Chennai:
Atomic Energy Regulatory Board (AERB) has said
the failure to drain out hot water before undertaking maintenance work on
valves in Unit-I of Kudankulam Nuclear Power Plant resulted in the mishap in
which six were injured last week.
Stating that there was no design deficiency in
the construction of the valve, AERB said that preliminary investigations into
the incident revealed that hot hold up water spread over the persons during
dismantling of the valve of 500 mm size.
“This was due to inadequate draining of the
hot water before taking up the routine maintenance work on the valve,” AERB
said in a release.
The statement from ARB comes after it reviewed
the recent hot water spillage incident at Kudankulam Nuclear Power Plant
(KKNPP) Unit – 1 which occurred on May 14, 2014.
The release stated that based on the
investigations of AERB at site as well as review by a high level committee of
AERB, it is concluded that the incident of the hot water spillage leading to
the hot water burn injuries to three of NPCIL workers and three contract
workers was during maintenance of a three-way hot water inlet valve to a heater
loop in the turbine building of Koodankulam Unit 1 (which was under shutdown
during the maintenance period) due to trapped hot water release.
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