The operator of a Northland geothermal plant has denied
reports of an explosion and 30,000 litre gas leak this
Northern fire communication shift manager Nicole Bernard said
more than 30,000 litres of gas had leaked at the Ngawha
geothermal station in Kaikohe, causing an explosion just
"We received a call at 5.45 to an explosion at the power
station. When the Fire Service arrived they transmitted a
third alarm and stated that 30,000 litres of methane gas
[was] leaking on site."
However, Russell Shaw, chief executive of the station's
operator Top Energy, said the reports were false.
The site holds pentane, not methane gas.
"There's been a gas leak, there's been no explosion. We have
a safety valve on our pressure vessels.
"That safety valve operator sensed over-pressure and ...
about 5.30am this morning, the operator, who's the only
person on site, shut the station down and evacuated the
"He called the Fire Service who then did a controlled
re-entry on the site and to test to see if any gas had been
The Fire Service had been carrying out tests since 6am and
were due to leave the site by 7.30am, Mr Shaw said.
"They've found at this stage no release. The station holds
30,000 litres [of pentane gas] so if it had gone up in a big
puff of smoke than 30,000 would have been released, but at
this stage they've found nothing.
"That is the latest report that we've had from our plant
The safety valves had never gone off before and it was
unknown what had caused it to happen today, Mr Shaw said.
"At this stage we don't know and as a precautionary process,
because the gas is highly flammable, if we have a release, we
evacuate our operators from site and we go through this
process of a controlled re-entry."
Mr Shaw told TVNZ that the site was relatively close to the
Ngawha village settlement and the company would be working
with them to let them know what had happened.
Residents were not in any danger he said.
A full investigation would be carried out to determine why
the safety valve had gone off, he said.