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Topic: Loss of coolant

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	Loss of coolant - Wikipedia, the free encyclopedia
		If this coolant is lost, the nuclear reactor may continue to generate the same heat while its temperature rises to the point of damaging the reactor.
		Modern reactors are designed to prevent and withstand loss of coolant using various techniques.
		Some, such as the pebble bed reactor, passively shut down the chain reaction when coolant is lost; others have extensive safety systems to shut down the chain reaction.
	en.wikipedia.org /wiki/Loss_of_coolant (656 words)

	Coolant
		Actual transfer of heat from the coolant to air is determined by the residence time of the coolant in the heat exchanger as well as the volume and temperature of the air flowing through the exchanger.
		The engine rpm controls the coolant pump, so when the thermostat is fully open the engine rpm is controlling the residence time in the heat exchanger.
		Loss of coolant reduces the total heat capacity of the cooling system resulting in higher operating temperatures and the risk of further boilovers.
	www.srcinc.net /html/coolant.html (651 words)

	System for mitigating the effects of an accident at a nuclear power plant - Patent 4056436
		Since in the event of an accident involving loss of coolant considerable quantities of vapor are produced, large-volume containments are required which are strong enough to withstand the action of a high-temperature and high-pressure vapor-air mixture.
		In the case of an accident involving loss of coolant, the vapor produced as a result of boiling of the coolant mixes with the air with which the first chamber was filled prior to the accident, and the pressure in the first chamber rises to become higher than in the second chamber.
		The coolant is fed into the condenser 19 through the pipelines 20 by means of the pump 21 first from the tank 22 then, after the tank 22 is exhausted, through the heat exchanger 24 and ion-exchange filter 25 from the pits 23 in the container 2.
	www.freepatentsonline.com /4056436.html (2850 words)

	AAA : Your Car : Engine Coolant (Site not responding. Last check: 2007-10-08)
		When you check the engine coolant in your car, you are looking for the same two conditions that you look for with other fluid checks: the quantity of liquid in the system and its condition.
		The coolant tank is connected to the radiator filler neck by a hose, which extends below the coolant level in the recovery tank.
		You can recognize these pressurized coolant tanks from warning decals on their outside surfaces and because the cap is not a simple plastic plug or twist-off cap.
	www.csaa.com /global/articledetail/0,1398,1004010302\|2029,00.html (1077 words)

	EPA: Federal Register: Risk-Informed Changes to Loss-of-Coolant Accident Technical Requirements
		If coolant is lost from the reactor coolant system and the event cannot be terminated (isolated) or the coolant is not restored by normally operating systems, it is considered an ``accident'' and then subject to mitigation and consideration of potential consequences.
		If the amount of coolant in the reactor is insufficient to provide cooling of the reactor fuel, the fuel would be damaged, resulting in loss of fuel integrity and release of radiation.
		While this is true, the dominant effect in terms of core cooling is loss of the fluid exiting from the hot leg side of the break, with much less effect due to fluid exiting from the pressurizer side.
	www.epa.gov /fedrgstr/EPA-IMPACT/2005/November/Day-07/i6090.htm (17334 words)

	Nuclear Accidents
		There is an "emergency core cooling system", which is supposed to flood the reactor with water in case of a loss of coolant.
		If coolant is lost and the emergency system does not work, there can be a meltdown, which means that a large mass of fuel and other radioactive matter melts its way through the floor of the reactor, and, since it is very hot, melts down into the earth.
		All of the nuclear accidents that have occurred have been at least partially caused by loss of coolant.
	academic.brooklyn.cuny.edu /physics/sobel/Nucphys/acc.html (672 words)

	Automotive and Heavy-Duty Engine Coolant Recycling by Filtration (Site not responding. Last check: 2007-10-08)
		Coolant recycling was found to have good potential as a means of waste reduction and to be economically viable.
		The goal of the engine coolant recycling study was to evaluate (a) the quality of the recycled coolant, (b) the waste reduction potential of the technology, and (c) the economic feasibility of the technology.
		After recycling, the boiling and freezing points of the coolant were brought as close to the standard as possible through the use of a hand-held refractomstar and alteration of the glycol to water ratio.
	es.epa.gov /techinfo/research/reduce/rrel451.html (1215 words)

	Coolant loss? - Chevelle Tech
		The coolant level in my recovery bottle is very slowly decreasing, I have to refill it every 3 or 4 months.
		The coolant is not vaporized specifically because of the size of the hole, but it seeps out slow enough that the heat of the radiator and airflow can evaporate most of it.
		If you have a leak, the coolant is evaporating, but the tracer dye is staying behind.
	www.chevelles.com /forums/showthread.php?t=64180 (485 words)

	Back Room: Loss of Coolant
		The rate of loss has suddenly increased during the last few weeks, to the point when the coolant light comes on, it now needs topping up about every 80 miles (the light will start to flash from this point).
		A cooling system pressure test will show up a serious head gasket failure, but a minor leak which may be enough for the loss of coolant you describe is best identified by a chemical analysis of the gasses present in the cooling system, known as a "block test".
		So I thought it was a coolant into piston (or vice versa) leak which the block test should have spotted, also no oil in water/water in oil.
	www.honestjohn.co.uk /forum/post/index.htm?t=1781 (764 words)

	Evans Cooling Systems, Inc. High Performance Engine Cooling and Power Production.
		The coolant base PG is so safe that it is rated “Generally Regarded As Safe (GRAS)” by the EPA, and it is not classified as a hazardous waste.
		The result is loss of power from detonation or component structural failure from pre-ignition in the form of piston damage, head gasket failure, and/or warped or cracked heads.
		By bathing the entire combustion chamber with coolant 100% of the time, metal temperatures are controlled to such an extent that critical levels of detonation and pre-ignition are never reached.
	www.evanscooling.com /html/home1.htm (1770 words)

	Coolant Loss
		There are several possibilities that can cause coolant loss, from inexpensive to very expensive.
		If coolant appears to be leaking inside the car, in either the passenger or driver's foot well, suspect the heater matrix.
		This may be the result of a faulty seal or a possible head gasket failure causing overheating and over-pressurisation of the cooling system itself.
	www.diyfixit.co.uk /motor/faultfinding/coolantloss/coolantloss.htm (296 words)

	Ford Foundation: Nuclear Power Issues and Choices - 410
		Light-water reactor (lwr): A nuclear reactor that uses ordinary water as a coolant to transfer heat from the fissioning uranium to a steam turbine and employs slightly enriched uranium-235 as fuel.
		Loss of coolant accident (loca): A reactor accident in which the primary coolant is lost from the reactor core.
		Loss of fluid test (loft): An experimental device, one-sixtieth the size of a commercial pressurized-water reactor, which will be used by ERDA to simulate loss of coolant accidents.
	www.fordfound.org /elibrary/documents/0335/413.cfm (538 words)

	Litt's Overheating Hypothesis
		I believe it possible that these gasses heat and pressurize the coolant and possibly fill it with small gas bubbles, all of which reduces the ability of the coolant to carry heat to the radiator.
		Exhaust gasses in the coolant are a documented cause of unexplained coolant loss at steady medium to high speed driving.
		Most overheats are caused by clogged radiators, low coolant levels, bad water pumps, inaccurate thermostats and the like, so a mechanic can successfully diagnose and fix over 90% of overheats without ever considering a broken head gasket.
	www.troubleshooters.com /tlitthypothesis.htm (2267 words)

	Oil and Water (Site not responding. Last check: 2007-10-08)
		The loss of coolant results from the fact that the cooling system in the Sierra donor uses a pressurised header tank and the S7 cooling system doesn’t.
		The original tank allows for coolant expansion and contraction and is connected to a ‘blind’ radiator with no pressurised cap.
		The overflow pipe from the radiator is connected to a small overflow tank, excess coolant is vented to here, with the vent pipe always below the water level in the header tank so that when the engine cools down and the coolant contracts, water is drawn back into the system.
	hometown.aol.com /sarandrews/wateroil.htm (1342 words)

	coolant loss in '92 - Club Lexus Forums
		never noticed on mine until i flushed my coolant and used the red toyota coolant, residue was building up on top of the recovery tank near the coolant level sensor.
		Hate to speculate, but my 2 sleeper suggestions would be the heater control valve and that o-ring and coolant line that run under the manifold.
		I once had a coolant leak from the "water seal plate," located on the bottom right side of the engine of my 91 LS400.
	www.clublexus.com /forums/showthread.php?p=2176010#post2176010 (535 words)

	[No title] (Site not responding. Last check: 2007-10-08)
		The amount of water that leaked from the reactor coolant system was not enough to empty the pressurizer, let alone uncover the irradiated fuel in the reactor core.
		4 RHR shutdown cooling is a process where water from the reactor coolant system, heated by the decay heat produced by the irradiated fuel in the reactor core, is pumped by the RHR pumps through an external component, called a heat exchanger, where it is cooled by water from the Delaware River.
		The sudden loss of inventory in the pressurizer (level drop from 26% to 14% in about five minutes according to the NRC PN) is indicative of a substantial leak rate.
	www.gsenet.org /library/11gsn/1998/gs81210-.htm (2556 words)

	Elusive Coolant Loss (Site not responding. Last check: 2007-10-08)
		If you're having to add about a pint of coolant to the reservoir every 2 to 4 weeks, as I was on my 533i, check the following.
		Look for telltale residue of dried coolant on the top and sides of the radiator around the auxiliary fan switches, the nipple for the overflow hose, and along the seams where the plastic sides and the aluminum radiator are crimped together.
		If it is the head gasket that is blown, do not continue driving the vehicle as the head can and will warp - increasing significantly the cost of the repair.
	pages.sbcglobal.net /gorf/bmwtips/maintcoolant.html (281 words)

	Coolant Loss When Using Heater - SaturnFans Forums
		Now, I notice that there is a puddle of coolant under the car after she sits for a while.
		There is NOT any coolant in the passenger compartment, so I think the heater core is OK. I've checked the hoses to the heater core, and there isn't any evidence of leakage there.
		This condition may be caused by a coolant leak at the intake manifold gasket.
	www.saturnfans.com /forums/showthread.php?p=948076#post948076 (1473 words)

	coolant loss - Car Forums and Automotive Chat
		Experiencing loss of coolant through resevoir overflow tube, only during highway driving (is fine at idle).
		11-26-2004, 03:41 AM It has something to do with the pressure being excessive in the coolant system, or it could be a bad radiator, thermostat stuck closed.
		One mechanic seems to think that I have a bad head gasket and exhaust gases are going in the coolant system.
	www.automotiveforums.com /t318529.html (317 words)

	Cooling:
		Coolant dripping or seeping from the base of the pump at the block indicates that the pump gasket needs replacing.
		One contacts the coolant in the cylinder head or thru the radiator, one is just a probe that extends thru the rad fins, and one (like mine) has a probe that gets inserted into the upper rad.
		Coolant has to be going somewhere and it is doing so at the rate of about a pint a week.
	www.vcoa.org /700-900-faq/Cooling.html (16210 words)

	ANS : Store : Electronic Articles
		This study concerns the development of an integrated calculation methodology with which to continually and consistently analyze the progression of an accident from the design-basis accident phase via core uncovery to the severe accident phase.
		The depletion rate of reactor coolant inventory was experimentally investigated after the safety injection failure during a large-break loss-of-coolant accident utilizing the Seoul National University Integral Test Facility (SNUF), which is scaled down to 1/6.4 in length and 1/178 in area from the APR1400 [Advanced Power Reactor 1400 MW(electric)].
		The experimental results showed that the core coolant inventory decreased five times faster before than after the extinction of sweepout in the reactor downcomer, which is induced by the incoming steam from the intact cold legs.
	www.ans.org /store/index.cgi?i=E120000-nt-149-2-200-216 (240 words)

	Coolant Loss (Site not responding. Last check: 2007-10-08)
		One of the easiest ways I have found to diagnosise this particular problem is to pressure test the cooling system with the exhaust manifold removed.
		Coolant may appear in the exhaust ports, just inside the manifold surface.
		Poor maintenance when newer and infrequent coolant changes are the cause.
	www.barneymc.com /toy_root/techneek/coolloss.htm (527 words)

	Baffled by coolant loss - SaturnFans Forums
		The low coolant light comes on after cold starting about once every 10 days (I drive the car typically 400 miles/week) and I have to top off the coolant resevoir.
		I changed the coolant and hoses about 6 weeks ago after this warning came on for what was then the second time since most of the hoses looked pretty worn.
		You might only be loosing coolant while you're driving at speed, which might explain why you don't seen any pools developing beneath the car when parked.
	www.saturnfans.com /forums/showthread.php?t=47785 (717 words)

	Slight loss of Coolant level in the expansion tank - DiscoWeb Message Boards
		Slight loss of Coolant level in the expansion tank
		And yes, 2" loss in coolant is something I'd be concerned with.
		The amounts were so little that the coolant was simply boiling off before it hit the ground.
	www.discoweb.org /forums/showthread.php?t=9176 (1506 words)

	Coolant Loss Opinions.... - V8 Dodge Dakota
		Took it in for coolant flush/fill and had atiny tear in thermostat gasket.
		My 99 was slowly leaking coolant from the t-stat housing because some mechanic didnt torque the bolts properly when I had them do the plenum pan replacement....can't get good help these days.
		The factory repair manual says coolant loss due to evaporation is normal.
	www.dodgedakotas.com /boards/v8/316.html (538 words)

	Mystery Coolant Loss - TDIClub Forums
		I refilled it with VW Coolant, but became aware of the wet spots under the passenger side of belly pan.
		Coolant migration is an electrical issue - not a coolant loss issue.
		If coolant were to start leaking from the sensor probes, the coolant would drip out of the weep hole.
	forums.tdiclub.com /showthread.php?p=1488356#post1488356 (500 words)

	Coolant Loss
		I had a similar gradual coolant leak in my car.
		It was leaving a few drops of coolant under the middle of the car
		coolant smell would come and go as the heater was used and the windows
	member.rivernet.com.au /btaylor/BMWText/technical/CoolantLoss.html (881 words)

	Conventional Fusion FAQ Glossary Part 12/26 (L)
		This is called Landau Damping, since the loss of energy tends to damp the wave.
		Liquid metal used as coolant in a system where significant magnetic fields exist, it behaves differently due to MHD effects; these cause pressure which resists fluid circulation, suppression of turbulence, and altered flow patterns compared to non-magnetic liquid metal systems.
		Because of the loss cone, the theoretical maximum particle confinement time of a magnetic mirror machine can be only a few times the particle collision time; this is generally seen as a showstopper for mirror-based fusion research.
	www.cs.uu.nl /wais/html/na-dir/fusion-faq/glossary/l.html (2238 words)

	re: <E36> 328i Coolant Loss (Site not responding. Last check: 2007-10-08)
		Sometime before 10k miles, the low coolant sensor tripped and would go out as the car warmed up and the reservoir filled back up.
		My >guess is that once the engine heats up, the coolant expands and the sensor >no longer senses a low level.
		I popped into a >BMW dealer which was conveniently located on my way home from a business >trip, and the service tech donated a little coolant (not bad since I didn't >buy the car there).
	www.digest.net /bmw/archive/v5/msg03705.html (388 words)

	93 VW Corrado V6 Mystery Coolant Loss (Site not responding. Last check: 2007-10-08)
		In the span of 2-3 days of driving, the coolant in the reservoir is completely empty.
		If the coolant is at the correct level and the cooling system is functioning correctly, there is no reason for the coolant to be forced out of the reservoir while driving.
		A failing head gasket will cause coolant to be consumed by the engine, exiting as white vapor via the tail pipe.
	www.vehicletip.com /cgi-bin/forum/gforum.cgi?post=397 (297 words)

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