CAJ | 학술논문

基于热疲劳的核辅助管道Farley-Tihange现象频繁出现在运行核电厂的余排热交换器下游冷、热水混合区,以及与主冷却剂管道直接相连的安全注入系统和余热排出系统管道焊缝或母材上,轻则引发超标缺陷、重则导致小LOCA（冷却剂丧失事故）。本文概括了Farley-Tihange现象典型位置和潜在风险,建立了失效原因故障树,分析了Farley-Tihange现象的热疲劳失效机理与模式,提出了包括运行监督、停堆无损监测和应急维修预案等在内的系统化应对策略。
기우열피로적핵보조관도Farley-Tihange현상빈번출현재운행핵전엄적여배열교환기하유랭、열수혼합구,이급여주냉각제관도직접상련적안전주입계통화여열배출계통관도한봉혹모재상,경칙인발초표결함、중칙도치소LOCA（냉각제상실사고）。본문개괄료Farley-Tihange현상전형위치화잠재풍험,건립료실효원인고장수,분석료Farley-Tihange현상적열피로실효궤리여모식,제출료포괄운행감독、정퇴무손감측화응급유수예안등재내적계통화응대책략。
Due to thermal fatigue,Farley-Tihange phenomenon frequently appears on the downstream area filled with cold and heat water of the residual heat removal heat-exchange equipment and the base metal and welding joint of the RIS and RRA pipes connected with the main coolant pipe directly in nuclear power plants in operation worldwide,which brings unacceptable defects,even worse induces LOCA.This article summarizes the recurrent position and potential risks of the Farley-Tihange phenomenon,establishes the fault tree of its failure causes,analyses failure mechanism and models of heat fatigue,presents systematically countermeasures including in-operation supervision,shutdown non-destructive monitoring,emergency maintenance preparedness and so on.