Current fuel safety criteria

1 January 2000

Current fuel safety criteria
Safety related criteria Category* New elements affecting criteria
CPR/DNBR A, B, C 1, 2, 5, 6, 7, 9
Reactivity coefficient B, C 2, 5, 6, 7, 8, 9
Shutdown margin A, B, C 1, 2, 5, 6, 7, 8, 11
Enrichment A, B, C 1, 2, 5
Crud deposition A 1, 2, 3, 4, 5, 7, 10
Strain level A, B 1, 3, 4, 7, 8
Oxidation A, B, C 3, 4, 7, 8, 10
Hydride concentration A, B, C 3, 4, 7, 8, 10
Internal gas pressure A, B, C 1, 5, 6, 7, 8
Thermal-mechanical loads A, B 1, 3, 4, 7
PCI A, B, C 1, 2, 3, 4, 6, 7, 8, 11
Fuel fragmentation (RIA) C 7, 8
Fuel failure (RIA) C 1, 3, 4, 7, 8
Cladding embrittlement/PCT    
(non-LOCA runaway oxidation) C 3, 4, 7, 8
Cladding embrittlement/oxidation C 3, 4, 7, 8
Blowdown/seismic loads C 3, 7
Assembly holddown force A, B, C 1, 11
Coolant activity A, B, C 5, 6, 7, 8
Gap activity C 5, 6, 7, 8
Source term C 5, 6, 7, 8
     
     
1 New fuel designs; 2 New core designs; 3 New cladding materials; 4 New manufacturing procedures; 5 Long fuel cycle; 6 Uprated power; 7 High burnup; 8 MOX; 9 Mixed core; 10 Water chemistry changes; 11 Current/new operating practices.
* A: normal operation; B: anticipated transients; C: postulated accidents



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