Steam System Emergencies Flashcards
Steam system emergencies.
Concrete slabs typically cover steam vaults with access manholes placed in ——?
Photo 1
Pairs
High Pressure Steam is what color? 2.1.
Invisible
The white mist seen is the condensation that forms when steam cools.
Steam pressures in generating plants can be as high as —- PSI with temperatures reach —— degrees Fahrenheit.
Steam pressures in the buried supply piping and in supplied buildings can be as high as —- psi and temperature is as high as —— degrees Fahrenheit. 2.2.
2000 psi 900 •F
170 psi. 350•F
High pressure steam does not drain, water slugs can be pushed through the piping by the steam at speed as high as? 3.1.
200 mph
Con ED workers refer to a steam pipe rupture as a?
3.1
HELB
High Energy Line Break
High energy line break in the street. Underground steam pipes are mostly commonly wrapped in —— insulation.
4.2
Asbestos
High energy line break in the street is a ——- incident. 4.2.
Haz Mat
T/F Asbestos has been removed from Con ED steam manholes and most underground piping. 4.2A
False
It has been removed from steam manholes but remains on most of the underground piping.
T/F High energy line breaks in the street. Asbestos can be drawn in structures by buildings vent system.
4.2 B
True
T/F
High energy line break in the street the pressure released is high enough to cause an intact street to collapse or explode inward as the high-pressure steam escapes from the rupture pipe. 4.2.
False
Explodes Outward
High energy line break in the street, escaping high-pressure steam can hurl debris at—— miles per hour, 4.2
200 mph
Water slugs are 200 also
T/F
High energy line break in the street. The noise of escaping steam will make radio and verbal communication ineffective in the vicinity of the release. 4.2 page 4.
False
IMMEDIATE Vicinity
High energy lime break in the street. Approach an outdoor HELB from. —— wind and stay clear of the vapor plume. 4.2 page 4.
Upwind
T/F
Isolate responders, civilians, and equipment in order to limit to spread of asbestos contamination. 4.2 page 4.
False
Isolate EXPOSED responders
T/F
Prevent occupants from exiting buildings into the exclusion zone. 4.2 page 4.
True
High energy line break. Consider evacuating civilians from the
—— or —— entrances to avoid the exclusion zone. 4.2 page 4.
Rear or sides
T/F High energy line Break. Prepare for Decon of civilians, firefighters, bunker gear, tools, equipment and vehicles. 4.2 page 4.
True
At a high energy line break. Consider shutting the HVAC systems of nearby buildings. 4.2 page 4.
True
Con ED may place vent stacks over minor steam leaks, to direct steam up over the roadway. If a vent pipe has a —— on top of it. This indicates the steam is the result of a water leak not a leaking steam main.
4.3 page 5.
Blue stripe
T/F High pressure steam risers can be found in the walls on all floors of supplied buildings. 4.4.
True
PS high-pressure steam pipes inside buildings are typically insulated with asbestos and a HELB in a building. will likely release asbestos inside the building.
T/F
Building supplied with steam will have a number of valves to control the system. Shut all steam valves inside the control room of the supplied building. 4.4 page 6.
False
Shutting the wrong valve can cause damage the system creating other hazardous conditions.
High energy line break, in an emergency members may shut the ———-. 4.4 page 6.
Inside service valve.
It will be labeled and sealed if possible wait for Con Ed STEAM personnel to shut the necessary valves.
T/F
Once a steam valve is shut, do not open it. The system will have to be drained before reopening the valve. 4.4 page 6 B.
True
PS notify Con Ed if a valve is shut
There is a building steam shut off located outside the building. FD members should not attempt to shut this valve. This valve should only be shut by Con Ed personnel. 4.4 page 6D.
True
What areas to the steam leak must be searched as steam can infiltrate these areas. 4.4 page 6.
Adjoining areas
At a high energy line break, it could be the result of a terrorist attack. What else shall be monitored?
5 page 6.
Monitor for radiation
At a high energy line break, the probable presence of Asbestos makes this a hazmat incident until proven otherwise by sampling and testing. Transmit radio signal —— with the appropriate code, specifying asbestos release.
5 page 7
10-80 with appropriate code
At a HELB FDNY SCBA policy is strictly enforced. The IC may consider using. ———-
5 page 7
APR’s
after consultant the hazmat group supervisor and all risks have been properly evaluated.
