Development of a 20-ton-capacity Load-cell-based Weighing System for IAEA Field Use

Based on results of an International Atomic Energy Agency (IAEA) fi'eld test of the prototype 20-ton-capacity Load-Cell-Based Weighing System (LCBWS), a modified LCBWS is being configured for routine IAEA field use in verifying the masses of 10- and 14-ton UFe cylinders. The modified system is being designed to meet IAEA objectives for accuracy and portability as well as to meet facility operating safety conditions. To best meet these design requirements, a comprehensive survey of commercially available weighing equipment was conducted. Detailed equipment specifications for 25 load cells from 15 manufacturers, for 5 digital crane scales from 3 manufacturers, and for 7 digital weight indicators from 5 manufacturers were compared. The recommended system configuration is a custom-designed load cell in conjunction with a production digital weight indicator. Safety certification of the system by an internationally recognized verification authority is also recommended. Comparison criteria and their effect on the LCBWS design requirements are discussed, and the status of the project is reported.