Steam Generator Research Paper

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Steam generator has to operate for the whole designed life of the nuclear power plant and any crack or degradation can cause severe issues in the operation. It is responsible for the removal of heat from the core. It acts as a separation between the radioactive primary coolant and non-radioactive secondary coolant. The Steam generator tubes are made off of Ni-Cr-Fe based alloys such as alloy-690 are used in the nuclear power plants in the form of thin walled tubes which are exposed to aggressive environments such as high temperature, internal pressure and flow induced vibration etc. Various forms of steam generator tube degradation have resulted in the plugging of more than 100 000 tubes to date around the world One hundred and five steam…show more content…
They are used in pressurized water reactors (PWR) between the primary and secondary coolant loops. Boiling water reactors (BWR) do not use steam generators, as steam is produced in the pressure vessel. In commercial power plants, there are 2 to 4 steam generators per reactor; each steam generator can measure up to 70 feet (~21m) in height and weigh as much as 800 tons. Each steam generator can contain anywhere from 3,000 to 16,000 tubes, each about three-quarters of an inch (~19mm) in diameter. The coolant (treated water), which is maintained at high pressure to prevent boiling, is pumped through the nuclear reactor core. Heat transfer takes place between the reactor core and the circulating water and the coolant is then pumped through the primary tube side of the steam generator by coolant pumps before returning to the reactor…show more content…
Build the model.
2. Apply loads and obtain the solution.
3. Review the results.

THEORY BACKGROUND

Stress
Stress is a physical quantity that expresses the internal forces that neighboring particles of a continuous material exert on each other. Simply stress is the force per unit area. There are many types of stresses.
Normal stress (axial stress) results when a member is subject to an axial load applied through the centric of the cross section. It can be defined in terms of forces applied to a uniform rod; numerically it is the ratio of the perpendicular force applied to a specimen divided by its original cross sectional area. Shear stress is defined in terms of a couple that tends to deform a joining member. It is used in cases where purely sheer force is applied to a specimen.

Strain
Strain gave us the deformations due to these stresses.
Normal strain is defined as the ratio of change in length due to deformation to the original length of the specimen.
Shear strain is defined as the tangent of the angle theta, and, in essence, determines to what extent the plane was

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