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Draft report
This report provides a preliminary understanding of the differences in core damage risk profiles predicted by the Level 1 PRA studies of two similar VVER-1000 NPPs, the Novovoronezh Unit 5, Model V-187, and the South Ukraine Unit 1, Model V-302. A major objective of these studies was to identify the main contributors to core damage frequency and to identify plant vulnerabilities. This study presents a comparison of the main initiating event group contributors to core damage frequency. The comparison was made using the final summary reports of the two projects.
Detailed
Fuel and cladding
| Fuel | UO2 pellet |
| Cladding | Zr/1%Nb |
| Enrichment | Initial: 3.0/4.4 % |
| Pellet Outer Diameter | 7.57 mm |
| Pellet Inner Diameter | 1.4/1.6 mm |
| Clad Thickness | 0.65 mm |
| Pin Height | 3840 mm |
| Pin Outside Diameter | 9.1 mm |
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Fuel Assemblies
| Number of Rods per Assembly | 317 |
| Fuel Rod Pitch | 384 cm |
| Fuel Assembly Pitch | 467 cm |
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Core Configuration
| Active Core Height | 3.56 m |
| Active Core Diameter | 3.12 m |
| Average Burnup | 40000 MWd/tU |
| Reactivity Control | Boric Acid |
| Number of Fuel Assemblies | 151 |
| Configuration of Assemblies | Hex |
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Control System
| Control Rod Drive Type | el/mag |
| Number of Control Rods Assemblies | 109 |
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Primary Coolant
| Coolant Material | H2O |
| Pressure at Exit from Core | 6.0 MPascals |
| Core Inlet Temperature | 289 deg C |
| Core Outlet Temperature | 322 deg C |
| Number of Primary Pumps | 4 |
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Coolant Systems
| Number of Loops | 4 |
| Water Chemistry | --- |
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Turbines
| Number of Turbines | 1 |
| Turbine Speed | 1500 rev/min |
| Turbine Rating | 1000 MWe |
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Vessel and Containment
| Vessel Material | 15X2NMFA |
| Height | 10.88 m |
| Weight | 304 tonnes |
| Inner Diameter | 4.07 m |
| Wall Thickness | 0.19 m |
| Nozzle Diameter | 0.85 m |
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Reactor Operations
| Fuel Loading | --- |
| Operational Strategy | --- |
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Spent Fuel Management
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Last modyfied: 28.02.2001
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Please contact the
webauthor
if any questions
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