ESTS0071 PC-PRAISE.

1. NAME OR DESIGNATION OF PROGRAM:  PC-PRAISE.

3. DESCRIPTION OF PROGRAM OR FUNCTION

PC-PRAISE is a probabilistic fracture mechanics computer code developed for IBM or IBM compatible personal computers to estimate probabilities of leak and break in nuclear power plant cooling piping.

4. METHOD OF SOLUTION

PC-PRAISE considers the initiation and/or growth of crack-like defects in piping weldments. The initiation analyses are based on the results of laboratory studies and field observations in austenitic piping material operating under boiling water reactor conditions. The considerable scatter in such results is quantified and incorporated into a probabilistic model. The crack growth analysis is based on (deterministic) fracture mechanics principles, in which some of the inputs (such as initial crack size) are considered to be random variables. Monte Carlo simulation, with  stratified sampling on initial crack size, is used to generate weldment reliability results.

5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

There is essentially no limitation with PC-PRAISE but for large number of replications used in the Monte Carlo simulation scheme, computation time may become prohibitive.

6. TYPICAL RUNNING TIME

The time requirements for the sample problems ranges from 50 minutes to 1.5 hours on 33MHz 80486 with 8MB of RAM.

The program PRAISE was executed at the NEA-DB on a PC DELL Optiplex GXM 5100 equipped with a Pentium processor of 99 Mhz,  base memory 640 Kbyte and extended memory 32 MByte. The execution times to run the eleven sample problems of the program PRAISE which  are provided with the package are respectively 3, 6, 9, 13, 5, 1, 9, 21, 6, 9, 17 minutes.

7. UNUSUAL FEATURES OF THE PROGRAM

The unique features of PC-PRAISE include independent two-dimensional treatment of crack growth in directions of the depth as well as the width and the statistical treatment of various variables associated with the fracture mechanics model.

8. RELATED AND AUXILIARY PROGRAMS

PC-PRAISE was adapted from its mainframe version of the PRAISE code which may be operating on both  CDC7600 and Cray computers.

10. REFERENCES

- G.S. Holman and C.K. Chou:
  Probability of Failure in BWR Reactor Coolant Piping Vol.1:
  Summary report, NUREG/CR-4792 (UCID-20914) Vol.1, (March 1990)
- T. Lo et al.:
  Probability of Failure in BWR Reactor Coolant Piping Vol.2:
  Pipe Failure Induced by Crack Growth and Failure of Intermediate
  Supports, NUREG/CR-4792 (UCID-20914) Vol.2, (March 1989)
- D.O. Harris et al.:
  Probability of Failure in BWR Reactor Coolant Piping Vol.3:
  Probabilistic Treatment of Stress Corrosion Cracking in 304 and
  316NG BWR Piping Weldments
  NUREG/CR-4792 (UCID-20914) Vol.1, (December 1986)
- D.O. Harris et al.:
  Fracture Mechanics Models Developed for Piping Reliability
  Assessment in Light Water Reactors Piping Reliability Project
  NUREG/CR-2301 (UCID-15490) (June 1982)
- Nancy Storch et al.:
  TV80LIB Graphics Library, LCSD 436 Rev.0, February 3, 1981
- E.Y. Lim:
  Probability of Pipe Fracture in a Primary Coolant Loop of a PWR
  Plant, vol. 9: PRAISE Computer Code User's Manual, Load
  Combination Program Project I Final Report
  NUREG/CR-2189 (UCID-18967) August 1981
- T. Lo and R.W. Mensing:
  Probability of Pipe Failure in the Reactor Coolant Loops of
  Combustion Engineering PWR Plants, Vol.2: Pipe Failure Induced
  by Crack Growth
  NUREG/CR-3663 (UCRL-53500) September 1984

- D.O. Harris et al:
  Theoretical and User's Manual for pc-PRAISE
  A Probabilistic Fracture Mechanics Computer Code for Piping
  Reliability Analysis
  NUREG/CR-5864 (UCRL-ID-109798) (July 1992)

11. MACHINE REQUIREMENTS

PC-PRAISE can be executed on any XT, 386, or  486 personal computers. For reasonable running time, it is recommended that a 386/33 PC with a 387/33 math coprocessor at the minimum is to be used.

The program PRAISE was executed at the NEA-DB on a PC DELL Optiplex GXM 5100 equipped with a Pentium processor of 99 Mhz,  base memory 640 Kbyte and extended memory 32 MByte, under MS-DOS 6.2 About 1.6 Mbyte of diskspace are required to hold ALL the package files. The filesize of the four executables are: PRAISE.EXE (252 Kbyte), PR_INPUT.EXE (93 Kbyte), PR_PLOT.EXE (151 Kbyte) and HPLASER.EXE (41 Kbyte).

13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED:  DOS.

The program PRAISE was executed at the NEA-DB under MS-DOS 6.2. The executables of program PRAISE and of the pre-processor program PR_INPUT have been created using the MicroSoft Fortran compiler (Version 5.10) and linker (Version 5.15).

14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS

The
input file name must have a ".DAT" filename extension.

15. NAME AND ESTABLISHMENT OF AUTHORS

   S. Lu and G.S. Holman
   Lawrence Livermore National Lab., CA (United States)
   D.O. Harris
   Failure Analysis Associates, Inc.
   Menlo Park, CA (United States)

File name	File description	Records
ESTS0071_01.001	Information file of program PC-PRAISE	423
ESTS0071_01.002	Notes on PC-PRAISE	132
ESTS0071_01.003	Source file # 1, program PRAISE	1820
ESTS0071_01.004	Source file # 2, program PRAISE	1967
ESTS0071_01.005	Source file # 3, program PRAISE	1454
ESTS0071_01.006	Source file # 4, program PRAISE	2088
ESTS0071_01.007	Source file # 5, program PRAISE	2034
ESTS0071_01.008	Source file # 6, program PRAISE	890
ESTS0071_01.009	Source file # 7, program PRAISE	1207
ESTS0071_01.010	Source file, input pre-processor PR_INPUT	1162
ESTS0071_01.011	Include file,input pre-processor PR_INPUT	19
ESTS0071_01.012	Auxiliary source code	509
ESTS0071_01.013	BASIC source file # 1, aux. program PR_PLOT	1262
ESTS0071_01.014	BASIC source file # 2, aux. program PR_PLOT	330
ESTS0071_01.015	PC-executable file of program PRAISE	0
ESTS0071_01.016	PC-executable file of program PR_INPUT	0
ESTS0071_01.017	PC-executable file of program PR_PLOT	0
ESTS0071_01.018	PC-executable file for HP LaserJet printers	0
ESTS0071_01.019	Data file required for running PRAISE.EXE	225
ESTS0071_01.020	Library file required for running PRAISE.EXE	0
ESTS0071_01.021	Template file for the demonstration problem	0
ESTS0071_01.022	Input file for PRAISE, created by PR_INPUT	14
ESTS0071_01.023	Sample input file, problem # 1	15
ESTS0071_01.024	Sample output file, problem # 1	369
ESTS0071_01.025	Sample output file, problem # 1	22
ESTS0071_01.026	Sample output file, problem # 1	22
ESTS0071_01.027	Sample output file, problem # 1	22
ESTS0071_01.028	Sample output file, problem # 1	201
ESTS0071_01.029	Sample input file, problem # 2	14
ESTS0071_01.030	Sample output file, problem # 3	1314
ESTS0071_01.031	Sample output file, problem # 2	22
ESTS0071_01.032	Sample output file, problem # 2	22
ESTS0071_01.033	Sample output file, problem # 2	22
ESTS0071_01.034	Sample output file, problem # 2	169
ESTS0071_01.035	Sample input file, problem # 3	126
ESTS0071_01.036	Sample output file, problem # 3	419
ESTS0071_01.037	Sample output file, problem # 3	22
ESTS0071_01.038	Sample output file, problem # 3	22
ESTS0071_01.039	Sample output file, problem # 3	22
ESTS0071_01.040	Sample output file, problem # 3	169
ESTS0071_01.041	Sample input file, problem # 4	48
ESTS0071_01.042	Sample output file, problem # 4	522
ESTS0071_01.043	Sample output file, problem # 4	110
ESTS0071_01.044	Sample output file, problem # 4	110
ESTS0071_01.045	Sample output file, problem # 4	110
ESTS0071_01.046	Sample output file, problem # 4	169
ESTS0071_01.047	Sample input file, problem # 5	15
ESTS0071_01.048	Sample output file, problem # 5	304
ESTS0071_01.049	Sample output file, problem # 5	8
ESTS0071_01.050	Sample output file, problem # 5	8
ESTS0071_01.051	Sample output file, problem # 5	8
ESTS0071_01.052	Sample output file, problem # 5	201
ESTS0071_01.053	Sample input file, problem # 6	12
ESTS0071_01.054	Sample output file, problem # 6	253
ESTS0071_01.055	Sample output file, problem # 6	12
ESTS0071_01.056	Sample output file, problem # 6	12
ESTS0071_01.057	Sample output file, problem # 6	12
ESTS0071_01.058	Sample output file, problem # 6	3
ESTS0071_01.059	Sample input file, problem # 7	12
ESTS0071_01.060	Sample output file, problem # 7	306
ESTS0071_01.061	Sample output file, problem # 7	22
ESTS0071_01.062	Sample output file, problem # 7	22
ESTS0071_01.063	Sample output file, problem # 7	22
ESTS0071_01.064	Sample output file, problem # 7	3
ESTS0071_01.065	Sample input file, problem # 8	16
ESTS0071_01.066	Sample output file, problem # 8	343
ESTS0071_01.067	Sample output file, problem # 8	22
ESTS0071_01.068	Sample output file, problem # 8	22
ESTS0071_01.069	Sample output file, problem # 8	22
ESTS0071_01.070	Sample output file, problem # 8	3
ESTS0071_01.071	Sample input file, problem # 9	17
ESTS0071_01.072	Sample output file, problem # 9	403
ESTS0071_01.073	Sample output file, problem # 9	22
ESTS0071_01.074	Sample output file, problem # 9	22
ESTS0071_01.075	Sample output file, problem # 9	22
ESTS0071_01.076	Sample output file, problem # 9	201
ESTS0071_01.077	Sample input file, problem # 10	20
ESTS0071_01.078	Sample output file, problem # 10	485
ESTS0071_01.079	Sample output file, problem # 10	22
ESTS0071_01.080	Sample output file, problem # 10	22
ESTS0071_01.081	Sample output file, problem # 10	22
ESTS0071_01.082	Sample output file, problem # 10	201
ESTS0071_01.083	Sample input file, problem # 11	54
ESTS0071_01.084	Sample output file, problem # 11	656
ESTS0071_01.085	Sample output file, problem # 11	110
ESTS0071_01.086	Sample output file, problem # 11	110
ESTS0071_01.087	Sample output file, problem # 11	110
ESTS0071_01.088	Sample output file, problem # 11	201
ESTS0071_01.089	DOS file-names	88