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IAEA0905 PRESTO.

PRESTO, Slab Shields for Time-Dependent Gamma Spectra

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1. NAME OR DESIGNATION OF PROGRAM:  PRESTO is a simple code for gamma
ray shielding design-studies.  The final  design of real shielding
should be taken from more complex codes.
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2. COMPUTERS
To submit a request, click below on the link of the version you wish to order. Only liaison officers are authorised to submit online requests. Rules for requesters are available here.
Program name Package id Status Status date
PRESTO IAEA0905/01 Tested 09-MAY-1989

Machines used:

Package ID Orig. computer Test computer
IAEA0905/01 BESM-6 DEC VAX 8810
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3. DESCRIPTION OF PROGRAM OR FUNCTION

PRESTO is designed to calculate slab shields for gamma ray sources of complex and time dependent energy spectra.
PRESTO I treats cylinder sources with shields at side, such as pipelines or containers in radioactive facilities.
PRESTO II is the analogous code for spherical sources.
The programs permit to consider volume sources or a combination of volume and surface sources. To describe the source spectrum, one can start from the nuclides contained in the source mixture or (with the aid of PRESTO IA) from energy group sets.
The internal data set contains 5 common shield construction materials.
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4. METHOD OF SOLUTION

The solution method is based on the point kernel integration, extended by the "self absorption distance" concept.
The approximation mentioned before reduces the spatial flux calculation to a plane problem.
The dose build-up factor is taken into account by Taylor's equation. Some functions necessary for the integration will be calculated inside the program, by means of extrapolation based on the internal  data sets.
PRESTO permits to calculate:
1). required shield thicknesses for a given dose rate level or the  allowed activity concentration of the source for a given shield     thickness, both time dependent.
2). the contribution to the dose rate by single nuclides.
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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

- Energy range from 0.1 to 10 MeV.
- Contents of internal nuclide library:
100 nuclides with 428 energy lines. One job run can use 30 of them    (up to 280 energy lines)
- PRESTO I : 1 shielding material per job
- PRESTO II: up to 5 shielding materials per job
- PRESTO IA: 40 energy groups, taken from the nuclides contained in               the data set, or up to 250 free energy groups.
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6. TYPICAL RUNNING TIME

- PRESTO I  about 1 min.
- PRESTO II about 1.5 min.
- Using PRESTO IA not significantly longer.
IAEA0905/01
NEA-DB ran the different modules of the test case included in this package on a VAX 8810 computer in less than 6 seconds of CPU time.
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7. UNUSUAL FEATURES OF THE PROGRAM

PRESTO is written especially for simple shielding design studies. The chosen approximation is due to  calculations of shieldings for piping and spherical/cylindrical containers. Surface sources built up by radioactive deposits can be  estimated.
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8. RELATED AND AUXILIARY PROGRAMS

There are no programs related with  the PRESTO code. It is possible to get input data for energy group calculation with PRESTO IA from other codes.
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9. STATUS
Package ID Status date Status
IAEA0905/01 09-MAY-1989 Tested at NEADB
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10. REFERENCES

- Jaeger R.G. et Al.,
  Engineering Compendium on Radiation Shielding, Volume 1,
  Springer Verlag Berlin (1968).
- Weidemann W. et Al.,
  Kernenergie (21), 4 (1978).
- Buscaglione S. et Al.,
  Build-up Factors: Coefficients of the Equation of J.J. Tyalor
  Report ORNL-TR-80 (Rev.) RT/FI (65) 7/, 1965, m. in /1/.
- Gusev N.G. , P.P. Dmitriev,
  Kvantovoje Izlucenije Radioaktivnych Nuklidov,
  Sprarocnik, Moskva Atomizdat 1977.
IAEA0905/01, included references:
- W. Weidemann, U.E. Michaelis and G. Siewczynski:
  PRESTO - A Program System for Shielding Calculations of
  Cylindrical and Spherical Gamma Sources.
  (1984) (In German)
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11. MACHINE REQUIREMENTS

- high speed memory: PRESTO I/II/Ia 20 to 30 K-words
- auxiliary drum storage: PRESTO I    50 000 words
                          PRESTO II   90 000 words
                          PRESTO IA   60 000 Words
- data input: from card reader or tape
- output: printer, plotter (PRESTO II)
IAEA0905/01
The test case runs on a VAX 8819 computer in 5054K bytes (9872 pages) of main storage.
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12. PROGRAMMING LANGUAGE(S) USED
Package ID Computer language
IAEA0905/01 FORTRAN
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13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED

BAMOS - Version 02.01.1984
- library routines/functions
  RREAD/RWRITE: transfer to/from external
  VIEL        : Curve print routine
IAEA0905/01
VMS V5.0-1 (VAX 8810).
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14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS:
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15. NAME AND ESTABLISHMENT OF AUTHORS

         W. Weidemann, U.E. Michaelis, G. Siewczynski
         VEB Kombinat Kraftwerksanlagenbau
         Berlin, GDR
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16. MATERIAL AVAILABLE
IAEA0905/01
File name File description Records
IAEA0905_01.001 Information file 99
IAEA0905_01.002 Source of PRESTO1 1134
IAEA0905_01.003 Source of PRESTO1A 593
IAEA0905_01.004 Source of PRESTO2 1867
IAEA0905_01.005 Input data of PRESTO1 8
IAEA0905_01.006 Input data of PRESTO1A 30
IAEA0905_01.007 Input data of PRESTO2 22
IAEA0905_01.008 Output of PRESTO1 1494
IAEA0905_01.009 Output of PRESTO1A 1112
IAEA0905_01.010 Output of PRESTO2 826
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17. CATEGORIES
  • J. Gamma Heating and Shield Design

Keywords: gamma radiation, gamma spectra, shielding, shields, time-dependent.