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Sample text

1 [20E435E,4] ! 2 [8-22] AGING Table 3-7. Heat Exchanger Application MANAGEMENq" Summary GUIDELINE FOR PWR Heat Exchangers Design Parameter Ranges: Tube Side System and Ser_lce " ,,_o I Type Orientation HEAT EXCHANGERS (Continued) Design Parameter Ranges: Shell Side Pressure MPa Temp Flo_ kg/_c Pressure MPa [psig] _C [_F] [lbm/hrl [psig] °C [oF].. 9 [6-25] Notes: 1. 2. Includes various building closed Includes various system cooling system names, such as component cooling water, emergency equipment water.

Tables 3-9 and 3-10 list the manufacturers for these heat exchangers. This information was obtained from the NPRDS database and responses from several utilities. 1 Shell-and-Tube Heat Exchangers Chemical and Volume Control Regenerative Heat Exchanger- PWR Plants The regenerative heat exchanger reduces the temperature of reactor coolant entering the chemical and volume control system. It recovers the heat from the letdown stream by reheating the charging stream during normal operation. The letdown stream can flow through the shell of the regenerative heat exchanger and the charging stream through the tubes or vice versa, as both streams are reactor coolant (borated water).

Reactor water (primary water) is circulated through the tubes of the regenerative heat exchanger and the tubes of the non-regenerative heat exchanger prior to entering the cleanup demineralizers. Treated water is circulated through the shell of the non-regenerative heat exchanger for cooling. After leaving the demineralizers, the reactor water is circulated through the shell of the regenerative heat exchanger. The regenerative heat exchanger tubes and shell are austenitic stainless steel. The non-regenerative heat exchanger has austenitic stainless steel tubes and carbon steel shell.

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