Primarily, the steam turbines spin the generators, which make electricity. That is the primary objective of a nuclear power plant, to make electricity.

There are other steam turbines in a nuclear power plant which are used for various functions, such as High Pressure Coolant Injection and Low Pressure Coolant Injection, which are used during various shutdown and emergency scenarios.

Steam injection molding is also referred to as RHCM. Rapid Heat Cycle Molding.

In general ABS material is used as the raw material.

The primary advantage of steam injection is that it eliminates weld-lines on molded parts. This allows companies to eliminate future processes such as painting from the production process.

In non steam molding, water will heat the tool to a constant temperature (say 60 degrees). Plastic will be injected to the warm tool.

In steam molding, steam is injected at 160 degrees to heat the tool. When the tool reaches a predetermined temperature (about 140 degrees) the plastic is injected. Cold water is immediately added to the process to cool the plastic down to around 40 degrees.

Because the mold is so hot when the plastic is injected, there are no weld lines & you should end up with a 'perfect' product. Steam injection molding is now being extensively used to produce the front covers of LCD TVs.

expansion

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Agree. Water injected into the cylinders flashes to steam due to the heat of combustion. Watere expands about 1700 times when it changes from liquid to steam- this gives more "push" on the pistons.

This is a flywheel. It keeps the momentum going, after the initial injection of steam, so that the next valve can open and start the cycle again.

later developments did away with the flywheel, by improving the valve system and having multiple cyclinders.