COMPLETE DOCUMENT (1862 kb) - OECD Nuclear Energy Agency

Figure1.5 A notional materials flowsheet for a 700-TWh FR park
(an example calculated by JNC, Japan)
Depleted
uranium
for MOX
571 t-U
MOX
Fabrication
626 t-U
FBR reactors 700 TWh
Transport
to
reprocessing
573 t-HM
Reprocessing
573 t-HM
Pu Storage
for other FBRs
11 t-Pu
Depleted
REP U
495 t-U
Pu
55 t-Pu
3.1.1 Once-Through Fuel Cycle (OTC)
The OTC is the scenario by which all spent fuel discharged from a nuclear reactor is stored in
engineered facilities till sufficiently cooled to be transferred to a permanent disposal site in deep
geological formations.
3.1.2 Reprocessing Fuel Cycle (RFC)
The RFC scenario incorporates the reprocessing step which aims at the recovery of uranium
and plutonium from dissolved fuel elements and the transfer of FPs and MAs (Np, Am, Cm) to the
High-Level Liquid Waste (HLLW) which is stored for a number of years until vitrification of this
highly active solution. The glass-blocks are stored in engineered facilities until their transfer as HLW to
a geological repository.
3.1.3 Advanced Fuel Cycle with TRU and selected FP recycling (AFC)
The AFC is a series of chemical, metallurgical and nuclear operations by which all the
actinides (Pu, Am, Cm, Np) and some selected fission products ( 99 Tc, 129 I) are separated from the main
stream and recycled as targets into the NPPs or into dedicated nuclear reactors and/or ADSs to obtain a
significant reduction of their radiotoxic inventory.
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