Prototype Patch

Nautilus 's reactor core prototype at the S1W facility in IdahoUnder the leadership of Admiral, Naval Reactors followed a concurrent design strategy, with the design and construction of the S1W reactor taking place ahead of the design and construction of the Nautilus. This enabled problems to be identified and resolved before they appeared in the shipboard plant. To better support this design process, the S1W power plant was built inside of a submarine hull. While the cramped spaces prevented engineers from obtaining information on some plant components, it provided a much more realistic example of how the shipboard plant would have to be constructed.Operation The S1W was a that utilized water as the and in its primary system, and in its. The S1W reactor reached on March 30, 1953. In May of that year, it began power operations, performing a 100-hour run that simulated a submerged voyage from the east coast of the to. This test run clearly demonstrated the revolutionary impact that nuclear propulsion would have upon the submarine, which prior to that time was greatly limited in its ability to conduct continuous underwater operations by life and by the requirement of.The heated, pressurized water of the S1W reactor power plant was circulated through heat exchangers in order to generate high pressure saturated steam in a separate water loop.

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This saturated steam powered steam turbines for propulsion and generation of electricity. These facilities were constructed inside an elevated hull simulating the engineering portion of the Nautilus hull. A single propeller was simulated through use of a. Large, exterior water were used to dissipate the heat energy created in the facility into the air.Following the of the USS Nautilus, the S1W plant was operated to support plant testing and training of operators. Trainees were graduates of the in Bainbridge, MD, Mare Island, CA or Orlando, FL (all locations now closed).

The course of study lasted six months and consisted of a combination of classroom and closely supervised practical training.In the mid-1960s, the S1W core was removed. An extension was bolted to the top of the reactor vessel so that a larger S5W reactor core could be installed. After that time the prototype was called S1W/S5W core 4. The new core was first taken in late summer of 1967. In order to use the additional power generated by the S5W reactor, additional facilities were added in order to dump the excess steam when the plant was operated at higher power levels.

These steam dumps were constructed in the same building, but outside the mock submarine hull.S1W was shut down permanently in 1989 (October 17). References.