ML20211L355

Corrected Registry of Radioactive Sealed Sources & Devices Safety Evaluation of Device fill-level Gauge Source Holder for Models 02-0036-ML-1,ML-1-5.Certificate:NR-192-D-103-U

ML20211L355
Person / Time
Issue date:	07/05/1989
From:	NRC
To:
Shared Package
ML20211L320	List: ML20211L313 ML20211L355
References
SSD, NUDOCS 9710100167
Download: ML20211L355 (4)

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• REGISTRY OF RADIDACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF DEVICE (Corrected Page) jgt 0 5 $6 NO.: NR192D103U DATE: February 18, 1966 PAGE 10F 4 DEVICE TYPE: Fill-level Gauge Source Holder MODEL: 02-0036-ML-1, ML-1-5 MANUFACTURER / DISTRIBUTOR: Brun Corporation Columbus, OH MANUFACTURER / DISTRIBUTOR:

SEALED SOURCE MODEL DESIGNATION: Nuclear Chicago 850233 ISOTOPE: Cesium-137 MAXIMUM ACTIVITY: 50 millicuries LEAK TEST FREQUENCY: 6 months t-PRINCIPAL USE: (D) Ganna Gauge CUSTOM DEVICE: YES X NO 9710100167 970929 PDR RC *

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' REGISTRY OF RADI0 ACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF DEVICE

-NO.: 'NR192D103U DATE: Februa ry 18, 1966- PAGE 2 0F 4 DEVICE-TYPE: Fill-level Gauge Source Holder '

DESCRIPTION:

The outer physical characteristics of the 02-0036-ML-1 are those of a closed steel cylinder 5-3/8 inches in height and 3-1/2 inches in diameter, mounted with its longest axis vertical on a 3/16 inch thick steel bottom plate. The bottom plate is. attached to the cylinder with eight screws. -The 3/16 inch thick steel top plate is welded to the cylinder which has a wall thickness of 7/16 inch. R mounting bracket is welded to the side of the cylinder.

The mounting bracket-extends the full length of_ the device and also serves as a

_ protected-: passageway for electrical leads from electrical components mounted inside the device. A tubular cable connector housing welded to the upper portion of the mounting bracket, and projecting laterally from it, is a continuation of the protected passageway and partially encloses an internal sleeve and cable connector assembly. .The entire unit-is designed to be airtight.

-The source of radiation is mounted at the approximate center of a cylindrical shield consisting of two Mallory-1000 cylindrical shields fitted together one on-top of the other. _ The lower-shield section includes = a beam port, with maximum

. dimensions of 15/16 inch (height) by 1/4 inch (width) at the outer surface, and

' _~ suitable machined openings for the mounting of the Mallory-1000 source rotor.

=The. source at the edge of the rotor is moved 45 degrees 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 shielded 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 cnnsole.

LABELING:

A metal label 3-3/8 inches by 2-3/16 inches, attached to the outside of the device 90% from the cable connector bears the following:

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e REGISTRY OF RADIDACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF DEVICE l'

NO.: NR192D103U OATE: February 18, 1966 PAGE 3 0F 4 DEVICE TYPE: Fill-level Gauge Source Holder LABELING (CONT'D):

" CAUTION: -RADIOACTIVE MATERIAL Cesium-137 mc Date of Measurement Model No. 02-0036-ML-1 BRUN CORPORATION, COLUMBUS, OHIO" The-label is basically yellow in color with black lettering and a magenta radiation symbol.

EXTERNAL RADIATION LEVELS:

In accessible areas at one foot from tc9 surface of the less with a 61'millicurie, cesium-137 source in the "Off" position.02-0036-ML-1 A radiation are 3 mr/hr or level of- 7 mr/hr exists.over a small area in the region of the beam port which is -

Inaccessible with the. unit' installed.

LIMITATIONS AND/0R OTHER CONSIDERATIONS OF USE:

The 02-0036-ML-1 device was evaluated on the basis that it will be mounted

- to the. side of a~ steel mold thereby preventing access to the beam of radiation Land reducing radiation levels in the forward direction to about 0.1 mr/hr. If direction will.be necessary.other applications are proposed, an evaluation of: rad  ;

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The' user the containing is instructed cesium-137bysource.

the Brun Carporation to avoid-tampering with the device contract will--'normally be sold with eachThe Brun Corporation states that a service-02-0036-ML-1 to include six months-

-forming source leak tests. visits by Brun representative-for the purpose of inspecting th

-The Brun: Corporation has also stated that they will install and relocate the .

source holders and perform a radiation survey at the time of installation.

-Since an "on-off" indicator is not located at the source shield and since the control console may be remote from the shield, considerations must be given to exposure of persons not aware of the exposed position of the source.

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REGISTRY OF RADI0 ACTIVE SEALED SOURCES AND DEVICES 1AFETY EVALUATION OF DEVICE

.NO.: NR192D103U DATE: Februa ry 18, 1966 FAGE 4 0F 4 ,

DEVICE TYPE: Fill-level Gauge Source, Holder ISSUING AGENCY:

U.S. Nuclear Regulatory Commission l

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