ML20207G420
| ML20207G420 | |
| Person / Time | |
|---|---|
| Issue date: | 04/27/1999 |
| From: | Samson Lee NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS) |
| To: | Seaman S AFFILIATION NOT ASSIGNED |
| References | |
| SSD, NUDOCS 9906110150 | |
| Download: ML20207G420 (14) | |
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UNITED STATES NUCLEAR REGULATORY COMMISSION o
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WASHINGTON, D.C. 20565 @ 01 DATE:
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OFFICE OF NUCLEAR MATERIAL SAFETY AND SAFEGUARDS DIVISION OF INDUSTRIAL AND MEDICAL NUCLEAR SAFETY FAX TRANSMITTAL TO LOCATION k [ed-(fqsma 1.
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COMMENTS:
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PHONE:
(301) 415-Of7 FAX:
(301) 415-5369 9906110150 990427 PDR
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Please provide the following information to complete your amendment application:
1.
The durability of the laminate 468 adhesive for label.
2.
The rationale that the sources of C-100 and C-200 can be used for C-300.
3.
The C-100 and C-200 source positioning mechanism for transportation.
4.
The third page on your letter dated 3/31/99.
5.
The test conditions and results between C-100, C-200 and C-300 to verify that C-100 and C-200 would survive all the tests performed on C-300.
6.
Verify that the information contained in the enclosed draft registration certificate is complete and accurate. If there are any discrepancies, please mark the changes directly on the certificate and retum the marked up certificate with your response.
i C:\\SJL\\ seaman.df1 April 27,1999
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l REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF DEVICE (AMENDED IN ITS ENTIRETY)
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DRAFT l
NQ1 NR-587-D-104-S DATE:,X PAGE 1 OF 7 l
DEVICE TYPE:
Portable Moisture Density Gauge l
MODEL:
C-100, C-200, C-300 MANUFACTURER / DISTRIBUTOR:
Seaman Nuclear Corporation 7315 South First Street Oak Creek, WI 53154 i
SEALED SOURCE MODEL DESIGNATIQN1 For Model C-300:
Amersham Models: AMN.PE5, AMN.V997, CDC.800 Gammatron Models: AN-HP, GT-GHP Isotope Products Laboratory Model: HEG-137 For Models C-100, C-200, and C-300:
Amersham Models: CDC.804, CDC.805, AMN.6002, AMN.Q1954 Du Pont Merck: NER-550 3M: 4P6M Nuclear Sources and Services: AN-HPG, AN-HP, GT-GHP ISOTOPE:
MAXIMUM ACTIVITY:
Cesium-137 10 mci (370 MBq)
Americium-241/ Beryllium 50 mci (1.85 GBq)
LEAK TEST FREGUENCY:
6 Months PRINCIPAL USE:
(G) Portable Moisture Density Gauges CUSTOM DEVICE:
YES X
NO 1
REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF DEVICE (AMENDED IN ITS ENTIRETY)
DRAFT NO: NR-587-D-104-S DATE: j>~C[
PAGE 2 OF 7 DEVICE TYPE:
Portable Moisture Density Gauge DESCRIPTION:
The Model C-300 is a portable single piece unit, approximately 10" x 10" x 17" (25.4 x 25.4 x 43.2 cm) weighing about 37 pounds (16.8 kg), whereas the Models C-100 and C-200 are 11" x 17" x 14" (28 x 43 x 36 cm) weighing about 45 pounds (20.4 kg). It incorporates a 50 mci (1.85 Gbq) americium-241: beryllium sealed neutron source and an 10 mci (370 MBq) cesium-137 sealed gamma source enabling inspection of materials for moisture content and density.
The cesium-137 source is housed in a lead shield within the device and is rotated 180 between its On and off position.
The j
source remains in the device at all times.
For the Model C-300, the lead shield for the cesium-137 source is held to the base of the meter with four stainless steel studs and tamper rasistant nuts.
For additional strength, a plate is fastened with screws to the top of the shield and to the flange of the base.
For the Models C-100 and C-200, the lead shield is secured to the base with an aluminum bracket.
The bracket is secured to the base with four machine screws, and the lead is secured to the bracket with three self tapping screws.
For all Models, the On-off mechanism, whose status is indicated by the position of the carrying handle, moves the cesium-137 source holder within its stationary shield inside the gauge.
The On-Off mechanism incorporates a 2 to 1 gear ratio which means that turning the handle 90 will rotate the source 180.
When the gauge is not in use, the source holder rests in the shielded position surrounded by lead.
There is no shutter for the americium-241: beryllium source.
The americium-241:bery11ium source is fixed at the gauge bottom in the main lead casting.
l In the optional direct transmission mode, the source remains protected in the instrument housing and only the detector is placed in a probe external to the gauge.
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REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF DEVICE (AMENDED IN ITS ENTIRETY)
DRAFT NO1 NR-587-D-104-S DATE:
2><C_
PAGE 3 OF 7 DEVICE TYPE:
Portable Moisture Density Gauge DESCRIPTION (Cont'd):
The C-100, C-200, and C-300 are designed so that the source positioning mechanism must be in the Off position for the gauge to be transported.
To accomplish this, the shielding mechanism is returned to the off condition by lifting the handle from either of its two operating positions.
Approximately 3 foot-pounds (0.41 m-kg) of torque is required to overcome the positioning detent in the On condition.
Lifting the gauge by its handle, which is horizontal in the on condition, applies 27 foot-pounds (3.73 m-kg) of torque.
Lifting of the gauge by the handle will return the gauge to the off condition.
Epoxy is used to retain-the sources within their holders.
This epoxy is insoluble in water and most common solvents.
Seaman has indicated there have been no epoxy failures in either the 20 year history of this type of gauge nor in the 35 years of Seaman Nuclear products.
The source holders must be heated to 600*F (316"C), a temperature that melts the lead in the source holder, to release the source.
Seaman has demonstrated that the epoxy will withstand exposure to radiation experienced during the life of the device. However, even if the epoxy were to fail, the sources would remain in the housing due to the design of the shielding for the cesium-137 and americium-241: beryllium The top half of the device (electronic portion) is removable.
For the Model C-300, there are two optional safety features: (a) the locking cable to keep the source sealed when the electronics portion is removed and (b) the tamper-resistance hardware.
A plate, held in place by tamper-resistant hardware, restricts assess to the lower half of the unit.
A label on this plate s
indicates that the plate should not be removed and provides instructions for how to lock the shutter mechanism when the top is removed.
The Models C-100 and C-200 are of similar design to the Model C-300.
.The only differences between the devices are overall dimensions, dimensions of some parts, and other minor differences internal to the device.
l REGISTRY OF RADIQACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF DEVICE (AMENDED IN ITS ENTIRETY)
DRAFT HQ1 NR-587-D-104-S DATE:,25<C PAGE 4 OF 7 DEVICE TYPE 1 Portable Moisture Density Gauge LABELING:
The device is labeled in accordance with 10 CFR 20.1901.
Specifically, a label is adhered to the front of the lower section of the device and includes the device model number, serial, isotopes, activities, dates of assay, the trefoil symbol, and the words " Caution - Radioactive Material."
In addition, the device labeling identifies Seaman Nuclear.
When the top portion of the device (electronics) is removed, the statement "DO NOT DISASSEMBLE BEYOND THIS POINT." is labeled on all Models.
For Model C-300 only, two labels are visible, one indicates how the user is to lock the handle / source in the closed
- position, The on and Off position of the cesium-137 source is indicated by the position of the handle.
For the Model C-300, there are figures next to the device read out that indicate the source condition based on the position of the handle.
DIAGRAM:
See attachments 1 through 4.
CONDITIONS OF NORMAL USE:
The devices are designed for use under conventional field construction and testing conditions, including environmental ranges from 0 to 100% relative humidity, ambient temperatures -20 to 60 C (-4 to 14 0* F), and with the base in contact with material up to 191*C (376*F).
I 1
PROTOTYPE TESTING:
A prototype of the Model C-300 was subjected to and passed the f
following tests.
Based on design similarities, it is expected I
that the Models C-100 and C-200 would withstand the same testing.
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REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF DEVICE (AMENDED IN ITS ENTIRETY)
DRAFT NO: NR-587-D-104-S DATE: ]?><C_
PAGE 5 OF 7 DEVICE TYPE:
Portable Moisture Density Gauge PROTOTYPE TESTING (Cont'd):
Cold Cycle:
Eight hours at -12 C (10. 4 F).
I Hot Cyclei Eight hours at 63*C (14 5*F).
Thermal Shock: Hot (63"C (145*F]) and cold (-12*C (10.4 F])
environments were established.
The device was subjected to the hot environment for 4 hour4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> and
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then transferred to the cold environment for 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br />.
Then, the device was subjected to the cold environment for 4 hour4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> and then transferred to the hot environment for 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br />.
Hot Surface:
A 191*C (376*F) surface was established. The device was placed on the surface for 20 minutes and then allowed to cool to ambient (20*C [68 F]).
The device was then cycled, 6 times, between the 191"C (376*F) surface for 5 minutes and an ambient surface for 5 minutes.
Vibration:
Device was fastened to a vibratory test fixture for 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. The frequency was 12.5 Hz and the amplitude was 0.125" (0.3 cm) in one two directions and 0.018" (0.46 mm) in the other direction.
The device was rotated after 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />.
Dron Test:
Dropped onto an asphalt surface from 1 m (3.3').
Also dropped 5 times onto a 1" (2.54 cm) diameter steel ball from a height of l' (30.5 cm).
EXTERNAL RADIATION LEVELS:
The following table includes the maximum combined gamma and neutron dose rates for a Model C-300, containing 10 mci of cesium-137 and 50 mci of americium-241/ beryllium, including the location and gauge mode.
Dose rates for the Models C-100 and C-200 would be lower than those listed in the Attachment 2.
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REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF DEVICE (AMENDED IN ITS ENTIRETY) l DRAFT l
HQ.1, NR-587-D-104-S DATE:
PAGE 6 OF 7 l
DEVICE TYPE:
Portable Moisture Density Gauge j
OUALITY ASSURANCE AND CONTROL:
Seaman Nuclear Corporation maintains a quality assurance and control program which has been deemed acceptable for licensing purposes by NRC. A copy of the program is on file with NRC.
LIMITATIONS AND/OR OTHER CONSIDERATIONS OF USE:
The devices shall be distributed to specific licensees of the NRC or Agreement States.
The device shall be leak tested at intervals not to exceed 6 months using techniques capable of detecting 0.005 mci (185 Bq) of removable contamination.
Handling, storage, use, transfer, and disposal: To be determined by j
the licensing authority.
This registration sheet and the information contained within the references shall not be changed without the written consent of the NRC.
l l
S_AFETY ANALYSIS
SUMMARY
Based on review of the Models C-100, C-200, and C-300 and the i
information and test data cited below, we conclude that the devices are acceptable for licensing purposes.
Furthermore, we conclude that the devices would be expected to maintain their integrity for normal conditions of use and accidental conditions which might occur during uses specified in l
this certificate.
RE FERENCES :
The following documents for the Models C-100, C-200,and C-300 portable moisture density gauges are hereby incorporated by reference and are made a part of this registration certificate:
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REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF DEVICE (AMENDED IN ITS ENTIRETY)
DRAFT NO: NR-587-D-104-S DATE:
PAGE 7 OF 7 DEVICE TYPE:
Portable Moisture Density Gauge REFERENCES (Cont'd):
Seaman Nuclear Corporation's letters dated March 31, 1999, March 30, 1999, October 8, 1998, September 16, 1998, July 31, 1998, June 1, 1998, December 30, 1997, and December 23, 1997, with enclosures thereto.
ISSUING AGENCY:
U.S. Nuclear Regulatory Commission
~
Date:
Reviewer:
Date:
Concurrence:
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REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF DEVICE (AMENDED IN ITS ENTIRETY)
DRAFT NO: NR-587-D-104-S DATE:
K ATTACHMENT 1 L.
REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF DEVICE (AMENDED IN ITS ENTIRETY)
DRAFT N_Q1 NR-587-D-104-S DATE:
ATTACHMENT 2 Dose Rate for Model C-300 Distance Side Gauge Mode Contact 30 cm (0.98")
1m (3.3')
Front Shielded 10.1 1.7 0.4 Touchable 16.4 1.9 0.6 Untouchable 17.5 2.2 0.5 Air Gap 71.0 2.6 0.7 Back Shielded 11.8 1.8 0.3 Touchable 17.8 2.4 0.3 I
Untouchable 20.1 2.5 0.4 Air Gap 75.9 2.8 0.5 Right Shielded 17.1 1.6 0.3 l
Touchable 24.1 2.6 0.5 Untouchable 24.1 2.8 0.5 Air Gap 35.7 2.9 0.6
'Left Shielded.
2.7 0.9 0.2 Touchable 2.8 0.7 0.2 l
Untouchable 3.1 0.7 0.2 l
Air Gap 3.6 0.9 0.2 l
I Top Shielded 6.1 1.4 0.2 Touchable 2.0 0.5 0.2 l
Untouchable 2.0 0.6 0.2 Air Gap 2.0 0.7 0.2 l
i Top of Shielded 36.6 3.3 0.3 Base Touchable 7.3 1.7 0.2 Untouchable 7.6 1.7 0.2 Air Gap 6.3 1.8 0.3 Bottom Shielded 16.1 2.3 0.5 Touchable 25.5 2.9 Untouchable 25.5 2.9 Air Gap 25.5 2.9 Values are mrem /hr.
- In beam rate on contact was not measured.
Shielded: gauge in off condition.
i Touchable: gauge is resting on surface of a concrete block.
Untouchable: gauge is raised approximately 0.2" (0.5 cm) above surface.
Air Gap: gauge is raised approximately 2" (5.1 cm) above surface.
i Top of Base: top of the lower half, electronic portion is removed.
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REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF DEVICE (AMENDED IN ITS ENTIRETY)
DRAFT
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NO: NR-587-D-104-S DATE: M ATTACHMENT 3 Radiation Levels in mrem for C-100 and C-200 4
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REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF DEVICE (AMENDED IN ITS ENTIRETY)
DRAFT NO: NR-587-D-104-S DATE: K ATTACHMENT 4 Radiation Levels in mrem for C-300 4
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TRANSMISSION REPORT 04.27.1999 08:30 301 415 5369 DATE TIME DURATION REMOTE ID MODE PAGES RESULT 04.27 08:24 06'19" 414 762 5106 ECM 13 0.V.
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