Induced nuclear reactions: processes – systems – and elements – Testing – sensing – measuring – or detecting a fission reactor... – By particular instrumentation circuitry
Patent
1997-07-21
1998-08-04
Wasil, Daniel D.
Induced nuclear reactions: processes, systems, and elements
Testing, sensing, measuring, or detecting a fission reactor...
By particular instrumentation circuitry
376267, G21C 1700
Patent
active
057906181
ABSTRACT:
A method and system for identifying the maximum adverse impact of a mislocated nuclear fuel bundle placement in an nuclear core loading arrangement is presented. The method generally has an initialization phase and a "swap" case evaluation, or "search," phase. In the initialization phase, base conditions for a selected core loading arrangement are determined and parameters for exploring the mislocated fuel bundle loading error problem are set up. In the search phase, the core loading arrangement design space is explored for many combinations of mislocated fuel bundle pairs in order to find a mislocated fuel bundle pair that yields the most limiting core state. A computer system is used to execute specific program routines that simulate the operating conditions of a reactor having mislocation errors involving fuel bundle pairs in a core loading arrangement. The routines also analyze the resultant changes in operating conditions for each simulation with respect to a desired loading arrangement and/or preselected limits on design constraints to determine the impact of the mislocation error. A "search" for the mislocation error that produces the greatest impact is conducted by simulating a large number of possible mislocation errors which could occur within the particular design space for the core and comparing the relative impact of each case. Two search variables representing mislocated fuel bundles are used to test localized combinations of mislocated fuel bundles within the design space. The search variables are initialized to values corresponding to an arbitrary pair of bundles and search parameters are set up to implement a particular search strategy.
REFERENCES:
patent: 5272736 (1993-12-01), Wolters, Jr. et al.
patent: 5631939 (1997-05-01), Haraguchi et al.
General Electric Company
Wasil Daniel D.
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