$17\mathrm{.}3$ If the power density of a uranium oxide fuel pin, of radius $0\mathrm{.}6cm,$ is $500\frac{W}{c}{m}^3,$ what is the heat flux across the fuel rod surface? If the temperatures of rod surface and coolant are $300C$ and $250C,$ respectively, what must the heat transfer coefficient $h$ be$?$

$17\mathrm{.}4$ A PWR operates at thermal power of $2500MW,$ with water coolant mass flow rate of $15,000k\frac{g}{s}.($a$)$ If the coolant inlet temperature is $275C,$ what is the outlet temperature? $($b$)$ If bulk boiling occurs at $336C,$ at what reactor power would this take place? $c_p=6\mathrm{.}06{10}^3\frac{J}{kg*C}$ for PWR conditions $($see page $310,$ example $17\mathrm{.}3)$

$17\mathrm{.}6$ The thermal efficiencies of a PWR converter reactor and a fast breeder reactor are $0\mathrm{.}33$ and $0\mathrm{.}40,$ respectively. $($a$)$ What are the amounts of waste heat for a $900$MWe reactor? $($b$)$ What percentage reduction in waste heat is achieved by going to the breeder?

$17\mathrm{.}7$ As shown here, water is drawn from a cooling pond and returned at a temperature $14C$ higher to extract $1500MW$ of waste heat. All the heat is dissipated by water evaporation from the pond with an absorption of $2258\frac{J}{g}.($a$)$ How many kilograms per second of makeup water must be supplied from an adjacent river? $($b$)$ What percentage is this of the circulating flow to the condenser?

$17\mathrm{.}14$ Calculate the volumetric heat generation rate in a thermal reactor fueled with naturally enriched $U{O}_2$ of density $10\frac{g}{c}{m}^3$ and which is exposed to a flux of ${10}^{14}\frac{n}{c{m}^2*s}.$