Hot water spillage at KNPP not due to design deficiency : AERB
The Atomic Energy Regulatory Board (AERB) today said the recent hot water spillage incident at the Kudankulam Nuclear Power Plant (KNPP) Unit 1, in which six workers were injured, occurred during maintenance of a three-way hot water inlet valve and there was no design deficiency in the plant.
The AERB which reviewed the May 14 incident, concluded that the incident leading to hot water burn injuries to three NPCIL workers and three contract workers was during maintenance of a 3-way hot water inlet valve to a heater loop in the turbine building of the Unit 1 (which was under shutdown during the maintenance period) due to trapped hot water release.
This was due to inadequate draining of hot water before taking up the routine maintenance work on the valve and there was no design deficiency, the AERB said.
Six workers were injured at KNPP Unit-1 on Wednesday when hot water spilled on them while they were carrying out maintenance work.
KNPP officials denied reports about any boiler having burst in the Unit and said the reactor was functioning properly.
An official spokesman here said preliminary investigation revealed that hot hold up water spread over the persons during dismantling of the valve of 500 mm size leading to the burn injuries.
''This was due to inadequate draining of the hot water before taking up the routine maintenance work on the valve. It is also concluded that there was no design deficiency with respect to the construction of the said valve,'' it said.
The injured persons having first degree burn injuries are presently undergoing treatment at hospitals.
(Posted on 21-05-2014)