ML20247Q723
| ML20247Q723 | |
| Person / Time | |
|---|---|
| Issue date: | 01/26/1996 |
| From: | Steven Baggett, Doug Broaddus NRC |
| To: | |
| Shared Package | |
| ML20247Q725 | List: |
| References | |
| SSD, NUDOCS 9805280322 | |
| Download: ML20247Q723 (8) | |
Text
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4 REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY. EVALUATION OF~ SEALED SOURCE NO.: NR-460-S-878-S DATE: ' January 26, 1996 PAGE 1 OF 7 SEALED SOURCE TYPE:
Strip Source MODEL:- 4F6P MANUFACTURER / DISTRIBUTOR:
3M Health Physics Services j
3M Center, Building 224-2E-06 St. Paul, MN 55144-1000 ISOTOPE:
MAXIMUM ACTIVITY:
Cesium-137 10.00 curies (370.0 GBq)
LEAK TEST FREQUENCY:
6 Months 1
l PRINCIPAL USE:
(D) Gamma ~ Gauge 1
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CUSTOM SOURCE:
YES X
NO I
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REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF SEALED SOURCE NO.: NR-460-S-878-S DATE: January 26, 1996 PAGE 2 OF 7 SEALED SOURCE TYPE:
Strip Source DESCRIPTION:
The 4F6P source is a doubly-encapsulated strip source.
Cesium-i 137 (Cs-137) is absorbed into small ceramic particles.
The i
isotope is then permanently fixed to the particles using a heat treatment to create 3M Brand Radiating Microspheres. The microspheres are loaded into a.O.125 in. (0.318 cm) outer diameter, 0.0697 in. (0.1770 cm) average inner diameter type 410 stainless steel inner tube.
After the microspheres are loaded, a nominally 0.0695 in. (0.1765 cm) diameter, 0.250 in. (0.635 cm) long inner plug made from type 304 stainless steel is inserted into each end and silver brazed in place, sealing the microspheres inside.
Spacer rings made from type 304 stainless steel are placed around the inner tube and silver brazed in place about 1.000 in.
(2.540 cm) apart. The spacer rings are 0.050 in. (0.127 cm) thick, with a 0.435 in. (1.105 cm) outer diameter and a 0.130 in.
(0.330 cm) diameter hole in their middle to accommodate the inner tube.
One end of the inner tube is inserted into an end plug made from type 304 stainless steel.
The end plug is 0.750 in.
(1.905 cm) long with three 0.250 in. (0.635 cm) long sections.
Beginning from one end, the first section is 0.500 in. (1.270 cm) in diameter, the middle section is 0.438 in. (1.113 cm) in i
diameter, and the final section decreases from a diameter of i
0.438 in. (1.113 cm) at a 5' angle over its length to a diameter of 0.394 in. (1.001 cm).
The inner tube fits into a 0.135 in.
(0.343 cm) diameter hole bored a depth of 0.300 in. (0.762 cm) into the end plug's narrow end.
That hole has an 82* countersink to 0.250 in. (0.635 cm) diameter.
The brazing material is placed in this area when the tube is silver brazed into the end plug.
The wide end of the end plug has a 0.250 in. (0.635 cm) diameter hole bored to a depth of-0.250 in. (0.635 cm).
A 0.500 in. (1.270 cm) outer diameter, 0.444 in. (1.128 cm) inner diameter type 304 stainless steel outer tube is_placed over the spacer rings and pushed over the middle and narrow sections of the end plug.
A second end plug is inserted into the open end of the outer tube so it fits over the inner tube and is TIG welded in place.
The overall length of the Model 4F6P source varies
REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF SEALED SOURCE i
I NO..:. NR-460-S-878-S DATE: January 26, 1996 PAGE 3 OF 7 SEALED SOURCE TYPE:
Strip Source l
DESCRIPTION: (Continued) from 2.500 in. (6.350 cm) to 73.50 in. (1.870 m).
The total length is always 1.500 in. (3.810 cm) longer than the active
' length.
4 DIAGRAM:
See Attachment 1 LABELING:
The following is engraved on the side of the outer capsule:
3M Company Model 4F6P-XXXX XXX mc Cs-137 Sources are labeled with serial number, as well as designation of isotope, active length, and number of millicuries.
l.
l CONDITIONS OF NORMAL USE:
The*4F6P was specifically designed to be compatible with gauging l
devices manufactured by Ohmart Corporation.
I PROTOTYPE TESTING:
l A prototype of the Model 4F6P source was tested according to the l
specifications of ANSI N542-1977 and achieved a classification of i
77C53346.
I In addition, prototypes were subjected to the following destructive tests prior to their original approval:
L l
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l 1
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REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES l
SAFETY EVALUATION OF SEALED SOURCE
{
l NO, NR-460-S-878-S DATE: January 26, 1996 PAGE 4 OF 7 i
i SEALED SOURCE TYPE:
Strip Source PROTOTYPE TESTING: (Continued) 1.
Heat to 1,832
'F (1,000 *C) for 30 minutes 2.
Quench from 1,832
- F (1,000*C) to the temperature of cold i
water at 68 'F (20*C) 3.
Impact of 2 lb-ft, 20 times on each of two points 180*
apart, 3 in. (7.6 cm) from the end of the source 4.
Source bent approximately 30' at 2 points After each test the sources were smear tested and leak tested.
All wipe tests were negative (less than 1x10 #Ci (3.700 Bq) of.
removable radioactivity) and all leak tests were negative (no leakage detected).
EXTERNAL RADIATION LEVELS:
External radiation dose rates were calculated for a 10.00 Ci (370.0 GBq) Cs-137 source as follows:
i Distance Maximum Radiation Level I
(from surface) l (cm)
(in.)
(R/hr)
(Sv/hr) 5 1.97 1320 13.2 30 11.81 36.6 0.37 100 39.37 3.3 0.033 1
l L
REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF SEALED SOURCE j
NO.: NR-460-S-878-S DATE: January 26, 1996 PAGE 5 OF 7 SEALED' SOURCE TYPE:
Strip Source QUALITY ASSURANCE AND CONTROL:
The following quality control procedures were followed_during production of this source:
- 1. The inner tube was wipe tested after the first inner plug was welded.
- 2. The inner tube was wipe tested after both inner plugs were welded.
- 3. The entire source was wipe tested prior to welding the second outer plug.
If the source failed the wipe test, the source was cleaned and retested until a negative wipe test was obtained.
- 4. The completed source was wipe tested upon completion of fabrication, after a 7-day storage period, and during packaging for shipment.
LIMITATIONS AND/OR OTHER CONSIDERATIONS OF USE:
This source may be used only by persons specifically licensed by the NRC or an Agreement State.
j
. Handling, storage, use, transfer, and disposal:
to be determined by the licensing authority.
This source shall not be subjected to environmental or other conditions of use which exceed ANSI Classification 77C53346.
(ANSI N542-1977)
This source shall be leak tested at intervals not to exceed 6 months using techniques capable of detecting 0.005 microcurie (185.0 Bq) of removable contamination.
This registration sheet and the information contained within the references shall not be changed without the written consent of the NRC.
I-REGISTRY OF RADIOACTIVE SEALED-SOURCES AND DEVICES SAFETY-EVALUATION OF SEALED SOURCE NO.: NR-460-S-878-S DATE: January l26, 1996 PAGE 6 OF 7 SEAT.Rn SOURCE TYPE:
Strip Source SAFETY ANALYSIS
SUMMARY
The Model 4F6P sealed source is.not a current product E
manufactured or distributed by 3M Health-Physics Services.
However, 3M Health Physics Services will continue to receive t
~ Model 4F6P sources for disposal.
Based on our review of the Model'4F6P sealed source, and the information and test data cited below, we continue to conclude that the Model:4F6P sealed source is acceptable for specific licensing purposes.
Furthermore, we continue to conclude that the Model 4F6P-source would be expected to maintain:its containment integrity for normal conditions of use and accidental conditions which might occur-during'usesLspecified in this certificate.
REFERENCES:
' The.following supporting documents.for-the Model 4F6P sealed source are hereby incorporated by reference and are'made a part'
- of this registry document:
3M Health Physics: Services' letters dated August 6,'1991,.
j April 11,-1984, January 6, 1965, and March 18, 1964, with I
enclosures thereto 1
- ANSI Tests - Reclassification Radioactive' Sources, Static Control Systems /3M - Test-Report dated August 31, 1982.
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REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY' EVALUATION OF SEALED SOURCE NO,: NR-460-S-878-S DATE: January 26, 1996 PAGE 7 OF 7 SEALED SOURCE TYPE:
Strip Source ISSUING AGENCY:-
U.S.
Nuclear Regulatory Commission
]
k Date:
January 26, 1996 Reviewer:
oc Doug s A. Broaddus Date:
January 26, 1996 Concurrence:
3 teven f7 Baggett 1
l
REGISTRY OF. RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF SEALED SOURCE NO.: NR-460-S-878-S DATE: January.26, 1996 ATTAGMENT 1 11LM QT V FART NO.
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+9 *****,o February 12, 1996 NOTE T0:
MINNESOTA MINING AND MANUFACTURING (3M) INACTIVE FILES FROM:
7
SUBJECT:
INACTIVATION OF REGISTRATIONS BASED ON AUGUST 6, 1991, LETTER.
A number of the background files for the registration certificates requested (by 3M letter dated August 6, 1991) to be made inactive contain limited information on the products. A search of 3M registration, archive, and license files, and information in NUDOCS was performed to obtain additional information. Also, 3M was contacted to obtain any additional information that may have been in their files. 3M provided limited additional information concerning these products and indicated that the information provided represented all additional information in their files.
Additional information obtained from these sources has been added to the applicable registration files.
At the present time, the information contained in the background registration files represents all available information for these products.
In addition, a number of these products were originally reviewed and approved by the Atomic Energy Commission (AEC).
The reviews performed for these products to make the certificates inactive were based on the information available, the previous reviews and approvals, and the historical use of the products (i.e., reports of failures or design problems, or the lack thereof).
In several instances, insufficient information was available to perform an adequate safety review.
In these instances, the certificates have been reissued based solely on the original AEC review and approval, and no additional safety review was performed.
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February 29, 1996 Robert G. Wissink 3M Health Physics Services 3M Center Bldg. 224-2E-06 St. Paul, MN 55144-1000
Dear Mr. Wissink:
This letter is in response to your request dated August 6, 1991, and subsequent letters, requesting to transfer to inactive status ill registration sheets issued 'o 3M as listed in the first column of Enclosure 1.
We have transferred the requested certificates to inactive status. The certificate numbers have been changed as listed in Enclosure 1.
Copies of the inactive certificates are enclosed for your records.
Please read over the registration certificates and notify us immediately if there are any errors or inconsistencies.
-If you have any questions, please contact me at (301) 415-5847 or Mr. Steven Baggett at (301) 415-7273.
Sincerely, l.3/
I Douglas A. Broaddus, Mechanical Engineer Sealed Source Safety Section Source Containment and Devices Branch Division of Industrial and j
Medical Nuclear Safety, NMSS
Enclosures:
As stated Distribution:
l SSSS R/F NE01 SSD-91-71 l
Registration certificate files listed in Enclosure 1 i
DOCUMENT NAME: C:\\WPDOCS\\SSDS\\ INACTIVE \\NRC\\460lNACT. CMP l
T2 sessive e sepy of tids decennent. Inemate in the ben: "C* = Copy without ettechment/ enclosure
- E" = Copy with attachment / enclosure
- N* = No copy 0FFICE SCDB le l
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l NAME DABroaddus DATE 02/27/96 OFFICIAL RECORD COPY anta ux&_ Aji -
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ENCLOSURE 1 REGISTRATIONS TRANSFERRED TO INACTIVE STATUS Old Certificate No.
New certificate No.
Model Number (s)
NR-459-S-101-S NR-8008-S-801-S 4F6Y NR-459-S-102-S NR-8008-S-802-S 3 FIG NR-460-S-101-S NR-0460-S-876-S 4F60 NR-460-S-102-S COMBINED WITH 4F6H, 4F6B NR-0460-S-874-S NR-460-S-103-S NR-0460-S-876-S 4F6G NR-460-S-104-S COMBINED WITH 606A NR-0460-S-865-S NR-460-S-105-S NR-0460-S-877-S 686F NR-460-S-106-S NR-0460-S-878-S 4F6P NR-460-S-107-S NR-0460-S-879-S IC2A, IC2B NR-460-S-108-S NR-0460-S-880-S 4F3B NR-460-S-109-S NR-0460-S-881-S 4F3C NR-460-S-110-S NR-0460-S-882-S 3MIC NR-460-S-Ill-S NR-0460-S-883-S 3MlB NR-460-S-Il2-S NR-0460-S-884-S 3E4G NR-460-S-Il3-S NR-0460-S-885-S 403A NR-460-S-Il4-S NR-0460-S-886-S 4D3B NR-460-S-Il5-S NR-0460-S-887-S 4D60 i
NR-460-S-Il6-S NR-0460-S-888-S 4D6F i
NR-460-S-Il7-S NR-0460-S-889-S 5FID NR-460-S-Il8-S COMBINED INTO 5FIE i
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NR-460-S-119-S 5FIF NR-460-S-120-S NR-0460-S-891-S 5 FIG NR-460-S-121-S NR-0460-S-892-S 3L2B NR-460-S-122-S NR-0460-S-893-S 3L2A NR-460-S-123-S NR-0460-S-894-S 3MlF NR-460-S-124-S NR-0460-S-895-S 3L2C 1
l L______________________
I.
ENCLOSURE 1 REGISTRATIONS TRANSFERRED TO INACTIVE STATUS l
Old certificate No.
New Certificate No.
Model Number (s)
NR-460-S-125-S NR-0460-S-896-S 1E2J NR-460-S-126-S NR-0460-S-897-S 3 FIG NR-460-S-127-5 NONE - NO INFORMATION 4FIE AVAILABLE NR-460-S-128-S NR-0460-S-899-S 5FIH NR-460-S-129-S NR-0460-S-900-S 3E40 NR-460-S-130-S COMBINED INTO 5 FIN NR-460-S-131-S NR-0460-S-901-S 5 FIN (MODIFIED)
NR-460-S-132-S NR-0460-S-902-S 788L NR-460-S-133-S COMBINED INTO 6H6A NR-460-S-134-S
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6H6B NR-460-S-135-S NR-0460-S-904-S 4D6M NR-460-S-136-S NR-0460-S-905-S 3L2E NR-460-S-137-S NR-0460-S-906-S 6500, 6520 (FORM. 6D6C)
NR-460-S-138-S NR-0460-S-907-S 3L2D NR-460-S-139-S NR-0460-S-908-S 3Q1D NR-460-S-140-S NR-0460-S-909-S 3E4L, 3E4S NR-460-S-141-S NR-0460-S-910-S 3 FIR NR-460-S-142-S NR-0460-S-911-S 902, 902F, 903
-NR-460-S-143-S COMBINED WITH 4P6E NR-0460-S-871-S NR-460-S-144-S COMBINED WITH 4P6M NR-0460-S-872-S NR-460-S-145-S NR-0460-S-912-S 3 MIL NR-460-S-146-S NR-0460-S-913-S 3G9A l
NR-460-S-147-S NR-0460-S-914-S 3B4G NR-460-S-148-S COMBINED WITH 4F3F l
(
NR-0460-S-871-S 1
NR-460-S-149-S NR-0460-S-915-S 4F3G i
l
.s ENCLOSURE I REGISTRATIONS TRANSFERRED TO INACTIVE STATUS Old Certificate No.
New Certificate No.
Model Number (s)
NR-460-S-150-S NR-0460-S-916-S 6DIA NR-460-S-151-S COMBINED WITH 6530, 6540 (FORM. 6B6G)
NR-0460-S-869-S NR-460-S-152-S NR-0460-S-917-S 6H6D NR-460-S-153-S NOT REQUIRED ALBUMIN MICR0 SPHERES NR-460-S-154-S NR-0460-S-919-S 6H6E, 8C9T NR-460-S-155-S COMBINED INTO 4D6L NR-460-S-156-S
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4D6P NR-460-S-158-S NR-0460-S-921-S 3F11, 3FlJ, 3FIL NR-460-S-159-S NR-0460-S-922-S 3FIV NR-460-S-160-S COMBINED WITH 4P6T NR-0460-S-873-S NR-460-S-161-S COMBINED INTO 4F3D NR-0460-S-920-S NR-460-S-162-S NR-0460-S-923-S 4F3H NR-460-S-163-S COMBINED INTO 4F6S NR-0460-S-920-S NR-460-S-164-S COMBINED WITH 3E40 NR-0460-S-900-S NR-460-S-165-S NR-0460-S-924-S 6701 NR-460-S-166-S NR-0460-S-925-S 6702 l
NR-460-S-167-S NR-0460-S-926-S 6711 NR-460-S-168-G NR-0460-S-927-G 702, 703, 704 NR-460-S-169-S NR-0460-S-928-S 6510, 6550, 6570 (FORMERLY 686G)
NR-460-S-170-S NR-0460-S-929-S 4P6V NR-460-S-171-S NR-0460-S-930-S 4F6ST i
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