Please use this identifier to cite or link to this item: http://113.161.190.196:8080/thuvienso/handle/123456789/2107
Title: Tiểu ban A: RSG GAS (MPR-30) RESEARCH REACTOR FUEL ELEMENT BURNUP MEASUREMENTS UNDER SUBCRITICAL CONDITIONS
Authors: Peng Hong Liem and Surian Pinem
Keywords: Burnup measurement, Equilibrium core, LEU silicide fuel, RSG GAS, Subcritical
Issue Date: 2017
Publisher: Viện Năng lượng nguyên tử Việt Nam
Abstract: Burnup measurements of in-house manufactured silicide fuel elements (FE) of RSG-GAS were conducted for the validation of the new fuel management strategy and response to the regulatory body concern on the safety limit of the FE. Amongst the 35 burnt FE we selected 22 fuel elements with high burnup classes i.e. from 20 to 53 % loss of U-235 (declared values) for the present measurements. The burnup measurement method was based on a linear relationship between reactivity and burnup where the measurements were conducted under subcritical conditions using two fission counters of the reactor startup channel. The measurement results were compared with the declared burnup evaluated by an in-house in-core fuel management code, BATAN-FUEL. A good agreement between the measured burnup values and the calculated ones was found within 8 % uncertainties. Possible major sources of differences were identified, i.e. large statistical errors (i.e. low fission counters’ count rates), variation of initial U-235 loading per FE and accuracy of control rod indicators. The measured burnup of the 22 FE provided the confirmation of the core burnup distribution planned for the equilibrium LEU silicide core under the new fuel management strategy.
URI: http://113.161.190.196:8080/thuvienso/handle/123456789/2107
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