• 1. What are the advantages of chemical shim over fixed burnable poisons? What are the advantages of fixed burnable poisons over chemical shim?
• 2. Explain all of the Xe-135 production mechanisms in an operating nuclear reactor.
• 3. Describe how equilibrium Sm-149 concentration varies with reactor power level.
• 4. Describe the difference between a grey neutron absorbing material and a black neutron absorbing material.  Why could a grey neutron absorbing material control rod be preferred over a black neutron absorbing material control rod? 

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1 Advantages of Chemical Shim vs Fixed Burnable Poisons Chemical Shim Boron System Flexibility Boron concentration in the coolant can be adjusted onli... View the full answer