Calculation of the maximum expected dose for technical radiophysicists a cobalt machine

Considering the daily operations carried out by technicians Medical Radiation Physics Department of Radiation Oncology Service V. General Teaching Hospital I. Lenin in the city of Holguin, during a business week (between Monday and Friday) as an important element for calculation of the maximum expected dose (MDE). From the decay law exponential which is under the source activity, we propose corrections to the cumulative doses in the weekly period, leading to obtaining a formula which takes into account the cumulative doses during working days and considers the non-cumulative doses on days of rest (Saturday and Sunday). The estimated correction factor made from a series expansion is convergent power truncated at the n-th term coincides with the week of the period for which want to calculate the dose. As initial condition is adopted dose rate environmental equivalent measurement at a given instant, which allows estimating the MDE in moments after or before this. Calculations were proposed use of an Excel spreadsheet that allows a simple and accessible processing of the formula obtained. (author)