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This paper considers the fuelling the core of a light water reactor (LWR) with assemblies of standard and inert matrix based Pu fuels such that there is no net rate of Pu production. The Pu in the inert matrix fuel is obtained by recycling that from spent UO(2) fuel. The Pu produced in the standard UO(2) assemblies during reactor operation is then balanced by the Pu burnt in the inert matrix assemblies. This can be achieved by replacing approximately one fifth of the standard assemblies with inert matrix based Pu assemblies. Extended irradiation of the inert matrix assemblies is also considered. Calculations are presented for a homogeneous core containing standard and inert matrix assemblies at various stages of irradiation. On this basis, it is suggested that the large variations in k (infinity) associated with individual assemblies of inert matrix based Pu in a LWR neutron spectrum can be considerably reduced by a suitable choice of the cycle loading pattern for the assemblies.

Additional information

Authors: MAGILL J, JRC Karlsruhe (DE);PEERANI P, JRC Karlsruhe (DE);MATZKE H, JRC Karlsruhe (DE);VAN GEEL J, JRC Karlsruhe (DE)
Bibliographic Reference: Paper presented: IAEA Technical Committee Meeting on Advanced Fuels with reduced Actinide Generation, Vienna (AT), November 21-23, 1995
Availability: Available from (1) as Paper EN 39583 ORA
Record Number: 199610409 / Last updated on: 1996-04-15
Original language: en
Available languages: en
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