1. NAME AND TITLE

PRISIM: Plant Risk Status Information Management System

2. CONTRIBUTOR

JBF Associates, Knoxville, Tennessee, and Oak Ridge National Laboratory, Oak Ridge, Tennessee.

3. CODING LANGUAGE AND COMPUTER

C and Modula 2; IBM PC, IBM PC/XT, IBM PC/AT.

4. NATURE OF PROBLEM SOLVED

PRISIM allows inspectors to quickly access probabilistic risk assessment (PRA) information and use it to update risk analysis results, reflecting a nuclear plant's status at any time. PRISIM also allows regulators to access PRA information and modify the information to assess the impact the changes may have on plant safety.

5. METHOD OF SOLUTIONS

The PRA results in PRISIM are based on core damage frequency. PRISIM does not incorporate the results of assessments of plant damage, containment responses, or public health consequences. Only point estimate PRA results are presented.

6. RESTRICTIONS OR LIMITATIONS

Many of the results in PRISIM do not reflect the effects of operator recovery actions. Recovery actions are actions that operators can take to maintain core cooling during accidents involving failures of the designed emergency cooling system.

7. TYPICAL RUNNING TIME

The code is highly interactive and response time is very quick.

8. COMPUTER HARDWARE REQUIREMENTS

PRISIM runs on the IBM PC and compatibles with a math co-processor, 640 K of memory, EGA or VGA graphics. PRISIM requires 13 mb of hard disk storage.

9. COMPUTER SOFTWARE REQUIREMENTS

The code was written is in C and Modula 2. PRISIM will run under DOS 2.1 or higher operating system.

10. REFERENCE

a. Included in the documentation:

``Instructions For Installing ANO-1 PRISIM,'' informal notes ( 1 page).

D. J. Campbell et al., User's Guide For PRISIM Arkansas Nuclear One - Unit 1, Volume 1, Program For Inspectors, NUREG/CR-5021 (vol. 1), ORNL/TM-10604/V1, Oak Ridge, Tennessee, March 1988.

D. J. Campbell et al., User's Guide For PRISIM Arkansas Nuclear One - Unit 1, Volume 2, Program For Regulators, NUREG/CR-5021 (vol. 2), ORNL/TM-10604/V2, Oak Ridge, Tennessee, March 1988.

11. CONTENTS OF CODE PACKAGE

Included are the referenced documents and two DS/HD 5.25-inch diskettes (1.2 MB) which include the executable programs necessary to run PRISIM.

12. DATE OF ABSTRACT

December 1990.