ML20154R963
| ML20154R963 | |
| Person / Time | |
|---|---|
| Issue date: | 10/21/1998 |
| From: | Michele Burgess, John Lubinski NRC |
| To: | |
| Shared Package | |
| ML20154R650 | List: |
| References | |
| SSD, NUDOCS 9810270239 | |
| Download: ML20154R963 (8) | |
Text
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.n REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF DEVICE NO.: NR-300-D-870-S DATE: OCT 21 1993 PAGE 1 OF 5 DEVICE TYPE: Radiographic Exposure Device MODEL: 180 MANUFACTURER / DISTRIBUTOR: Gamma Industries, Inc.
P.O. Box 2543 Baton Rouge, LA 70821 l
SEALED SOURCE MODEL DESIGNATION: Gamma Industries A-11-T ISOTOPE: MAXIMUM ACTIVITY:
Cobalt-60 1,000 C1 (37 TBq)
I LEAK TEST FREQUENCY: 6 Months PRINCIPAL USE: (A) Industrial Radiography CUSTOM DEVICE: YES X NO
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9810270239 981021 PDR RC
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REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES L . SAFETY EVALUATION OF DEVICE NR-30'-D-870-S OCT 21 1998 NO.: 0 DATE: PAGE 2 OF 5
. DEVICE TYPE: . Radiographic Exposure Device
-DESCRIPTION:
The device consists of a lead sh'ield enclosed in a 1/4" (6.35 mm) steel case in the form of a right circular cylinder with 1/4" (6.35 mm) steel end plates. It has a collimation port at the center bottom and another collimation port on the side. These collimation ports are enclosed with 1/4" (6.35 mm) plates for the side port and a 1/4" (6.35 mm) steel machined cone for the bottom port. The source never leaves this device. It is moved by means of a pigtail assembly from the shielded position to a collimation i port.
The outside dimensions of the device are 21" (53.34 cm) in diameter by 25-3/4" (65.41 cm) in height. Approximate weight is 3,647 pounds (1,654.3 kg).
A stainless steel source tube extends through the shielding mass.
At the safe position, the tube is reduced in diameter so that the source is blocked from further passage in the tube. At the i exposed position of the source, the tube is blocked with a I threaded plug, removable for source exchange, which also serves to center the source in the tube. The collimation port at the bottom center of the device is a 45 degree cone. The side collimation port projects a beam of radiation that extends horizontally at the bottom and diagonally upwards to the degree necessary for customer use. The side collimation port extends from 180 degrees to a maximum of 300 degrees. The circumferential and vertical angles are determined by suspending lead blocks in the side collimation port. These blocks are designed to prevent streaming.
At the top of the device, the source pigtail assembly extends from the source tube and is attached to a spring loaded air cylinder. The air cylinder has a 1-1/8" (2.86 cm) diameter bore and a 13" (33.02 cm) stroke. Pressure will cause the spring to retract the source to the safe position and will not expose the source again until the air and electrical supply is regained and positive. action is initiated. The air cylinder is held in place by a T-shaped support 52-1/2" (1.33 m) long. This support may be placed in either a horizontal or vertical positions The pigtail
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l REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF DEVICE NO.: NR-300-D-870-S DATE: OCT 21 1998 PAGE 3 OF 5
' DEVICE TYPE: Radiographic Exposure Device DESCRIPTION (Cont'd):
which protrudes from the air cylinder is supported through a 9/16" (14.29 mm) diameter stainless steel tube attached to the cylinder by screws. Two (2) micro-switches are also attached to the support arm to give indication to the control panel of safe and exposed position of the source.
This device is supported on a base assembly whose dimensions vary according to the foundation supplied by'the customer.
The manufacturer furnishes operating instructions and a copy of a
' recommended preventive maintenance program. The operating instructions supplied by the manufacturer are not complete for each facility since each is a custom installation and the control circuitry and interlock system will vary according to the
= customer. Therefore, the licensing agency should review the licensee's. operating and emergency procedures and ensure that all interlock systems are designed in such a manner that, after an automatic retreat of the source, the system must be reactivated 1 by the system start switch, a direct operator action. The system I start switch should be key controlled so the system may be locked by the operator. The licensing agency should also ensure that the entire control circuitry, including any radiation alarms, doors, interlocks, emergency retreat, etc., operate from the same 115 volt electrical supply. .This caution is made to the customer in the operating procedures supplied by the manufacturer.
LABELING:
The device bears the manufacturer's label which specifies the isotope, activity, _date of source calibration,' model and serial ,
numbers of the device,-model and serial numbers of the source and l states that the-device is-manufactured by Gamma' Industries, a l Division of Nuclear-Systems, Inc., Baton Rouge, Louisiana. Three
" Caution, Radioactive Material" labels are also attached to the device. l l
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u l REGISTRY OF. RADIOACTIVE SEALED SOURCES AND DEVICES
! SAFETY EVALUATION,OF DEVICE-I. '
NO.: NR-300-D-870-S' 'DATE , OCT 21.1954 '- PAGE 4 OF 5 DEVICE TYPE: . Radiographic Exposure Device
~ EXTERNAL RADIATION LEVELS:
The highest exposure rate noted at any accessible surface of the exposure device was 100 mr/hr in the throat of the side collimation port. This throat has a PVC spacer installed which
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prevents'an individual from actually being able to come in contact'withithe source tube. However, if this spacer were q
. removed, the exposure rate would then be 240 mr/hr on contact with the source tube.. The_ exposure rate on contact with the rest of.the surface of the device ranged-from less than 1 mr/hr to 17 mr/hr. The exposure rate at 39"-(1 meter) from any accessible -
portion of the surfaceLof the exposure device was'less than
.l.mr/hr. -These-measurements were confirmed by the Division, using:a Ludlum Model'3 G-M survey meter.
LIMITATIONS AND/OR OTHER CONSIDERATIONS OF USE:
. -The device'shall be possessed and used by persons specifically licensed by the NRC or an Agreement State.
4 Handling, storage, use, transfer, and disposal: To be l determined by the licensing authority.
. This: registration sheet and the information contained within
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the references shall not be changed without the written consent-of the NRC.
' SAFETY ANALYSIS
SUMMARY
ThezModel'-180 device is no longer manufactured or distributed by Gamma Industries,.Inc. and. Gamma Industries, Inc. is no longer in business. 'Therefore,-the registration certificate is being L
. converted to an inactive registration certificate.
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LREGISTRY OF. RADIOACTIVE SEALED ~ SOURCES-AND DEVICES SAFETY' EVALUATION OF' DEVICE. E i
, NO.: NR-300-D-870-S -DATE: E 2I PAGE 5 OF 5 DEVICE TYPE: , Radiographic-Exposure Device-SAFETY ANALYSIS
SUMMARY
(Cont'd):
Thel device was. originally approved for' licensing. purposes byfthe-Louisiana Division of Radiation Control. ' NRC attempted to obtain
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copies of all_information submitted.by the registrant in support
'of the~ evaluation . However, NRC could not locate all the information. - Therefore, no safety evaluation of'the device was performed as part of the conversion of the certificate to-inactive' status'.
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ISSUING AGENCY:
Jj iU.S. Nuclear.' Regulatory Commission
' 2l 0 Date: Reviewer: ~
John W. Lubinski-
- Date: Concurrence: M jJ Mum ,m Michele L. Burgess
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nk-O I 1( REGISTRY OF RADI0 ACTIVE SEALE0 SOURCES AND.0EVICES.
- SAFETY EVALUATION OF DEVICE NO. : - LA300D136U DATE: March 1979 PAGE 1.0F 4 DEVICE TYPE: Radiographic Exposure Device
- MODEL: 180 Gama Industries, Inc.
. MANUFACTURER / DISTRIBUTOR:
P.O. Bo n2543 ,
Baton Rouge, LA 70821_ '
MANUFACTURER / DISTRIBUTOR:-
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~SEALEbSOURCEMODELDESIGNATION: Gama Ind. A-11-T-
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ISOTOPE: Cobalt-60 MAXIMUM ACTIVITY: -1000 curies l
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LEAK-TEST-FREQUENCY:
PRINCIPAL-USE: ' Industrial Radiography CUSTOM DEVICE: YES X NO '
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(/)L REGISTRY OF RADI0 ACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF DEVICE NO.: LA300D136U DATE: March 1979 PAGE 2 0F 4 DEVICE TYPE: Radiographic Exposure Device DESCRIPTION:
.The device consists of a lead shield enclosed in a 1/4" steel case in the form of a right circular cylinder with 1/4" steel end plates. It has a collimation port at the center bottom and another collimation port on the side. These collimation ports are enclosed with 1/4" plates for the side port and a 1/4" steel machined cone for the bottom port. The source never leaves this device. It is moved by means of a pigtail assembly from the shielded position to a collimation port.
The outside dimensions of the device are 21" in diameter by 25-3/4" in height.
Approximate weight is 3,647 pounds.
A stainless steel source tube extends through the shielding mass. At the safe
'( O position, the tube is reduced in diameter so that the source is blocked from further
.(j passage in the tube. At the exposed position of the source, the tube is blocked with a threaded plug, removable for source exchange, which also serves to center the source in the tube. The collimation port at the bottom center of the device is a 45 degree cone. The side collimation port projects a beam of radiation that extends horizontally at the bottom and diagonally upwards to the degree necessary for customer use. The side collimation port extends from 180 degrees to a maximum of 300 degrees. The circumferential and vertical angles are determined by suspending i lead blocks in the side collimation po'rt. These blocks are designed to prevent i
" streaming".
At the top of the device, the source pigtail assembly extends from the source tube l and is attached to a spring loaded air cylinder. The air cylinder has a 1-1/8" l diameter bore and a 13" stroke. Pressure will cause the spring to retract the !
source to the safe position and will not expose the source again until the air and electrical supply is regained and positive action is initiated. The air cylinder is held in place by a T-shaped support 52-1/2" long. This support may be placed in l either a horizontal or vertical position. The pigtail which protrudes from the air cylinder is supported through a 9/16" diameter stainless steel tube attached to the cylinder by screws. Two (2) micro-switches are also attached to the support arm to give indication to the control panel of safe and exposed position of the source.
This device is supported on a base assembly whose dimensions vary according to the foundation supplied by the customer.
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-(') REGISTRY OF RADI0 ACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF DEVICE i
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'NO.: LA3000136U DATE: March 1979 PAGE 3 0F 4 DEVICE TYPE: Radiograpnic Exposure Device '
LABELING:
The device bears the manufacturer's labe] which specifies the isotope, activity, l date of source calibration, model and serial numbers of the device, model and serial !
numbers of the source and states that the device is manufactured by Gama i Industries, a Division of Nuclear Systems, Inc., Baton Rouge, Louisiana. Three !
" Caution, Radioactive Material" labels are also attached to the device.
EXTERNAL RADIATION LEVELS:
The manufacturer supplied a detailed radiation profile of the device which indicated 1 the maximum exposure at any surface was 150 mr/hr. This was found on contact with
-- the bottom center collimation port which will be inaccessible after the device is Y installed. The highest. exposure rate noted at any accessible surface of the
( exposyre device was 100 mr/hr in the throat of the side collimation port. This throat _has a PVC spacer installed which prevents an individual from actually being able to come in contact with the source tube. However, if this spacer were removed, the exposure ~ rate would then be 240 mr/hr on contact with the source tube. The exposure rate on contact with the rest of the surface of the' device ranged from less than- 1 mr/hr to 17 mr/hr. The exposure rate at 39" (1 meter) from any accessible portion of the surface of- the exposure device was less than 1 mr/hr. These measurements were confirmed by the Division, using a Ludlum Model 3 G-M survey meter. ,
LIMITATIONS AND/0R OTHER CONSIDERATIONS OF USE:
The manufacturer furnishes operating instructions and a copy of a recommended preventive maintenance program. The operating instructions supplied by the manufacturer are not complete for each facility since each is.a custom installation and the control circuitry and interlock system will vary according to the customer.
Therefore, the licensing agency should review the licensee's operating and emergency procedures and ensure that all interlock systems are designed in such a manner that, after an automatic retreat of the source, the system must be reactivated by the
' system start switch, a direct operator action. The system start switch should be key controlled so the system may be locked by the operator. The licensing agency
'should also ensure that the entire' control circuitry, including any radiation alarms, doors, interlocks, emergency retreat, etc., operate from the same 115 volt O
electrical supply. This caution is made to the customer in the operating
/ procedures supplied by the manufacturer.
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