Plant area monitoring at Krško

Post-Fukushima upgrades at Krško in Slovenia (www.nek.si) are being implemented in accordance with the requirements of the national regulator and the plant owners. The first phase, including a passive containment vent filtering system and hydrogen recombiners, is already completed.

The next phase in 2014-2018 will cover the emergency control room, a new technical support centre, reconstruction of an operation support centre, alternate cooling features for removing decay heat and on-site flood protection.

A third emergency diesel generator was commissioned in 2012 following an earlier periodic safety review, as was extended flood protection provided by higher dikes along the Sava river. All new mobile equipment (such as diesel generators, air compressors, pumps, a firefighting vehicle and a radiation monitoring van) is stored in a flood protected and seismically qualified building which is more than 100 m away from the reactor building.

Generally speaking, radiation protection coverage based on area monitors, airborne contamination monitors (installed or transportable) and routine or non-routine surveys performed by RP technicians.
The normal and post-accident (post TMI) plant radiation and effluent monitoring system is relatively new version and was supplied by Merlin Gerin Provence (Mirion) and Sentry during an earlier upgrade, mainly based on the requirements of NRC RG 1.97. These monitors require an external power supply.

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