ICONE19-43807 SAFETY ASPECTS OF VERY HIGH TEMPERATURE REACTOR CORE DESIGN

2011 ◽  
Vol 2011.19 (0) ◽  
pp. _ICONE1943-_ICONE1943
Author(s):  
Chang-Yong Jin ◽  
Changwook Huh ◽  
Ku Young Chung ◽  
Hyun Dae Kim
Keyword(s):  
High Temperature ◽  
Reactor Core ◽  
Safety Aspects ◽  
Very High Temperature Reactor ◽  
High Temperature Reactor ◽  
Very High

Air Ingress Phenomena in a Depressurization Accident of the Very-High-Temperature Reactor

2008 ◽  
Author(s):  
Tetsuaki Takeda
Keyword(s):  
High Temperature ◽  
Natural Circulation ◽  
Reactor Core ◽  
Fission Products ◽  
Design Criterion ◽  
Very High Temperature Reactor ◽  
High Temperature Reactor ◽  
Air Ingress ◽  
High Degree ◽  
Very High

The inherent properties of the Very-High-Temperature Reactor (VHTR) facilitate the design of the VHTR with high degree of passive safe performances, compared to other type of reactors. However, it is still not clear if the VHTR can maintain a passive safe function during the primary-pipe rupture accident, or what would be a design criterion to guarantee the VHTR with the high degree of passive safe performances during the accident. The primary-pipe rupture accident is one of the most common of accidents related to the basic design regarding the VHTR, which has a potential to cause the destruction of the reactor core by oxidizing in-core graphite structures and to release fission products by oxidizing graphite fuel elements. It is a guillotine type rupture of the double coaxial pipe at the nozzle part connecting to the side or bottom of the reactor pressure vessel, which is a peculiar accident for the VHTR. This study is to investigate the air ingress phenomena and to develop the passive safe technology for the prevention of air ingress and of graphite corrosion. The present paper describes the influences of a localized natural circulation in parallel channels onto the air ingress process during the primary-pipe rupture accident of the VHTR.

Neutronic design of a very high temperature reactor core with low graphite content

2013 ◽  
Vol 55 ◽  
pp. 71-74 ◽  
Author(s):  
Dionisio Telésforo-Reyes ◽  
Juan-Luis François ◽  
Cecilia Martín-del-Campo ◽  
Arturo G. Reinking-Cejudo
Keyword(s):  
High Temperature ◽  
Reactor Core ◽  
Graphite Content ◽  
Very High Temperature Reactor ◽  
High Temperature Reactor ◽  
Very High

scholarly journals Characterization of 2D-C/C Composite for Application of Very High Temperature Reactor(M & M 2009 Conference)

2010 ◽  
Vol 76 (764) ◽  
pp. 383-385 ◽  
Author(s):  
Taiju SHIBATA ◽  
Junya SUMITA ◽  
Taiyo MAKITA ◽  
Takashi TAKAGI ◽  
Eiji KUNIMOTO ◽  
...  
Keyword(s):  
High Temperature ◽  
Special Issue ◽  
Very High Temperature Reactor ◽  
High Temperature Reactor ◽  
Very High

A Techno-Economic Optimization of the Power Conversion System of a Very High Temperature Reactor

2006 ◽  
Author(s):  
Christine Mansilla ◽  
Michel Dumas ◽  
Franc¸ois Werkoff
Keyword(s):  
High Temperature ◽  
Power Conversion ◽  
Minimum Cost ◽  
Production Costs ◽  
Total Production ◽  
Economic Optimization ◽  
Very High Temperature Reactor ◽  
Conversion System ◽  
High Temperature Reactor ◽  
Very High

Generation IV nuclear reactors will not be implemented unless they enable lower production costs than with the current systems. In such a context a techno-economic optimization method was developed and then applied to the power conversion system of a very high temperature reactor. Techno-economic optimization consists in minimizing an objective function that depends on technical variables and economic ones. The advantage of the techno-economic optimization is that it can take into account both investment costs and operating costs. A techno-economic model was implemented in a specific optimization software named Vizir, which is based on genetic algorithms. The calculation of the thermodynamic cycle is performed by a software named Tugaz. The results are the values of the decision variables that lead to a minimum cost, according to the model. The total production cost is evaluated. The influence of the various variables and constraints is also pointed out.

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