ML20154E254
| ML20154E254 | |
| Person / Time | |
|---|---|
| Issue date: | 07/28/1983 |
| From: | Steven Baggett NRC |
| To: | |
| Shared Package | |
| ML20154E144 | List: |
| References | |
| SSD, NUDOCS 9810080121 | |
| Download: ML20154E254 (4) | |
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l REGISTRY OF RADI0 ACTIVE SEALED SOURCES AND DEVICES
- c. ,.
SAFETY EVALUATION OF DEVICE (Correct 6d Copy) ,
NO: NR-283-0-105-S. DATE: e. PAGE 1 0F 4 JUL 2 8 1983 1 -
DEVICE TYPE: High Range Calibration Unit i
MODEL: CDV-794 Model.No. 2 ,
DISTRIBUTOR _:
sFederal Emergency Management Agency 500 C Street, S.W.
Washington, D.C. 20472 s
- MANUFACTURER
- Technical Operations, Inc. .
Radiation Products Division Burlington, MA 01803 i
k .
SEALED SOURCE MODEL DESIGNATION: Oak Ridge National Laboratory Model Nos.
ORNL-2339AA or ORNL DSK-2384 ISOTOPE: Cesium-137 MAXIMUM ACTIVITY: 143 curies L LEAK TEST FREQUENCY: 6 months PRINCIPAL USE: , (I) Calibration Source 1
1 CUSTOM DEVICE: Y e.S X NO l
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I 9810000121 981007 7 PDR RC
- SSD PDR
REGISTRY OF RADIDACTIVE S'EALED SOURCES AND DEVICES SAFETY EVALUATION OF DEVICE "
(Corrected Page)
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ij_0,: NR-283-D-105-S DATE: Jill 2 g pg PAGE 2 0F 4 DEVICE TYPE: High Range Calibration Unit DESCRIPTION:
The calibrator provides four tensity fn,CD levels V-794forModel No. 2, calibrating contains radiation a sealed survey meters.Cesium-137 Inside so the calibrator, the radiation source has a fixed position relative to the survey meter in the exposure chamber. The specific strength of the radiation field in the exposure chamber is controlled through a rotary attenuator. While a meter is-in the radiation field, calibratic- 1djustments are done via remote controls.
Meter readings are observed directly ough the lead-glass window of the chamber door. '
The nominal accuracy of the calibrator is maintained by the periodic '(approximately l every two years) a'djustment of a decay compensator. The initial radiation !
I intensity'of the source is adjusted at the manufacturer's facility.
The source housing is made of a cast depleted uranium. The housing has three parts: main shield, attenuator disc, and the collimator.
The source is a composed Cesium-137 chloride pellet that is doubly encapsulated in"316 stainless steel and Tealed by welding.
The Model ORNL,2339,A ,, source has been replaced by a new source model ORNL-D3K 2384.
The new sourc'e' has been test.ed and.. meets Special Form testing requirements.
The e tire source housing cons'ist'ing of the exposure chamber and electronics armnol. i placed in a lockable metal cabinet.
LABELING: ,
The unit is labeled in accordance with Section 20.203, 10 CFR Part 20.
DIAGRAM:
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See-Attabhments 1'and 2.
CONDITIONS OF NORMAL USE:
The device will be used in a laboratory environment and by trained personnel to
( remotely calibrate high range CDV survey meters.
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,, REGISTRY OF RADI0 ACTIVE SEALED SOURCES AND DEVICES
~ SAFETY EVALDATION OF DEVICE
(. Corrected Copy) >
fj0,: NR-283-0-105-5 DATE: JUL 2 81983 PAGE 3 0F 4
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DEVICE TYPE: High Range Calibration Unit
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PROTOTYPE TESTING- :
l The-seaJed source Model ORNL-233 9A has previously been desrJed acceptable j
.by the .NRC. The sealed source Model ORNL .DSX-2384 has been tested.and achieved j D 0 T 'special form iequirements ? Also, 'the source achieved an ANSI'N542 of 77E43525.. '
Th,e device manufacturer. performed the following tests on the device: * * '_
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- o Operational Test -
o Radiation Fie1d Test o ' Temperature Test at -30*F to 125* ~
o Hum'dity Test o Shock Test . ,
EXTERNAL RADIATION LEVELS: ,
The device manufacturer reports that dise rates up.to. 400_R/ht_. ate..obtained..wi. thin th l chamber. Additionally, the device is designed so that radiation dose rates at '
-( every- accessible ' surface of the unit, with the exception of the beam path, does not exceed 2 mr/hr.
OUALITY ASSURANCE AND CONTROL:
The manufacturer and disthib0 tor has previously submitted a program _that was deemed .
acceptable by the NRC. A copy of the program is on file with the Material '
Certification and Procedure'ssaranch. .~
LIMITATIONS AND/0R 0THER. CONSIDERATIONS OF USE:
o The device shall 5e distributed only to persons specifically licensed by the NRC or an Agreement State.
,o The device s[all be leak tested at six mor.ch intervals using techniques capable of Jetecting 0.005 microcuries of removable contamination.
o Handling, storage, use, tra'nsfer, and disposal: To be determined by the licensing aut.1ori ty. Inview that the. sealed source exhibit high surface dose rates when unshielded, the sealed source should be handisd only by experienced licensed personnel using adequate remote handling equipment and procedures, i
o This registration sheet and the information contained within the references shall not be changed or transferred without the written consent of the NRC, t
REGISTRY OF RADI0 ACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF DEVICE
, , (Amended Copy)
M: NR-283-0-105-S DATE:
M2 81933 PAGE 4 E 4
- DEVICE TYPE: High Range Calibration Unit l
SAFETY ANALYSIS
SUMMARY
Based on our review of the'infomation and test dated cited below, that the device ,
was previously deemed acceptable for licensing by the NRC in the 1960's, that the new replacement source improves the containment of Cesium-137 chloride pellets, we continue t'o find the CDV-794 model 2 calibration design acceptable for licensing-purposes.
Furthermore, we conclude that the de' vices would be expected to maintain their containment integiity for normal conditions of use and accidental conditions which might occur during uses specified in this certificate. ,
REFERENCES:
The following supporting documents for the Model CDV-794 No. 2 high range calibration f- unit are hereby incorporated by reference and are made a part of this registry L document: .
l o Federal Emergency Manacament Agency License No. 08-01297-06 and letter j dated July 8,1983, with enclosures thereto.
ISSUING AGENCY: ,
U.S. Nuclear Regulatory Commission 1
Date: Reviewer: , [
Date: Concurrence: [s u. f, m i u . t, f 4 0 l
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