Inventory Verification Measurements Using Neutron Multiplicity Counting*

Year
1998
Author(s)
D.G. Langner - Los Alamos National Laboratory
N. Ensslin - Los Alamos National Laboratory
William C. Harker - Los Alamos National Laboratory
M. S. Krick - Los Alamos National Laboratory
L. A. Foster - Los Alamos National Laboratory
Abstract
This paper describes a series of neutron multiplicity measurements of large plutonium samples at the Los Alamos Plutonium Facility. The measurements were corrected for bias caused by neutron energy spectrum shifts and nonuniform multiplication, and are compared with calorimetry/isotopics. The results show that multiplicity counting can increase measurement throughput and yield good verification results for some inventory categories. We provide recommendations on the future application of the technique to inventory verification.