Test of a large volume calorimeter in KEPRI tritium laboratory

A tritium assaying and dispensing system has been designed and is being constructed in KEPTL (Korea Electric Power Research Institute, Tritium Laboratory). This facility will be used to supply tritium from WTRF (Wolsong Tritium Removal Facility) to customers for industrial uses, R&D application, ITER operation and other purposes. In order to account the tritium amount loaded in and out this facility, KEPTL purchased a large volume calorimeter from Setaram. This calorimeter is integrated in a dedicated room of the KEPTL in 2008 and the site acceptance tests are completed. The KEPTL calorimeter is a twin cell type and its measuring range is from 0.01 gram of tritium to 60 gram of tritium. The tritium storage beds loaded into the measuring cell of the calorimeter reach a maximum size of 200 mm in diameter and 570 mm in height. The performance test has been successfully completed with a Joule effect cell simulating tritium decay heat. It is demonstrated that the precision of the calorimeter is measured to be less than 0.28% at 50 mW and 0.13% at 10 W. Relative error on real tritium test is measured to be 0.06% on 37 TBq of tritium.