RSICC CODE PACKAGE PSR-381

1. NAME AND TITLE

OMCOST: Code System for Non-fuel O & M Cost Estimation for Large Steam-Electric Power Plants.

2. CONTRIBUTORS

Oak Ridge National Laboratory, Oak Ridge, Tennessee through the Energy Science and Technology Software Center, Oak Ridge, Tennessee.

3. CODING LANGUAGE AND COMPUTER

FORTRAN IV; IBM3033 (P00381I303300).

4. NATURE OF PROBLEM SOLVED

OMCOST estimates annual nonfuel operation and maintenance (O&M) costs for large steam-electric power plants, specifically light-water-reactor (LWR) and coal-fired plants. Estimates for coal-fired plants include the option of scrubbing for flue-gas desulfurization (FGD). Four basic O&M cost-estimating models for steam-electric power plants are available: a coal-fired with wet limestone FGD system, a coal-fired with dry FGD system, a coal-fired without an FGD system, and an LWR.

5. METHOD OF SOLUTION

The cost models are based on early 1982 costs. Escalation rates are included for wages, materials, supplies, government and commercial liability insurance, inspection fees, sludge disposal, lime and limestone costs, property insurance, and replacement power insurance. Variables are assigned default values within the program to permit the calculation of an example LWR plant. A coal-fired plant can be run with no input except plant type and net electrical output. The options available are: (1) a general escalation rate to replace the separate escalation rates, (2) the number of units per plant (up to four), (3) wage rates, (4) operator fringe benefits, (5) plant supervision expenses, (6) heating value of coal, (7) sulfur content, (8) tons of lime or limestone per ton of sulfur, and (9) unit costs of purchased lime or limestone and ash and sludge disposal. The user may specify one, two, three, or four units per plant with O&M costs for all units escalated to a single specified year.

6. RESTRICTIONS OR LIMITATIONS

It is not possible to produce incremental O&M cost estimates for individual units in multiple-unit plants, either in constant-year dollars or in current-year dollars, except by multiple computer runs and hand-calculated differences and escalations. This produces incremental O&M cost estimates for each additional unit but does not accurately represent the average cost per unit, which can be better approximated by dividing total annual O&M costs for the multiple-unit plant by the number of units. Total O&M cost estimates, as units are added to the multiple-unit plants, can be predicted by specifying, for example, a single-unit plant in the initial year of operation of the first unit or a two-unit plant in the initial year of operation of the second unit.

7. TYPICAL RUNNING TIME

Execution time for twenty cases is approximately 1 second on the IBM3033. NESC ran the sample problem in less than 1 second on an IBM370/195.

8. COMPUTER HARDWARE REQUIREMENTS

142K bytes of storage are needed on an IBM mainframe computer.

9. COMPUTER SOFTWARE REQUIREMENTS

OMCOST ran on the following operating systems: OS/360, OS/370, and OS/3033. A Fortran IV compiler is required. The codes were tested when they were contributed to NESC in 1982 but were not tested or modified when transferred to RSICC and released in March 2001.

10. REFERENCES

M.L. Myers, L.C. Fuller, and H.I. Bowers, "Nonfuel Operation and Maintenance Costs for Large Steam-Electric Power Plants 1982," NUREG/CR-2844, ORNL/TM-8324 (September 1982).

M. Birgersson, "OMCOST, NESC No. 688, OMCOST Tape Description and Implementation Information," NESC Note 83-18 (November 17, 1982).

11. CONTENTS OF CODE PACKAGE

Included are the referenced documents and one DS/HD diskette which contains the Fortran source codes and sample problem input written in DOS format.

12. DATE OF ABSTRACT

March 2001.

KEYWORDS: COST ANALYSIS; ECONOMICS; LWR