Cooling water, high-temperature

The Hanford N Reactor. The Hanford N reactor was built in 1964 for purposes of plutonium production during the Cold War. It used graphite as moderator, pierced by over 1000 Zircaloy 2 tubes. These pressure tubes contained slightly enriched uranium fuel cooled by high temperature light water. The reactor also provided 800 MWe to the Washington PubHc Power Supply System. This reactor was shut down in 1992 because of age and concern for safety. The similarity to the Chemobyl-type reactors played a role in the decision. 

Factors Affecting Capacity Ejec tor (steam-jet) units become attractive when cooling relatively high-temperature chilled water with a source of about 7 bar gauge waste steam and relatively cool condensing water. The fac tors involved with steam-jet capacity include the following ... 

Engine cooling water High outlet temperature Engine lubricating oil system Low inlet pressure Fuel system ... 

The key equipment for testing is the water-cooled IR high-temperature cell (see Figure 5.31 [88,90]). In these cells, demountable parts are normally fitted with Viton O-rings to minimize leaking. The temperature of the sample holder is controlled electronically with very low variation, normally AT < 1°C [88-92],... 

Gas-cooled reactor Advanced gas-cooled reactor High- temperature gas-cooled reactor Heavy- water reactor Heavy-water organic-cooled reactor... 

Mechanical stability under operating fuel cell conditions (heating-cooling cycles, high temperature, humidity, and temperature/water gradients) is ne-... 

Of the twenty-six concepts and designs addressed, 13 (50%) are water cooled SMRs, 6 (23%) are gas cooled SMRs-high temperature gas cooled reactors (HTGRs), 6 are sodium or lead-bismuth cooled fast reactors, and 1 is a non-conventional very high temperature reactor concept, a liquid salt cooled reactor with HTGR type prismatic fuel. 

High cooling water return temperature. Above 130°F is considered excessive. 

High cooling water exit temperature override on condensate temperature control... 

The reaction is exothermic, reaching MOO C, and must be carried out in a refractory-lined or water-cooled vessel. High temperatures favor the formation of carbon monoxide and hydrogen, Pressure hinders the reaction, but pressures up to 1500 psi can be used and still produce a gas of low methane content. If steam is introduced into the reaction, the... 

Separation of low-molecular-weight materials. Low-molecular-weight materials are distilled at high pressure to increase their condensing temperature and to allow, if possible, the use of cooling water or air cooling in the column condenser. Very low... 

Direct water spray cooling must be carried out with care. The spray chamber must be designed to ensure complete evaporation of all Hquid droplets before the gas enters the baghouse. Spray impinging on the chamber walls can result ia a dust mud iaside the chamber and any increase ia gas dewpoint may result in baghouse problems or atmospheric plume condensation. Spray nozzle wear can result in coarse or distorted spray and wetted bags, and water pressure failure can cause high temperature bag deterioration. 

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