High temperature, tests

R. A. Mercuri, R. A. Howard, and J. J. McGl meiy, Ndranced High Temperature Test Methodsfor Gasket Materials, Automotive Eng 97, 49—52 (July 1989). 

High Temperature Test Reactor, HTTR (Japan)... 

The HTTR is an experimental helium-cooled 30 MW(t) reactor. The HTTR is not designed for electrical power production, but its high temperature process heat capability makes it worthy of inclusion here. Construction started in March 1991 [47] and first criticality is expected in 1998 [48]. The prismatic graphite core of the HTTR is contained in a steel pressure vessel 13.3 m in height and 5.5 m in diameter. The reactor outlet coolant temperature is 850°C under normal rated operation and 950°C under high temperature test operation. The HTTR has a primary helium coolant loop with an intermediate helium-helium heat exchanger and a pressurized water cooler in parallel. The reactor is thus capable of providing... 

The furnace is a Marshall high-temperature testing furnacet (d), with nine zones. Shunt resistances are placed selectively across the winding of the furnace to establish a thermal gradient across the 4-in. length of the boat, with the V-shaped end of the boat at the cool end of the gradient. A Pt—Pt— 10%Rh thermocouple is used... 

After preparation of newly developed membranes, high temperature permeation measurements were performed by VITO in Belgium. Steam treatment and membrane material characterisation were performed at SINTEF in Norway and reactor testing together with kinetic modelling of the reactor at IRC in France. The development of a high temperature test module for this reactor testing was the task of Velterop BV in the Netherlands. 

CDF Chemical Agent Disposal Facility HTT high-temperature test... 

The second condition is a high-temperature test (HTT) using the same POHCs designated for the low-temperature test, plus ethylene glycol and 21 metal oxides to determine metal emissions. The third condition is an HTT using the pollution abatement system filtration system (PFS). Both HTT conditions use the same surrogates and additives, but additional metal oxides are fed in this third condition test to determine the metal removal efficiency of the PFS. 

Fitz Gerald, J. D., Chopra, P. N. (1982). Deformation mechanisms in dunite -the results of high temperature testing. In Strength of Metals and Alloys, edited by R. C. Gifkins, pp. 735-40. Oxford Pergamon Press. 

High-temperature test operation mode operation at reactor-outlet coolant temperature of 950°C. 

The high-temperature test operation w as conducted in order to achieve tlie rated thermal power of... 

Figure 4. Operation history during the high-temperature test operation by the single-loaded mode. Maximum reactor-outlet coolant temperature of 950°C had attained on 19 April 2004.

Tlie core-internal thermal-hydraulic performance of fuel temperature, core-internal structure, and core-internal coolant distribution were confirmed to be appropriate to their design during the full power operation. Tlie maximum temperature of the core support-plate measured at the upper surface of the centre core support-plate was 450°C that was sufficiently below its limited value of 530°C. Also, it was confirmed that other core-internal structure temperatures were well below their design criteria. From the result tliat no core-internal structure temperature measurement showed an abnormal value, it was confinned tliat there was no abnormal leak flow of coolant such as cross and bypass flows between fuel blocks, replaceable reflector blocks, permanent reflector blocks, etc. The maximum fuel temperature was evaluated to be 1 463°C prior to the high-temperature test operation. It was re-evaluated using the measured temperature data i.e. core-inlet and -outlet coolant temperatures and the calculated value of 1478°C does not exceed the normal operation hmit of 1 495°C. 

In other high-temperature tests, Ryton polyphenylene sulfide coatings on aluminum will pass an 80 inch-pound reverse impact test after exposure in air at 600°F for eight days, or at 700°F for two days (Table VIII). 

Fig. 12.5 Photograph of a typical membrane and the high temperature testing module...

High temperature tests 150°C/1000h, bias short exposure 260°C/10s... 

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