IAEA1226 CORD-2.

1. NAME OR DESIGNATION OF PROGRAM:  CORD-2

3. DESCRIPTION OF PROGRAM OR FUNCTION

CORD-2 is intended for core design applications of pressurised water reactors. The main objective was to assemble a core design system which could be used for simple calculations (such as frequently required for fuel management) as well as for accurate calculations (for example, core  design after refuelling).

4. METHOD OF SOLUTION

The calculations are performed at the cell level with a lattice code in the supercell approximation to generate the single cell cross sections. Fuel assembly cross section homogenization is done in the diffusion approximation. Global core calculations can be done in the full three-dimensional cartesian geometry. Thermohydraulic feedbacks can be accounted for. The Effective Diffusion Homogenization method is used for generating the homogenized cross sections.

5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

The complexity of the problem is selected by the user, depending on the capacity of his computer.

6. TYPICAL RUNNING TIME

On Digital Alpha the approximate running time are as follows:
Test_1 : 1 second
Test_2 : 5 seconds
Test_3 : 5 minutes
Test_3a: 5 minutes
Test_4 : 15 seconds
Test_5 : 1 hour 30 minutes
Test_6 : 3 hours 35 minutes
Test_7 : 15 hours 10 minutes
Test_8 : 15 seconds
On 66 MHz PC-486 the complete test sequence takes approximately four days.

The test cases included in this package were executed at the NEA Data Bank on a DEC VAX-6000-510 computer. The following CPU times were required:

  Test 1  ->                       4 sec
  Test 2  ->                      14 sec
  Test 3  ->              20 min  06 sec
  Test 3a ->              40 min  51 sec
  Test 4  ->               1 min  59 sec
  Test 5  ->         4 h  29 min  52 sec
  Test 6  ->         7 h  01 min  38 sec
  Test 7  -> 1 day  21 h  44 min  02 sec
  Test 8  ->                      44 sec

7. UNUSUAL FEATURES OF THE PROGRAM

The package provides the calculational as well as data maintenance modules. Once the system is set up, it is relatively easy to use for design calculations of subsequent cycles of operation for a particular power plant.
Reflective quadrant core symmetry, cyclic quadrant symmetry and octant symmetry options are available.

8. RELATED AND AUXILIARY PROGRAMS

- WIMS-D/4 Lattice code,
- GNOMER   Neutron diffusion code

10. REFERENCES

- A. Trkov:
  GNOMER - Multigroup 3-Dimensional Neutron Diffusion Nodal Code
  with Thermohydraulic Feedbacks,
  Institute Jozef Stefan, Ljubljana, Slovenia,
  IJS-DP-6688 (March 1993)
- A. Trkov and M. Ravnik:
  CORD-2 Package for PWR Nuclear Core Design Calculations,
  Proceedings of the International Conference on Reactor Physics
  and Reactor Computations, Tel-Aviv (Jan. 23-26, 1994)
- A. Trkov and M. Ravnik:
  Effective diffusion Homogenization of Cross Sections for PWR Core
  Calculations, Nucl.Sci.Eng. Vol.116, No.2, pp.86-95 (Feb. 94)

- A. Trkov, N. Zeleznik:
  The Nuclear Core Design Manual, FASLIB - Fuel Assembly Library
  Management
  IJS-DP-6144 Rev. 2 (March 21, 1994)
- A. Trkov:
  The Nuclear Core Design Manual, Core Diffusion Cross Section
  Preparation
  IJS-DP-6173 Rev. 1 (March 21, 1994)
- M. Ravnik and al.:
  CORD-2 Core Design System for PWR Type Reactors
  IJS-DP-6174 Rev. 1 (July 28, 1994)
- A. Trkov:
  The Nuclear Core Design Manual, CORLIB Library Specifications
  IJS-DP-6175 Rev. 2 (March 21, 1994)
- A. Trkov:
  CORD-2 Package Users'Guide
  IJS-DP-6948 (August 3, 1994)

11. MACHINE REQUIREMENTS

IBM/PC with 640K main memory and about 30 MB  disk space, VAX/VMS or OpenVMS with about 40 000 blocks of disk space.

13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED:
On a PC: PC-DOS Ver.5; on VAX: VMS, OpenVMS

The test runs were performed at the NEA Data Bank on a  DEC VAX-6000-510 computer running under VMS V.6.1. The source codes  were compiled with the VAX FORTRAN compiler version 6.2-108.

14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS

To
execute a sequence of codes as necessary for a realistic calculation, the use of job control language is inevitable, but it has been kept to a minimum for better code portability. Appropriate  procedures are provided for VAX/VMS and PC/DOS systems. These may serve as examples to the user, to make adjustments for his specific  requirements or implementation on other operating systems.

15. NAME AND ESTABLISHMENT OF AUTHORS

Andrej Trkov
"Jozef Stefan" Institute
Reactor Physics Division
61111 Ljubljana, Jamova 39, PO. BOX 100
SLOVENIA

File name	File description	Records
IAEA1226_03.001	Information file	272
IAEA1226_03.002	Installation and test procedure	206
IAEA1226_03.003	Utility programs main Fortran source	17866
IAEA1226_03.004	Common routines Fortran source	4257
IAEA1226_03.005	Additional routines Fortran source	10517
IAEA1226_03.006	Additional PC-specific codes Fortran source	864
IAEA1226_03.007	Source code file maintenance (Fortran)	155
IAEA1226_03.008	Source code file maintenance (Fortran)	69
IAEA1226_03.009	Rename files from distribution media VAX/VMS	101
IAEA1226_03.010	Moves file to their target directories (VMS)	80
IAEA1226_03.011	Installation procedure for VAX/VMS	60
IAEA1226_03.012	Installation procedure for VAX/OpenVMS	63
IAEA1226_03.013	Installation procedure for PC	68
IAEA1226_03.014	Compiling and linking procedure for PC	5
IAEA1226_03.015	Utility module execution procedure for PC	19
IAEA1226_03.016	CORD-2 settings on PC	14
IAEA1226_03.017	Core cross section preparation procedure PC	51
IAEA1226_03.018	Cross section editing on PC-1 reg to 10 reg	21
IAEA1226_03.019	Cross section editing on PC-1 reg to 24 reg	21
IAEA1226_03.020	Aux.proc. for submitting jobs into a batch q	42
IAEA1226_03.021	Default settings for Almaraz-II calculations	5
IAEA1226_03.022	Not used	5
IAEA1226_03.023	CORD-2 settings on VAX (modiy for install)	15
IAEA1226_03.024	Auxiliary batch proc. for checking CPU time	19
IAEA1226_03.025	Procedure for clearing unnecessary files	6
IAEA1226_03.026	Copy FASlib files to the Master lib. direc.	21
IAEA1226_03.027	Sample procedure for FASlib files editing	86
IAEA1226_03.028	Core cross section preparation proc. for VAX	230
IAEA1226_03.029	Reflector cross section prepa. proc. for VAX	37
IAEA1226_03.030	Run WIMS-D/4 with local WD4IJS1 library	21
IAEA1226_03.031	Execute WIMS runs for all inputs from WICORD	130
IAEA1226_03.032	SAMPLE Finish procedure for burnup calculat.	71
IAEA1226_03.033	not used	22
IAEA1226_03.034	Sample procedure for generating ISOLIB libr.	206
IAEA1226_03.035	Cross section edit on VAX - 1 reg to 10 reg	20
IAEA1226_03.036	Cross section edit on VAX - 1 reg to 24 reg	20
IAEA1226_03.037	Cross section edit on VAX -10 reg to 24 reg	38
IAEA1226_03.038	not used	99
IAEA1226_03.039	not used	5
IAEA1226_03.040	Procedure to execute all test cases on VAX	158
IAEA1226_03.041	Procedure to execute all test cases on PC	124
IAEA1226_03.042	WIMLIB library summary file	320
IAEA1226_03.043	DIMLIB library file for Almaraz-II	164
IAEA1226_03.044	FASLIB merged library file	943
IAEA1226_03.045	GNOMER input for reactivity coef. calc.	156
IAEA1226_03.046	GNOMER input for control rod worth calcula.	1034
IAEA1226_03.047	GNOMER input for Almaraz core octant at HZP	69
IAEA1226_03.048	GNOMER input for Almaraz core octant at HFP	79
IAEA1226_03.049	GNOMER input for Almaraz core quadrant HZP	67
IAEA1226_03.050	GNOMER input for Almaraz core quadrant HFP	75
IAEA1226_03.051	Proc. for generating the ISOLIB library VAX	216
IAEA1226_03.052	Proc. for generating the ISOLIB library PC	72
IAEA1226_03.053	Generic reactivity coefficient library	45
IAEA1226_03.054	Measured power distribution	10
IAEA1226_03.055	CORlib file with burnup to EOC (measured)	343
IAEA1226_03.056	Loading pattern CORlib for Almaraz II cycle1	63
IAEA1226_03.057	Design CORlib file at BOC	220
IAEA1226_03.058	Design CORlib file with burnup to EOC	4583
IAEA1226_03.059	Procedure to generate the design CORlib(VAX)	14
IAEA1226_03.060	Procedure to generate the design CORlib (PC)	9
IAEA1226_03.061	Procedure for updating the FASlib files VAX	33
IAEA1226_03.062	Procedure for updating the FASlib files PC	31
IAEA1226_03.063	Procedure calculation reactivity coeff. VAX	46
IAEA1226_03.064	Procedure calculation reactivity coeff. PC	38
IAEA1226_03.065	Input file calculation reactivity coeff. VAX	41
IAEA1226_03.066	Input file calculation reactivity coeff. PCX	41
IAEA1226_03.067	Ref CORlib file on K-eff for reac coeff	111
IAEA1226_03.068	Main input for power distr calc at HZP (VAX)	150
IAEA1226_03.069	Main input for power distr calc at HZP (PC)	150
IAEA1226_03.070	Main input for control rod worth calc. (VAX)	9
IAEA1226_03.071	Main input for control rod worth calc. (PC)	9
IAEA1226_03.072	Proc for power distrib calculation HZP (VAX)	22
IAEA1226_03.073	Proc for power distrib calculation HZP (PC)	40
IAEA1226_03.074	Proc for control rod worth calculation (PC)	9
IAEA1226_03.075	Proc for control rod worth calculation (VAX)	12
IAEA1226_03.076	Sample output from power distribution calc.	75
IAEA1226_03.077	Sample CORlib output from power distr.calc.	58
IAEA1226_03.078	Sample CORlib output from CR worth calcul.	107
IAEA1226_03.079	Sample unrodded core cond. specif. file	260
IAEA1226_03.080	Sample unrodded core cross sections file	520
IAEA1226_03.081	Sample rodded core conditions specif file	90
IAEA1226_03.082	Sample rodded cross sections file	180
IAEA1226_03.083	Sample reflector conditions specific. file	3
IAEA1226_03.084	Sample reflector cross sections file	6
IAEA1226_03.085	Main input for power distrib calc HFP (VAX)	39
IAEA1226_03.086	Main input for power distrib calc HFP (PC)	40
IAEA1226_03.087	Proc for power ditribution calc. HFP (VAX)	10
IAEA1226_03.088	Proc for power ditribution calc. HFP (PC)	12
IAEA1226_03.089	Sample output power distribution calculation	62
IAEA1226_03.090	Sample CORlib output power distrib. calc.	1
IAEA1226_03.091	Proc for power distrib calc during burnupVAX	37
IAEA1226_03.092	Proc for power distrib calc during burnup PC	30
IAEA1226_03.093	Input for power distr calc during burnup VAX	41
IAEA1226_03.094	Input for power distr calc during burnup PC	41
IAEA1226_03.095	DOS file-names	94