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Enrico Fermi Fast Reactor Spent Nuclear Fuel Criticality Calculations: Degraded Mode

Horia R. Radulescu
Jorge Monroe-Rammsy
Laetitia Angers
Dionisie R. Moscalu
Publication Date


The objective of this calculation is to characterize the nuclear criticality safety concerns
associated with the codisposal of the Department of Energy’s (DOE) Enrico Fermi (EF) Spent
Nuclear Fuel (SNF) in a 5-Defense High-Level Waste (5-DHLW) Waste Package (WP) and
placed in a Monitored Geologic Repository (MGR). The scope of this calculation is limited to
the determination of the effective neutron multiplication factor (keff) for the degraded mode
internal configurations of the codisposal WP. The results of this calculation and those of Ref. 8
will be used to evaluate criticality issues and support the analysis that will be performed to
demonstrate the viability of the codisposal concept for the Monitored Geologic Repository.
This calculation is associated with the waste package design and was performed in accordance
with the DOE SNF Analysis Plan for FY 2000 (See Ref. 22). The document has been prepared in
accordance with the Administrative Procedure AP-3.12Q, Revision 0, ICN 2, Calculations (Ref.

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