1. NAME AND TITLE

INVENT: A Radionuclide Inventory and Hazard Index Code.

2. CONTRIBUTOR

Associated Nuclear Services, EPSOM, Surrey, UK through NEA Data Bank, France.

3. CODING LANGUAGE AND COMPUTER

Fortran 77, VAX.

4. NATURE OF PROBLEM SOLVED

INVENT is designed to facilitate the post-closure radiological assessment of land-based repositories for low and intermediate-level waste.

5. METHOD OF SOLUTION

INVENT calculates hazard indices for individual nuclides for both ingestion and inhalation routes, by multiplying the time-dependent activity by an appropriate value of the committed effective dose equivalent per unit intake of activity, as given in ICRP Publication 30.

6. RESTRICTIONS OR LIMITATIONS

None noted.

7. TYPICAL RUNNING TIME

On a VAX 8810, the module INVENT took 1.06 seconds; DFSTOR took 0.45 seconds; GAMMA1 took 0.61 seconds.

8. COMPUTER HARDWARE REQUIREMENTS

INVENT runs on the VAX family of computers.

9. COMPUTER SOFTWARE REQUIREMENTS

A Fortran 77 compiler is required. The operating system for the VAX is VMS.

10. REFERENCES

D. J. Nancarrow and M. C. Thorne, "User's Guide to the Radionuclide Inventory and Hazard Index Code INVENT," ANS Report No. 595-1 (May 1986).

D. J. Nancarrow and M. C. Thorne, "Programmer's Guide to the Radionuclide Inventory and Hazard Index Code INVENT," ANS Report No. 595-2 (May 1986).

D. J. Nancarrow and M. C. Thorne, "Test Documentation for the Radionuclide Inventory and Hazard Index Code INVENT," ANS Report No. 595-3 (May 1986).

11. CONTENTS OF CODE PACKAGE

Included are the referenced document and one (360KB) DOS diskette containing the source and sample cases.

12. DATE OF ABSTRACT

October 1990.