ML20211L076
| ML20211L076 | |
| Person / Time | |
|---|---|
| Issue date: | 07/05/1989 |
| From: | NRC |
| To: | |
| Shared Package | |
| ML20211L061 | List: |
| References | |
| SSD, NUDOCS 9710100098 | |
| Download: ML20211L076 (3) | |
Text
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4 REGISTRY OF RADIDACTIVE SEALED SOURCES AND DEVICES SAFETY EVALVATION OF DEVICE (Corrected Page)
JUL 0 51989 NO.:
NR192D107U DATE:
February 09, 1968 PAGE 1 0F 3 DEVICE TYPE:
Fill-Level Gauge Source Holder MCDEL:
35-0201 through 35-0208 MANUFACTURER / DISTRIBUTOR:
Brun Corporation Columbus, OH MANUFACTURER / DISTRIBUTOR:
SEALED SOURCE MODEL DESIGNATION:
Nuclear Chicago 850233 AECL C-168
,O ISOTOPE:
Cesium-137 MAXIMUM ACTIVITY:
250 millicuries "
Cobalt-60 15 millicuries i
LEAK TEST FREQUENCY:
6 months PRINCIPAL USE:
(D) camma cause CUSTOM DEVICE:
YES X NO 9710100098 970929 PDR RC SSD PDR Ol9 /h i
1 4
REGISTRY OF RADI0 ACTIVE SEALED SOURCES AND DEVICES SAFETY EVALVATION OF DEVICE NO.: NR192D107U DATE:
February 9,1968 PAGE 2 0F 3 OEVICE TYPE:.
Fill-level Gauge Source Holder DESCRIPTION:
The outer physical characteristics of these devices are those of a closed steel cylinder 6 inches in height and 5-1/2 inches in diameter, mounted with its-longest axis vertical on a 1/4 inch thick steel bottom plate.
The bottom plate is attached to the cylinder with eight screws.
The 1/4 inch thick steel top plate is-welded to the cylinder which has a wall thickness of 7/32 inch.
A-mounting bracket may be welded to the cylinder wall; or mounting may be accomplished through the use of an oversize bottom plate with mounting holes.
Each of the units is designed to be watertight.
The only significant differences between the units are in the mounting brackets and electrical conduit entrances which are attached to the bottom and sides of the units. The radiation beam ports are fan shaped and are 1/4 inch wide. The port angle (measured downward from the horizontal at the top of the source) is about 30".
The source of radiation is mounted at the approximate center of a cylindrical shield. consisting of a hollow lead cylinder, 31/32 inch thick, surrounding two
- Hallory-1000 cylindrical shields' fitted together one on top of the other.
The lower shield section includes the beam port and suitable machined openings for
- the mounting of the Hallory-1000 source rotor.
The source at the edge of the rotor is moved 45 degrees, in a horizontal plane, between the "on" and "off"
- positions by the application of power to the rotary solenoid mounted at the bottom of the shield assembly and coupled to the rotor.
The solenoid acts against a return spring which returns the source to the shielced position when power is interrupted.
Internally mounted microswitches indicate the position of the source rotor as "on" or "off" by parallel wired, dual, red and green lights at the control console.
LABELING:
- A metal. label 3-1/2 inches by 2-1/2 inches attachsd to the outside of the device bears the radiation symbol and, typically:
" CAUTION:- RADI0 ACTIVE NATERIAL Cobalt-60 5 mc Model: =35-0201 BRUN CORPORATION Removal-of label is Prohibited"
REGISTRY OF RADI0 ACTIVE SEALED SOURCES At'0 DEVICES SAFETY EVALVATION OF DEVICE g
NO. :
NR192D1070 DATE:
February 9, 1968 PAGE 3 0F 3
/
DEVICE TYPE:
Fill-Level Gauge Source HolCer
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LABELING (CONT'D):
The label is basically yellow in color with black lettering and a magenta radiation symbol.
it is mounted over a " lock bolt" that secures the outer case r
to the lower shield, i
EXTERNAL RADIATION LEVELS:
In accessible areas at one foot from t.:e surface of the devices cre 1 mr/hr or less with a 250 millicurie, cesiu-13/ or a 5 millicurie cobalt-60 source in the "off" position.
Radiation levels for higher activites may be derived by extrapolation.
LlHITATIONS AND/0R OTHER CONSIDERATIONS OF USE:
The devices were evaluated on the basis that they will be mounted at the side of a steel mold thereby preventing access to the beam of radiation.
If other applications are proposed, an evaluation of radiation levels in the forward direction will be necessary.
The user is instructed by the Brun Corporation to avoid tampering with the device containir.g the source.
The Brun Corporation states that a service contract will norully be sold with each device to include visits at six month ic+.ervals by a Brun Corporation representative for the purpose of inspecting the devices and performing source leak tests.
The Brun Corporation has also suted that they will install and relocate the source holders and perform radiation surveys at the time of installation.
Since an "on-off" indicator is not located at the source shield and since the control console may be reciote from the shield, consideration must be given to exposure -* persons not aware of the exposed position of the source.
ISSUING AGENCY:
U.S. Nuclear Regulatory Conmission
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