We have evaluated the performance of the CDF plug tile/fiber
calorimeter under the radiation environment at a luminosity of 1 x 10^33 cm^-2
s^-1 at TeV33.  The issues covered are the radiation damage, the anode current
of photomultipliers, and the energy miss-measurement due to the minimum bias
event pile-ups.  The plug calorimeter is expected to perform as precision
calorimetry in the pseudorapidity range up to $\approx 2.3.