عنوان مقاله [English]
نویسنده [English]چکیده [English]
Monitoring of power distribution in reactor core is one of the most challenging issues in the safe operation of nuclear reactors. Number and placement of detectors in a core monitoring system should be determined in a way that maximum information about core states is extracted, while avoiding duplication of similar and correlated measurements. Information theory is the best method to deal with the problem of optimal number and placement of instruments. In this paper, effects of reactor fuel burn-up on optimal number and placement of in-core fixed detectors of Tehran research reactor are evaluated using information theory. Comparison of the results with and without consideration of the fuel burn-up shows that by considering fuel burn-up in the placement problem, more information can be extracted by measurements of the detectors. Also, for same number of the detectors, placements which are determined by considering fuel burn-up, mostly provide larger share of total available information in the data set. With the determined optimal placement, maximum information can be gathered by minimum number of the detectors, which leads to considerable decrease in the cost of construction, implementation, operation, and maintenance of the in-core detectors for monitoring of neutron flux.