ML20206A042
| ML20206A042 | |
| Person / Time | |
|---|---|
| Issue date: | 08/28/1998 |
| From: | Steven Baggett, John Lubinski NRC |
| To: | |
| Shared Package | |
| ML20137M141 | List: |
| References | |
| SSD, NUDOCS 9904280040 | |
| Download: ML20206A042 (12) | |
Text
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REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF DEVICE NO,: NR-186-D-117-G DATE: PAGE 1 OF 9 AllG p p' g DEVICE TYPE: Gamma Gauge MODEL: NW-201 Series, NW-301 Series, NW-401 Series MANUFACTURER / DISTRIBUTOR: Berthold Systems, Inc.
Hopewell Business Park 101 Corporation Drive Aliquippa, PA 15001 SEALED SOURCE MODEL DESIGNATION: Berthold Systems, Inc.: 39002 ISOTOPE: MAXIMUM ACTIVITY:
Cesium-137 900 microcuries (33.3 MBq)-
no single source to exceed 10 microcuries (370 kBq)
LEAK TEST FREOUENCY: Not Required PRINCIPAL USE: (D) Gamma Gauge CUSTOM DEVICE: YES X NO I
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4 e REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF DEVICE NO,; NR-186-D-117-G DATE: Ayg 2 81333 PAGE 2 OF 9 DEVICE TYPE: Gamma Gauge DESCRIPTION:
The Model NW-201 Series, NW-301 Series, and NW-401 Series source housings are designed to be installed in fixed locations to measure material density or fill level in various applications including pipelines, tanks, and other containers or flow processes. Each source housing contains multiple sources, each' source Containing Do more than 10 microcuries (370 kBq) . The multiple sources are installed into machined " pockets" and are held in place by epoxy. Descriptions of each source housing are listed below.
NW-201 S'eries The Model NW-201 Series source housings have variable dimensions ranging from 5-8" (12.7-20.3 cm) in diameter and 2-6" (5.1-15.2 cm) in height. The construction of the source housing is either lead or tungsten shielding sandwiched between stainless steel plates.
In its shipping condition, the source housing has the source sandwiched between two halves of the shielding. However, upon installation, one half of the shielding (the removable shipping cap) is removed and installed on the back of the other half of the shielding. This condition will expose the radiation. beam while providing additional shielding at the back of the source housing. The source housing does not have a shutter mechanism.
To ensure that the dose rates at the accessible surfaces of the applications do not exceed 2 mrem /hr (20 pSv/hr) , installation of the Model NW-201 Series source housings are subject to the following:
Pipes:
- no smaller than 4" (10.2 cm) diameter, schedule 40 pipe under any conditions.
- no smaller than 10" (25.4 cm) diameter, schedule 40 pipe when containing more than 300 microcuries (11.1 MBq).
e no smaller than 14" (35.6 cm) diameter, schedule 40 pipe l when containing more than 500 microcuries (18. 5 MBq) .
Vessels:
e no smaller than 14" (35.6 cm) diameter, schedule 40 pipe under any conditions.
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l REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF' DEVICE NO , t NR-18 6-D-117-G AUG 2 815B '
DATE: PAGE 3 OF 9 DEVICE TYPEi Gamma Gauge DESCRIPTION (Cont . ) :
NW-301 Series The Model.NW-301 Series source housings have variable dimensions ranging from 12-60" (30.5-152.4 cm) in length, 1-4" (2.5-10.2 cm) in height, and 2-6" (5.1-15.2 cm) in width. The construction of the-source housing is either solid tungsten or lead encased in steel. Upon' installation, the Pousing acts similar to a strip source. mounted on the side of a vessel. The source housing does not-have a shutter mechanism. In its shipping condition, the source housing is " folded" in half so that the beam ports of the two' halves are facing each other.
To ensure that the dose rates at the accessible surfaces of the applications do not exceed 2 mrem /hr (20 pSv/hr), Model NW-301 Series source housings may only contain up to 300 microcuries (11.1 MBq) of cesium-137.
NW-401 Series The Model NW-401 Series source housings have variable dimensions with a minimum diameter of 2.5 (6.4 cm) and minimum height of 2.5" (6.4 cm). The source housing is constructed of tungsten with a machined area that would~ allow for' mounting to a pipe.
The radius of the machined area is the same as the pipe to which it will be attached. The sources are mounted in the center of the cylindrical construction.
In its shipping condition, a source is installed in the machined i area to provide shielding. However, upon installation, the source cap is removed. The source housing does not have a shutter mechanism.
l To ensure that the dose rates at the accessible surfaces of the applications do not exceea 2 mrem /hr (20 pSv/hr) , Model NW-401 Series ~ source housings may only contain up to 300 microcuries (11.1 MBq) of cesium-137 and may be attached to pipes with a
-minimum diameter of 2" (5.1 cm).
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L
e REGISTRY OF RADIOACTIVE. SEALED SOURCES AND DEVICES SAFETY EVALUATION OF DEVICE NO : NR-186-D-117-G DATE: 28 O PAGE 4 OF 9 DEVICE TYPE: Gamma Gauge DESCRIPTION (Cont.):
39002 Source The-Berthold 39002 source is registered as part of this source housing and is not registered separacely. The 39002 source is 0.375" .(1.0 cm) in diameter by 0.008-0.009" (0. 2 0-0. 23 mm) thick and may contain up to 10 micro' curies (370 kBq) of cesium-137.
The source is not manufactured by Berthold Systems but must be manufactured to Berthold's specifications.
Since no single source used in the source housings exceeds 10 microcuries (370 kBq), leak testing of the source housings is not required. f LABELING:
The source housings are labeled in accordance with 10 CFR 20.1901 and 10 CFR 32.51.
The source housing serial number is engraved into each source housing. A stainless label, either attached to the source
! housings by rivets or a stainless steel tether, will be engraved with the source housing model number, isotope, activity, date of l
assay, the radiation symbol, and the name and telephone number of the distributor. In addition, it will contain the following i
. wording:
L Abandonment or disposal prohibited unless transferred to Berthold Systems, or t
persons specifically licensed by the U.S. Nuclear Regulatory Commission or an Agreement State. Operation prohibited if there is indication of failure of or damage to housing or source containment. Installation and relocation can only be performed l using the specific instructions suppled in the operating manual of the device.
l Dismantling, maistenance, repair and testing involving the radioactive material, its
' housing or containment shall be perform by Berthold Systems, Inc. and other specific licensees. The device is not required to be tested for radioactive leakage. Loss, theft, or transfer of this device and failure of or damage to the shielding and source l containment must be reported to Berthold Systems, Inc. and the U.S. Nuclear l Regulatory Commission or an Agreement State. The receipt, possession, use, and .
I transfer of the device are subject to a general license or the equivalent and the !
regulations of the U.S. NRC or of a State with which the NRC has entered into an agreement of the exercise of regulatory authority. This label shall be maintained on the device in a legible condition. Removal of this label is' prohibited. This device is registered with the U.S. Nuclear Regulatory Commission.
CAUTION - RADIOACTIVE MATERIAL
n-REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF DEVICE NO,: NR-186-D-117-G DATE: 0 2 8 1993 PAGE 5 OF 9 DEVICE TYPE: Gamma Gauge LABELING (Cont.):
The source housing labeling is exempt from the conventional color requirements of 10 CFR 20.1901.
DIAGRAM:
See attachments 1-3.
CONDITIONS OF NORMAL USE:
The source housings will be used in industrial applications to measure material density or fill level in various applications including pipelines, tanks, and other containers or flow l processes. Possession and use of the source housings is i restricted to environments that do not exceed the following i conditions:
Temperature: -25 to 100 C (-13 to 212 F)
Unlikely to be subjected to thermal shock Humidity: 0 to 100%
Impact: Cannot be mounted at heights exceeding 30 feet (7.6 m).
External Pressure: 3.6 psi to 1 atmosphere Vibration: Low - simple harmonic motion having a maximum amplitude of 0.03" (0.76 mm) and maximum frequency of 50 Hz.
Corrosion: Slight - i.e., low concentrations of corrosive fumes / chemicals.
Fire and Explosion: Environments where fire and explosion are unlikely.
l
I REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF DEVICE NO,: NR-186-D-117-G DATE: PAGE 6 OF 9 ggg REVICE TYPE: Gamma Gauge PROTOTYPE TESTING:
Prototypes of the source housings were constructed and subjected to the tests listed below. No malfunction occurred nor was there any loss of shielding or containment integrity as a result of the testing.
Temperature. Cycle testing from -25"C to 100'C (-13 to 212'F).
Held at 538"C (1000*F) for 5 minutes. ;
Humidity 100% at 50*C (122*F) for 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> Impact Drop from 30 feet' (7.6 m).
The sealed source was tested as part of the source housings.
No information was submitted concerning prototype testing of the sources when not installed in the source. housings.
EXTERNAL RADIATION LEVELS:
Berthold has committed to verify that the dose rates at the surface of each source' housing will not exceed 0.5 mrem /hr (5 Sv/hr), except at the surface of the beam port, which will not exceed 100 mrem /hr (1 mSv/hr). In addition, Berthold has demonstrated that the dose rates on all accessible surfaces of thu: installation will not exceed 2 mrem /hr (20 Sv/hr) .
-OUALITY ASSURANCE AND CONTROL:
Berthold 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 the NRC.
LIMITATIONS AND/OR OTHER CONSIDERATIONS OF USE:
- The device shall be distributed to persons generally licensed by the NRC or an Agreement State.
- Devices users are not subject to leak testing requirements.
y REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF DEVICE NO.: NR-186-D-117-G DATE: XUG 28158 PAGE 7 OF 9 DEVICE TYPE: Gamma Gauge LIMITATIONS AND/OR OTHER CONSIDERATIONS OF USE (Cont.)-
- Handling, storage, use, transfer, and disposal: as required by 10 CFR 31.5 or Agreement State equivalent.
- The device labeling is exempt from the conventional color requirements of 10 CFR 20.'1901.
- General _ licensees may install the devices provided the installation is in accordance with the instructions _provided by Berthold Systems, Inc. However, general licensees may not perform any other type of servicing of the devices.
- This registration sheet and the information contained within the references shall not be changed without the written consent of the NRC.
SAFETY ANALYSIS
SUMMARY
Berthold has submitted sufficient information to provide reasonable assurance that:
-* The device'can be safely operated by persons not having training in radiological protection.
- Under ordinary conditions of handling, storage, and use of the device, the byproduct material contained in the device will not be released or inadvertently removed from the source housing, and it is unlikely that any person will receive in any period of one year a dose in excess of 10 percent of the limits specified in Section 20.1201(a),
- Under accident conditions associated with handling, storage, and use of the source housing, it is unlikely that any person would receive an external radiation dose or dose commitment in excess of the dose to the appropriate organ as specified in the following chart:
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l REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES l
SAFETY EVALUATION OF DEVICE NO.- NR-186-D-117-G DATE.
7gg PAGE 8 OF 9 DEVICE TYPE: Gamma Gauge SAFETY ANALYSIS
SUMMARY
(Cont.):
PART OF BODY DOSE Whole body; head and trunk; active blood-forming organs; gonads; or lens of eye 15 rem (0.15 Sv)
Hands and forearms; feet and ankles; localized arecs of skin averaged over areas no larger than 1 cm2 (0.15 in 2) 200 rem (2.0 Sv) J Other organs 50 rem (0.50 Sv) 1 Based on review of the Models NW-201 Series, NW-301 Series, and }
NW-401 Series source housings, and the information and test data !
cited below, we conclude that the source housing is acceptable i for licensing purposes.
Furthermore, we conclude that the source housing would be expected to maintain it's containment integrity for normal conditions of use and accidental conditions which might occur during uses specified in this certificate.
l
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REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF DEVICE NO,: NR-186-D-117-0 DATE: 108 2 8 1998 PAGE 9 OF 9 DEVICE J'YPE: Gamma Gauge REEERENCES:
The following supporting. documents for the Model NW-201 Series, NW-301 Series, NW-401 Series source housings are hereby incorporated by reference and are made a part of this registry document.
- Berthold Systems' letters' dated August 25, 1998, August'21, 1998, July 29, 1998, and July 2, 1998, with enclosures theretc
- Berthold Systems' fasimile dated August 25, 1998, with enclosures thereto.
ISSUING AGENCY-U.S. Nuclear Regulatory Commission
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Z 8 f]f$ A Date: Reviewer: . FV ^
/ dohn W Lubinski Date: Concurrence: M tteven L7 Baggett
REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF DEVICE 0
NO.: NR-186-D-117-G DATE: ATTACHMENT 1
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REGISTRY OF RADI0 ACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF DEVICE h NR-186-D-117-G DATE: 2 8 1993 ATTACHMENT 3 p 2.50 MIN.q 4 4 SOURCE PDCKET w ,-
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i REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF DEVICE NO.: NR-186-D-117-G DATE: AUGpp5;gg PAGE 1 OF 9 i DEVICE TYPE: Gamma Gauge MODEL: NW-201 Series, NW-301 Series, NW-401 Series MANUFACTURER / DISTRIBUTOR: Berthold Systems, Inc.
Hopewell Business Park 101 Corporation Drive Aliquippa, PA 15001 SEALED SOURCE MODEL DESIGNATION: Berthold Systems, Inc.: 39002 ISOTOPE: MAXIMUM ACTIVITY 1 ;
1 Cesium-137 900 microcuries (33.3 MBq) j l no single source to exceed 10 microcuries (370 kBq) )
l l
1 l LEAK TEST FREOUENCY: Not Required PRINCIPAL USE: (D) Gamma Gauge CUSTOM DEVICE: YES X NO o . ! ,)
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REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF DEVICE NO.: NR-186-D-117-G DATE: Ayg 2 81933 PAGE 2 OF 9 DEVICE TYPE: Gamma Gauge DESCRIPTION:
l The Model NW-201 Series, NW-301 Series, and NW-401 Series source
! housings are designed to be installed in fixed locations to measure material density or fill level in various applications l including pipelines, tanks, and other containers or flow
. processes. Each source housing contains multiple sources, each
[ source containing no more than 10 microcuries (370 kBq). The multiple' sources are-installed into machined " pockets" and are held-in place by epoxy. Descriptions of each source housing are listed below.
L
- NW-201 Series l
'The Model NW-201 Series source housings have variable dimensions ranging from 5-8" (12.7-20.3 cm) in diameter and 2-6" (5.1-15.2 cm) in height. The construction of the source housing is either lead or tungsten shielding sandwiched between stainless steel plates.
In.its shipping condition, the source housing has the source l sandwiched between two halves of the shielding. However, upon
! installation, one half of the shielding (the removable shipping cap) is removed and installed on the back of the other half of the shielding. This' condition will expose the radiation beam
-while providing additional shielding at the back of the source housing. The source housing does not have a shutter mechanism.
To ensure that the dose rates at the accessible surfaces of the applications do not exceed 2 mrem /hr (20 pSv/hr), installation of the Model NW-201 Series source housings are subject to the l following:
1 Pipes: . _
l
- no smaller than 4" (10.2 cm) diameter, schedule 40 pipe I under any conditions.
l o'no smaller than 10" (25.4 cm) diameter, schedule 40 pipe I when containing more than 300 microcuries (11.1 MBq) .
- -no smaller thau 14" (35.6 cm) diameter, schedule 40 pipe when containing more than 500 microcuries (18.5 MBq).
Vessels:
e no smaller than 14" (35.6 cm) diameter, schedule 40 pipe under any conditions..
REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF DEVICE F?ti NR-186-D-117-G DATE: PAGE 3 OF 9 DEVICE TYPE: Gamma Gauge DESCRIPTION (Cont.)-
NW-301 Series The Model NW-301 Series source housings have variable dimensions ranging from 12-60" (30.5-152.4 cm) in length, 1-4" (2.5-10.2 cm) in height, and 2-6" (5.1-15.2 cm) in width. The construction of the source housing is either solid tungsten or lead encased in steel. Upon installation, the housing acts similar to a strip source mounted on the side of a vessel. The source housing does not have a shutter mechanism. In its shipping condition, the source housing is " folded" in half so that the beam ports of the two halves are facing each other.
To ensure that the dose rates at the accessible surfaces of the applications do not exceed 2 mrem /hr (20 pSv/hr) , Model NW-301 Series source housings may only contain up to 300 microcuries (11.1 MBq) of cesium-137.
NW-401 Series The Model NW-401 Series source housings have variable dimensions with a minimum diameter of 2.5 (6.4 cm) and minimum height of l 2.5" (6.4 cm). The source housing is constructed of tungsten j with a machined area that would allow for mounting to a pipe. J The radius of 'che machined area is the same as the pipe to which it will be attached. The sources are mounted in the center of the cylindrical construction.
In its shipping condition, a source is installed in the machined area to provide shielding. However, upon installation, the source cap is removed. The source housing does not have a shutter mechanism.
To ensure that the dose rates at the accessible surfaces of the applications do not exceed 2 mrem /hr (20 pSv/hr) , Model NW-401 Series source housings may only contain up to 300 microcuries (11.1 MBq) of CeFium-137 and may be attached to pipes with a minimum diameter of 2" (5.1 cm).
r REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF DEVICE NO,: NR-186-D-117-G DATE: UG 2 81998 pagg 4 op 9 DEVICE TYPE: Gamma Gauge j DESCRIPTION (Cont.)-
39002 Source The Berthold 39002 source is registered as part of this source housing and is not registered separately. The 39002 source is 0.375" (1.0 cm) in diameter by 0.008-0.009" (0.20-0.23 mm) thick and may contain up to 10 microcuries (370 kBq) of cesium-137.
The source is not manufactured by Berthold Systems but must be manufactured to Berthold's specifications.
Since no single source used in the source housings exceeds 10 microcuries (370 kBq) , leak testing of the source housings is not required.
LABELING:
The source housings are labeled in accordance with 10 CFR 20.1901 and 10 CFR 32.51.
The source housing serial number is engraved into each source housing. A stainless label, either attached to the source housings by rivets or a stainless steel tether, will be engraved with the source housing model number, isotope, activity, date of assay, the radiation symbol, and the name and telephone number of i the distributor. In addition, it will contain the following l wording:
l Abandonment or disposal prohibited unless transferred to Berthold Systems, or
- persons specifically licensed by the U.S. Nuclear Regulatory Commission or an l Agreement State. Operation prohibited if there is indication of failure of or damage to housing or source containment. Installation and relocation can only be performed using the specific instructions suppled in the operating manual of the device.
Dismantling, maintenance, repair and testing involving the radioactive material, its housing or containment shall be perform by Berthold Systems, Inc. and other specific licensees. The device is not required to be tested for radioactive leakage. Loss, theft, or transfer of this device and failure of or damage to the shielding and source containment must be reported to Berthold Systems, Inc. and the U.S. Nuclear Regulatory Commission or an Agreement State. The receipt, possr lion, use, and transfer of the device are subject to a general license or the equivalent and the regulations of the U.S. NRC or of a State with which the NRC has entered into an agreement of the exercise of regulatory authority. This label shall be maintained on the device in a legible condition. Removal of this label is prohibited. This device is registered with the U.S. Nuclear Regulatory Commission.
t CAUTION - RADIOACTIVE MATERIAL I
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1 REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF DEVICE NO.: NR-186-D-117-G DATE: 0 2 8 $% PAGE 5 OF 9
.. DEVICE TYPE: Gamma Gauge
' LABELING (Cont.):
.The source housing labeling is exempt from the conventional: color requirements'of 10 CFR 20.1901.
DIAGRAM:
See attachments 1-3.
l CONDITIONS OF NORMAL USE:
(
l The source housings will be used in industrial applications to l measure material. density or fill level'in various applications j
including pipelines, tanks, and other containers or flow processes. Possession and use of the source housings is restricted to environments that do not exceed the following conditions:
Temperature: -25 to 100*C (-13 to 212'F)
Unlikely to be subjected to thermal shock
' Humidity: 0 to 100%
Impact: Cannot be mounted at heights exceeding 30 feet.(7.6 m).
External l Pressure: 3.6 psi to 1 atmosphere
-Vibration: Low - simple harmonic motion having a maximum amplitude of 0.03" (0.76 mm) and l maximum frequency of 50 Hz. !
Corrosion: Slight - i.e., low concentrations of corrosiv.e fumes / chemicals.
Fire and Explosion: . Environments where fire and explosion are unlikely.
l 1
REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF DEVICE NO,: NR-186-D-117-G DATE: PAGE-6 OF 9 rAUG 2 8 tD8 DEVICE TYPE: Gamma Gauge
' PROTOTYPE TESTING:
Prototypes of the source housings were constructed and subjected to the tests listed below. 'No malfunction occurred nor was there any loss of shielding or containment integrity as a result of the testing.
Temperature Cycle testing from -25 C.to 100"C (-13-to 212
- F) .
Held at 538 C (1000*F) for.5 minutes.
Humidity 100% at 50"C (122 F) for 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> Impact- Drop from 30-feet (7.6 m).
The sealed source was tested as part of the source housings.
No information was submitted concerning prototype testing of the sources when not installed in the source housings.
l EXTERNAL RADIATION LEVELS:
l . Berthold has committed to verify that the dose rates at the l surface of each source housing will not exceed 0.5 mrem /hr i
(5 Sv/hr), except at the' surface of the beam port, which will not exceed 100 mrem /hr (1 mSv/hr). In addition, Berthold has
! demonstrated that the dose rates on all accessible-surfaces of the installation will not exceed 2 mrem /hr (20 Sv/hr).
OUALITY ASSURANCE AND CONTROL:
(
l Berthold 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 the NRC.
LIMITATIONS AND/OR OTHER CONSIDERATIONS OF USE:
1
- The device shall be distributed to persons generally !
' licensed by the NRC or an Agreement State. I
- nDevices users are not subject to leak testing requirements.
(
L.
REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF DEVICE NO : NR-186-D-117-G DATE: SUG 2 8 TB8 PAGE 7 OF 9 DEVICE TYPE: Gamma Gauge LIMITATIONS AND/OR OTHER CONSIDERATIONS OF USE (Cont . ) -
- e. Handling, storage, use, transfer, and disposal: as required by 10 CFR 31.5 or Agreement State equivalent.
- The device labeling is exempt.from the conventional color requirements of 10 CFR 20.'1901.
- General licensees may' install the devices provided the installation is-in accordance with the instructions provided by Berthold Systems, Inc. However, general licensees may not perform any other type of servicing of the devices.
- This registration sheet and the information contained within the references shall not be changed without the written consent of the NRC.
SAFETY ANALYSIS
SUMMARY
Berthold has submitted sufficient information to provide reasonable assurance that:
- The device can be safely operated by persons not having training in radiological protection.
- Under ordinary conditions of handling, storage, and use of the device, the byproduct material contained in the device will not be released or inadvertently removed from the source housing, and it is unlikely that any person will receive in any period of one year a dose in excess of 10 percent of the limits specified in Section 2 0.12 01 (a) ,
' Under accident conditions associated with handling, storage, and use of the source housing, it is unlikely that any person would receive an external radiation dose or dose commitment in excess of the dose to the appropriate organ as specified in the following chart:
l
REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF DEVICE NO,: NR-186-D-117-G DATE: PAGE 8 OF 9 7gg DEVICE TYPE: Gamma Gauge SAFETY ANALYSIS
SUMMARY
(Cont.):
PART OF BODY DOSE Whole body; head and trunk; active blood-forming organs; gonads; or lens of eye 15 rem (0.15 SV)
Hands and forearms; feet and ankles; localized areas of skin averaged over areas no larger than 1 cm2 (0.15 in') 200 rem (2.0 Sv)
Based on review of the Models NW-201 Series, NW-301 Series, and NW-401 Series source housings, and the information and test data cited below, we conclude that the source housing is acceptable for licensing purposes.
Furthermore, we-conclude that the source housing would be expected to maintain it's containment integrity for normal conditions of use and accidental conditions which might occur during uses specified in this certificate.
4 .
REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF DEVICE NO.: NR-186-D-117-G DATE: kNO 2 815$8 PAGE 9 OF 9
- DEVICE' TYPE: Gamma Gauge
REFERENCES:
The'following supporting documents for the Model NW-201 Series, NW-301 Series, NW-401 Series source housings are hereby incorpore.ced by reference and are made a part of this registry document.
- Berthold Systems' letters dated August 25, 1998, August 21,
~
1998, July 29, 1998, and July 2, 1998, with enclosures thereto.
- Berthold Systems' fasimile dated August 25, 1998, with enclosures thereto.
ISSUING AGENCY:
U.S. Nuclear Regulatory Commission y Date:
N 2 8 898 Reviewer: .. # 4'v -
/ Cohn -W Lubinski Date: Concurrence: -. &
tteven L7 Baggett i
E -
l l
! REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF DEVICE NO,: NR-186-D-117-G DATE: E0 ATTACHMENT 1 4::t/it.':5'.:lF.
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REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF DEVICE NO.: NR-186-D-117-G DATE: 2 8 D3 ATTACHMENT 3 p 2.50 MIN. q 4 4 SOURCE POCKET m ,=,
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