ML20211K848
| ML20211K848 | |
| Person / Time | |
|---|---|
| Issue date: | 07/05/1989 |
| From: | NRC |
| To: | |
| Shared Package | |
| ML20211K806 | List: |
| References | |
| SSD, NUDOCS 9710100054 | |
| Download: ML20211K848 (3) | |
Text
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Mi p[- Q9(b;gogy REGISTilY Of RADIOACTIVE SEALED-SOURCES'AND DEVICES
' SAFETY EVALVATION OF DEVICE-(Corrected Page).
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OUlI0 5 19g9 NO. ::
NR192D1050-DATE:
tiay 27.1966-
,PAGE-I'0F 3-DEVICE TYPE:
Gauge Source Holder f100EL: 02-0123 NANUFACTURER/ DISTRIBUTOR:-
Brun Corporation Columbus, OH MANUFACTURER / DISTRIBUTOR:
SEALED SOURCE MODEL DESIGNATION:
Nuclear _ Chicago 850?33 J
ISC'E: Cesium-137 MAXIMUM ACTIVITY:
50 millicuries 4
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LEAK TEST'FRE00ENCY:
PRINCIPAL USE:- (D) camma cause t
CUSTOM OEVICE:
YES
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9710100054 970929 PDR RC i
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.c REGISTRYLOF RADI0 ACTIVE SEALED SOURCES AND DEVICES
= SAFETY-EVALUATION OF-DEVICE NO.:
NR1920105U DATE:-
May 27, 1966' PAGE 2 0F 3-
"DEVltE TYPE:
Gauge Source Holder DESCRIPTION:
The device-is cylindrical in sha.pe, 7-5/16 inches in height, and 4-1/2 inches in aiameter with a 4-3/4 inch square base plate.
The steel base plate, 1/4 of an.
inch thick,. includes 4 mounting holes 5/16 inch in diameter.
The steel cylinder i
has.a 1/8 inch wall and a top = plate 3/16 inen thick.
These components are joined-l by welds.
~
The cylinder is-filled with lead shielding, which includes two cavities.
A rectangular beam port,1-1/4 inches by 1-5/16 inches at the outer surface of the device, tapers to its apex at the approximate position of the source in the "on" position.- The other cavity consists of a vertical hole lined with 1/2 inch inside diameter steel tubing.-
This hole.is 5-1/4 inches deep and is located on the vertical axis of the cylinder.
The-source is mounted at the bottom end of a source rod which is raised a distance of 2-7/16 inches to expose the source at the apex of the beam port.
The bottom portion-of the source rod, 3/8 inch in diameter and 2-1/4 inches in length, consists of a Mallory-1000 meta).
This is threaded to the upper portion of:the source rod consisting.of a 1/4 inch square, steel piece topped by.a knob. A stop secured to the: top plate by two screws has a 17/64 inch square hole allowing passage of the 1/4 inch square portion of the rod only.
This prevents removal of the source and positions it at the apex of the bean port..
A pin is used to " lock" the source in either the "on" or "off" position. -The pin j
is inserted through a hole in the stop and a hole in the source rod. A cable passing through the locking pin and looped at each end may be padlocked in place so as to prevent movement of_the source.
LABELING:.;
A metal label =3-3/8 inches b'y 2-3/16 inches attached to the outside of the device.
- 180* :from the radiation ' beam _ bears the following:
" CAUTION:-'RADI0 ACTIVE MATERIAL Cesium-137J 50 mc-Date of Measurement
~ Model: 02-0123 BRUN CORPORATION, COLUMBUS, OHIO" r
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' REGISTRY OF RADI0 ACTIVE ~ SEALED' SOURCES AND DEVICES SAFETY EVALUATION 0F DEVICE'
' ' NO.:
NR1920105U DATE:
May 27, 1966 PAGE 3 0F 3
' DEVICE' TYPE:
Gauge Source Holder LABELING (CONT'0):
-The-label is-basically yellow in color with black lettering and a magenta 3
- radiationLsymbol.
A= label attached to the device, opposite the beam port, indicates the source position:as " SOURCE OPEN" and " SOURCE CLOSE" by arrows.
EXTERNAL RADIATION LEVELS:
The radiation-levels at one foot from the surface of the device containing 50 millicuries of cesium-137 are generally less than 1.5 mr/hr with a maximum of about 2-1/2 mr/hr at a inot from the top surface of the device.
This includes radiation levels for both +he "on" and "off" positions of the source.
I LIMITATIONS AND/0R OTHER CONSIDERATIONS OF USE:
The Brun Corporation has ststed that they will install, survey, and leak test each device.-.They have also indicated a willingness to provide maintenance and repair services _ including relocation.
The Brun Corporation has not described any guards or shielding inherent in the-device installation.- Therefore, each individual applicant's proposed use of the device will have:to be individually evaluated.
ISSUING AGENCY:
U.Si Nuclear Regulatory' Commission 4
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