岭澳核电站2号主变压器B相油中出现乙炔气体的原因分析

Cause Analysis of the Acetylene Produced in Main Transformer Phase B in LNPS

针对岭澳核电站2号主变压器B相油样色谱分析发现乙炔事件,将主变压器停运并进行了内部检查,在完成了必要的改进性维修后变压器恢复运行。运行后不久,该变压器油样中再次出现0.86μLˇL-1的乙炔,考虑到要保证变压器在一个循环周期内的安全运行,决定对该变压器进行更换处理。本文基于对变压器的吊罩检查和分析,提出了可能的肇事原因,并给出了应进一步采取的改进措施。

In the analysis of main transformer phase B of unit 2 in Ling’ao Nuclear Power Station(LNPS) by chromatography,acetylene was found.In order to carry out the inside check,the main transformer had been stopped and restored after necessary maintenances.But shortly,0.86 μL.L-1acetylene was measured,so the transformer had to be replaced for the safe operation in a new cycle.The paper analyzed the most possible causes based on the check results after lifting the tank of transformer,and the new corrective measurem...