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APPENDIX

RadiaTION SAFETY

The collective dose value at the NPP V-1 Bohunice rose during the general overhaul of unit 2. Dose values in 2001 are lower in comparison with the previous years, which is caused by completion of the NPP V-1 Bohunice backfitting.
On NPP Mochovce units 1 and 2 an overwhelming majority of works involving higher radiation risk were carried out over the period of shutdowns from 30 December 2000 to 24 March 2001 (85 days for Unit 1) and from 31 March 2001 to 29 May 2001 (60 days for Unit 2).
The number of employees of NPP together with suppliers was 1,804 in NPP V-1 Bohunice, 1,852 in NPP V-2 Bohunice and 1,944 in NPP Mochovce.

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Collective dose S [manmSv] to staff of NPP´s and supplier organisations

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Maximum individual dose E [mSv] to staff of NPP´s and supplier organisations

None of limits were exceeded in the area of gaseous and liquid discharges. Gaseous limits at the NPP V-1 Bohunice had a measurable yet minimum impact on the environs. The measurable impact was caused by higher discharges of rare gases and iodine discharges associated with the general overhaul to Units 1 and 2. The source of higher gaseous discharges from the NPP V-1 Bohunice were three non-tight assemblies.
During the general overhaul to Unit 2, the investigation level of iodine discharges was exceeded (investigation level 37 MBq/day) through the ventilation flue. During the general overhaul there an increased discharge of gases through the ventilation flue of V-1 Bohunice during PO desealing and in the course of performing spent fuel pool was also recorded.
In concluding it can be stated that the operation of the NPP V-1 and V-2 Bohunice for 2001 had a negligible impact upon its environs.
The values of discharges from the ventilation flue and of liquid discharges into the Hron river were low; the impact of radioactive substance discharges upon the environs is minimal. According to the classification of non-standard states on radiation safety, four violations of the radiation safety rules and 40 classified deviations from the radiation protection programme were recorded over the followed period in 2001. The state of radiation protection at the NPP Mochovce for 2001 was good over the period assessed. During this period no major problems emerged in radiation safety terms in the controlled zone of the NPP Mochovce.
None radiation events or accidents arose over the followed period at the NPP V-1 and V-2 Bohunice and the NPP Mochovce.
In measurements made by Dosimetry laboratories in LRKO Levice and LVD Trnava in the course of 2001 never a one positively statistically proved value above the long-term average of the background measured in the environment or measured samples thereof from the monitored environs of the NPP V-1 and V-2 Bohunice and the NPP Mochovce (where an increased but permitted value of tritium can be registered in the samples of water from the Hron river during discharge of the control reservoirs) occurred.

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Discharges into the atmosphere and hydrosphere


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