ML19347A384
| ML19347A384 | |
| Person / Time | |
|---|---|
| Site: | University of Buffalo |
| Issue date: | 09/23/1963 |
| From: | NEW YORK, STATE UNIV. OF, BUFFALO, NY |
| To: | |
| References | |
| NUDOCS 8104080567 | |
| Download: ML19347A384 (11) | |
Text
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O gI - nRACTCR DUILDING l
A.
Conoral The shall housing the reactor is a concrete right cylinder, 70
.?eet in diameter, and 52 feet high. The walls are two-foot thick, reinforced concrete, while the roof is of four-inch thick, reinforced a
concrete, supported by concrete beams. The walls support the 10 x 2 g
ton, dual hook crane, mounted 41 feet above the neutron deck (first level). The walls and first level are laid on bed rock.
I This gas tight cylinder encloses the reactor and all necessary auxiliaries including the control console and facilities for hot I
materials storage. It is penetrated by two sets of personnel air locks and a truck entrance hatch, ventilation ducts, electrical conduit, and piping. The truck hatch is sealed with an inflatable gasket at all times the reactor is operating. The ventilation ducts are equipped with hydraulic dampers, and all electrical conduit is
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sealed with epoxy resin. The containment has been tested at 0.5 psi over pressure, thus it is capable of withstanding the pressure rise associated with the sudden release of 60 pounds of steam l
(74.5 megastatt-seconds).
The leakage from the cylinder has been measured to be less than 3
3 120 ft /hr., or 1.55 per cent of the contained volume (106,000 ft ),
l per day at a pressure of -0.018 psi. This is well below the five per cent leakage per day assumed at -0.018 psi for controlled release l
of activity as described in the Basards section. Pressure loss tests will be undertakan annually to evaluate the integrity of the l
building, and steps will be taken to asistata a leakage rate less than five per cent per day -0.018 psi.
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l The tsactor building is cir conditioned with about four changes per hour. The medical facility cavity, hot cell, hot chamistry laboratory, beam tubes, rabbit tubes, and thermal colusca are I
separately exhausted. The exhaust is passed through absolute filters and is discharged through a stack at about 167 feet above grade.
i Activity is monitored, and during normal operations is well below tolerance, considering dilutions described below. Building inlet and exhaust ducts are sealed within 1/2 sec. by hydraulically operated butterfly valves, which are designed to seal against 2 pai.
Two air lochs at two different levels connect a radiation laboratory to the contaitument cylinder. General offices, two particle accelerators, a machine shop, and laboratories are housed therein.
l The heating and ventilating, and waste systems of this ving are separate from those systems of the reactor building.
Emergency power is provided for lighting in passageways, stack blower, radiation instrumentation, and critical experimental
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instrumentation.
3.
Neutron Deck level Figure IX is a plan drawing of the neutron deck, or basement, of the Center. The p.taciple irradiation facilities are located at this level (besa tubes and thermal oolumn). The area around the tank is unobstructed to permit the setting up of experimental equipment.
Storage for radioactive experinsats is provided by sleeves buried in I
the building well. Outside the reactor building at this level are located the waste stosese tanks, and holdup tank for M 0 decay.
The laboratory wing oostains the primary heat enchanger, pump room and ventilating equipment.
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Camma Dech Level tiithin the reactor buildina, the gamma deck or ground floor level (Figure X) provides access to the hot cell and service area. There is also a hot chemistry laboratory, and two waru laboratories. A change room is located at this level next to the hot chemistry laboratory. A movable truck hatch is provided at the gamma level for access to the reactor building from the outside. A personnel air lock located at this level provides access to the reactor building from the offica and laboratory ving.
At this level in the labor. tory wing are located a two-Hav electron accelerator, and a 400 Kav proton accelerator, electronics repair sho?. countin6 room, health physics office / laboratory, and machine shop.
D.
Control Dech Level This is the first level above ground (Figure XI). Within the reactor building it is the operating level at the top elevation of the tanh. Renovable deck plates and ar open area provide access to the experimental facilities of the neutron deck. The crane is operated by means of a pendant control fram this floor.
There is a control bridge spanning the pool, carrying the control drives, monitoring chambers, etc. The control room is located at this level and has an unobstructed view of the control bridge. In addition, there are offices for the operating staff, and a largo warm laboratory.
l Outside the reactor building in the laboratory wing are lab-oratories, offices, change rooms, and conference room.
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Umsto Disposal Hot vaste from hot areas (hot cell drain, hot chemistry laboratory, service area drain and sinh) is collected in 250 gallon sampling tanks. Uarm wr.ste from all vara areas (gamma deck and control deck laboratories, chance area sinh, and truck door drain) is collected in 600 gallon samplin6 tanks. Provision is made for sampling the vaste, for chemical or other treatment as may be necessary, and for dischcrging to either the sanitary sewer or the 10,000 gallon vaste holding tenh.
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Ho liquid effluent of activity above tolerance will be discharged i
to the sanitary sewer. As necessary, the activity will be -=* rated and stored, together with contaminated equipment, glassware, etc.,
until disposal is practical. Disposal will be arranged at AEC approved burial grounds.
F.
Honitorinn of Air Discharma 1.
Einhteen-inch Duet Air eff1t sat is withdraum from the stack duct at a race of nine cfa throuCh a fixed filter. =*imums particulate monitor with a low level alert and high level alarm. These indications are l
presented at the point of monitoring, as well as in the reactor control rocu, where they astuate a follow meter, alert light, alarm licht, and ball. The activity level is also printed on a 12-point recorder as a permensat record of the disebarged activity. The 9
moattor is set to alarm at a grosa beta activity of 3 x 10 microcuries per milliliter. It is not anticipated that significant amounta of particulates will be celleeted here, staae all of the air i
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reaching this point hcs previously passed through cbsolute filters.
% main function of this monitor is to detect defective absolute a,
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Following the particulate monitor, the air passes through
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the gas monitoring essembly and bach to the stack duct. The output 1
of two detectors mounted in a 30 liter, shielded, stainless steel tank is fed to a racemeter with lou level alert and high level alarm.
l As was the case for the particulate monitor, indications and alarms are presented both at the point of oonitoring and in the reactor control room. Sensitivity of the gas monitor is 5 x 10-8,g,,,,,,g,,
J per milliliter of argon-41. It is set to alarm at 2 x 10-6,g,,,,
1 curies of argon-41 per milliliter of air.
A 3200 cfn blouer, capable of pulling eight inches of vatar static pressure, operates continuously at the base of the stack.
-b A static pressure of -0.018 psi is maintained in the exhaust duct by a controller operating a motor-driven damper on a by-pess duct.
Thus, some dilution of embeust gasses takes place at the base of the stach after sampling.
Uote: h alaru setting of the gas effluent monitor at 2 x 10-6 microcuries per milliliter is an arbitrary setting and equivalent to HPC for vorhers. If, through operationci experience, it is found that the normal crgon concentration in the stack duct is significantly less than the above value, and that alarms result from transient conditions, the alarm setting may be increcsed consistent with safe maximum ground level seneentrationa as determined in the above usaner.
From meteorological information sentained in this report. it is i
believed that this is a safe and reasonable approseh.
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y The gases are exhausted at 4000 feet per ninute c.t the H
top-of the 167 foot stach directly into the avhanat gases f coc the.
I sentral power. plant. The everage rete of release of gross power plant gasses is 121,000 cfc.
u Since the c.verage yearly wind speed is 16 aph, it is possible to calculcte for the alare set point of 2 x 10~0 uc/mi the average maximum concentration of argon-41 et ground level:
20 X max =
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Where X = maximum ground concentrat'.on in ulcrocuries/ meter.
I Q = radioactive release rate from stash in microcuries/second.
e = 2.710 T
A = 3.141
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i G = average vind speed = 16 aph = 7.15 meters /sesond.
h = stach height = 167 ft. = 50.C meters.
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2 x 2.C32 2.710 x 3.141 x 7.15 x 2.59 x 103 3.50 x 10-5 microcuries per mater.
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3.50 :: 10*Il uterocuries per cilliliter, a concentration
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e, less than HPC by a feetor of almost 1000 2.
General Buildina Air Duet:
i General ventilating air from the oostainment building passes through a bank of roughf,ng and absolute filters prior to being
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exhausted to the atmosphere at roof level. In the 36" dust, on the exhaust side of the filter bank, are installed two geiger probes, eennected in parallel to a eeunt rate meter with a law level alert t
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