽  
R G Sim
Keyword(s):  
Structural Design ◽  
Design Criteria ◽  
Core Components

Community-Based Interventions to Reduce Child Maltreatment

2021 ◽  
pp. 104973152098696
Author(s):  
Camilla Kin-Ming Lo ◽  
Yuet Wing Cho
Keyword(s):  
Child Maltreatment ◽  
Hybrid Approach ◽  
Inclusion Criteria ◽  
Community Members ◽  
Protective Services ◽  
Community Based Interventions ◽  
Community Based ◽  
Community Institutions ◽  
Core Components ◽  
Further Development

Purpose: This review seeks to summarize selected literature on existing findings on the impacts of community-based interventions on the actual reduction of child maltreatment and to identify the core components of the interventions. Methods: This study systematically searched electronic databases, including PsycInfo, Medline, and Web of Science. The findings of the selected studies were summarized using narrative synthesis. Results: A total of four studies met the inclusion criteria of this study. The studies showed declines in child maltreatment incidences reported by child protective services and hospitals during the study periods. Four major components and approaches were identified among the selected interventions, including (1) the involvement of community members, (2) partnerships with community institutions, (3) multidisciplinary collaboration, and (4) responsiveness to the needs of the communities involved. Conclusions: The results of this review support the need for further development of community-based interventions using a hybrid approach.

Specification of stress limits for irradiated 316L(N)-IG steel in ITER structural design criteria

2004 ◽  
Vol 329-333 ◽  
pp. 1615-1618 ◽  
Author(s):  
G.M Kalinin ◽  
B.S Rodchenkov ◽  
V.A Pechenkin
Keyword(s):  
Structural Design ◽  
Design Criteria

The Measurement of Light Element Segregation Using EDS and EELS

1998 ◽  
Vol 4 (S2) ◽  
pp. 772-773
Author(s):  
J.T. Busby ◽  
E.A. Kenik ◽  
G.S. Was
Keyword(s):  
Grain Boundaries ◽  
Nuclear Reactor ◽  
Reactor Core ◽  
Light Element ◽  
Free Surfaces ◽  
Spatial Redistribution ◽  
Core Components ◽  
Radiation Induced ◽  
Potential Interactions ◽  
Impurity Elements

Radiation-induced segregation (RIS) is the spatial redistribution of elements at defect sinks such as grain boundaries and free surfaces during irradiation. This phenomenon has been studied in a wide variety of alloys and has been linked to irradiation-assisted stress corrosion cracking (IASCC) of nuclear reactor core components. However, several recent studies have shown that Cr and Mo can be enriched to significant levels at grain boundaries prior to irradiation as a result of heat treatment. Segregation of this type may delay the onset of radiation-induced Cr depletion at the grain boundary, thus reducing IASCC susceptibility. Unfortunately, existing models of segregation phenomena do not correctly describe the physical processes and therefore are grossly inaccurate in predicting pre-existing segregation and subsequent redistribution during irradiation. Disagreement between existing models and measurement has been linked to potential interactions between the major alloying elements and lighter impurity elements such as S, P, and B.

scholarly journals Mechanical analysis of sealing performance for compression packer rubber tube

2018 ◽  
Vol 19 (3) ◽  
pp. 309 ◽  
Author(s):  
Fuying Zhang ◽  
Xiangmin Jiang ◽  
Honghao Wang ◽  
Nana Song ◽  
Jianlei Chen ◽  
...  
Keyword(s):  
Structural Design ◽  
Mechanical Analysis ◽  
Deformation Analysis ◽  
Rubber Tube ◽  
Support Ring ◽  
Sealing Performance ◽  
Deformation Stages ◽  
Core Components ◽  
Sealing Mechanism ◽  
Sealing Pressure

The compression packer rubber is one of the core components of the packer. According to the sealing mechanism of the compression packers rubber, the deformation of rubber between the central tube and casing tube is analyzed in the initial and working stages. The compression rubber is also strained radially against the support ring by means of a controlled tubular expansion process. In this paper, the theoretical model for the deformation analysis is established by the structure and working characteristics of rubber tube. In addition, the nonlinear relationship between the material, geometry and stress in the constrained and stable deformation stages is analyzed by application of pressure methods. The analytical results show the contact pressure and shear stress distribution on the sealing surface of the rubber and the effect of rubber geometry and its material properties on sealing performance in terms of maximum sealing pressure. Then, the criterion of sealing performance evaluation of the rubber is established by the numerical results. This analytical model will provide a theoretical basis and guidance for the structural design of the compression packer rubber and it will be of great significance to improve the sealing performance and reliability of packer rubber.

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