Naval Reactors History Database (nrhdb)
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Naval Reactors (3)
S1G (3)
USS Seawolf (SSN-575) (2)
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Rickover, Hyman G. (1)
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1Title:  Containment structure built for the S1G prototype plant Add
 Summary:  The containment building built for the sodium-cooled, intermediate range S1G reactor plant in West Milton, New York. In January 1952, the Atomic Energy Commission's Reactor Safeguards Committee approved the construction of the S1G reactor at West Milton, provided the reactor was enclosed in a containment sphere. The 225 foot sphere, composed of one inch steel plates, was designed to contain any radioactivity release. After the sodium-cooled approach was abandoned by Naval Reactors, the S1G plant was decommissioned. The sphere was later used to house the D1G pressurized water reactor/prototype plant. 
 Reference:  Hewlett, Richard G., and Francis Duncan. Nuclear Navy, 1946-1962. Chicago: University of Chicago Press, 1974, pages 176-177. 
 Date:   unknown  
 Subject(s):  S1G | D1G | Naval Reactors 
 Type:  Image 
 Format:  JPEG 
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2Title:  The USS Seawolf sodium-cooled reactor Add
 Summary:  The text of a May 2012 speech by Eric Loewen of the American Nuclear Society, which focused on the sodium cooled intermediate range reactors designed and developed by General Electric for naval propulsion. While there are some errors in the text, Loewen describes sodium cooled reactor technology and components such as electromagnetic pumps. He provides some unique insights into the construction of the S1G and S2G naval plants. Similar to the Manhattan Engineer District project, the development of naval nuclear propulsion followed a parallel path with the Pressurized Water Reactor (PWR), developed by Westinghouse and the sodium cooled, Submarine Intermediate Rector (SIR), developed by General Electric. Loewen notes that the SIR offered two important advantages: "the sodium cooled knowledge base was further advanced than the PWR, and the sodium cooled reactor did have higher steam cycle efficiency" (3). He also describes some of the weaknesses of the SIR reactor, including the use of 347 stainless steel (347SS) in the superheaters and the "adverse affects of sodium" upon 347SS. Bypassing the superheaters led to higher-than-expected uranium depletion as the plant operated with lower steam temperatures and pressures (5). In reviewing the Soviet navy's use of liquid metal cooled plants, Loewen notes another weakness of the SIR: external heaters must keep the primary loop warm during reactor shutdown periods in order to keep the coolant from solidifying. Errors include the power rating of the Shippingport civilian power plant (initial rating, 60 MW) and the moderator for the S1G and S2G plants (which were beryllium, not carbon). 
 Date:  17 May 2012 
 Subject(s):  S1G | S2G | USS Seawolf (SSN-575) | Naval Reactors 
 Type:  Text 
 Format:  PDF 
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3Title:  Nuclear navy, 1946-1962 Add
 Summary:  The foundational history of the Naval Nuclear Propulsion Program, covering the period of the program's creation, under the leadership of Hyman G. Rickover, to 1962, by which time the United States Navy's fleet included nuclear-powered attack submarines, ballistic missile submarines, and surface ships. The program's leadership in support of the Shippingport Atomic Power Station is also chronicled. 
 Date:   1974 
 Subject(s):  Naval Reactors | Rickover, Hyman G. | S1W | USS Nautilus (SSN-571) | S1G | USS Seawolf (SSN-575) 
 Type:  Text 
 Format:  PDF 
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