ML20211K795
| ML20211K795 | |
| Person / Time | |
|---|---|
| Issue date: | 07/05/1989 |
| From: | NRC |
| To: | |
| Shared Package | |
| ML20211K754 | List: |
| References | |
| SSD, NUDOCS 9710100041 | |
| Download: ML20211K795 (4) | |
Text
[hl[j$7% DTOY Sl REGISTRY OF-RADIOACTIVE! SEALED SOURCES.ANDl DEVICES-SAFETY EVALUATION OF CEVICE-(Corrected-Page)-
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NR1920104U:
DATE:
. December 17 1965 PAGE l 0F 4 -
i DEVICE. TYPE:
Fill-level Gauge Source. Holder-MODEL::.02-0009_-ML-1', NL-1-4 l MANUFACTURER / DISTRIBUTOR:
Brun Corporation Columbus, OH-MANUFACTURER / DISTR.!BUTOR:
SEALED SOURCE MODEL DESIGNATION:. -AECL'C-164 AECL~C-168 2 ISOTOPE: Cobalt-60
- MAXIM!"4 = ACTIVITY:
100 millicuries
. LEAK' TEST' FREQUENCY:
6 '. months
-PRINCIPAliUSE:- (D):ca ma cauge-fCUSTOM DEVICE:
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T-a REGISTRY OF RADid' ACTIVE SEALED' SOURCES AND DEVICES SAFETY EVALUATION:0F DEVICE:
NO.:. NR192D104U~
'DATE:
- December 17, 1965 PAGE 2 0F 4-i LDEVICE TYPE:
Fill-Level Gauge Sourcej Holder-r 40ESCRIPTION:-
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>The; outer physical characteristics of the ML-1-4 are those. of a steel cylinder.
E 9-1/8 inches-in height byLand 7-3/4-inches in diameter: mounted with its longest-axisivertical on a 3/8 inch: thick steel base plate. _The base plate, twhich: includes an electrical cable connector, is attached to the' cylinder with "eight' screws. The 1/411nch thick steel top plate is welded to the cylinder.
- Mounting bracketsLare welded ' the side or bottom of the' device.
The source of radiation is. mounted at the approximate center of an. inner cylindrical shield-consisting of an assembly of two Mallory-1000 cylindrical
- shields.- These shields, a rotary solenoid and an outer cylindrical lead shield are contained within an inner steel can with the -lead shield resting on the base plate. Anl outer shield of lead surrounds this inner assembly at the top and
-sides.
-. _ ~ A. rotary solenoid mounted at the bottom of the Mallory-1000 shield assembly has its rotor coupled to a Mallory-1000 rotor.
The source, at the edge of the rotor,
^1s moved;45 degrees between the "on" and "off" positions. The application of power to the solenoid causes the rotor to act against a-return spring which returns-the source to the shielded position when the power is interrupted.
19 thel"on" position, the source is exposed through a rectangular beam port 1-7/8 inches _in. height'and 1/2 inch--in width.
Internallymountedmicroswitchesindicatecthe-positionofthesourcerotohas "on" or "off" by parallel wired, dual, red and green lights at the control 1
console.-
LABELING:
. A metal: label,3-3/8 -inches by 2-3/16 inches, attached to the outside of the
. device'90' from-the radiation: beam, bears the following:
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REGISTRYiOFERAD10 ACTIVE: SEALED-SOURCES AND DEVICES SAFETY EVALUATION.OF DEVICE j-
.NR 920104UT DATE:
December 17, 1965 PAGE 3 0F'4 1
NO. ::
DEVICE TYPE::
Fill-Level Gauge Source Holder LABELING (CONT'D)::
" CAUTION:
R,'10 ACTIVE MATERIAL Cobalt me-Date of Measurement Model No. ML-1-4 BRUN CORPORATION,-COLUMBUS, OHIO" 4
1The-label is basically yellowLin color with black lettering and a magenta rodiationisymbol.
EXTERNAL' RADIATION-LEVELS:.
In; accessible-areas at one foot from the surface-of-the ML-1-4 are 3.2 mr/hr or less with a 53 millicurie cobalt-60 source in the'"off" position.
A radiation level:of 9.5 mr/hr exists over a small area in the region of the beam port which is inaccessitle when the unit is installed.
LIMITATIONS AND/0R OTHER CONSIDERATIONS OF USE:
The ML-1-4-device was evaluated on the basin that it will be mounted flush-to the Iside_of a steel mold thereby preventing access to the beam'of radiation and reducing radiation levels.in the forward direction to-about 0.1 mr/hr.
If other
. applications are proposed, an evaluation of radiation levels in the forward direction will:be necessary.
.The userf s instructed by:.the Brun Corporation to avoid tampering with.the. device-i
. containi ng" the - cobal t-60 -. sou rce. The Brun Corporation states that a service contract will normally be sold.with.each-ML-1-4 to include six month visits byla
~ Brun. Corporation, representative for the _ purpose of_ inspecting the device and Lperforming source leak-tests.
The'Brun; Corporation has also stated that they will install and relocate the
- source holderstand, perform radiation surveys at the-time of installation.
Since an "on-off" indicator:is not located at the sourceishield and since the Leontrolf console may be remote from the shield, consideration must be giv'en to
' exposure oEpersons;not aware of the exposed position of the source.
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6 REGISTRY OF RAD 10 ACTIVE' SEALED SOURCES AND DEVICES SAFETY EVALVATION OF DEVICE NO.:. NR192D104U.
DATE:
December 17, 1965 PAGE 4 0F 4 4
DEVICE TYPE:
Fill-LevelfGauge Source Holder
REFERENCES:
Amended February 23, 1966 ISSulNG AGENCY:
U.S. - Nuclear Regulatory Commission 4
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