MONTE-CARLO SHIELDING ANALYSIS USING DEEP PENETRATION BIASING SCHEMES COMBINED WITH POINT ESTIMATORS AND ALGORITHMS FOR THE SCORING OF SENSITIVITY PROFILES AND FINITE PERTURBATION EFFECTS
The first part of the paper contains a review of two Monte Carlo perturbation and sensitivity methods and includes an error analysis of the estimators. By the use of the Neumann series it can be proved that both methods are based on closely related sampling schemes in which the Taylor series approach is a first-order approximation of correlated tracing. They make possible, with equivalent programming and computing effort, the simultaneous calculation of different types of perturbations and sensitivity profiles. The fact that correlated tracking is not limited to first-order effects makes it attractive for all applications in which larger perturbations have to be considered, provided that certain restrictions caused by singularities of the variance are being taken into account. New developments in combining the sensitivity and perturbation algorithm with a deep penetration biasing scheme and point estimators are discussed and illustrated by typical applications to design studies. In particular, neutron streaming through annular gaps around tubes in the sacrificial shield of a BWR was analyzed and compared with measurements obtained from the Caorso (840 MW) Nuclear Power Plant.
Bibliographic Reference: 6TH INTERNATIONAL CONFERENCE ON RADIATION SHIELDING, TOKYO (JAPAN), MAY 16-20, 1983 - WRITE TO CEC LUXEMBOURG, DG XII/A2, POB 1907 MENTIONING PAPER E 30866 ORA
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Record Number: 1989122028600 / Last updated on: 1987-01-01
Available languages: en