Nuclear Installation Event at OLKILUOTO-2

Print View Posted on: 10 December 2020

Event Date: 10 December 2020 Event Type: Power Reactor
Event Location: Finland, OLKILUOTO-2 INES Rating: 0 (Final)

At the Olkiluoto 2 safety function I-isolation (high radiation in steam pipelines) occurred.

Isolation was occurred because of short radioactive pulse.

All safety systems/functions were available (INES 0)

The reactor was shut down. Primary circuit water chemical analysis indicates that there is no fuel damage. Source of the activity under investigation.

Dose rate measurement report of facility area attached. All measurements are in normal range.

Olkiluoto 1 at 100% power.

INES Rating: 0 - Below scale (Final) as per 10 December 2020
Release beyond authorized limits? No
Overexposure of a member of the public? No
Overexposure of a worker? No
Contamination spread within the facility? No
Damage to radiological barriers (incl. fuel damage) within the facility? No
Degradation of Defence In-Depth No
Person injured physically or casualty? No
Is there a continuing problem? No
Related Information
http://www.stuk.fi

Tomi Koskiniemi
Radiation and Nuclear Safety Authority (STUK)
tomi.koskiniemi@stuk.fi
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