ML20154F033
| ML20154F033 | |
| Person / Time | |
|---|---|
| Issue date: | 10/07/1998 |
| From: | Michele Burgess, John Lubinski NRC |
| To: | |
| Shared Package | |
| ML20154E969 | List: |
| References | |
| SSD, NUDOCS 9810090051 | |
| Download: ML20154F033 (6) | |
Text
4 REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF DEVICE NO.: NR-8095-D-803-S DATE:
OCT 0 71998 PAGE 1 OF 5 DEVICE TYPE:
Calibration Unit MODEL:
CDV-798 MANUFACTURER / DISTRIBUTOR:
Federal Emergency Management Agency (FEMA) 500 C Street S.W.
Washington, DC 20472 SEALED SOURCE DESIGNATION:
U.S.
Radium Corporation Model 713 ISOTOPE:
MAXIMUM ACTIVITY:
Cesium-137 32 mci (1.184 GBq)
LEAK TEST FREOUENCY:
6 months PRINCIPAL USE:
(T) Calibration CUSTOM DEVICE:
YES X
NO i
9810090051 981007' j
ssD l
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REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF DEVICE HQmi NR-8095-D-803-S DATE: OCT 0 7 HS$
PAGE 2 OF 5 DEVICE TYPE:
Calibration Unit DESCRIPTION:
The CDV-798 Radiological Survey Meter Calibrator is used to calibrate low-range radiological monitoring equipment such as beta / gamma Geiger counters.
The CDV-798 has two basic parts which are assembled and shipped as a unit, the source shield and the cabinet which contains its mechanisms.
The source shield is a steel-jacketed lead container.
The shield is specifically issued for the Cs-137 source used in the CDV-798 calibration unit.
The cover of the shield is secured during i
shipment by-three 0.25 inch (0.635 cm) diameter bolts and a padlock which extends through holes in the flanges on the cover i
and body of the shield.
The Cs-137 source in the lower part of the shield cavity is positioned on the axis of the cavity by means of a toroidal sleeve with diameters just off the diameters of the source capsule and the inside' diameter of the cavity.
On the top of the source, there are one or more thin copper attenuator discs which have been inserted to provide the proper i
exposure rates in the cabinet.
The source and attenuator plates are secured in the cavity by a retainer ring which has two steel balls retained in diametrically opposite cavities along the periphery of the ring.
The cabinet, which is approximately 2 x 2 x 3 feet (61 x 61 x 91 cm), houses the source shield and contains all the mechanisms for removing the cover from the shield and other functions required for positioning the instrument to be calibrated in the resulting radiation field.
The base of the cabinet is a 0.19 inch (0.5 cm) steel plate.
Four brackets mounted on this plate serve the purpose of positioning the source shield on the central axis of the cabinet when the flange of the shield is bolted to the holes provided in the brackets.
DIAGRAM:
See attachment 1.
1 REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF DEVICE NO.: NR-8095-D-803-S DATE:
OCT 0 71988 PAGE 3 OF 5 DEVICE TYPE:
Calibration Unit LABELING:
The manufacturer states that the cabinet of the Radiation Unit is appropriately labeled indicating that it contains radioactive material.
The label on the cabinet door bears the radiation symbol and the words " Caution Radioactive Material" as well as I
the' exposure rates on the cabinet with the cover on the shield;
)
the radioisotope (Cs -13 7) in the device; the quantity of Cs-137; and the date of measurement.
A larger sign on the opposite side of the cabinet bears the radiation symbol and the words " Caution Radioactive Material."
CONDITIONS OF NORMAL USE:
The devices are intended for use in laboratory environments.
EXTERNAL RADIATION LEVELS.1
.j The Federal Emergency Management Agency stated that the radiation level immediately above the shield is approximately 1 R/hr (0.01 Sv/hr) when the shield is open.
Also, they stated that the exposure rate on the top surface of the Radiation Unit cabinet was approximately 10 mR/hr (0.1 mSv/hr) when the cover is off.
PROTOTYPE TESTING:
These devices have been previously deemed acceptable for licensing purposes by the AEC and have been in use at least since 1982'.
We are unaware of any failures related to radiological safety.
OUALITY' ASSURANCE AND CONTROL:
Federal Emergency Management Agency had a quality control program which had been deemed acceptable for licensing purposes by NRC.
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i REGISTRY OF-RADIOACTIVE SEALED SOURCES'AND DEVICES SAFETY EVALUATION OF DEVICE i
NO.
NR-8095-D-8'03-S DATE:
PAGE 4 OF 5 7
DEVICE ~ TYPE:
Calibration Unit 1
LIMITATIONS AND/OR'OTHER CONSIDERATIONS OF USE:
U The-device may'be used by persons'specifically licensed by
- e theLNRC or~an Agreement. State.
Handling, storage, use, transfer, and disposal are to be determined _by:the licensing authority.
l These devices will'no'longeribe commercially. distributed but e
may still'be approved for licensing purposes.
The device shall.be leakitested at intervals not to exceed 6 months using. techniques; capable of detecting l
0.005 microcurie (185 Bq) of removable contamination.
i
- This registration sheet and the information contained within-the references shall not be changed without the written consent of the NRC.
SAFETY ANALYSIS
SUMMARY
This-model was previously deemed acceptable for licensing j
purposes'by the AEC and has been in use since at least 1982.
The Model CDV-798 is no longer distributed by FEMA.
FEMA has stated that all these devices have been granted to the States and became State property (previously loaned), or were disposed of in a disposal site.
Based on the review of the survey meter calibrator and the information cited in the references, we continue to conclude that these devices are acceptable for specific licensing.
Furthermore, we continue to conclude that these devices would be expected to maintain their containment integrity for normal conditions of use and accidental conditions which might occur during uses specified in this certificate.
I
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REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES j
SAFETY EVALUATION OF DEVICE NO.: NR-8095-D-803-S DATE:
PAGE 5 OF 5 DEVICE TYPE:
Calibration Unit
REFERENCES:
The following supporting documents for the device are hereby incorporated'by reference and are made a part of this registry document:
Federal Emergency Management Agency letters datec March 17, 1997, and September 9, 1991, requesting the
. transfer of registration certificates to inactive status.
Equipment Manual /Use and Control of the CDV-798 Model I Radiological Survey Meter Calibrator dated August 1975.
ISSUING AGENCY:
U.S. Nuclear Regulatory Commission
'Date:
Reviewer:
Michel B
gess.
/
OCT 0 71998
/
Date:
Concurrence:
ohn W.
Lubinski l
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I i
a t'
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t REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF DEVICE h NR-8095-D-803-S DATE:
OCT 0 71998 ATTACHMENT 1 t'
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-fu-STEEL LtNER OF A
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-SET SCREW h
yRETAINER STEEL 8ALL
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3 RETAINER RING COPPER ATTENUATOR DISCE l
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NOTE:
RETAINCR RING HAS t/4-20NC TAPPED HOLES
' OFFSET 90* FROM THIS PLANE
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UNITED STATES
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NUCLEAR RE2ULATORY COMMISSION 4
WASHINGTON, D.C. 20606-0001 Y+9 +....,o#
NOTE TO:
SSD97-23/28 Federal Emergency Management Agency (FEMA)
FROM:
Eric B. Compton, Engineering Alde Materials Safety Branch r-
[ga ~
Division of Industrial and Medical
/F Nuclear Safety Office of Material Nuclear Safety and Safeguards DATE:
September 14,1998 RE:
REFERENCES NOT FOUND IN FILE l
in the process of transferring several of FEMA's registration certificates to inactive status it was discovered that a number of items which had been referenced in the original registration certificates were not in the background file. These included the following:
l 1.
Federal Civil Defense Administration Standard item Specification dated May 23,1956, for the Model CDV-786.
2.
Office of Civil and Defense Mobilization letter dated April 6,1959, stating that the CDV-784 was to replace the CDV-786.
3.
Manual of Procedure for the Use and Control of the CDV-778 Radiation training Source Set dated August 1975.
4.
Equipment Manual /Use and Control of the CDV-798 Model I Radiological Survey Meter Calibrator dated August 1975.
5.
Federal Emergency Management Agency letter dated February 17,1983, with enclosures thereto.
6.
Federal Emergency Management Agency renewal application for Materials License No. 08-01297-06, dated August 10,1992 with enclosures thereto.
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