NEA-0926 MARIA-SYSTEM.

1. NAME OR DESIGNATION OF PROGRAM:  MARIA-SYSTEM.

3. DESCRIPTION OF PROBLEM OR FUNCTION

The MARIA System is a code package for PWR fuel assembly calculations. It generates the cross sections library for the diffusion calculations with burnup and feedback effects (CARMEN -SYSTEM NEA 0649), and the k(infinite) and M**2 parameters for the nodal calculations (SIMULA NEA 0768).

   The MARIA-SYSTEM includes three modules:

(1) PREWIM generates the input data for the fuel assembly calculation module, for all fuel assembly types in the core and at any condition of power rate and temperature.

(2) WIMS-TRACA is a modified version of the fuel assembly calculation program WIMS-D/4 (NEA 0329). It generates the collapsed  cross sections versus burnup needed by the CARMEN code: reference cell, boron, xenon, samarium, and light water.

(3) POSWIM calculates the transport corrections to the diffusion constant of the absorber materials generated by WIMS-TRACA, to be used directly in the diffusion code when rods or burnable absorber rods are present.

4. METHOD OF SOLUTION

PREWIM models the PWR assembly as a cluster of  rods, taking into account all the physical effects: Dancoff factor per fuel pin dependent on position, real fuel cells and absorber cells volume ratio, fuel pin spectrum in 69 groups independent of fuel assembly type, etc.
WIMS-TRACA performs the cluster calculation in two steps: first the theory of collision probabilites is used in 69 energy groups; then a Sn transport calculation is performed in few energy groups and with the detailed geometry. WIMS-TRACA provides the collapsed cross sections in two groups for every cluster region.
Special treatment is made in the condensation of the microscopic transport cross section for light water.
POSWIM corrects the diffusion constants for the absorber or control materials, fitting the leakages in the diffusion theory calculation to those of the transport calculation.

5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

PREWIM has some dimension restrictions, which may be changed. No particular restrictions are imposed on WIMS-TRACA and POSWIM.

6. TYPICAL RUNNING TIME

Significant running times must be foreseen for WIMS-TRACA: About 40 CPU seconds are required per burnup step with the number of regions and groups foreseen in the MARIA-SYSTEM,  on UNIVAC-1100/80.

NEA-DB executed the test case on CDC CYBER 740 in a total CPU time of 227 seconds.

NEA-DB executed the test case included in this package  on a VAX 6000-510 in 2m47s of CPU time.

7. UNUSUAL FEATURES OF THE PROGRAM

PREWIM reads external input data,  the other two modules read in an automatic way from the interface files generated by the previous module.

8. RELATED AND AUXILIARY PROGRAMS

CARMEN can use the library data generated by MARIA-SYSTEM.
SIMULA uses the parameters generated by MARIA-SYSTEM.

10. REFERENCES

- M.J. Halsall:
  A Summary of WIMS-D4 Input Options
  AEEW-M-1327 (1980).
- C. Ahnert, J.M. Aragones:
  CARMEN System, A Code Block for Neutronic PWR Calculation by
  Diffusion Theory with Space Dependent Feedback Effects
  JEN-515 (1982).
- J.M. Aragones, C. Ahnert, J.G. Santamaria, I.R. Olabarria:
  Developments and Validation of Core Physics Methods for In-Core
  Fuel Management of PWR's.
  Paper presented at the ANS Topical Meeting on Advances in Reactor
  Physics and Core Thermal-Hydraulics
  NUREG-CP-0034 (1982).

- C. Ahnert and J.M. Aragones:
  "MARIA System - A Code Block for PWR Fuel Assembly Calculations"
  J.E.N. 543 (1983).
- E Sartori:
  Circular Letter to All Recipients of the MARIA-SYSTEM
  Package NEA 0926/04
  NEADB Note NDB/88/0757  (May 17, 1988).
- C. Ahnert and J.M. Aragones:
  "MARIA System - A Code Block for PWR Fuel Assembly Calculations"
  J.E.N. 543 (1983).
- E Sartori:
  Circular Letter to All Recipients of the MARIA-SYSTEM
  Package NEA 0926/04
  NEADB Note NDB/88/0757  (May 17, 1988).

11. MACHINE REQUIREMENTS:

To run the test case included in this package on a CDC  CYBER 740 computer, 95K words of main storage are required, if the library is stored on the peripheral unit, and 187K words, if the library data are read from main storage.

13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED:
EXEC-8 (UNIVAC 1100); NOS (CDC CYBER 740).

VMS 5.4-2 (VAX 6000-510).

14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS:

15. NAME AND ESTABLISHMENT OF AUTHOR

This code system has been included in the Coordinated Research Programme (CRP) on  "Codes Adaptable  to Small and  Medium-Size
Computers Available in Developing Countries for In-Core Fuel
Management" of the International Atomic Energy Agency.

J.M. Aragones
Universidad Politecnica de Madrid
Castellana, 80
MADRID, Spain

C. Ahnert
Junta de Energia Nuclear
Avda. Complutense
MADRID, Spain.

File name	File description	Records
NEA0926_04.001	Information file	72
NEA0926_04.002	MARIA JCL file	432
NEA0926_04.003	PREWIM source (FORTRAN-4)	2343
NEA0926_04.004	PREWIM input data	94
NEA0926_04.005	PREWIM printed output	498
NEA0926_04.006	PREWIM output on TAPE 13	95
NEA0926_04.007	PREWIM output on TAPE 14	203
NEA0926_04.008	PREWIM output on TAPE 15	324
NEA0926_04.009	PREWIM output on TAPE 16	73
NEA0926_04.010	PREWIM output on TAPE 17	233
NEA0926_04.011	WRITER source program	112
NEA0926_04.012	WIMS DATA LIBRARY (FORMATTED)	29833
NEA0926_04.013	WIMS-D/4-MARIA source segment 1	939
NEA0926_04.014	WIMS-D/4-MARIA source segment 2	2254
NEA0926_04.015	WIMS-D/4-MARIA source segment 3	2470
NEA0926_04.016	WIMS-D/4-MARIA source segment 4	1012
NEA0926_04.017	WIMS-D/4-MARIA source segment 5	1086
NEA0926_04.018	WIMS-D/4-MARIA source sefment 6	1281
NEA0926_04.019	WIMS-D/4-MARIA source segment 7	1000
NEA0926_04.020	WIMS-D/4-MARIA source segment 8	2398
NEA0926_04.021	WIMS-D/4-MARIA source segment 9	1650
NEA0926_04.022	WIMS-D/4-MARIA source segment 10	1751
NEA0926_04.023	WIMS-D/4-MARIA source segment 11	711
NEA0926_04.024	WIMS-D/4-MARIA source segment 12	821
NEA0926_04.025	WIMS-D/4-MARIA source segment 13	3486
NEA0926_04.026	WIMS-D/4-MARIA source segment 14	1800
NEA0926_04.027	WIMS-D/4-MARIA source segment 15	1818
NEA0926_04.028	WIMS-D/4 MARIA source segment 16	1402
NEA0926_04.029	WIMS-D/4-MARIA source segment 17	999
NEA0926_04.030	WIMS-D/4-MARIA segmentation	30
NEA0926_04.031	WIMS-D/4-MARIA input data	101
NEA0926_04.032	WIMS-D/4-MARIA printed output	3406
NEA0926_04.033	WIMS-D/4-MARIA output on TAPE 8	42
NEA0926_04.034	WIMS-D/4-MARIA output on TAPE 14	280
NEA0926_04.035	WIMS-D/4-MARIA output on TAPE 19	48
NEA0926_04.036	POSWIM source	436
NEA0926_04.037	POSWIM input data	2
NEA0926_04.038	POSWIM printed output	58
NEA0926_04.039	POSWIM output on TAPE 22	48
NEA0926_04.040	WIMS-D/4 input data for case 1	142
NEA0926_04.041	WIMS-D/4 input data for case 2	24
NEA0926_04.042	WIMS-D/4 input data for case 3	69
NEA0926_04.043	WIMS-D/4 input data for case 4	92
NEA0926_04.044	WIMS-D/4 input data for case 5	26
NEA0926_04.045	WIMS-D/4 input data for case 6	47
NEA0926_04.046	WIMS-D/4 input data for case 7	33
NEA0926_04.047	WIMS-D/4 input data for case 8	38
NEA0926_04.048	WIMS-D/4 input data for case 9	96
NEA0926_04.049	WIMS-D/4 input data for case 10	17
NEA0926_04.050	WIMS-D/4 input data for case 11	85
NEA0926_04.051	WIMS-D/4 printed output of case 1	9355
NEA0926_04.052	WIMS-D/4 printed output of case 2	1723
NEA0926_04.053	WIMS-D/4 printed output of case 3	3155
NEA0926_04.054	WIMS-D/4 printed output of case 4	4573
NEA0926_04.055	WIMS-D/4 printed output of case 5	7751
NEA0926_04.056	WIMS-D/4 printed output of case 6	2654
NEA0926_04.057	WIMS-D/4 printed output of case 7	1232
NEA0926_04.058	WIMS-D/4 printed output of case 8	14334
NEA0926_04.059	WIMS-D/4 printed output of case 9	2461
NEA0926_04.060	WIMS-D/4 printed output of case 10	1954
NEA0926_04.061	WIMS-D/4 printed output of case 11	2197
NEA0926_04.062	Dayfile of this job on CDC CYBER	708

File name	File description	Records
NEA0926_06.001	Information file	109
NEA0926_06.002	Command file (compile link and run)	57
NEA0926_06.003	WRITER source file for WIMS-D/4 lib generat.	121
NEA0926_06.004	WRITER exe file	0
NEA0926_06.005	WIMS-D/4 library	0
NEA0926_06.006	Master Data Library	29833
NEA0926_06.007	Input sample case 1	141
NEA0926_06.008	Input sample case 2	23
NEA0926_06.009	Input sample case 3	68
NEA0926_06.010	Input sample case 4	91
NEA0926_06.011	Input sample case 5	24
NEA0926_06.012	Input sample case 6	46
NEA0926_06.013	Input sample case 7	32
NEA0926_06.014	Input sample case 8	37
NEA0926_06.015	Input sample case 9	95
NEA0926_06.016	Input sample case 10	16
NEA0926_06.017	Input sample case 11	84
NEA0926_06.018	SEG1 source file	1043
NEA0926_06.019	SEG2 source file	2267
NEA0926_06.020	SEG3 source file	2507
NEA0926_06.021	SEG4 source file	1020
NEA0926_06.022	SEG5 source file	1113
NEA0926_06.023	SEG6 source file	1288
NEA0926_06.024	SEG7 source file	1041
NEA0926_06.025	SEG8 source file	2403
NEA0926_06.026	SEG9 source file	1653
NEA0926_06.027	SEG10 source file	1751
NEA0926_06.028	SEG11 source file	716
NEA0926_06.029	SEG12 source file	827
NEA0926_06.030	SEG13 source file	3502
NEA0926_06.031	SEG14 source file	1827
NEA0926_06.032	SEG15 source file	1851
NEA0926_06.033	SEG16 source file	1404
NEA0926_06.034	SEG17 source file	999
NEA0926_06.035	Output sample case 1	9367
NEA0926_06.036	Output sample case 2	1383
NEA0926_06.037	Output sample case 3	3159
NEA0926_06.038	Output sample case 4	4580
NEA0926_06.039	Output sample case 5	7676
NEA0926_06.040	Output sample case 6	2658
NEA0926_06.041	Output sample case 7	1236
NEA0926_06.042	Output sample case 8	8330
NEA0926_06.043	Output sample case 9	2465
NEA0926_06.044	Output sample case 10	1958
NEA0926_06.045	Output sample case 11	2201
NEA0926_06.046	WIMSD4 exe file	0