Criticality safety analysis for GNS IQ® – The Integrated Quiver System for damaged fuel

Kerntechnik ◽  
2019 ◽  
Vol 84 (4) ◽  
pp. 340-345
Author(s):  
M. Chernykh ◽  
D. Amian ◽  
S. Tittelbach ◽  
A. Bannani ◽  
W. Cebula ◽  
...  
Keyword(s):  
Safety Analysis ◽  
Criticality Safety

A study of burnup credit in criticality safety analysis for PBR spent fuel pebbles

2019 ◽  
Vol 132 ◽  
pp. 347-356 ◽  
Author(s):  
Shang-Chien Wu ◽  
Der-Sheng Chao ◽  
Jenq-Horng Liang
Keyword(s):  
Safety Analysis ◽  
Spent Fuel ◽  
Criticality Safety

Criticality safety analysis for a core catcher designed in Korea

2012 ◽  
Vol 59 ◽  
pp. 66-74 ◽  
Author(s):  
Song Hyun Kim ◽  
Chang Ho Shin ◽  
Hong-Chul Kim ◽  
Jong Kyung Kim ◽  
Jin Ho Song ◽  
...  
Keyword(s):  
Safety Analysis ◽  
Core Catcher ◽  
Criticality Safety

scholarly journals CRITICALITY SAFETY ANALYSIS OF GBC-32 SPENT FUEL CASK WITH IMPROVED NEUTRON ABSORBER CONCEPT

2021 ◽  
Vol 247 ◽  
pp. 17003
Author(s):  
Martin Lovecký ◽  
Jiří Závorka ◽  
Jana Jiřičková ◽  
Radek Škoda
Keyword(s):  
Fuel Assembly ◽  
Boron Content ◽  
High Efficiency ◽  
Safety Analysis ◽  
Spent Fuel ◽  
Neutron Absorber ◽  
Safety Margins ◽  
Absorber Material ◽  
Inner Diameter ◽  
Criticality Safety

Higher enrichment of nuclear fuel along the manufacturing limit of boron content in steel and aluminum alloys represents a significant challenge in designing spent fuel transport and storage facilities. One possible solution for spent fuel pools and casks is the burnup credit method that allows for decreasing very high safety margins associated with fresh fuel assumption in spent fuel facilities. An alternative solution based on placing neutron absorber material directly into the fuel assembly is proposed here. A neutron absorber permanently fixed in guide tubes decreases system reactivity more efficiently than absorber sheets between the assemblies. The efficiency of the newly proposed concept is demonstrated on the criticality safety analysis of the GBC-32 spent fuel cask. Absorber rods from 8 different elements are placed within Westinghouse OFA 17x17 guide tubes. Currently used boron is a good option because of high absorption cross section, low atomic mass and chemical compatibility with various alloys. Alternative options (e.g., Sm, Eu, Gd, Dy, Hf, Re, Ir) are based on very good absorbers that do not require alloy compatibility since the absorbers can be placed inside zirconium or steel cladding. Because of high efficiency of the newly proposed absorber concept, boron content in BORAL sheets can be decreased to more competitive economics. Moreover, fuel assembly pitch is investigated in order to change cask wall inner diameter that will result in lower material consumption for the cask wall with the same shielding thickness.

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