Development and Verification of Nuclear Calculation Methods for ...

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7. CEB, A Cell Burn-up Programme 37
7.1. The Isotopic Burn-up Method 37
7. 2. The Burn-up Procedure BURN , 38
7.3. The CEB Programme 40
8. CDB, A Combined Cell Collision Probability and Over-all
Diffusion Theory Burn-up Programme 42
8.1. The Local - Global Coupling Method 42
8. 2. Non-Uniform Doppler and Dancoff Effects 45
8.3. The CDB Programme 47
9. Verification; Calculations Compared with Measurements for
the Yankee Reactor 49
9.1. Description of the Yankee Core 49
-—__9 JL 2. Fuel Sample Measurements 50
10. Unit Cell Calculations 52
10.1. Unit Cell Description 52
10. 2. Treatment of Fission Products 52
10.3. Calculation Procedure 53
10.4. Reactivity Characteristics 54
10.5. Isotopic Abundances 55
10.6. Isotopic Concentrations 56
11. Over-all Calculations 57
11.1. Quarter Core and Assembly Descriptions 58
11.2. Treatment of Non-Fuel Regions 58
11.3. Calculation Procedure 60
11.4. Reactivity Conditions 61
11.5. Assembly Average Burn-ups and Isotopic Inventories .. 62
11.6. Isotopic Distributions Across Some Assemblies 63
11.7. Isotopic Inventories of Selected Fuel Rods 67
12. Single Assembly Calculations 69
12.1. Calculation Procedure 69
12.2. Isotopic Distributions Across the Assembly 70
12.3. Plutonium Build-up in Centre and Corner Rods 71
12.4. Isotonic Inventories of Selected Fuel Rods 74