原子能科学技术
原子能科學技術
원자능과학기술
ATOMIC ENERGY SCIENCE AND TECHNOLOGY
2009年
12期
1100-1105
,共6页
LBB%蠕变温度%疲劳蠕变%核级管道
LBB%蠕變溫度%疲勞蠕變%覈級管道
LBB%연변온도%피로연변%핵급관도
LBB%creep temperature%fatigue-creep%nuclear pipes
LBB(Leak-Before-Break)技术是保证核反应堆结构安全和可靠的一种重要分析方法.对于在蠕变温度以上高温堆(如快堆)的核级管道,运用LBB分析时应考虑疲劳和蠕变对裂纹扩展的影响.本工作以法国规范RCC-MR的A16为基础、以快堆余热排放系统的一段管道为研究对象进行LBB分析,总结出一套运用于蠕变温度以上核级管道安全分析的LBB方法.经计算得到,在蠕变温度以上,蠕变对裂纹扩展的影响较大.经验证,该管道符合LBB技术对于裂纹稳定性及泄漏量可探测性的条件,满足从开始泄漏到裂纹失稳的时间要求.
LBB(Leak-Before-Break)技術是保證覈反應堆結構安全和可靠的一種重要分析方法.對于在蠕變溫度以上高溫堆(如快堆)的覈級管道,運用LBB分析時應攷慮疲勞和蠕變對裂紋擴展的影響.本工作以法國規範RCC-MR的A16為基礎、以快堆餘熱排放繫統的一段管道為研究對象進行LBB分析,總結齣一套運用于蠕變溫度以上覈級管道安全分析的LBB方法.經計算得到,在蠕變溫度以上,蠕變對裂紋擴展的影響較大.經驗證,該管道符閤LBB技術對于裂紋穩定性及洩漏量可探測性的條件,滿足從開始洩漏到裂紋失穩的時間要求.
LBB(Leak-Before-Break)기술시보증핵반응퇴결구안전화가고적일충중요분석방법.대우재연변온도이상고온퇴(여쾌퇴)적핵급관도,운용LBB분석시응고필피로화연변대렬문확전적영향.본공작이법국규범RCC-MR적A16위기출、이쾌퇴여열배방계통적일단관도위연구대상진행LBB분석,총결출일투운용우연변온도이상핵급관도안전분석적LBB방법.경계산득도,재연변온도이상,연변대렬문확전적영향교대.경험증,해관도부합LBB기술대우렬문은정성급설루량가탐측성적조건,만족종개시설루도렬문실은적시간요구.
LBB (Leak-Before-Break) is an important analysis method for insuring the structure safety and reliability of nuclear reactor. It must consider the affection of fatigue and creep to the crack growth for the nuclear pipes in the high temperature reac-tors (as fast reactor) beyond the creep temperature. The paper summarizes a set of LBB method applying for the safe analysis of the nuclear pipes beyond the creep temperature,basing on A16 in the France RCC-MR standard and carrying on LBB analysis for a section of pipe in the heat drainage system in fast reactor. By calculation, creep affects the crack growth greatly beyond the creep temperature. It is demonstrated that the pipe meets the conditions that the crack is stable and the leakage is detectible which LBB asks for, and it also satisfies the time request from the beginning of leak to the moment at which the crack is unstable.
