ESTS0071: PC-PRAISE, BWR Piping Reliability Analysis

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ESTS0071 PC-PRAISE. (Abstract last modified 19-JUN-1997)

PC-PRAISE, BWR Piping Reliability Analysis

Abstract Table of Contents:

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

2. COMPUTER FOR WHICH PROGRAM IS DESIGNED AND OTHER MACHINE VERSION PACKAGES AVAILABLE -

To request or retrieve programs click on the one of the active versions below. A password and special authorization is required.

Explanation of the status codes.

Program-name Package-ID Status PC-PRAISE ESTS0071/01 Tested

Machines used: Package-ID Orig.Computer Test Computer ESTS0071/01 IBM PC PC Pentium 100

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.

ESTS0071/01:

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.

9. STATUS
ESTS0071/01: 19-JUN-1997 Tested at NEADB

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
ESTS0071/01:
- 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.

ESTS0071/01:

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).

12. PROGRAMMING LANGUAGE(S) USED -
ESTS0071/01: FORTRAN+BASIC

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

ESTS0071/01:

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)

17. CATEGORIES -

- G. Radiological Safety, Hazard and Accident Analysis
- I. Deformation and Stress Distributions, Structural Analysis and Engineering Design Studies

Keywords: BWR REACTORS, LEAKS, PIPE JOINTS, PROBABILISTIC SYS ASSESSMENT, SYSTEM FAILURE ANALYSIS