Slowpoke reactor

We also thank Dr. J. A. Kuehner and his operations staff at the McMaster Tandem for their support and assistance for this project. We are grateful to the staff at the McMaster Reactor and the Toronto Slowpoke reactor for irradiating our Be test samples. 

Samples (156) were taken from 54 reference lithic pieces that represented five rock types. These samples were analyzed at the SLOWPOKE Reactor Facility of the University of Toronto. They were irradiated for 1 min at 2 kW, or for 1 or 2 min at 5 kW (depending on their radioactivity level in preliminary tests). Upon removal from the reactor, the samples, which weighed between 0.1 and 0.3 g, were left to decay for 18 min and were counted for 5 min with a Ge(Li) y-ray detector coupled to a multichannel analyzer. Trace element concentrations were calculated with the comparator method (7). The 15 elements examined were barium, titanium, sodium, aluminum, potassium, manganese, calcium, uranium, dysprosium, strontium, bromine, vanadium, chlorine, magnesium, and silicon. The first seven of these elements were the most useful in the differentiation of major rock types. 

The authors thank Cathy D Andrea and Debbie Ross for their undaunting assistance in this work. The study was partially funded by a grant from the SSHRC (Social Sciences and Humanities Research Council of Canada) and the analysis was made possible through an infrastructure grant to the SLOWPOKE Reactor Facility at the University of Toronto, Canada. 

SLOWPOKE Reactor Facility and the Department of Chemical Engineering, and Applied Chemistry, University of Toronto, Toronto, Canada, M5S IA4... 

Analysis of Major Elements. Major elements were determined quantitatively by neutron activation analysis at the University of Toronto SLOWPOKE reactor. This technique was chosen because the available sample size was small. Differential scanning calorimetry with a Perkin-Elmer DSC-1B was used to establish the plaster composition further and to investigate its thermal behavior. 

Faculty of Science, Cairo University, Giza, Egypt department of Chemical Engineering Applied Chemistry, and the SLOWPOKE Reactor Facility and the Department of Chemical Engineering and Applied Science, University of Toronto, Toronto, Ontario, Canada M5S 1A4 department of Chemistry, University of Virginia, Charlottesville, VA 22901... 

For the INAA procedure, dried samples (100-600 mg) were placed in polyethylene vials and irradiated for 1-3 min in the SLOWPOKE Reactor at the University of Toronto (flux of 1011 n cm-2 s"1). The P was measured with the 31P (n, a) 28Al reaction. To measure the actual concentration of P, the same samples were irradiated a few days later under identical conditions while wrapped in cadmium foil (14). This step allowed for a correction in samples for which there was significant Al contamination. Although the INAA procedure could provide a clear indication of soil contamination, the corrections were large whenever badly contaminated soils were encountered. If soil contamination was expected, the dried bone samples were analyzed by X-ray fluorescence. The analysis was performed with a wavelength dis-... 

Metropolitan Museum of Art, 419 Miami University, 265 National Center for Health Statistic, 465 New York University, 265 North Carolina State University, 429 Northern Arizona University, 125 Northwestern University, 381 Ohio State University, 451, 465 SLOWPOKE Reactor Facility, 21,113, 337 Smithsonian Institution, 57, 87,419 Texas A M University, 145 University of Auckland, 21 University of California at Berkeley, 381, 465... 

Figure 3 The Slowpoke reactor a view of the critical assembly and reactor container, lower section. (Reprinted with permission from Atomic Energy of Canada Limited (AECL) Research, Canada.)...

Two hundred and ninety drawn glass beads and fragments of varying colour, structure (flashed, cored and uncored), sizes, and shapes from site Asd/KglO were analyzed non-destructively using instrumental neutron activation analysis at the SLOWPOKE Reactor Facility of the University of Toronto. These beads had to be neutron-irradiated as little as possible in order to minimize the build-up of radioactivity from Sb (half-life 2.75 days) and from Sb (half-life 60.9 days) in the Sb-rich beads, so that they could be returned to their owners within a reasonable amount of time. 

Marty McGuire tends to a Slowpoke reactor in the pool facility at Tunney s Pasture in May 1971. Most of these small reactors were sold to universities where they were used far research and teaching purposes. 

Instrumentation SLOWPOKE NAA Research Reactor Application Provenience... 

To attempt to sort out some of these issues with sourcing native copper, Ron Hancock and colleagues at the SLOWPOKE nuclear reactor facility at the University of Toronto decided to use the multielement capability of neutron-activation analysis. They started with 43 samples from 19 collections of native copper and 23 samples of copper from archaeological contexts but which were believed to be reworked metal of European origin. Eive other samples of copper from artifacts from known contexts but of unknown source were also included. To maximize the possibility that the provenience postulate would be true, they included 27 elements in their analytical procedure and got useful data for 22 of them. They also analyzed 14 subsamples from the same specimen to assess within sample variation and three modem copper samples for comparison. 

It is the emphasis on accident prevention through inherent characteristics which permits both urban siting and remotely-monitored operation. They are not new concepts by themselves-both have been accepted for a number of years in Canada for the 20 kW SLOWPOKE-2 research reactors, on the basis of an inherent design ch2uacteristic because of the limited... 

V.G. Snell, F. Takats and K. Szivos, "The SLOWPOKE Licensing Model", Proc. of the post-SMIRT Seminar on Small and Medium-Sized Nuclear Reactors San Diego, California August, 1989 also in Nuclear Engineering and Design, Vol. 137, p. 191 (1992). 

B.M. Townes and J.W. Hilbom, The SLOWPOKE-2 Reactor with Low Enrichment Uranium Oxide Fuel, Atomic Energy of Canada Limited Report AECL-8840, 1985 June. 

Reactor vendors have achieved success with very small reactors, for example SLOWPOKE, TRIGA, PULSTAR and MAPLE-X, and with large power reactors, for example CANDU, PWR, and BWR. They have however failed to produce commercially viable small reactors (say in the 10 to 1000 MWth range). This is because the very small reactor technology is not amiable to... 

Early studies concluded that the nuclear heat transport systems of a small reactor could not operate significantly above atmospheric pressure, if all design requirements were to be satisfied. It was noted that all of the very small reactors currently available, and generally regarded as inherently safe (SLOWPOKE, TRIGA, MAPLE-X) are pool type reactors. 

Over a dozen reactor designs are known worldwide, most of which have originated in developing Member States. The economics of these reactors, however, can only be justified in remote regions isolated from a national grid. Only a few of the concepts have been constructed (e.g. AST-5(X) in Russia, HRS in China and SLOWPOKE in Canada). As a result there is only little operational experience. 

SLOWPOKE Energy System provided direct public experience with small communities (Sherbrooke, Quebec and the University of Saskatoon, in Saskatoon, Saskatchewan). At these sites AECL gained experience appropriate for the subject of this week s session, and experience that is relatively recent, 1989, compared to the siting experience for the large power reactors which took place a number of years ago. 

RCC sold its eighth Slowpoke research reactor to the Royal Military College in Kingston... 

SLOWPOKE could be mentioned as the reactor similar to the RUTA-70. 

Ionizing particles produced by SLOWPOKE-2, steady state half power operation at reactor midheight and at 32 cm from core center line... 

Silicate nano powder with 10% wL ratio was dispersed into the above epoxy adhesive with a mixing through mechanical stirrer, and then the adhesive lap joints of PBI to PBI was fabricated and cured at 25°C for 24 h and after curing, the joints were irradiated for 6,12, 24,48, and 60 h to SLOWPOKE-2 Nuclear Reactor with a dose rate of 37 kGy/h when the reactor is at steady state half power operation of 10 kW (thermal). 

Lap-shear tensile strength of the joint prepared with basic epoxy adhesive, nano silicate epoxy adhesive, and the nano silicate epoxy adhesive joint exposed to SLOWPOKE-2 nuclear reactor for 6 h... 

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