NESC1090 RCSLK9.

1. NAME OR DESIGNATION OF PROGRAM:  RCSLK9.

3. DESCRIPTION OF PROGRAM OR FUNCTION

RCSLK9 was developed to analyze the leak tightness of the primary coolant system for any pressurized water reactor (PWR). From given system conditions, water levels in tanks, and certain system design parameters, RCSLK9 calculates the loss of water from the reactor coolant system (RCS) and the increase of water in the leakage collection system during an arbitrary time interval. The program determines the system leak rates and displays  or prints a report of the results. During the initial application to a specific reactor, RCSLK9 creates a file of system parameters and saves it for future use.

4. METHOD OF SOLUTION

RCSLK9 provides the inspector with the capability to independently analyze the leak tightness of PWR reactor coolant systems. By taking two sets of water inventory data  in the RCS and in leak collection tanks, separated by a time interval, and applying RCSLK9, the inspector can obtain the gross leak rate for the RCS and the rate at which the leakage is being collected. The gross leak rate for the cooling system is found by dividing the inventory loss in pounds by the product of the elapsed  time between inventories and the density of water. The quotient is converted to gallons per minute. To determine the identified leak rate for the RCS and the chemical and volume control system (CVCS) during the test, the amount of water collected in the pressurizer relief tank and the reactor drain tank must be calculated. Water inventories for the pressurizer relief tank and the reactor drain tank are determined from measured levels and the tank calibration curves or tank dimensions. To find the identified leak rate for the  cooling system, RCSLK9 divides the combined inventory gain in pounds for the reactor drain tank and the pressurizer relief tank by the product of the elapsed time between inventories and the density of water. The test data required for calculating the identified leak rate are the water levels in the tanks and the test duration. The unidentified leak rate is calculated by subtracting the identified leak rate from the gross leak rate.

5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

RCSLK9 assumes that  the hot and cold legs of the RCS have equal volumes.

6. TYPICAL RUNNING TIME

Only a few seconds are required to perform the leak calculations on an IBM PC/AT.

7. UNUSUAL FEATURES OF THE PROGRAM:

8. RELATED AND AUXILIARY PROGRAMS

RCSLK9 was adapted from RCSLK8, which was written in CBASIC for the Osborne 1 computer.

10. REFERENCES:

- D.C. Kirkpatrick, R.W. Woodruff, and R.A. Holland :
  RCSLK9: Reactor Coolant System Leak Rate Determination for PWRs
  User's Guide
  NUREG-1107 (December 1984)
- D.C. Kirkpatrick, R.W. Woodruff, and P. Bell :
  RCSLK9: Reactor Coolant System Leak Rate Determination for PWRs
  User's Guide: Installation Procedures
  NUREG-1107 ADDENDUM (December 1986)
- L. Eyberger :
  RCSLK9 Flexible Disk Cartridge Description
  and Implementation Information
  NESC Note 87-66 (May 14, 1987)

11. MACHINE REQUIREMENTS

IBM PC, or compatible, with one double-sided  disk drive and 64K bytes or greater RAM.

13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED:  DOS 2.0, 2.10.

The test case was run on a IBM PC/AT under MS/DOS 3.21  with BASIC version D3.21.

14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS

The nomenclature in the reference report is appropriate for Westinghouse PWRs.

15. NAME AND ESTABLISHMENT OF AUTHORS

          D.C. Kirkpatrick
          Office of Nuclear Reactor Regulation
          U.S. Nuclear Regulatory Commission

File name	File description	Records
NESC1090_01.001	INFORMATION FILE	94
NESC1090_01.002	RCSLK9 BASIC SOURCE	1133
NESC1090_01.003	CALC BASIC SOURCE	557
NESC1090_01.004	LIST OF DOCKET NUMBERS	18
NESC1090_01.005	POLISADES 1 PARAMETER LIST	45
NESC1090_01.006	POINT BEACH 1 PARAMETER LIST	45
NESC1090_01.007	PRAIRIE ISLAND 1 PARAMETER LIST	45
NESC1090_01.008	ZION 1 PARAMETER LIST	45
NESC1090_01.009	POINT BEACH 2 PARAMETER LIST	45
NESC1090_01.010	ZION 2 PARAMETER LIST	45
NESC1090_01.011	KEWAUNEE 1 PARAMETER LIST	45
NESC1090_01.012	PRAIRIE ISLAND 2 PARAMETER LIST	45
NESC1090_01.013	RANCHO SECO 1 PARAMETER LIST	45
NESC1090_01.014	D. C. COOK 1 PARAMETER LIST	45
NESC1090_01.015	D. C. COOK 2 PARAMETER LIST	45
NESC1090_01.016	CALVERT CLIFFS 1 PARAMETER LIST	45
NESC1090_01.017	CALVERT CLIFFS 2 PARAMETER LIST	45
NESC1090_01.018	THREE MILE ISLAND 2 PARAMETER LIST	45
NESC1090_01.019	TROJAN 1 PARAMETER LIST	45
NESC1090_01.020	DAVIS BESSE 1 PARAMETER LIST	45
NESC1090_01.021	FARLEY 1 PARAMETER LIST	45
NESC1090_01.022	LOGO BASIC SOURCE	46
NESC1090_01.023	BATCH FILE TO EXECUTE LOGO	1
NESC1090_01.024	BATCH FILE TO EXECUTE LOGO	1
NESC1090_01.025	BATCH FILE TO EXECUTE RCSLK9	1
NESC1090_01.026	BATCH FILE TO SET UP A BOOTABLE DISK	3
NESC1090_01.027	DOS file names	26