The inspections performed in Davis Besse and the South Texas Project Unit-I reactors pointed out safety issues regarding structural integrity of Pressure Vessel (PV). In these inspections, two anomalies were found: a wall thinning degradation PV upper head reactor small amount residue around instrument-tube penetration nozzles located lower plenum reactor. evolution defects could have resulted ...

Activation and safety analyses were performed for the ARIES-ST design. The ARIES-ST power plant includes a water-cooled copper centerpost. The first wall and shield are made of low activation ferritic steel and cooled with helium. The blanket is also made of ferritic steel with SiC inserts and Li17Pb83 breeder. The divertor plate is made of low activation ferritic steel and uses a tungsten brus...

The first lecture in this two-lecture sequence provides background and general concepts. The second lecture provides practical examples. The objective of these two lectures is to provide a modular design optimization tool description that will take into account interaction of the hot gas flow-field, heat transfer in the blade material, internal coolant flow-field, stresses and deformations of t...

Since the out-of-pile semi-integral tests performed at Studsvik in 2011 for NRC [1] and Halden Loss-Of-Coolant Accident (LOCA) test series IFA-650 [2], a major safety interest has raised Fuel Fragmentation, Relocation Dispersal (FFRD) during LOCA sequence. In addition to characteristics of fuel ejected from rod after clad failure, behaviour before failure is still be investigated, especially it...

The challenge for Automobile is present emission norms that demands engine for green environment with high performance and low emission. The Low Heat Rejection Engine (LHR Engine) is a technology, which minimizes heat loss to the coolant by providing heat resistance in the heat flow to the coolant. As LHR Engine is used, the heat is not transferred to the surroundings. Another method to improve...

The aim of this research work is to evaluate the effects of coolant including nano- powder material for the cooling purpose in milling process and comparing the results with the conventional coolant. Generation heat and weak heat transfer reduces the tool life and also deteriorate surface roughness during milling operation. To overcome this problem, it is necessary to use coolant for cooling as...

*Correspondence: Xiaojing Liu, School of Nuclear Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China e-mail: [email protected] During the loss of coolant accident (LOCA) of supercritical water-cooled reactor (SCWR), the pressure in the reactor system will undergo a rapid decrease from the supercritical pressure to the subcritical condition. T...

An important issue for the Fusion Reactors is hydrogen explosion hazard assessment. For this reason, in Work Package of Safety Analyses and Environment (WPSAE) EUROFusion consortium, a task was established to identify potential production DEMO vessel accident situations investigate possible solutions which can prevent risk dust explosion. The Vacuum Vessel (VV) lead combustion progressing defla...