Emergency Response Exercise at Kola NPP

30.08.2014

The emergency response exercise was held on August 27-29, 2014 at Kola NPP with the purpose to check preparedness and upgrade the practical skills of the Kola NPP staff, OPAS (urgent support to NPPs) group, structural subdivisions of the Concern Rosenergoatom, Situation and Crisis Center, Technical Support Center in performance of organization measures and implementation of works on localization and elimination of emergencies. The progress of drills was observed by the representatives of the Information and Analytical Center of Rostechnadzor by means of videoconference.

On the first day of the exercise the scenario of “primary-to-secondary leak” accident with the flowrate exceeding 150 t/h was considered, also involving non-closure of the main isolation valve of the primary circuit emergency loop and non-seating of the safety valve of the emergency steam generator, as well as failure of two out of three channels of the active part of the emergency core cooling system.

On the second day the scenario of total blackout of all four Kola NPP units as a result of rupture of power transmission lines and failure of all diesel-generators to start was considered. SEC NRS specialists within the scope of the Rostechnadzor’s IAC working groups performed assessment of the state of NPP critical safety functions and forecast of their change, as well as evaluation of the radiation situation around NPP. For these purposes the computer models of four Kola NPP units on the basis of software complexes “Rainbow 7.5”, “MVTU 3.7”, “INTEGR” developed in the Laboratory of NPP Safety Division in charge of dynamic modes, as well as special-purpose codes for calculation of radiation situation, were used.

Based on the results of the exercise the specialists of working groups assessed the actions of the operating organization and formulated recommendations on enhancement of emergency preparedness, in particular, of the NPP emergency response documentation.

The obvious benefit from the regular exercises should be noted both for the operating organization and organizations engaged in emergency response actions, and for the regulatory authority. 


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