An oil rig drilling into a salt mine caused a technological disaster at Lake Peigneur in Louisiana in 1980. The drill punctured the roof of the mine, draining the freshwater lake into the hole and dissolving the salt deposits underground. The resulting whirlpool sucked in the rig, barges, and surrounding land. Over a decade later, the Chernobyl disaster in 1986 was the worst nuclear power plant accident in history when a failed safety test led to explosions and fires that released radioactive contamination across Europe.

1. TECHONOLOGICA
L DISASTER

2. LE(ME)
ACTIVITY WORK
MADE BY: KRISHNARAJ MISHRA(ME038)
MANOJ CHAUHAN(ME037)
HARSH MISTRY(ME029)
RAHUL PAL

3. WHAT IS TECHNOLOGICAL
DISASTER?
 A technological disaster is an event caused by
a malfunction of a technological structure
and/or some human error in controlling or
handling the technology. The effects of
a disaster on families and individuals may be
long lasting and can endure for years.

4.  Disasters caused by technology involve
the failure or breakdown of systems,
equipment and engineering standards
that harms people and the environment.
 The term itself includes a wide range of
modern issues and consequences of
technology mismanagement and
engineering mistakes.
 Technology disasters include structural
collapses, such as bridges, mines and
buildings, but also industrial accidents,
such as chemical or nuclear explosions.

5. LAKE PEIGNEUR

6.  Lake Peigneur is located in the US state
of Louisiana, 1.2 miles (1.9 km) north
of Delcambre and 9.1 miles (14.6 km) west
of New Iberia, near the northernmost tip
of Vermilion Bay.
 It was a 10-foot (3m) deep freshwater body
popular with sportsmen, until an unusual
man-made disaster on November 20, 1980
changed its structure and the surrounding
land.
LAKE PEIGNEUR

7.  On November 20, 1980, an oil rig contracted
by Texaco accidentally drilled into the Diamond
Crystal Salt Company salt mine under the lake.
 Because of an incorrect or misinterpreted coordinate
reference system the rig was positioned as if the
coordinates were in the Universal Transverse Mercator
coordinate system when, in actuality, they were
in transverse Mercator projection the 14-inch (36 cm)
drill bit entered the mine, starting a chain of events
which turned the lake from freshwater to salt water,
with a deep hole.
LAKE PEIGNEUR

8.  It is difficult to determine what occurred, as much
evidence was destroyed or washed away in the
ensuing maelstrom.
 One explanation is that a miscalculation by Texaco
about their location resulted in the drill puncturing the
roof of the third level of the mine. This created an
opening in the bottom of the lake.
 The lake then drained into the hole, expanding the size
of that hole as the soil and salt were washed into the
mine by the rushing water, filling the enormous
caverns that had been left by the removal of salt over
the years.
LAKE PEIGNEUR

9.  Although there were no injuries and no human lives
lost, three dogs were reported killed. All 55 employees
in the mine at the time of the accident were able to
escape thanks to well-planned and rehearsed
evacuation drills.
 While the crew of the drilling rig fled the platform
before it was sucked down into the new depths of the
lake, and Leonce Viator, Jr., a fisherman who was on
the lake at the time, was able to drive his small boat to
the shore and escape.
 Days after the disaster, once the water pressure
equalized, nine of the eleven sunken barges popped
out of the whirlpool and refloated on the lake's surface.
LAKE PEIGNEUR

10. LAKE PEIGNEUR

11. CHERNOBYL
DISASTER

12.  The Chernobyl disaster, also referred to as
the Chernobyl accident, was a catastrophic nuclear
accident.
 It occurred on 26 April 1986 in the No.4 light water
graphite moderated reactor at the Chernobyl Nuclear
Power Plant near Pripyat, in what was then part of
the Ukrainian Soviet Socialist Republic of the Soviet
Union (USSR).
CHERNOBYL DISASTER

13.  The event occurred during a late-night safety test
which simulated a station blackout power-failure
and in which safety systems were deliberately
turned off.
 A combination of inherent reactor design
flaws and the reactor operators arranging the
core in a manner contrary to the checklist for the
test, eventually resulted in uncontrolled reaction
conditions. Water flashed into steam generating
a destructive steam explosion and a subsequent
open-air graphite fire.
CHERNOBYL DISASTER

14.  This fire produced considerable updrafts for about
nine days. These lofted plumes of fission
products into the atmosphere.
 The estimated radioactive inventory that was
released during this very hot fire phase
approximately equalled in magnitude the airborne
fission products released in the initial destructive
explosion.
 Practically all of this radioactive material would
then go on to fall-out/precipitate onto much of the
surface of the western USSR and Europe.
CHERNOBYL DISASTER

15.  During the accident, blast effects caused 2
deaths within the facility, later 134 were hospitalized
with acute radiation symptoms, of which 28 firemen
and employees died in the days-to-months afterward
from the effects of acute radiation syndrome, in
addition, approximately 14 cancer deaths amongst this
group of initially hospitalized survivors was to follow
within the next ten years(1996).
 Whilst among the wider population, an excess of 15
childhood thyroid cancer deaths had been documented
as of 2011.It will take further time and investigative
funding to definitively determine the elevated relative
risk of cancer amongst both the surviving employees
and the population at large.
CHERNOBYL DISASTER

16. CHERNOBYL DISASTER

17. Thank
You……..