ML20248B388
| ML20248B388 | |
| Person / Time | |
|---|---|
| Issue date: | 01/14/1991 |
| From: | Steven Baggett NRC |
| To: | |
| Shared Package | |
| ML20248B384 | List: |
| References | |
| SSD, NUDOCS 9806010282 | |
| Download: ML20248B388 (11) | |
Text
_ _. _ - _
O.
Q REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF SEALED SOURCE NO.: NR-460-S-147-S DATE:
JAN 141991 PAGE 1 OF 4 SEALED SOURCE TYPE:
Beta Source i
i MODEL:
3B4G i
MANU,FACTURER/ DISTRIBUTOR:
Minnesota Mining and Manufacturing TCAAP Building 590 i
l New Brighton, MN-55112 l
ISOTOPE:
MAXIMUM ACTIVITY:
l Krypton-85 10 millicuries
~ LEAK TEST FREOUENCY:
No Leak Test Required PRINCIPAL USE:
(R) Gas Source l'
' CUSTOM SOURCE:
YES X
NO k
.e<
'SSD '
L.
LJ w
l REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF SEALED SOURCE HQ1L NR-460-S-147-S DATE: JAN 14 1991 PAGE 2 OF 4 SEALED SOURCE TYPE:
Beta Source
)
i DESCRIPTION:
The 3M sealed source Model 3B4G is constructed per the details of drawing 12-1921-0780-8.
It consist of 316 stainless steel tube (0.070" O.D. x 0.066" I.D.) of varying lengths with 0.125" diameter copper tube brazed to each end.
The length of the stainless steel tube is dependent on the desired active length of the source.
The active length may vary from 1 1/2" to 12".
The I
source is filled through one of the copper end tubes (sources are never filled above atmospheric pressure.).
The end of each copper tube is sealed by being crimped and silver brazed.
DIAGRAM:
An engineering drawing (DWG. NO. 12-1921-0780-8) of the source l's shown in attachment 1.
I LABELING:
j The sealed sources are not labeled because of their size.
- Thus, l
the storage container or device in which the source is used is labeled with the source isotope, activity, date of assay, and the words " CAUTION-RADIOACTIVE MATERIAL".
The manufacturer also provides a certification form with the source which includes the model number and serial number of the source.
CONDITIONS OF NORMAL USE:
The sealed source is designed for miscellaneous industrial applications such as air ionization, static elimination, and beta gauging within a temperature range of 32*F to 158'F (0*C to 70'C) and atmospheric pressure.
l PROTOTYPE TESTING:
The sealed source Model 3B4G was prototype tested to ANSI N542-1977 and achieved a classification of 77C32131.
m______
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l REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF SEALED SOURCE NO.: NR-460-S-147-S DATE:
PAGE 3 OF 4 JAN !4 um SEALED SOURCE TYPE:
Beta Source EXTERNAL RADIATION LEVELS:
An air ionization unit having a 7.0 milligram /cm window density l
2 z
(45.6 ca window area) was used to measure the radiation dose rates from a 10 mci Model 3B4G sealed source.
Radiation dose rates at 5 cm and 30 cm are listed below.
Position Radiation Dose Rate at E_GE 30 cm Normal to. Window (no beta shield) 43.0 R/hr*
1200.0 mR/hr Normal to Window (with beta shield) 1.2 mR/hr 8,0 mR/hr
- Estimate OUALITY ASSURANCE AND CONTROL:
The Quality Assurance Program used to ensure the sealed sources are fabricated to the NRC approved design is based on Mil-Q-9858-A guidelines.
The program has been previously deemed acceptable for licensing purposes by NRC.
LIMITATIONS AND/OR OTHER CONSIDERATIONS OF USE:
. The sealed source shall only be distributed to specific licensees of NRC or Agreement States.
Handling, storage, use, transfer, and disposal:
To be
)
determined by the licensing authority.
J I
The sealed source shall not be subjected to environmental or other conditions which exceed ANSI N542 Classification 77C32131.
J
. This registration sheet and the information contained within l
the references shall not be changed without the written t
consent of'the NRC.
I i
l l
l L
l REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF SEALED SOURCE i
NO.: NR-460-S-147-S DATE: JAN 14199i PAGE 4 OF 4 SEALED SOURCE TYPE:
Beta Source l
SAFETY ANALYSIS
SUMMARY
The Model 3B4G is a low activity-(up to 10 millicuries) gaseous-Kr-85 source designed for gauging. applications.
l-Completed sources are subjected to-Quality Control Testing and are shipped to specific licensees such as industrial. gauge manufacturers who install them in shielded gauging devices.
l During the source life cycle, the greatest potential for-I l_
personnel exposure is during source filling and loading
')
l:
operations.
These operations are performed only by persons l
specifically licensed and are under careful radiological protection control.
Based on review of~ Minnesota Mining and Manufacturing's sealed source, Model 3B4G, and the information and test data cited I
below, we continue to conclude that this sealed source is acceptable for specific licensing purposes.
Furthermore,.we continue to conclude that this sealed source
~
would be expected to maintain its containment integrity 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 3B4G sealed source are hereby incorporated by. reference and are made a part-of this registry document.
Minnesota-Mining and Manufacturing's letters dated June 17, 1968,-June 11, 1980, March 6, 1981, May 19, 1981, June'8, 1990, and' December 14, 1990, with enclosures thereto.
ISSUING AGENCY:
U.S. Nuclear Regulatory Commission I I ISSI Reviewer:
Date:
Date:.
Concurrence:
W M
0
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b REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF SEALED SOURCE l
l JAN 14 %^1 NO.: NR-460-S-147-S DATE:
377xcaggg7 1
, - FlLL WIT 4 ITEN bel ~0RE CRIMPING APID *EALING
' WITH ITEM 5 i '
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1.00 1
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,9-ACTIVE
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LENGTH
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- Active Length varies from 1 1/2" to 12".
Item Description 1
Tube, 316 Stainless Steel (0.070" O.D. x 0.066" I.D.)
2 Tube, Copper ASTM B-75, Soft, Seamless (0.125" O.D. x 0.030" wall) 3 Braze: Silver, Cad. free Allstate 155-4 Gas: Kr-85 Drawina 12-1921-0780-8
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I REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF SEALED SOURCE I
JAN 14 mi HL.J. NR-460-S-147-S DATE:
ATTACHMENT 1 FlLL WIT'4 ITEM BEFORE j'
CRIMPING Atl0 *EALING WITH nTE.kA 5 i.I EE 2
'l
'N*
1.00
.13 4
a Droll COPPER TUBE I.C.
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TO DEPTM.075 OtA
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(*43 DRtLQ-ZPL
,9-ACT tVE
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LENGTH L.._
L
's.
33 NLi 3 SEAL I
2 PL i
.63
' :nwo acT4 Ems
- Active Length varies from 1 1/2" to 12".
Item Description 1
Tube, 316 Stainless Steel (0.070" O.D. x 0.066" I.D.)
2 Tube, Copper ASTM B-75, Soft, Seamless (0.125" O.D. x 0.030" wall) 3 Braze: Silver, Cad. free Allstate 155 4
Gas: Kr-85 Drawing 12-1921-0780-8
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9 REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF. SEALED SOURCE i
i I
h NR-460-S-147-S DATE:
JAN 141991 PAGE 1 OF 4
{
SEATED SOURCE TYPE:
Beta Source I
MODEL:
3B4G 1
l MANUFACTURER / DISTRIBUTOR; Minnesota Mining and Manufacturing TCAAP' Building 590 New Brighton, MN 55112
)
'/
ISOTOPE:
MAXIMUM ACTIVITY:
Krypton-85 10 millicuries i
TMK TEST FREOUENCY:
No Leak Test Required
)
PRINCIPAL USE:
(R) Gas Source CUSTOM SOURCE:.
YES X
NO I
l l
1 i
O O
REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICE SAFETY EVALUATION OF SEALED SOURCE HQal NR-460-8-147-S DATE: JAN t 4131 pace 2 or 4 SEALED SOURCE TYPE:
Beta Source DESCRIPTION:
The 3M sealed source Model.3B4G is constructed'per the details of drawing 12-1921-0780-8.
(0. 070" : 0. D. x 0. 066" I.D. )It consist of 316 stainless steel tube diameter copper tube brazed to each end.of. varying lengths with 0.125" The length of the stainless steel tube is dependent on the desired active. length of the source.
The active length may vary from 1 1/2" to 12".
source is filled through one of the coppe The never filled above atmospheric pressure.) r end tubes (sources are The end of each copper tube is sealed by being crimped and silver brazed.
DIAGRAM:
An-engineering drawing (DWG. NO. 12-1921-0780-8) of the source is shown in attachment 1.
~
LABELING:
The sealed sources are not labeled because of their size.
the storage container or device in which the source is used is
- Thus, labeled with the source isotope, activity, date of assay, and the words " CAUTION-RADIOACTIVE MATERIAL".
The manufacturer also provides a certification form with the source which includes the model number and serial number of the source.
i I
CONDITIONS OF NORMAL USE:
The sealed source is designed for miscellaneous industrial applications.such as air ionization, static elimination, and beta gauging within a temperature range of 32 *F to 158'F (0*C to 70*C) and atmospheric pressure.
PROTOTYPE TESTING:
The sealed source Model 3B4G was prototype tested to ANSI N542-1977 and achieved a classification of 77C32131.
I e
J
I t
1.Q REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF SEALED SOURCE HQxi NR-460-S-147-S DATE:
JAN 14 tsj PAGE 3 OF 4 SEALED SOURCE TYPE;.
Beta Source EXTERNAL RADIATION LEVELS:
An air ionization unit having a 7.0 milligram /cm window density 2
2 (45.6.cm window area) was used to measure the radiation dose rates from a 10 mCl Model 3B4G sealed source.
Radiation dose rates at 5 cm and 30 cm are listed below.
Position Radiation Dose Rate at 5 cm 30 cm Normal to Window (no beta shield) 43.0 R/hr*
1200.0 mR/hr Normal to Window (with beta shield) 1.2 mR/hr 8.0 mR/hr
- Estimate OUALITY ASSURANCE AND CONTROL:
The-Quality Assurance Program used to ensure the sealed sources are fabricated to the NRC approved design is based on Mil-Q-9858-1 A guidelines.
The: program has been previously deemed acceptable i
for licensing purposes by NRC.
LIMI3ATIONS AND/OR OTHER CONSIDERATIONS OF USE:
+ The sealed source shall only be distributed to specific licensees of NRC or Agreement States.
Handling, storage, use, transfer, and disposal:
To be determined by the licensing authority.
- The sealed source shall not be subjected to environmental or other conditions which exceed ANSI N542 Classification 77C32131.
- This registration sheet and the information contained within the references shall-not be changed without the written consent of the NRC.
O o
REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF SEALED SOURCE h NR-460-S-147-S DATE: JAN t 41991 PAGE 4 OF 4 SEALED SOURCE TYPE:
Beta Source SAFETY ANALYSIS
SUMMARY
The~Model.3B4G is a low activity (up'to 10 millicuries) gaseous Kr-85 source designed for gauging applications.
Completed sources are subjected to Quality control Testing and are shipped to specific licensees such as industrial gauge manufacturers who install them in shielded gauging devices.
During the source life cycle, the greatest potential for personnel exposure is during source filling and loading operations.
These operations are performed only by persons specifically licensed and are under careful radiological protection control.
Based on review of Minnesota Mining and Manufacturing's sealed source, Model 3B4G, and the information and test data cited below, we continue to conclude that this sealed source is acceptable for specific licensing purposes.
Furthermore, we continue to conclude that this sealed source would be expected to maintain its containment integrity 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 3B4G sealed source are hereby incorporated by reference and are made a part of this registrv document.
Minnesota Mining and Manufacturing 8s letters dated June 17, 1968, June 11, 1980, March 6, 1981, May 19, 1981, June 8, 1990, and December 14, 1990, with enclosures thereto.
ISSUING AGENCY:
U.S. Nuclear Regulatory Commission I I ISSI Date:
Reviewer:
JAN f 4 iggf
"(
e.
/"M l
Date:
Concurrence:
l-O O
1 l'
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REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF SEALED SOURCE l
M NR-460-S-147-S DA77J. M I4 ATTACHMENT 1
. FILL WIT'8 STEM DEVORE CRIMPINS A?!
ALING
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EE
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2 1.00 f
f U...
13 4
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DRIlt. COPPER TUBE 1.C.
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70 DEPTH.O~tS Olk l
(*49 DmLL)-ZPL y
ACTIVE LENGTH
&'~
t N l _ l.. _
l
.15 3 SEAL I
{
2 PL i
.63 1
'-:RWS noT4 t*cs
- Active Length varies from 1 1/2" to 12".
l 1t33 Description 1
Tube, 316 Stainless Steel (0.070" O.D. x 0.066" I.D.)
2 Tube, Copper ASTM B-75, Soft, Seamless (0.125" O.D. x 0.030" wall) l 3
Braze: Silver, Cad. free Allstate 155 l
4 Gas: Kr-85 l
i Drawina 12-1921-0780-8
-_a