Four Years Re-Use of Low Burned Fuel Assemblies from Units 1&2 in Core Loadings of Units 3&4 WWER-440 at Kozloduy NPP
16th Symposium of AER on VVER Reactor Physics and Reactor Safety (2006, Bratislava, Slovakia)
Fuel Management
Abstract
At the end of 2002 Units 1 and 2 of Kozloduy NPP were shutdown before their design life time which left a large number of assemblies yet with a significant energy resources. A decision to load these assemblies into the cores of Units 3 and 4 during the next 4 cycles has been taken.
In 2003, 43 assemblies from Unit 1 cycle 23rd and 55 assemblies from Unit 2 cycle 24th are loaded in the cores of Units 3 and 4 respectively.
In 2004, new 49 assemblies from Unit 1 cycle 23rd and new 55 assemblies from Unit 2 cycle 24th are loaded in the cores of Units 3 and 4 respectively.
In 2005, the next new 25 assemblies from Unit 1 cycle 23rd and 66 assemblies from Unit 2 cycle 24th are loaded in the cores of Units 3 and 4 respectively.
In 2006, the next new 54 assemblies from Unit 1 cycle 23rd and 52 assemblies from Unit 2 cycle 24th + 2 assemblies from Unit 3 cycle 19th are loaded in the cores of Units 3 and 4 respectively.
The SPPSHB computer code system is used for development and safety assessment of the fuel loading patterns of Units 3&4 at Kozloduy NPP with low burned assemblies from Units 1&2.