National Ignition Facility sub-system design requirements integrated safety systems SSDR 1.5.4

This paper introduces the basic principle, the compost system design requirements, and to introduce biodegradable composting system and design. At the same time design the structure and layout of a small biodegradable compost pool. Base on introducing the small turning device to complete a small spiral turning device of the mechanical system design.

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An Optimization Based Methodology to Design Flexible Systems Subjected to Changing Operating Conditions

Volume 2: 31st Design Automation Conference, Parts A and B ◽

10.1115/detc2005-85147 ◽

2005 ◽

Cited By ~ 1

Author(s):

Ritesh A. Khire ◽

Anoop A. Mullur ◽

Achille Messac

Keyword(s):

Optimal Design ◽

System Design ◽

High Performance ◽

Systematic Approach ◽

Operating Conditions ◽

Flexible Systems ◽

Operating Life ◽

Design Requirements ◽

High Performance Level ◽

Critical Aspects

Flexible systems maintain a high performance level under changing operating conditions or design requirements. Flexible systems acquire this powerful feature by allowing critical aspects of their design con guration to change during the operating life of the product or system. In the design of such systems, designers are often required to make critical decisions regarding the exible and the non-exible aspects of the design con guration. We propose an optimization based methodology to design exible systems that allows a designer to effectively make such critical decisions. The proposed methodology judiciously generates candidate optimal design versions of the exible system. These design versions are evaluated using multiobjective techniques in terms of the level of exibility and the associated penalty. A highly exible system maintains optimal performance under changing operating conditions, but could result in increased cost and complexity of operation. The proposed methodology provides a systematic approach for incorporating designer preferences and selecting the most desirable design version — a feature absent in several recently proposed exible system design frameworks. The developments of this paper are demonstrated with the help of a exible three-bar-truss design example.

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Preliminary Study of the Application of PEFS on PCWA

Volume 3: Nuclear Safety and Security; Codes, Standards, Licensing and Regulatory Issues; Computational Fluid Dynamics and Coupled Codes ◽

10.1115/icone21-15034 ◽

2013 ◽

Author(s):

Jianhua Cao ◽

Xiangang Fu ◽

Xianghui Lu ◽

Xiaohua Jiang

Keyword(s):

System Design ◽

Steam Generator ◽

Nuclear Power ◽

Safety System ◽

Plant Design ◽

Active Safety Systems ◽

Preliminary Study ◽

Environmental Goals ◽

Safety Features ◽

Safety Systems

Developing the advanced nuclear power plant design to meet the demanding safety, efficiency and environmental goals of electric utilities requires great efforts. A passive emergency feedwater system (PEFS) combined with other passive engineering safety features (PESF) is introduced into PCWA (Passive Combined With Active) designs. The typical accidents are calculated and analyzed for this safety system design, especially steam generator tube rupture (SGTR). It is preliminarily concluded that this safety system design in PCWA makes a great balance between passive and active safety systems, and no radioactive liquid was released to the environment except some steam from affected steam generator.

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