At V. C. Summer if it were ever necessary to perform a manual calorimetric our procedure states that feedwater enthalpy is to be based on the enthalpy of saturated liquid from the saturated steam temperature table using feedwater temperature instrumentation.

William H. Bell, PE

Chemical Engineer

Reactor Engineering

V. C. Summer Station

South Carolina Electric & Gas Co.

803-345-4389

From: pwrrm@retaqs.com [mailto:pwrrm@retaqs.com] On Behalf Of Kenneth R Pike
Sent: Friday, October 15, 2010 9:10 AM
To: pwrrm@retaqs.com
Subject: [Pwrrm] Manual calorimetric Feedwater Enthalpy determination

What method do you use to assign an Enthalpy to Feedwater, given FW Temperature and S/G pressure when using your backup Manual calculation?

Do you use compressed liquid steam tables at a single pressure and iterate on the temperature to assign a value, or iterate on both temp and pressure.

If you use a single value of pressure, is it nominal full power S/G press or something different?

Ken Pike
(610) 277-8991 Ext.253