The prototype is equipped with an automatic reactor fill system that can flood the reactor with borated water in the event of a loss of coolant accident.

Voids may also form if coolant is lost from the reactor in some sort of accident (called a loss of coolant accident, which has other dangers).

Loss of coolant accident.

The depressurisation is to be avoided as it will worsen a loss of coolant accident and may initiate an explosion when none may have happened.

One disadvantage of metallic zirconium is that in the case of a loss of coolant accident (LOCA) in a nuclear reactor, zirconium cladding rapidly reacts with water steam at high temperature.

The station has reactors housed in a reactor building with double shell containment ensuring total protection even in the remotest possibility of loss of coolant accident.

K-19 (1961; Hotel-class submarine; two loss of coolant accidents, 27 killed due to one accident)

If a VVER-1200 experiences a loss of coolant accident or loss of power accident the turbogenerators 'coast down' for 30 seconds, during which time a shutdown can be initiated using residual power in the system.

This improves safety as it reduces the probability of a loss of coolant accident dramatically, and allows for passively safe designs.

LAIRD trials simulated loss of coolant accidents to prove the effectiveness of systems designed to protect the reactor in loss-of-coolant accidents.