Graduate Thesis Or Dissertation
 

An evaluation of a neutron "flux trap" control scheme for pressurized water reactors

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https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/ff3658884

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  • Pressurized water reactors are presently controlled by the use of materials which absorb neutrons as their only effect; this reduces the neutron economy of the system, since these neutrons are lost without helping to maintain the chain reaction. The system examined in this study replaces these absorbing materials with a combination of a neutron "flux trap" and an absorbing ring of fertile material to improve the neutron economy by using these absorbed neutrons to produce new fuel atoms. The scope of this study is to find optimal sizes for this absorbing ring and for the whole "supercell," consisting of the neutron "flux trap," absorbing ring, and the standard fuel pins making up the rest of the fuel region. The criteria for these optimal sizes are based on the control of the effective multiplication factor achievable for the system and the lifetime of the system.
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