Preliminary skyshine calculations for the Poloidal Diverter Tokamak Experiment
Abstract
A calculational model is presented to estimate the radiation dose, due to the skyshine effect, in the control room and at the site boundary of the Poloidal Diverter Experiment (PDX) facility at Princeton University which requires substantial radiation shielding. The required composition and thickness of a waterfilled roof shield that would reduce this effect to an acceptable level is computed, using an efficient onedimensional model with an Sn calculation in slab geometry. The actual neutron skyshine dose is computed using a Monte Carlo model with the neutron source at the roof surface obtained from the slab Sn calculation, and the capture gamma dose is computed using a simple pointkernel singlescatter method. It is maintained that the slab model provides the exact probability of leakage out the top surface of the roof and that it is nearly as accurate as and much less costly than multidimensional techniques.
 Publication:

Nuclear Technology Fusion
 Pub Date:
 January 1981
 Bibcode:
 1981NucTF...1...90N
 Keywords:

 Controlled Fusion;
 Diverters;
 Neutron Emission;
 Radiation Shielding;
 Tokamak Devices;
 Approximation;
 Energy Technology;
 Impurities;
 Leakage;
 Monte Carlo Method;
 Radiation Hazards;
 Engineering (General)