On March 02, 1997 monthly Emergency Core Cooling System (ECCS) test was in progress. While carrying out the injection test, fluctuation in the Primary Heat Transport (PHT) system pressure was observed. Subsequently PHT system pressure went up to 89 kg/cm2. During this transient bleed flow increased steeply due to bleed control valve stuck open for about 80 secs. To cope up with bleed flow, feed control valves also got opened. Reacor set back got initiated due to bleed condenser high level. This was flollowed by reactor tip on PHT system pressure low. Further fall of PHT system pressure initated ECCS actuation. Subsequently PHT system pressure recovered back to normal and ECCS was detached. The event is rated at level 0 on INES. Justification: The initiator in this event was "loss of reactor coolant system pressure control (high or low)" due to failure or inadvertent operation of an active component (e.g. feed, bleed, or relief valve)" which is an expected initiator. The safety system availability during the event was full. As per Table II (for incidents involving a real initiator) of User's manual the event is rated at level 0 on INES.
A vast subsea nuclear graveyard planned to hold Britain’s burgeoning piles of radioactive waste is set to become the biggest, longest-lasting and most expensive infrastructure project ever undertaken in the UK. The project [UK's nuclear waste dump] is now predicted to take more than 150yrs to complete with lifetime costs of £66bn in today’s money...The […]
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The French government has said it is "seriously" studying the option of building a plant to convert and enrich reprocessed uranium to cut its reliance on Russia following the invasion of Ukraine. The only plant in the world that currently converts reprocessed uranium for use in nuclear power plants is in Russia. "The option of […]
