ML20198R249
| ML20198R249 | |
| Person / Time | |
|---|---|
| Issue date: | 01/05/1999 |
| From: | Steven Baggett, Michele Burgess NRC |
| To: | |
| Shared Package | |
| ML20198R252 | List: |
| References | |
| SSD, NUDOCS 9901080134 | |
| Download: ML20198R249 (4) | |
Text
-
\\
^
x
. REGISTRY'OF, RADIOACTIVE SEALED' SOURCES AND DEVICES SAFETY. EVALUATION OF DEVICE L
~NO,: NR-810'5-D-801-S
-DATE: January 5,!1999' PAGE 1 OF 4 DEVICE TYPE:
Instrument Calibratori I
+
MODEL:-
8150-12 0- Cs >-
l l
[
MANUFACTURER / DISTRIBUTOR:
ThermoRetec
-(Formerly TMA/Eberline) i 7021 Pan American' Freeway,-NE
' Albuquerque, NM.87109
' SEALED SOURCE MODEL DESIGNATION:
American Nuclear Corp.
Model 127-0 ISOTOPE:
MAXIMUM ACTIVITY:
Cesium-137 120 Ci (4.44 TBq) i, LEAK TEST FREOUENCY:
6 Months i
PRINCIPAL USE:
(I)
Calibration Sources (Activity i
greater than 30 mci) k
. CUSTOM DEVICE:
YES X
NO i
i e
9901080134 990105 POR fic SSD PDR ltL a w * * ' Al -
L t
e f
t I
l-REGISTRY OFdRADIOACTIVE SEALEDJSOURCES AND DEVICES'
, / S A F E T Y, E V A L U A T I O N ' O F.; D E V I C E.-
4, NO.:.NR-8105-D-801-S DATE:. January 5, 1999.
PAGE 2 OF 4 A
DEVICE TYPE:. Instrument Calibrator DESCRIPTION:
The gamma calibration units consist of a welded 1/4" (6.35 mm) steel cylinder, 18" (45.72 cm) in diameter and'25.5" (64.77 cm)
.high with:a.2:"-(5.08 cm) cylindrical hole running from top to bottom through the center.
Three access plugs are located on top
.and bott'om o' the cylinder.for filling and draining of lead shot.
cThe? lead shot provides shielding for the unit.
When filled with lead shot the unit weighs approximately 2,500" pounds-(1,134 kg).
An orifice.(beam exit), which allows a collimated 15* radiation beata, is located on the side of the unit.
A steel jacketed solid
. lead plug is-inserted in the bottom of the 2" (5.08 cm)
. cylindrical. hole and bolted in place.
Two solid lead' plugs are cinserted'in the upper portion of the 2" (5.08 cm) cylindrical hole.
These plugs form a part of the lifting mechanism.
A stainless steel source holding cup is attached to the bottom of the outer plug.
The. inner plug can be removed to insert the source.
A solid lead filler plug fills the void between upper and lower plugs.
A hand operated' lever is used to lift the source into a fixed
-position in the beam orifice.
Before the lever can be raised, y
quick-release pins must be removed and after the source is raised
. the release pins Imast be replaced to keep the source in the open position.
The source lifting mechanism can be locked in the closed position when'the unit is not in use.
j Two interlock switches control the lighting system which
. indicates the position of the source.
When the source is in the safe condition, a white light is lighted.
When the source is moved to the open position, the white light is extinguished and a red light is lighted.
When the source has been moved to a location where radiation is emitting from the beam orifice, a howler is activated.
The howler is an electronic device, not obtrusively loud, which gives the operatur additional warning that the source is up.
\\
^
'l i
.y.....s-7 m_
. - - - ~.... -
7-t e
e 1
' ' ~(
O,
[:
.'L-
', :y J --
f :; -
a 9,
'u 7-4>
My r
[l'-
. h s,
i '
'I j ',.
~
. SAFETY ;FNALUATION OF, DEVICE.
REGISTRY ~OFsRADIOACTIVE/ SEALED SOURCES AND DEVICES t.-
19 i
s.;
Q.
.5,t NO.: NR-8105bD-801-S,
DATE:, January 5, 1999
' PAGE 3 OF 4 j
m o,
r DEVICE TYPE:
Inst'i-ument Calibrator n
l f
^
!L&gELING:
t
.The' device was. labeled in accordance with the provisions of-10 CFR 20,.1901.
3
-l
. EXTERNAL RADIATION LEVELS:
. The ' calibrator' was ' designed.. to have a-dose rate' less than 1: mr/hr (10 11Sv/hr) on the - surface with the source 'in the safe position.
Tactual radiati'on profiles were not submitted.
, LIMITATIONS AND/OR OTHER CONSIDERATIONS OF USE:
-The radioactive' source in the calibrator is: easily accessible.
- TheLoperating manual accompanying the' calibrator' describes
" methods : for; removal: of: the ' source from the calibrator.
m
-l q
'The gammatcalibration. unit is normally. mounted on a cart assembly and'~ utilized as part of'a'Model 8150-120-Cs-101 gamma calibration range.. When applying for-authorization to use this type of-unit,
'the' applicant should submit a complete description of his
)
- calibration 1 facility and operating procedures.
I i
SAFETY ANALYSIS
SUMMARY
.The Model 8150-120-Cs is'no longer manufactured or distributed by p
_ThermoRetec:and ThermoRetec has'no. intention to produce them any more inLtheffuture.
Therefore, the registration certificate is
'beingl.converte,d'to an inactive registration certificate.
i i
t 3
i.
V e
~
4 ;'
s l
r 1,.;
s REGISTRY [OF~ RADIOACTIVE ~ SEA 7.ED-SOURCES AND DEVICES g
{! 1
- SAFETYfEVALUATION OF DEVICE NO,::NR-8105-D-801-S,
' DATE: January 5,1999 PAGE 4 OF 4 DEVICE TYPE: = Instrument Calibrator.
' SAFETY ANALYSIS
SUMMARY
(Cont'dli The device was originally approved for licensing' purposes by the-AEC.
This certificate was transferred to the Agreement State of New Mexico,and recently returned to the NRC.
Because of'the
~ limited information-available on this unit, no safety evaluation of the. device was-performed as part of the conversion of the certificate to inactive status.
I i
ISSUING AGENCY:
U.S. Nuclear Regulatory Commission Date: January 5, 1999 Reviewer:
Y M
~Date:
Januarv 5. 1999 Concurrence:
M#
- " Steven'Baggett
'l i
__