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102:, cooling agent and radiation shield. The layer of water directly above the reactor core shields the radiation so completely that operators may work above the reactor safely. This design has two major advantages: the reactor is easily accessible and the whole primary cooling system,
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Various stations for holding items to be irradiated are located inside the core or directly adjacent to the core. Samples may be lowered into the core from above or delivered pneumatically via horizontal tubes from outside the tank at core level. Evacuated, or
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reactor, are rectangular instead of cylindrical and often contain as much as 416,000 litres (110,000 gallons) of water. Most pools are built above floor level but some are completely or partially below ground. Ordinary (light)
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issues. However most often 19.75% enrichment is used, falling just under the 20% level that would make it highly enriched. Fuel elements may be plates or rods with 8.5% to 45%
135:-only types exist as well as so-called "tank in pool" designs that use heavy water moderation in a small tank situated in a larger light water pool for cooling.
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are sometimes located around the facility to rescue personnel that may fall into the pool, further adding to the appearance of a swimming pool-like environment.
158:. Highly enriched uranium (HEU) was the fuel of choice since it had a longer lifetime, but these have been largely phased out of non-military reactors to avoid
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Open pools range in height from 6m to 9m (20' to 30') and diameter from 1.8m to 3.6m (6' to 12'). Some pools, like the one at the
Canadian
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filled horizontal tubes may also be installed to direct a beam of neutrons to targets situated at a distance from the reactor hall.
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blocks or plates may be added to the core as neutron reflectors and neutron absorbing rods pierce the core for control.
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for the majority of these types of reactors around the world. Core cooling is accomplished either by
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the pool water, is under normal pressure. This avoids the high temperatures and great pressures of
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and for training, and in rare instances for processing heat but not for electrical generation.
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are of the pool type. These tend to be low power, low maintenance designs. For example
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induced by the hot core or in larger reactors by forced coolant flow and
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296:Spinrad, Bernard; Marcum, Wade (5 September 2019).
226:is licensed to run unattended for up to 18 hours.
48:with 4% enriched, pin-type fuel consisting of
95:) immersed in an open pool usually of water.
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142:Normally the reactor is charged with low
91:(consisting of the fuel elements and the
274:Ageron, P.; Denielou, G. (1 July 1966),
110:. Pool reactors are used as a source of
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146:(LEU) fuel consisting of less than 20%
44:'s PULSTAR Reactor is a 1 MW pool-type
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276:SWIMMING-POOL NUCLEAR REACTOR.
150:alloyed with a matrix such as
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278:, U.S. Department of Energy,
228:Boron neutron capture therapy
71:'s Pulstar Nuclear Reactor.
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240:Pressurized water reactor
230:is another, medical use.
186:reactor fuel elements in
27:Not to be confused with
34:Type of nuclear reactor
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77:swimming pool reactor
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108:nuclear power plants
67:The control room of
298:"Research reactors"
98:The water acts as
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216:research reactors
100:neutron moderator
81:open pool reactor
79:, also called an
18:Open pool reactor
16:(Redirected from
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329:Nuclear reactors
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144:enriched uranium
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176:General Atomics
137:Life preservers
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85:nuclear reactor
83:, is a type of
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29:pool type LMFBR
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305:. Retrieved
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210:Applications
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180:La Jolla, CA
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93:control rods
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133:heavy water
118:Description
87:that has a
55:pellets in
307:8 November
261:References
192:convection
168:Beryllium
156:zirconium
152:aluminium
59:cladding.
323:Category
234:See also
224:SLOWPOKE
172:graphite
112:neutrons
69:NC State
57:zircaloy
42:NC State
284:4458849
164:uranium
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204:helium
188:France
131:- and
255:TRIGA
214:Most
184:TRIGA
148:U-235
129:water
124:MAPLE
309:2019
280:OSTI
220:AECL
170:and
104:i.e.
89:core
250:NRX
222:'s
178:of
154:or
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75:A
50:UO
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52:2
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