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EIA supporting renewal of OL. · 2.0 Environmental Effects of Site Preparation {and Facility Construction ..... 5 3.0 Environmental Effects of Facility ... The biological shield surrounding
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The MUTR is a pool-type, light water cooled and re-
flected TRIGA-fueled reactor licensed for 250 kilowatt
steady-state operation. The core it on the bottom of an
aluminum tank which is 7 feet in diameter by 21 feet in
height. The biological shield surrounding the core consists
of ordinary concrete and 6000 gallons of demineralized ~~~-~~~
water. The core is shielded by approximately 17.5 feet
of water on the top and by 2 feet of water and 7 feet of
concrete on the sides. The water system, which includes
heat exchangers, filters, demineralizers, and a circulation
pump, is used for cooling and purification.
The reactor is housed in a building connected to the
Chemical and Nuclear Engineering Building, which is located
on the northern edge of the main campus at College Park,
Prince George's County, Maryland.
1.2 Building
IThe reactor is housed in a building connected to the
Chemical and Nuclear Engineering Building. The reactor
building is 50 feet long, 46 feet wide, and 26 feet high,
with a center bay 37 feet high and 20 feet long. There are
no exterior conduits, pipelines, electrical or mechanical
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Istructures, or transmission lines attached to the nuclear
reactor facility other than utility service facilities
which are similar to those required in other campus
facilities.
1.3 Cooling, Make-up Water and Clean-up Systems
The reactor tank contains 6000 galluns of light water
used for moderation, shielding and cooling. Since the core
transfers 250 kW of thermal energy tcI the coolant, the
heat must be removed from the coolant d'uring prolonged
operation of the reactor at full power. Two heat exchangers
with a combined heat removal capacity of 240 kW are used to
transfer heat from the primary coolant to the secondary
coolant. The f acility uses city water as the secondary
coolant which is released to the sewer system af ter it
passes through the heat exchangers.
Make-up water for the pool is obtained from the city
water supply. To prevent irradiation of mineral'- and im-
purities existing in ordinary tap water, the water is
filtered and demineralized before it is pumped into the pool.,
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To keep the pool water free from dust and ions that
gradually accumulate, the water is circulated through a
clean-up system before it passes through the heat exchangers.|
The clean-up system consists of a large micro filter and an
ion exchanger.
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1.4 Ventilation System{
( The reactor building has two roof mounted ventilating
exhaust fans and two motor-operated louvers for intake of
air. The fans and louvers can be controlled from the
console and from various locations in the building. Each
of the main exhaust fans is capable of handling 6000 cfm
[ 3of air. The volume of the reactor building is 97300 feet ,
Two air conditioners in the exterior west balcony lab wall- ~
and two air ' ports' at ground ~ level' in the ' west wall provide--~~~~~ ~
exterior air. Air from the west balcony labs exhausts
into the main reactor area through two one-way motorized
[ louvers. CO fr m the pneumatic transfer system exhausts2
into the main reactor bay area just below the ventilatingexhaust fancs. A radiation detector monitors the air beforeit is exhausted through the fan mounted on the west
penthouse wall. The building ventilation system turns off
{ automatically when any area monitor reading exceeds a presetlimit.
1.5 Liquid Waste Storage
{ All liquid waste water that ends up in the sump and
holdup tank will be considered and treated as low level
[ '
wastes. The holdup tank is located in an excavation in the
water handling room called the sump. The sump and holdup
tank have a total capacity of 1200 gallons. The system
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contains a sump pump that pumps the water from the sump to
the sewer, and a circulation pump that can be used to
circulate water in the holdup tank through filters.
There are several ducts leading to the sump holdup
tank system. The grill work around the base of the reactor
and two sinks located on the west balcony laboratories
drain directly into the sump. The pool overflow drains
into the holdup tank which can be drained into the sump.
Level indicator instrumentation is provided for the