A SIMPLE METHOD FOR KNOWING THE DOWNWIND CONCENTRATIONS AROUND ISPRA
During a nuclear accident the most important parameter is the location and the intensity of the maximum concentration at ground level. The influence of the ground elevation around the nuclear reactor has been considered by reducing the height of the chimney to the difference between its height and the altitude of the ground at the point of assessment. The dilution factor at fifty points up to ten kilometers, due to a discharge of 1 curie and to 1 m/sec wind speed for Pasquill's categories B and D and 2 m/sec for category F, have been computed with a FORTRAN program for an IBM-370. These have been validated with A-41 discharges. This matrix of fifty lines and three columns was introduced into a BASIC program, which demands as input a number which is the source emission. The printout lists 50 places in the emergency plan, which are followed by the three dilution factors for unstable, neutral and stable conditions. Because of its short run time, this program can be repeated each minute, so can be considered a real time method. A Hewlett-Packard-85 personal computer was chosen because of low weight and low electric power consumption. A HP cassette contains the program and can save other programs or a file of data.
Bibliographic Reference: WORKSHOP ON REAL TIME COMPUTING OF THE ENVIRONMENTAL CONSEQUENCES OF ACCIDENTAL RELEASE, LUXEMBOURG (GRAND- DUCHY OF LUXEMBOURG), SEPT. 17-19, 1985 WRITE TO CEC LUXEMBOURG, DG XIII/A2, POB 1907 MENTIONING PAPER E 31992 ORA
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Record Number: 1989124019100 / Last updated on: 1987-01-01
Available languages: en