NUREG/CR-5314, Vol. 3, "Life Assessment Procedures for Major LWR Components.Cast Stainless Steel Components."
نویسنده
چکیده
7bis report presents a procedure for estimating the current condition and residual life of -safety-related cast stainless steel components in light wa racos (LWRs). The procedure accounts for loss of fractur toughness caused by hrmal embrittlement and includes the folloing: a review ofdesign and fabrication records, nserice inspection recods, and operating history a fracture mechanics evaluation to determine the required tughness at end-of-life using worstMoads and woast-law indications; current and future toughness estimates: and criteria regarding continued service, repair, or replacement of the component being evaluated. The report discusses the available Charpy V-notch impact energy. fcture toughness, tensile strength, fatigue sistance. and ftge-crac k growth data, and presents two methods for assessing the degree of thermal embrittlement: metallurgical evaluation and analytical modeling of inservice degradation. FIN No. A6389--Components and systems Iv
منابع مشابه
NUREG/CR-6119 Vol 2 Rev 2 [3:3] "MELCOR Computer Code Manuals: Reference Manuals Version 1.8.5" S102520-03X
متن کامل
NUREG/CR-5378, "Aging Data Analysis and Risk Assessment Development and Demonstration Study."
This work develops and demonstrates a probabilistic risk assessment (PRA) approach to assess the effect of aging and degradation of active components on plant risk. The work (a) develops a way to identify and quantify age-dependent failure rates of active components, and to incorporate them into PRA; (b) demonstrates these tools by applying them to a fluid-mechanical system, using the key eleme...
متن کاملMicrostructural and microchemical mechanisms controlling intergranular stress corrosion cracking in light-water-reactor systems
This review paper examines mechanisms controlling IGSCC in selected LWR components. Emphasis is placed on identifying material microstructures and microchemistries which promote susceptibility to premature failure. Two important examples are evaluated in some detail: stainless steel pipe cracking and primary-side SCC of alloy 600 steam generator tubing. In each case, grain boundary segregation ...
متن کاملElectrochemical and Tribological Behaviour of Oxide Dispersion Strengthened Duplex Stainless Steel in Mine Water Environment
Abstract This work investigated the electrochemical and aqueous tribological behavior of hot pressed 2205 duplex stainless steel (DSS). DSS sintered composites of different volume percent (% vol) of partially stabilized zirconia (PSZ) was developed using powder metallurgy (PM) technique. Electrochemical behaviour was studied at room temperature, using open circuit potential and potentiody...
متن کاملRasool, Ghulam and Stack, Margaret (2014) Mapping the role of Cr content in dry sliding of steels : comparison between maps for material
In this work, a study of the wear transition regimes was carried out for a pin-on-disk sliding couple, involving two steels of different hardness and Cr contents. Dry sliding wear behaviour of the more highly alloyed stainless steel was dominated by adhesive wear and tribo-oxidation at relatively low sliding speeds and by mixed and adhesive wear at high speeds and loads. In contrast, oxidative ...
متن کامل