Theoretical Derivation of Simplified Evaluation Models for the First Peak of a Criticality Accident in Nuclear Fuel Solution

2000 ◽  
Vol 131 (1) ◽  
pp. 12-21 ◽  
Author(s):  
Yasushi Nomura
Keyword(s):  
Nuclear Fuel ◽  
Theoretical Derivation ◽  
Criticality Accident ◽  
Evaluation Models

Development of Criticality Accident Alarm System to Ensure Safe Retrieval of Spent Nuclear Fuel from Lepse Floating Maintenance Base

ANRI ◽  
2020 ◽  
pp. 45-53
Author(s):  
A. Lachugin ◽  
M. Kocherygin ◽  
A. Gayazov ◽  
Yury Martynyuk ◽  
A. Vasil'ev
Keyword(s):  
System Design ◽  
Nuclear Fuel ◽  
Spent Nuclear Fuel ◽  
Alarm System ◽  
Criticality Accident ◽  
Hazardous Area ◽  
Key Features

The paper presents basic results of development of a criticality accident alarm system to ensure safe retrieval of the spent nuclear fuel from the Lepse Floating Maintenance Base. The key features and engineering aspects of the system design are described. Locations of criticality detector units and selected alarm level settings are justified, hazardous area boundaries were identified, and parameters to identify inadequately protected zones were calculated. The SRKS-01D criticality accident alarm system by SPC “Doza” was selected as base equipment. The system was commissioned in 2019 and has been successfully operated for more than 6 months.

Simplified Evaluation Models for Total Fission Number in a Criticality Accident

1995 ◽  
Vol 109 (1) ◽  
pp. 142-152 ◽  
Author(s):  
Yasushi Nomura ◽  
Hiroshi Okuno
Keyword(s):  
Criticality Accident ◽  
Evaluation Models
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