CAJ | 학술논문

分析了静水压力对U O2高燃耗结构辐照肿胀产生影响的机理，据此给出了开发辐照肿胀本构关系的3个基本假设，得出静水压力主要通过压缩高燃耗结构气孔体积而影响辐照肿胀这一结论。在已完成开发的高燃耗结构辐照肿胀关系式的基础上，定量计算静水压力引起的气孔收缩和高燃耗结构辐照肿胀减小量，成功地开发了考虑静水压力的高燃耗结构辐照肿胀本构关系。利用现有高燃耗结构辐照肿胀数据对本构关系做了初步验证，验证结果表明了其合理性。
분석료정수압력대U O2고연모결구복조종창산생영향적궤리，거차급출료개발복조종창본구관계적3개기본가설，득출정수압력주요통과압축고연모결구기공체적이영향복조종창저일결론。재이완성개발적고연모결구복조종창관계식적기출상，정량계산정수압력인기적기공수축화고연모결구복조종창감소량，성공지개발료고필정수압력적고연모결구복조종창본구관계。이용현유고연모결구복조종창수거대본구관계주료초보험증，험증결과표명료기합이성。
The mechanism of hydrostatic pressure affecting the irradiation swelling of UO2 high burnup structure was analyzed .Three basic assumptions used to develop the constitutive equation of irradiation swelling were made accordingly .It is concluded that hydrostatic pressure imposes an important impact on irradiation swelling mainly through compressing the UO2 high burnup structure pores . Based on the already developed correlation of the irradiation swelling of UO 2 high burnup structure ,pore shrinkage due to the application of hydrostatic pressure and thus the reduction of irradiation swelling of UO2 high burnup structure were determined quantitatively , and the constitutive equation of irradiation swelling of UO2 high burnup structure considering the hydrostatic pressure was constructed successfully . The constitutive equation is validated using available irradiation swelling data of UO2 high burnup structure ,which demonstrates its reasonability .