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UNIT NO. 2 REACTOR SCRAM ON PRM HIGH FLUX

On 31.7.92 at 1722 hrs unit no. 2 scrammed on PRM high flux. PSIV 2HSO/A was found in closed condition and other three PSIVs were in open condition.
On investigation, PSIV 2HSO/A air tubing (copper tube 3/4 inch size) upstairs of solenoids was found snapped off at the junction of air tubing and the main air supply line (3/4 inch size). This resulted in sudden closure of the valve due to loss of air and subsequent reactor scram on PRM high flux.

Location: TARAPUR-2
Event date: Fri, 31-07-1992
Nuclear event report
Legenda & explanation