NESC0797 HAARM-S.

1. NAME OR DESIGNATION OF PROGRAM:  HAARM-S

3. DESCRIPTION OF PROBLEM OR FUNCTION

HAARM3, an acronym for Heterogeneous Aerosol Agglomeration Revised Model 3, is the third program in the HAARM series developed to predict the time-dependent behaviour of radioactive aerosols under postulated LMFBR accident conditions. HAARM3 was developed to include mechanisms of aerosol growth and removal which has not been accounted for in the earlier models. In addition, experimental measurements obtained on sodium oxide aerosols have been incorporated in the code. As in HAARM2, containment gas temperature, pressure, and temperature gradients normal to interior surfaces are permitted to vary with time.  

The effects of reduced density on sodium oxide agglomerate behaviour and of nonspherical shape of particles on aerosol behaviour mechanisms are taken into account, and aerosol agglomeration due to turbulent air motion is considered. Also included is a capability to calculate aerosol concentration attenuation factors and to restart problems requiring long computing times.

HAARM-S: This is a development of the HAARM-3 code with the following specific features:
- The computational speed is increased by a factor of 5 by using an improved integration method for "stiff" differential equations.
- The model can handle up to 15 sequential compartments.
- A granular filter can be handled by dividing the bed into a number of zones.
- The atmosphere can consist of a mixture of air and steam.
- The input data have been divided into logical groups with a block head for each group.

4. METHOD OF SOLUTION

HAARM3 assumes the time-dependent particle size distribution is log-normal and coverts the integro-differential equation describing the concentration decay of aerosol into three first-order differential equations which are integrated using a standard library subroutine. The present model allows the method of  integration to be specified. The choices are: Adams Moulton with either a fixed or variable step-size and Runge-Kutta with a fixed step-size.

5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

Maxima of -
   1000 time-steps
     42 discrete radii for the distribution calculations

6. TYPICAL RUNNING TIME

The sample problems each take 1 second of CP time on CDC7600.

7. UNUSUAL FEATURES OF THE PROGRAM:

8. RELATED AND AUXILIARY PROGRAMS

Various models have been developed  to describe aerosol behavior under postulated accident conditions including the TRAP code at Brookhaven National Laboratory (Nuclear Science and Engineering, Vol. 42, pp. 58-63, 1970), the PARDISEKO3 code at Karlsruhe (KFK 2151, May 1975), and the HAA3B code at Atomics International (NESC Abstract 443). HAARM3 can be used to provide the input data for dose calculations, such as COMRADEX4 (NESC Abstract 663).

10. REFERENCES

- J.A. Gieseke, K.W. Lee and L.D. Reed,
HAARM-3 Users Manual, BMI-NUREG-1991 with Errata, January 5, 1978.
- J.A. Gieseke, L.D. Reed, H. Jordan, and K.W. Lee,
Characteristics of Agglomerates of Sodium Oxide Aerosol Particles, BMI-NUREG-1977, August 1, 1977.
- L.D. Reed and J.A. Gieseke, HAARM-1 Users Manual, BMI-X-658, May 15, 1975.
- L.D. Reed and J.A. Gieseke, Users Manual, BMI-X-665, October 31, 1975.
- R.S. Hubner, E.U. Vaughan, and L. Baurmash, HAA-3 User Report, AI-AEC-13038, March 1973.

- H. Haeggblom:
  FILTRA-B 39/81. HAARM-S, User's Manual.
  STUDSVIK-82/198  (November 1982)
- Hans Haeggblom:
  HAARM-S - Users' Manual, Version 1983.
  STUDSVIK/NR-83/298  (September 14, 1983)

11. MACHINE REQUIREMENTS:  117000 (octal) words of storage are required.

13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED:  NOS/BE 1.0 (CDC CYBER73), SCOPE 2.1.3.(CDC7600).

14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS:

15. NAME AND ESTABLISHMENT OF AUTHOR

J.A. Gieseke, K.W. Lee, and L.D. Reed
Columbus Laboratories
Battelle
505 King Avenue
Columbus, Ohio 43201

HAARM-S:
H. Haggblom
Studsvik Energiteknik AB
S-611 82 Nykoping, Sweden

File name	File description	Records
NESC0797_02.003	HAARM-S INFORMATION FILE	34
NESC0797_02.004	HAARM-S SOURCE PROGRAM (FORTRAN-4)	4857
NESC0797_02.005	HAARM-S INPUT DATA FOR TEST CASE	47
NESC0797_02.006	HAARM-S JCL	14
NESC0797_02.007	HAARM-S PRINTED OUTPUT OF TEST CASE	2847