Criticality Safety Calculation Package for Fuel Transport and Storage Systems

Karin Rantamäki

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review


Criticality safety assessments require sensitivity analyses which can be quite tedious if preformed manually. In order to reduce manual work and facilitate sensitivity studies, a calculation package has been set up. The package is built around MCNP which is used for the criticality calculations. The package consists of a data transfer and analysis program written in perl, and a set of skeletal inputs, called here models, for the fuel transport and storage systems including the fuel assembly. The models contain all the details for the assembly and the storage system. Some values in the models are replaced by keywords for the parameter. Values for the keywords are given in the input of the package and the keywords in the models are replaced by the appropriate value in the actual inputs for the MCNP runs. The package gives an easy and time-saving way to make a lot of criticality calculations with only small modifications to the inputs. Currently the models cover the transport and storage systems of Loviisa NPP. In principal, the package could be used to analyze any transport or storage system as long as a model for the specific system is constructed. In this paper, the usability is demonstrated with two different storage systems.
Original languageEnglish
Title of host publicationTopical Meeting held by the ANS Nuclear Criticality Safety Division (NCSD 2013)
Subtitle of host publicationCriticality Safety in the Modern Era: Raising the Bar
Place of PublicationLaGrange Park
PublisherAmerican Nuclear Society (ANS)
ISBN (Electronic)978-0-89448-703-3
ISBN (Print)978-1-62993-816-5
Publication statusPublished - 2013
MoE publication typeA4 Article in a conference publication
EventNCSD 2013 Criticality Safety in the Modern Era: Raising the Bar - Wilmington, NC, United States
Duration: 29 Sept 20133 Oct 2013


ConferenceNCSD 2013 Criticality Safety in the Modern Era: Raising the Bar
Abbreviated titleNCSD 2013
Country/TerritoryUnited States
CityWilmington, NC


  • MCNP
  • criticality analysis
  • fuel storage


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