PSR-0284 NUFACE.

1. NAME OR DESIGNATION OF PROGRAM:  NUFACE.

3. DESCRIPTION OF PROGRAM OR FUNCTION

NUFACE calculates nuclear responses, such as first wall and toroidal field coil irradiation damage limits, the tritium breeding ratio, the helium and hydrogen production rates, and the fast neutron fluence for a given tokamak fusion reactor.

4. METHOD OF SOLUTION

NUFACE computes nuclear response rates using the scalar and angular neutron fluxes computed by the ONEDANT code (CCC-0547) and the MACKLIB-IV response functions. The response function library is converted to binary form by CRESPLIB. The calculation of the zone-integrated response rates is performed by multiplying the neutron (gamma) flux at a given position, by the response function of interest and summing over all constituents and  fine-mesh cells within the zone. Zone-boundary responses are calculated by multiplying the zone-boundary flux by the response functions.

5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

NUFACE uses the fluxes as computed by ONEDANT (CCC-0547). The MACKLIB-IV response function data is in a 46 neutron, 21 gamma group structure.

6. TYPICAL RUNNING TIME

On a Cray XMP/14, the ONEDANT run to create the input fluxes to NUFACE took about 52 seconds. The creation of a
binary library with the code CRESPLIB took about three seconds. NUFACE took about one second of CPU time on the sample problem.

7. UNUSUAL FEATURES OF THE PROGRAM:

8. RELATED AND AUXILIARY PROGRAMS:

10. REFERENCES:

11. MACHINE REQUIREMENTS:  NUFACE runs on the Cray XMP.

13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED

The code was written in FORTRAN 77. It runs under both CTSS and UNICOS operating  systems. Under UNICOS, the CFT77 compiler is used.

14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS:

15. NAME AND ESTABLISHMENT OF AUTHORS

     Radiation Shielding Information Center
     Oak Ridge National Laboratory
     Oak Ridge
     Tennessee, U.S.A.