As an alternative to storing radioactive materials in oceanic waters, it is proposed that the system of Problem 3.62 be placed in a large tank for which the flow of water, and hence the convection coefficient h, can be controlled. Compute and plot the maximum temperature of the lead, T(r₁), as a function of h for 100 < h < 1000 W/m² ∙ K.1f the temperature of the lead is not to exceed 500 K, what is the minimum allowable value of h? To improve system reliability, it is desirable to increase the thickness of the stainless steel shell. For h = 300,500, and 1000 W/m² ∙ K, compute and plot the maximum lead temperature as a function of shell thickness for r₃ 0.30 m. What are the corresponding values of the maximum allowable thickness?