Reactor coolant pass

Figure 4. The co-current, counter-current, and mixed-flow tubeside temperature profiles for tube 1 in a four-coolant pass reactor...

In compliance with the closed fuel cycle concept accepted in Russia, SNF imloaded from Nuclear Submarines (NSs) with water-cooled reactors (WER) as well as SNF of nuclear icebreakers are forwarded to PA Mayak for reprocessing, fuel of liquid-metal coolant reactors, zirconimn-cladding fuel and damaged Spent Fuel... 

Transformation of make-up and recycle methacrolein, previously vaporized, to which air and steam are added, and then raised to the required temperature. The operation takes place in a multi-tube reactor with shell-side coolant circulation and the production of low-pressure steam. It.operates at about 300°C and 03.10 Pa absolute. The catalyst contained in the tubes must be regenerated periodically by controlled combustion of coke deposits. 

This process uses a multi-tube reactor containing a supported platinum-based catalyst Heat is removed by a coolant which vaporizes the benzene feed, previously dehydrated by azeotropic distillation, and also produces steam at 1.10 Pa absolute. 

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