Category Archives: Materials’ ageing and degradation in. light water reactors

Individual cable stressors: temperature, humidity, mechanical stress, and radiation

Elevated temperatures cause the polymers in the cable insulation to degrade through loss of elongation, embrittlement, and cracking (U. S. NRC, 2001). Cable polymers are primarily degraded by thermal oxidation in the pres­ence of oxygen, accelerating with increases in temperature as defined by the modified Arrhenius equation (IAEA, 2011):

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Y. H. JEONG and S. S. HWANG, Korea Atomic Energy Research Institute, Korea

DOI: 10.1533/9780857097453.3.315 Abstract: This chapter discusses management strategies in terms of mitigation and repair techniques for degradation in pressurized water reactors (PWRs). We begin by introducing PWR materials management strategies followed by details of ageing and life management of the PWR components. International cooperation activities for ageing management are also included. Development and application of mitigation techniques for reactor pressure […]

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