Inside each generator are approximately $10,000$ pipes through which the radioactive water flows. I don't know all the exact specifications, but we will assume some reasonable numbers to allow us to calculate the performance.

Assume the water from the reactor core enters the steam generator at $317$ C $($it is inside the tube$)$ and that the steam generator is operating at $277$ C $($this is the pipe wall temperature for the entering radioactive water$).$ That is$,$ water at $317$ C enters a pipe whose wall is constant at $277$ C $.$ The water flows at $\backslash (1\backslash$mathrm$\{$~kg$\}/\backslash$mathrm$\{$s$\}\backslash )$ in each tube, and the tube is $5$ cm in diameter and $20$ m long. The tube is made of commercial steel $($not really, but for our calculations it is$).$

Use properties of saturated water at the film temperature for this problem. The water is actually under higher pressure, but our book does not have properties at pressures other than saturation.

a$)$ What is the minimum pressure of the radioactive water to keep it from boiling $($hint: this is a thermodynamics question, not a heat transfer question. It's a review!$)$

b$)$ What is the distance before the flow is fully developed in the pipe?

c$)$ What is the temperature of the radioactive water leaving the steam generator $($at $\backslash (\backslash$mathrm$\{$x$\}=20\backslash )$ m $)?$

d$)$ How much heat is transferred from one tube in the steam generator to the surrounding water $($the water outside the pipe$)?$ Note: this water is boiling.