ML20199D660
| ML20199D660 | |
| Person / Time | |
|---|---|
| Issue date: | 06/24/1992 |
| From: | Steven Baggett NRC |
| To: | |
| Shared Package | |
| ML20199D627 | List: |
| References | |
| SSD, NUDOCS 9801300258 | |
| Download: ML20199D660 (9) | |
Text
..
REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF SEALED SOURCE (Amended in its Entirety)
HQ2:
NR-187-S-101-S DATE:
June 24, 1992 PAGE 1 OF 7 SOURCE TYPE:
Brachytherapy Seed. Source MODEL:
81-01 MANUFACTURER / DISTRIBUTOR:
Best Industries 7643 Fullerton Rd.
Springfield, VA 22153 ISOTOPE:
MAXIMUM ACTIVITY:
L Iridium-192 33 millicuries (1.22 GBq) i l
I LEAK TEST FREOUENCY:
6 months PRINCIPAL USE:
(V) General Medical Use CUSTOM SOURCE:
YES x
NO 9901300258 900113 PDR RC
\\'
ft, y
.SSD PDR
3 REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF SEALED SOURCE (Amended 17 its Entirety) i HQ2:
NR-187-S-101-S DATE:
June 24, 1992 PAGE 2 OF 7 SOURCE TYFE:
Brachytherapy Seed Source DESCRIPTION:
Best Industries claims that the Model 81-01 sources are identical in design and construction to RAD / IRID, Inc., Model R/1 sources and other sources which have been in use since 1960.
Each seed contains Iridium 30% - Platinum 70% alloy source material in the form of a wire doubly encapsulated in Type 304 stainless steel.
The capsules are cold nelded at each end (machine crimped) to a nominal length of 0.13 inches (3 mm).
Nominal outer diameter for the Iridium / Platinum wire is 0.003 inches (0.076 mm).
Nominal outer diameter of the inner stainless steel capsule is 0.012 inches (0.305 mm) with a nominal thickness of 0.0085 inches (0.216 mm).
Nominal outer diameter of the outer stainless steel capsule is 0.020 inches (0.508 mm) with a nominal thickness of 0.007 inches (0.178 mm).
Following batch irradiation in a reactor, the completed seeds are forced into nylon ribbons which have an inner diameter less than the outer diameter of the sources in order to prevent movement.
Spacing of the sources along the ribbon is typically 0.4 inches (1 cm) center to center, however, up to 3 seeds per centimeter can be accommodated.
Each ribbon will be supplied with approximately 39.4 inches (100 cm) of inactive leader at one end to facilitate handling and about 1.2 inches (3 cm) on the other.
Seeds and ribbons are supplied in sets.
A standard set consists of 14 ribbons containing 12 seeds each with 1 cm spacing.
Ribbons can be customized with up to 7.9 inches (20 cm) of active length according to user specifications.
The most commonly supplied activity is 10 millicuries per seed, however, the user may request up to 71 millicuries (1.11 GBq) per seed.
DIAGRAM:
See attachments 1 and 2.
LABELING:
Because of their small size, individual seeds and ribbons are not labeled but rather, each shipping container will be labeled.
Additionally, ribbons may be color coded to designate various activity levels as of the date of shipment.
However, color selection is not dependent upon a specific activity level.
I
REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF SEALED SOURCE (Amended in its Entirety)
.HQt:
NR-187-S-101-S DATE:
June 24, 1992 PAGE 3 OF ?
SOURCE TYPE:
Brachytherapy Seed Source LABELING: (Cont'd)
Seeds in ribbons are supplied as a set with the activity of each ribbon within a range as specified by the end user.' The shipping containers for each set bear labels containing the following:
" CAUTION - RAD!OACTIVE MATERIAL" Radiation Symbol, Isotope, Amount, Date Best Industries, Inc.
7643-B Fullerton Road Springfield, VA 22133 Ship To:
.Date of Shipment P.O. Number Activity on Date of
- of Ribbons
- of Seeds Shioment (ma Raeal Code
- Color **
Note: '*
Internal code to identify reactor irradiated batch of seeds.
Ribbons may be color coded to designate the activity on date of shipment (milligram radium equivalent).
Typical colors used are white, red, or blue.
For seeds above 11 mci (0.407 GBq) the following label will be added:
CAUTION:
These Iridium-192 seeds are considered high activity sources because of the high dose rate.
The dose rate per mci of Iridium-192 seeds at 1 cm is 4.6 R/hr.
At 5 cm the dose rate is 184 mR/hr.
At 30 cm the dose rate is 5.1 mR/hr and at 100 cm it is 0.46 mR/hr.
Use extra care and follow all instructions included in the bill of lading.