ML20148B642
| ML20148B642 | |
| Person / Time | |
|---|---|
| Issue date: | 01/26/1996 |
| From: | Steven Baggett, Doug Broaddus NRC |
| To: | |
| Shared Package | |
| ML20148B644 | List: |
| References | |
| SSD, NUDOCS 9705130226 | |
| Download: ML20148B642 (6) | |
Text
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REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF SEALED SOURCE 1
NO.: NR-460-S-910-S DATE: January 26, 1996 PAGE 1 OF 5 ]
SEALED SOURCE TYPE: Gauge Source l MODEL: 3 FIR I
1 MANUFACTURER / DISTRIBUTOR: 3M Health Physics Services 3M Center, Building 224-2E-06 St. Paul, MN 55144-1000 ISOTOPE: MAXIMUM ACTIVITY:
Strontium-90 25.00 millicuries (0.925 GBq)
LEAK TEST FREOUENCY: 6 Months PRINCIPAL USE: (E) Beta Gauges CUSTOM SOURCE: YES X NO 9705130226 960126 PDR RC *
, SSD ,_ PDR , j
REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF SEALED SOURCE NO.: NR-460-S-9'10-S DATE: January 26, 1996 PAGE 2 OF 5 .
I SEALED SOURCE TYPE: Gauge Source i DESCRIPTION:
The 3F1R is a singly-encapsulated point source. Strontium-90 1 (Sr-90) is absorbed into small ceramic particles using a heat '
treatment to create 3M Brand Radiating Microspheres. The microspheres are loaded into a 0.250 in. (0.635 cm) long, 0.160 in. (0.406 cm) nominal outer diameter, 0.060 in. (0.152 cm) nominal inner diameter capsule with a 0.002 in. (0.005 cm) thick l stainless steel window, gold brazed across one end. After loading the microspheres, a 0.060 in. (0.152 cm) nominal diameter, 0.180 in. (0.457 cm) long inner plug is inserted and welded in place, sealing the microspheres inside.
The entire inner assembly is inserted, window end first, into a chamber designed to hold it in an outer capsule. The outer capsule is 1.207 in. (3.066 cm) long with a diameter of 0.485 in.
(1.232 cm). A nominally 0.500 in. (1.270 cm) deep, 0.250 in.
(0.635 cm) diameter hole is drilled into one end. A 0.094 in.
(0.239 cm) diameter hole is drilled through the source centered O.188 in. (0.478 cm) from that end. A chamber, whose axis is perpendicular to the 0.094 in. (0.239 cm) diameter hole's axis, is drilled near the opposite end. The chamber is 0.324 in.
(0.823 cm) long with a nominal diameter of 0.162 in. (0.412 cm) and is centered 0.128 in. (0.325 cm) from the end. A coaxial 0.060 in. (0.152 cm) diameter shaft is drilled the rest of the way through the capsule, creating a 0.051 in. (0.130 cm) wide ring around the shaft where it meets the chamber. The inner assembly is inserted into the chamber so that the window is pressed against this ring. That way, the shaft acts as a window or collimator for the radiation beam. Finally, a 0.162 in.
(0.412 cm) nominal diameter, 0.060 in. (0.152 cm) thick outer plug is inserted behind the inner assembly and welded in place, sealing the inner assembly inside.
Both capsules and both plugs are made from type 304 stainless steel.
REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF SEALED SOURCE NO.: NR-460-S-910-S DATE: January 26, 1996 PAGE 3 OF 5
- SEALED SOURCE TYPE: Gauge Source 4
DIAGRAM:
See Attachment 1 l l
LABELING:
The following information was engraved on the side of the outer capsule:
XXX mc Sr-90 Serial No.
CONDITIONS OF NORMAL USE:
The Model 3F1R source was designed for use in a gauging instrument manufactured by Ball Brothers Research Corporation.
PROTOTYPE TESTING:
- l l
A sample Model 3F1R was tested in 1982 in accordance with the specifications of ANSI N452-1977 and achieved a classification of 77C53343.
EXTERNAL RADIATION LEVELS:
The manufacturer did not provide external radiation level data for this source model. As referenced in the 1992 Revised Edition of the Health Physics and Radiological Health Handbook, Rules of l Thumb, for a point source of beta radiation (neglecting self- and j air-absorption) of a given source strength in curies, the dose ,
rate at 0.394 in. (1.0 cm) is approximately equal to 200.0 R/hr !
per mci (54.0 Gy/hr per MBq). The variation with energy is small ;
over a wide range. Based upon this, beta dose rates were l calculated for a 25 mci (0.925 GBq) Pm-147 sealed source to be !
approximately 5,000 R/hr (50 Gy/hr) at 0.394 in. (1.0 cm). This ;
calculation is based upon the neglect of self- and air- l absorption. Also, the absorption due to the shielding material i was not taken into consideration. With the inclusion of the I stainless steel shielding and air-absorption, it is expected that 1 i
r
i 2
l l
REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES l SAFETY EVALUATION OF SEALED SOURCE 1
l NO.: NR-460-S-910-S DATE: January 26, 1996 PAGE 4 OF 5 ;
I SEALED SOURCE TYPE: Gauge Source EXTERNAL RADIATION LEVELS: (continued) external radiation levels at 11.81 in, and 39.37 in. (30.00 cm and 100.0 cm) would be negligible. Likewise, the dose rate at 0.394 in. (1.000 cm) would be expected to be significantly reduced from the calculated value above.
QUALITx ASSURANCE AND CONTROL:
The following quality control procedures were followed during production of this source:
- 1. The inner capsule was bubble leak tested after welding the inner plug in place. If any bubbles were observed from the i capsule while immersed, it failed the bubble leak test..
- 2. The inner capsule was smear tested after welding the inner plug in place and before inserting it into the outer capsule. The maximum allowable limit for this smear test was 0.0005 Ci (18.50 Bq) of removable Sr-90 contamination.
- 3. The completed source was smear tested after fabrication and again immed'ately prior to shipment. The maximum allowable limit for these smear tests was also 0.0005 Ci (18.50 Sq) of removable Sr-90 contamination.
LIMITATIONS AND/OR OTHER CONSIDERATIONS OF USE:
This source may be used only by persons specifically licensed by the NRC or an Agreement State.
- Handling, storage, use, transfer, and disposal: to be determined by the licensing authority.
This source shall be leak tested at intervals not to exceed 6 months using techniques capable of detecting 0.005 gCi (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.
A d
REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF SEALED SOURCE I
NO.: NR-460-S-910-S DATE: January 26, 1996 PAGE 5 OF 5 SEALED SOURCE TYPE: Gauge Source SAFETY ANALYSIS
SUMMARY
l The Model 3F1R source is not a current product manufactured or distributed by 3M Health Physics Services. However, 3M Health 4
Physics Services will continue to receive 3F1R sources for
- disposal.
Based on our review of the Model 3F1R source, and the'information and test data cited below, we continue to conclude that this source is acceptable for specific licensing purposes.
Furthermore, we continue to conclude that the Model 3 FIR source l 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.
1
REFERENCES:
The following supporting documents for the Model 3F1R source are
- hereby incorporated by reference and are made a part of this registry document
a 3M Health Physics Services' letters dated August 6, 1991, and June 13, 1968, with enclosures thereto
- ANSI Tests - Reclassification Radioactive Sources, Static Control Systems /3M - Test Report dated August 31, 1982
- ISSUING AGENCY
U.S. Nuclear Regulatory Commission Date: January 26, 1996 Reviewer: < . ve,
Dodglas A. Broaddus Date: January 26, 1996 Concurrence: a Steven L. Baggett 1
)
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REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF SEALED SOURCE i
iI NO.: NR-460-S-910-S DATE: January 26, 1996 ATTACHMENT 1 !
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NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001
- ,o February 12, 1996 NOTE T0: MINNESOTA MINING AND MANUFACTURING (3M) INACTIVE FILES FRON: h. )
SUBJECT:
INACTIVATION OF REGISTRATIONS BASED ON AUGUST 6, 1991, LETTER.
A number of the background files for the registration certificates requested I a
(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 l information. Also, 3M was contacted to obtain any additional information that I 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 1 obtained from these sources has been added to the applicable registration l 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 l certificates inactive were based on the information available, the previous t 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 i performed, i
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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 all registration sheets issued to 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,
/3 /
Douglas A. Broaddus, Mechanical Engineer Sealed Source Safety Section Source Containment and Devices Branch Divisien of Industrial and Medical Nuclear Safety, NMSS
Enclosures:
As stated Distribution;.
SSSS R/F NE01 SSD-91-71 Registration certificate files listed in Enclosure 1 DOCUMENT NAME: C:\WPDOCS\SSDS\lNACTIVE\NRC\460INACT. CMP T3 enceive e espy of thee document,Indcate in the box: "C" = Copy without ettechment/ enclosure "E" = Copy with ettschment/ enclosure *N" = No copy 0FFICE SCDB lC l l l l NAME DABroaddus lDATE 02/27/96 OFFICIAL RECORD COPY tl0 -
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d ENCLOSURE 1 REGISTRATIONS TRANSFERRED TO INACTIVE STATUS Old certificate No. New Certificate No. Model Number (s)
NR-459-S-101-S NR-8003-S-801-S 4F6Y NR-459-S-102-S NR-8008-S-802-S 3 FIG NR-460-S-101-S NR-0460-S-875-S 4F6D NR-460-S-102-S COMBINED WITH 4F6H, 4F68
- NR-0460-S-874-S l 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-111-S NR-0460-S-883-S 3MlB NR-460-S-ll2-S NR-0460-S-884-S 3E4G l l NR-460-S-ll3-S NR-0460-S-885-S 4D3A i
- NR-460-S-Il4-S NR-0460-S-886-S 4D3B NR-460-S-Il5-S NR-0460-S-887-S 4D6D NR-460-S-Il6-S NR-0460-S-888-S 4D6F j NR-460-S-Il7-S NR-0460-S-889-S 5FID NR-460-S-Il8-S COMBINED INTO SFIE
~ ~
NR-460-S-119-S 5FIF NR-460-S-120-S NR-0460-S-891-S 5F!G NR-460-S-121-S NR-0460-S-892-S 3L2B
- NR-0460-S-893-S NR-460-S-122-S 3L2A J
NR-460-S-123-S NR-0460-S-894-S 3MIF NR-460-S-124-S NR-0460-S-895-S 3L2C i
a i
l
ENCLOSURE 1 REGISTRATIONS TRANSFERRED TO INACTIVE STATUS Old certificate No. New Certificate No. Model Number (s)
NR-460-S-125-S NR-0460-S-896-S IE2J NR-460-S-126-S NR-0460-S-897-5 3 FIG NR-460-S-127-S NONE - NO INFORMATION 4FIE AVAILABLE NR-460-S-128-S NR-0460-S-899-S 5F1H NR-460-S-129-S NR-0460-S-900-S 3E40 NR-460-S-130-S COM8INED INTO EFIN 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 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, 3E45 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-144-5 COMBINED WITH 4P6M NR-0460-S-872-S NR-460-S-145-5 NR-0460-S-912-S 3 MIL NR-460-S-146-S NR-0460-S-913-S 3G9A NR-460-S-147-S NR-0460-S-914-S 3B4G NR-460-S-148-S COMBINED WITH 4F3F NR-0460-S-871-S NR-460-S-149-S NR-0460-S-915-S 4F3G
ENCLOSURE 1 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-0466-S-919-S 6H6E, 8C9T NR-460-S-155-S COMBINED INTO 406L
~ ~~ ~
NR-460-S-156-S 4D6P NR-460-S-158-S NR-0460-S-921-S 3F11, 3FlJ, 3FIL NR-460-S-159-S NR-0460-S-922-S 3FlV 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-460-5-165-S NR-0460-S-924-S 6701 NR-460-S-166-S NR-0460-S-925-S 6702 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-169-5 NR-0460-S-928-S 6510, 6550, 6570 (FORMERLY 6B6G)
NR-460-S-170-S NR-0460-S-929-S 4P6V NR-460-S-171-S NR-0460-S-930-S 4F6ST
I February 29, 1996 Robert G. Wissink l 3M 11ealth 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 all registration sheets issued to 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, ;
/S /
Douglas A. Broaddus, Mechanical Engineer Sealed Source Safety Section Source Containment and Devices Branch Division of Industrial and Medical Nuclear Safety, NMSS
Enclosures:
As stated Distribution:
SSSS R/F NE01 SSD-91-71 Registration certificate files listed in Enclosure 1 DOCUMENT NAME: C:\WPDOCS\SSDS\ INACTIVE \NRC\460!NACT. CMP T2 seeelve a espy of thee sleeumont,lasscete in the ben: "C" = copy without ettechment/ enclosure *E' = Copy with attachment / enclosure *N" as No copy 0FFICE SCDB lC l l l l NAME DABroaddus DATE 02/27/96 OFFICIAL RECORD COPY f QlnhoMAA tjyuvvva c
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