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DEVELOPMENT OF THE PROCESS FLOW DIAGRAM OF THE PYROCHEMICAL REPROCESSING OF SPENT NITRIDE FUEL FOR ADS
ACTINIDE AND FISSION PRODUCT PARTITIONING AND TRANSMUTATION, ISBN 978-92-64-99174-3, © OECD 2012 1
Development of the process flow diagram of the pyrochemical reprocessing of spent nitride fuel for ADS
Abstract
DEVELOPMENT OF THE PROCESS FLOW DIAGRAM OF THE PYROCHEMICAL REPROCESSING OF SPENT NITRIDE FUEL FOR ADS
2 ACTINIDE AND FISSION PRODUCT PARTITIONING AND TRANSMUTATION, ISBN 978-92-64-99174-3, © OECD 2012
Introduction
Development of the process flow diagrams
DEVELOPMENT OF THE PROCESS FLOW DIAGRAM OF THE PYROCHEMICAL REPROCESSING OF SPENT NITRIDE FUEL FOR ADS
ACTINIDE AND FISSION PRODUCT PARTITIONING AND TRANSMUTATION, ISBN 978-92-64-99174-3, © OECD 2012 3
Figure 1: A process flow diagram of the nitridation of MA from the commercial reactor fuel cycle
Currently-proposed process with the molten salt electrorefining of spent nitride fuel
Figure 2: A process flow diagram of the currently-proposed process with the molten salt electrorefining of spent nitride fuel
Multi-stage
counter current
extraction
Removal of FP
(zeolite column)
Back
extraction
An-Cd
Cd
Ceramic
waste
Alkalis
Alkaline earths
Rare earths
Recycling process of the molten salt in the electrorefiner
Molten salt
electrorefining
Spent
nitride fuel
Chemical
dissolution
Renitridation
Metal waste Nitride
product 2
Reductive
extraction
Cd cathode
(An-Cd)
Anode
residues
Nitride
product 1
Renitridation
Cladding hulls
Noble metals
Inert matrix
Salt
Processing of the anode residues
An-Cd
Refined salt
(LiCl-KCl)
Spent salt
(LiCl-KCl+FP)
Refined salt
(LiCl-KCl+An)
Spent salt
(LiCl-KCl+An,FP)
MA oxides from commercial reactor
fuel cycle
Carbothermic reduction
MA nitrides
15N gas
DEVELOPMENT OF THE PROCESS FLOW DIAGRAM OF THE PYROCHEMICAL REPROCESSING OF SPENT NITRIDE FUEL FOR ADS
4 ACTINIDE AND FISSION PRODUCT PARTITIONING AND TRANSMUTATION, ISBN 978-92-64-99174-3, © OECD 2012
↑
The process with the chemical dissolution of spent nitride fuel and molten salt electrorefining of the actinide-cadmium alloy
The process combining the chemical dissolution of spent nitride fuel and the multi-stage counter current extraction
DEVELOPMENT OF THE PROCESS FLOW DIAGRAM OF THE PYROCHEMICAL REPROCESSING OF SPENT NITRIDE FUEL FOR ADS
ACTINIDE AND FISSION PRODUCT PARTITIONING AND TRANSMUTATION, ISBN 978-92-64-99174-3, © OECD 2012 5
Figure 3: A process flow diagram of the process with the chemical dissolution of spent nitride fuel and molten salt electrorefining of the actinide-cadmium alloy
Refined salt
(LiCl-KCl+An)
Spent nitride fuel
Chemical
dissolution
Metal waste
Reductive
extraction
Cd cathode (An-Cd)
Nitride
product 1 Re-nitridation
Cladding hulls Noble metals
Inert matrix
An-Cd+FP
Nitride product 2
Re-nitri-
dation
Molten salt electrorefining
Anode residues (An-Cd)
Multi-stage counter current
extraction
Back
extraction
An-Cd
Cd
Spent salt (LiCl-KCl+An,FP)
Ceramic
waste
Alkalis Alkaline earths
Rare earths
Cd
Refined salt
(LiCl-KCl) Spent salt
(LiCl-KCl+FP)
Salt (LiCl-KCl
+An,FP)
Removal of FP (zeolite column)
Figure 4: A process flow diagram of the process combining the chemical dissolution of spent nitride fuel and the multi-stage counter current extraction
Material balance calculation
Spent nitride
fuel
Chemical dissolution
Metal waste
Nitride product
Re-nitridation
Cladding hulls noble metals inert matrix
Multi-stage counter current
extraction
An-Cd
Ceramic waste Alkalis
Alkaline earths Rare earths
Refined salt (LiCl-KCl)
Salt (LiCl-KCl +An,FP)
Salt (LiCl-KCl+FP)
Removal of FP (zeolite column)
DEVELOPMENT OF THE PROCESS FLOW DIAGRAM OF THE PYROCHEMICAL REPROCESSING OF SPENT NITRIDE FUEL FOR ADS
6 ACTINIDE AND FISSION PRODUCT PARTITIONING AND TRANSMUTATION, ISBN 978-92-64-99174-3, © OECD 2012
Summary
DEVELOPMENT OF THE PROCESS FLOW DIAGRAM OF THE PYROCHEMICAL REPROCESSING OF SPENT NITRIDE FUEL FOR ADS
ACTINIDE AND FISSION PRODUCT PARTITIONING AND TRANSMUTATION, ISBN 978-92-64-99174-3, © OECD 2012 7
Fig
ure
5:
A m
ate
rial
bala
nc
e s
heet
of
the p
yro
ch
em
ica
l re
pro
cessin
g o
f sp
en
t n
itri
de f
uel
for
AD
S (
thro
ug
hp
uts
per
day
)
DEVELOPMENT OF THE PROCESS FLOW DIAGRAM OF THE PYROCHEMICAL REPROCESSING OF SPENT NITRIDE FUEL FOR ADS
8 ACTINIDE AND FISSION PRODUCT PARTITIONING AND TRANSMUTATION, ISBN 978-92-64-99174-3, © OECD 2012
References
DEVELOPMENT OF THE PROCESS FLOW DIAGRAM OF THE PYROCHEMICAL REPROCESSING OF SPENT NITRIDE FUEL FOR ADS
ACTINIDE AND FISSION PRODUCT PARTITIONING AND TRANSMUTATION, ISBN 978-92-64-99174-3, © OECD 2012 9