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Reactivity control was provided by four semaphore signal–type control blades held by magnetic clutches to shafts that could be driven by geared electric motors. The blades were made of cadmium plates riveted to aluminium blades. The insertion of a single blade was sufficient to shut down the fission
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The concrete shielding was penetrated by a number of holes enabling neutron beams to be obtained for the purpose of irradiating samples and several pipes that enabled samples in sample carriers to be inserted into the reactor and subsequently removed to the adjoining radiochemical laboratory for
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The heat generated by fission was carried away by the cooling water and disposed of outside the facility by means of a forced-draft cooling radiator. Due to the small size of the core and low burn up of the fuel, the disposal of fission product heating was not an issue.
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The fuel elements were situated within six open-topped aluminium tanks containing water that were separated and surrounded by graphite. This meant that moderation was part by the water within the tanks and part by graphite - with graphite serving as the reflector.
81:. Power failure also produced an immediate scram as the magnetic clutches on the control blades would disengage, certain control instrumentation had battery back up support.
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A study was undertaken (around 1980) to investigate increasing the power to 1 MW thermal; however, this was deemed to be too difficult and the plans were abandoned.
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metal fuel clad in aluminium. The fuel elements consisted of bundles of flat plates rather than rods. The core was cooled by light water.
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E., HUMPHREYS; K., RIDING (1994). "Stages 1&2 Decommissioning of the
Universities Research Reactor(URR), Risley".
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In later years the reactor was rated at 300 kW thermal however originally the output was 100 kW thermal.
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The simple control system did not use voting logic. Any detected fault resulted in an immediate
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Decommissioning work began in 1992 and was finished in 2006. The reactor fuel being
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The construction works started in 1962 and went critical on 7 July 1964.
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316:Nuclear research institutes in the United Kingdom
133:"Nuclear physics at the University of Manchester"
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301:Buildings at the University of Manchester
296:Buildings and structures in Warrington
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46:universities and used for performing
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306:Former nuclear research institutes
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21:Universities' Research Reactor
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17:Universities Research Reactor
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159:"BNFL decommissioning note"
25:University Research Reactor
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321:Nuclear research reactors
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62:The reactor used highly
32:nuclear research reactor
331:University of Liverpool
291:Argonaut class reactor
311:History of Warrington
192:Electronics and Power
267:53.42722°N 2.53139°W
204:10.1049/ep.1964.0359
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171:on 10 November 2006
272:53.42722; -2.53139
50:work and training
48:neutron activation
36:Risley, Warrington
52:reactor operators
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164:. Archived from
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64:enriched uranium
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173:. Retrieved
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113:reprocessed
285:Categories
255:53°25′38″N
119:References
93:Operations
40:Manchester
258:2°31′53″W
239:0262-5091
212:0013-5127
44:Liverpool
175:4 March
143:4 March
89:study.
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58:Design
169:(PDF)
162:(PDF)
79:scram
235:ISSN
208:ISSN
177:2008
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