Nuclear steam supply system

Fig. 5.1-5 Nodal diagram of a nuclear steam. supply. system...

Plan view of nuclear steam supply system. 

A schematic drawing of the nuclear steam supply system is provided in Figure 2.7, and a drawing of a nuclear boiler is shown in Figure 2.8, with the various steam generation zones indicated. 

Fig. 8. Nuclear steam supply system foi contemporary pressui ized watei reactor. (Combu ttion Engineering)...

Electricity generation plants can be divided into seven generic types fossil fuel, nuclear, hydroelectric, cogeneration, geothermal, solar, and wind. The majority of electric power in the United States is generated by fossil and nuclear steam supply systems. 

The total cost of electricity sold in the United States in 1998 was 3.24 million gigawatt hours at a cost to consumers of 218.4 billion. The electricity generation plants use fossil fuel, nuclear, hydroelectric, cogeneration, geothermal, solar, and wind energies. The major players are fossil and nuclear steam supply systems. The two types of nuclear reactors are boiling water and pressurized water reactors. Some relevant data on the costs of corrosion estimated in 1998 are as follows nuclear facilities 1,546 billion fossil fuel sector 1,214 billion transmission and distribution 607 million hydraulic and other power 66 million. The total cost of corrosion in the electrical utilities industry in 1998 is estimated at 6,889 billion/year. 

The aspects which interest us here are those which, for the purpose of assessing the condition of the materials to justify prolonged operation, have yielded knowledge. We shall comment first and foremost on aspects concerning the nuclear steam supply system understood as the reactor block and the secondary circuits, including the steam generator. 

In spite of similarity of nuclear steam supply systems (NSSS) used for those icebreakers they were gradually step-by-step improved from one vessel to other. Their modifications were primarily directed to elimination of drawbacks revealed during operation of individual components and systems xmder harsh operating conditions in predecessor NSSSS, to enhancement of operational safety, technical economic characteristics and operating life. 

THE USE OF ENGINEERING FEATURES AND SCHEMATIC SOLUTIONS OF PROPULSION NUCLEAR STEAM SUPPLY SYSTEMS FOR FLOATING NUCLEAR POWER PLANT DESIGN... 

Nuclear Island Cooling Water Building Normal Operating Pressure Net Positive Suction Head Nuclear Steam Supply System Operating Basis Earthquake Outer Neutron Control Assemblies Outer Pyrocarbon Peak Accelerograph Protective Action Guidelines Private Automatic Exchange... 

Based on the specific Nuclear Steam Supply System (NSSS) design currently available, the parametric site screening study was performed with the CIASSI computer code to ascertain the site conditions which will produce the largest seismic responses In selected NSSS components. On the basis of this study, the following three representative sites shown in Figure 3.7-4 and described below were selected for further study with the SASSI computer code ... 

The nuclear steam supply system of the KNGR is designed to operate at rated output of 4000 MWth to produce an electric power output of around 1450 MWe. The major components of the primary circuit are the reactor vessel, two coolant loops, each containing one hot leg, two cold legs, one steam generator (SG), and two reactor coolant pumps (RCPs), and one pressurizer (PZR) connected to one of the hot legs. Two SGs and four RCPs are arranged symmetrically. 

For safety reasons, the reactor pressure vessel (RPV) is generally considered to be the most critical component in the nuclear plant aside from the reactor core. The RPV is also the one major component that may limit the useful life of the nuclear plant, because it is the heart of the nuclear steam supply system and, if it had to be replaced, an extraordinary amount of time and money would be required. Virtually every other component or system could be replaced cost-effectively, including the steam generators. 

Capsule designs vary by nuclear steam supply system (NSSS) vendor (e.g., Westinghouse, B W or C-E). However, all share the some common design considerations, which include ... 

It is essential to stress that the work of the project was concentrated on maximum admissible Pu content for the oxide fuel, degraded isotopic quality of the reference plutonium (recycled twice in a MOX/PWR, Table 0), high power core (1500 MWe), while seeking maximal compatibility with the main options of the EFR nuclear steam supply system and with technological experience regarding fuel. 

Integration of ttie Core into the Nuclear Steam Supply System... 

No major difficulty is to be anticipated in the integration of the reference oxide core into a nuclear steam supply system of EFR type. Certain minor geometrical adaptations are... 

The Nuclear Steam Supply System (NSSS) - Figure 46... 

The Nuclear Steam Supply System based on the standard Westlnghouse four-loop pressurised water reactor produces 3425 MW of heat. 

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