ML20140G410

Registry of Radioactive Sealed Sources & Devices,Safety Evaluation of Device for Models SHLG-1,SHLG-2 & SHLG-3 Source Holders & Shn Source Holder.Certificate: NR-522-D-892-B

ML20140G410
Person / Time
Issue date:	03/11/1997
From:	NRC
To:
Shared Package
ML20140F133	List: ML20140G410
References
SSD, NUDOCS 9706160217
Download: ML20140G410 (15)

Text

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l REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES l SAFETY EVALUATION OF DEVICE (Amended in its Entirety)

NO NR 522-D-892-B DATE: 3/11/97 Page1 1

MODEL: SHLG Series (see description for approved models)

SHN source holder MANUFACTURER / DISTRIBUTOR:

Ohmart Corporation 4241 Allendorf Dr.

Cincinnati, Ohlo 45209 l SEALED SOURCE MODEL DESIGNATION:

Minnesota Mining and Manufacturing Co. (4F6S) A-2102 l Minnesota Mining and Manufacturing Co. (4D6L) A-2104 l Minnesota Mining and Manufacturing Co. (4D6P) A-25159 Minnesota Mining and Manufacturing Co. (4P6T) A-22593 l Monsanto Research Company (24148) A-2102 l Amersham Corp. (CDC.700/CDC.711 m/ CDC.800)

A-2102

Amersham Corp. (CDC PE2) A-2104 l U.S. Nuclear Co. (TYPE 2102) A-2102 U.S. Nuclear Co. (TYPE 3280) A-2104 U.S. Radium Corp. (Model 713-W-C) A-2102

, U.S. Radium Corp. (Model L,ab # 713 (S)-W-E) A-2104 l Gamma Industries (S-10-I A) A-2100 i Amersham Corp.(CKC.Pl/ CKC.P4) A-2100 U.S. Nuclear (3280) A-2100 Monsanto Research Corporation (24148)

)

A-2100 Minnesota Mining and Manufacturing Co. (4F3D) A-2100 l Amersham Corporation (CVN.CY6)

A-33131 l Amersham Corporation (CVN.CY2) A-56740 Amersham Corporation (CDC.93) A-57878 BEBIG Trade Inc. (Cs7.PO4) A-57878 4

9706160217 970311 PDR RC

• SSD PDR l

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REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF DEVICE (Amended in its Entirety)

! NO NR 522-D-892-B DATE: 3/11/97 Page 2 l

ISOTOPE: MAXIMUM ACTIVITY:

i Cesium-137 Model A-2102 2.4 Curies for the SHLG-1 l 9.0 Curies for the SHLG-2 10.0 Curies for the SHLG-3 Cesium-137 Model A-2104 2.4 Curies for the SHLG-1 l 9.0 Curies for the SHLG-2 l

10.0 Curies for the SHLG-3 Cesium-137 Model A-22593 10.0 Curies for the SHLG-3 Cesium-137 Model A-25159 2.4 Curies for the SHLG-1 9.0 Curies for the SHLG-2 10.0 Curies for the SHLG-3 Cesium-137 Model A-57878 2.4 Curies for the SHLG-1 5.0 Curies for the SHLG-2 5.0 Curies for the SHLG-3 l Cobalt-60 Model A-2100 25.0 millicuries for the SHLG-1 (specine License) l 75.0 millicuries for the SHLG-2 (specine License) l 500.0 millicuries for the SHLG-3 (specine License)

Californium-252 Model A-33131 1.5 millicuries for the SHN)(specine License)

Model A-56740 1.5 millicuries for the SHN (specine License)

LEAK TEST FREOUENCY: 36 months l

l PRINCIPAL USE: (D) Gamma Gauge CUSTOM DEVICE: Yes x No i

DESCRIPTION:

The SHLG Series The SHLG Series include models SHLG-1, SHLG-2 and SHLG-3 source holders. The design for the SHLG-1, SHLG-2 and SHLG-3 is basically the same. The source holder bodies are lead filled welded steel shells fitted with an internal tube assembly and collimating structure. The physical size differs between models. The physical size determines the amount oflead each model contains for shielding.

REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF DEVICE (Amended in its Entirety)

NO NR 522-D-892-B DATE: 3/11/97 Page 3 l l

The source capsule is held in place in the source holder in the following manner. The source capsule is placed in a stainless steel source tube assembly. The source tube assembly is held in place by a steel d6tente/ bearing block bolted to the source holder body. Unauthorized removal of the source tube assembly is prevented by covering the counter-bored bolt holes of the d6tente/ bearing block with a neoprene gasket attached with weather-strip compound. The source and source tube assembly are protected from the exterior environment by means of close dimensional tolerance between the shaft of the source tube assembly, the bronze bushing in the d6tente/ bearing block and the neoprene gasket. Source location in the OFF position is fixed in I assembly by a ball d6tente and secured by a padlock through the source tube assembly shaft. The j source ON position is when the operating knob, on the end of the source tube assembly, is pushed I against the gasket stop. The source is in the OFF position (shielded condition) when the source tube assembly is in the extended position.

1 The radiation beam port is covered for additional protection with a thin steel or aluminum plate I (0.030") which is attached to the source holder body with weather-strip compound The SHLG series are used as components of gauge systems for measuring density, level or l interface positions of substances in vessels. The source holders are used with fan shaped collimators which allow an adjustable beam angle from 0 to 45 degrees The approved models are the SHLG-1, SHLG-2 and SHLG-3 source holders.

A typical SHLG series source holder in a density gauge configuration that is used by general licensees is shown in Attachment 1.

A typical SHLG series source holder in a level or interface gauge configuration that is used by i general licensees is shown in Attachment 2. l The SHN Source Ifolder The SHN source holder body is constructed of a high density polyethylene block and cadmium l sheet encased in steel and aluminum. The cadmium sheet is use to reduce thermal neutron l radiation levels. The polyethylene block is fitted with an intemal tube assembly and collimating structure.

l REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES l

SAFETY EVALUATION OF DEVICE (Amended in its Entirety) l NO NR 522-D-892-B DATE: 3/11/97 Page 4 l

The neutron source capsule is placed in a stainless steel source tube assembly. The source tube l

assembly is secured in the SHN source holder body by means of the d6tente/ bearing block bolted to the source holder body. Unauthorized removal of the source tube assembly is prevented by covering the counter-bored bolt holes of the d6tente/ bearing block with a neoprene gasket attached with weather-strip compound. The source and source tube assembly are protected from the exterior environment by means of close dimensional tolerance between the shaft of the source tube assembly, the bronze bushing in the retaining block and the neoprene gasket. Source location i in the OFF position is fixed in assembly by a ball d6tente and secured by a padlock through the source tube assembly shaft. The source ON position is when the operating knob, on the end of the source tube assembly, is pushed against the gasket stop. The source is OFF (shielded condition)  !

when the source tube assembly is in the extended position.

The SHN source holder is used as a component of the Moistart M-5010 moisture gauge. The

, Moistart M-5010 gauge is used to measure the moisture content of bulk materials on a conveyor l

belt.

l A typical SHN source holder in a Moistart M-5000 gauge configuration is shown in Attachment 3.

LABELING:

l The source holder is labeled in accordance with 10 CFR 20.1904. The label contains the radiation symbol, isotope, activity, model number, serial number, name of the l manufacturer, and the words " CAUTION RADIOACTIVE MATERIAL" (ref. dwg. A-33739).

In addition, source holders intended for distribution to persons generally licensed will be labeled in accordance with 10 CFR 32.51. When the density, level, or interface gauge is distributed to

! general licensees, a geneml license label which explains regulatory responsibilities is also attached l (ref. dwg B-33568).

l The Radiation Caution and the General License labels are made of 28 gauge, type 304 stainless l steel etched 0.003 inch deep and filled enamel paint. The Radiation Caution and the General l License labels are both attsched with stainless steel drive screws.

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There are two positions of the source holder shutter on the SHLG Series and the SHN source holders. OFF and ON. The positions are clearly indicated by a label attached to the source holder (ref. dwgs A-22264 and A-29256). The position label is made of 28 gauge, type 304 stainless steel etched 0.003 inch deep and filled with enamel paint. The position label is attached with stainless steel drive screws or pop-rivets.

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REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES I l

l SAFETY EVALUATION OF DEVICE (Amended in its Entirety) l NO NR 522-D-892-8 DATE: 3/11/97 Page5 l

The ON condition waming label cautions the user not to place the device in the ON position unless properly mounted (ref. dwg A-53677). The ON condition warning label is made of four mil l

yellow vinyl and attached with pressure adhesive.

I DIAGRAM: '

See attachments 1,2 and 3 CONDITIONS OF NORMAL USE:

The SHLG Series source holder is used as a component of The Ohmart Corporations Model Densart and Levelart gauges. The Densart and Levelart gauges are used in industrial and process control environments for the measurements of density, level and/or the interface position of materials in vessels.

Typical environmental conditions are as follows:  !

Temperature -40 C to 60 C (-40 F to 140 F)

Pressure Atmospheric l Vibration Ranges from zero to mild )

Corrosion Ranges from zero to highly corrosive vapor Impact Accident Conditions only i Fire Unlikely l' Explosion Unlikely

! The SHN source holder is used as a component of the Ohmart Corporations Model Moistmt 5010 moisture gauge. The Moistart 5010 moisture gauge is used in industrial and process control l environments to measure the moisture content of bulk materials on a conveyor belt.

The typical environment conditions are as follows:

Temperature -40 C to 60 C (-40 F to 140 F) l Pressure Atmospheric l Vibration Ranges from zero to mild  ;

Corrosion Ranges from zero to highly corrosive vapors Impact Accident Conditions only Fire Unlikely Explosion Unlikely  ;

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1 REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF DEVICE l (Amended in its Entirety)

NO NR 522-D-892-8 DATE: 3/11/97 Page 6 PROTOTYPE TESTING:

l A single prototype of the Models SHLG-3 and SHN were subjected to and passed tests for vibration, impact, temperature, and operation of the ON-OFF mechanism. The tests were developed and conducted by the Ohmart Corporation.

l The classification designation for the SHLG series source holder per ANSI N-43.81979 is ANSI 54-353-353-R2 The classification designation for the SHN source holder per ANSI N-43.81979 is ANSI 44-353-353-R1, a) vibration - O through 600 cpm at 0 through 1/16 inch displacement for 16 hours1.851852e-4 days <br />0.00444 hours <br />2.645503e-5 weeks <br />6.088e-6 months <br /> b) impact - several hundred blows with 1/2 pound hammer c) OFF and ON control - operated several hundred times.

In addition, the SHLG series and the SHN source holders successfully passed all tests for compliance with DOT spec. 7A Type A packaging which included water spray,4 ft. free drop, compression and penetration tests.

A wipe test is required every 36 months for the SHLG series and the SHN source holders. This interval is based on the previous performance of Ohman source holders with similar design features which are already approved for 36 month wipe test intervals and previous performance of the Ohmart A-2100, A-2102 A-2104, A-22593, A-25159, A-33131 and A56740 sealed sources.

EXTERNAL RADIATION LEVELS:

The manufacturer reports the following dose rates for source activity as indicated:

Model SHLG-1 Source: Cs-137 (2.4 Ci) l

• Shutter ON

• Shutter OFF 5 cm = 10.2 11.9 l

30 cm = 2.4 1.7 100 cm = 0.3 0.2 dose rates are given in mR/hr.

l REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF DEVICE (Amended in its Entirety)

NO NR 522-D-892-B DATE: 3/11/97 Page 7 Source: Co-60 (25.0 mci) i

• Shutter "ON"

• Shutter "OFF" l

l 5 cm = 30.9 31.8

30 cm = 4.5 3.6 l l 100 cm = 0.6 0.5 l

Model SHLG-2 )

Source: Cs-137 (9.0 Ci)

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• Shutter ON

• Shutter OFF l

5 cm = 9.0 5.5 l 30 cm = 3.5 1.0 100 cm = 0.5 0.1 Source: Co-60 (85.0 mci)

• Shutter "ON"

• Shutter "OFF" 5 cm = 26.2 26.2 30 cm = 4.4 4.0 100 cm = 0.6 0.5 l

Model SHLG-3 Source: Cs-137 (10.0 Ci)

• Shutter ON

• Shutter OFF 5 cm = 2.2 0.6 30 cm = 0.6 0.1 100 cm = 0.1 ---

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! dose rates are given in mR/hr.

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REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF DEVICE (Amended in its Entirety)

NO NR 522-D-892-B DATE: 3/11/97 Pagea Source: Co-60 (500.0 mci)

• Shutter "ON"

• Shutter "OFF" 5 cm = 29.8 27.7 30 cm = 4.5 4.1 100 cm = 0.6 0.6 i

Model SIIN Source: Cf-252 (1.5 mci) i

• Shutter ON

• Shutter OFF 5 cm = 3.7 11.8  ;

30 cm = 3.7 5.8 100 cm = 0.2 0.2 dose rates are given in mR/hr.

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I OUALITY ASSURANCE AND CONTROL: 1 The Ohman Corporation received its 1S0-9001 Certification #107563 on January 14,1997.

The Ohman Corporation maintains a quality assurance and control program. This program includes the following inspections:

I l Scaled source l

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Examination of vendor source certificate for proper activity and leak test results, f

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Incoming wipe test before placing source in inventory.

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Wipe test of complete device prior to shipment. l l

Wipe test counting equipment can detect less than 0.005 pCi of activity on the l wipe.

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i REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF DEVICE l

(Amended in its Entirety)

NO NR 522-D-892-B DATE: 3/11/97 Page 9 Radiation Field intensity:

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• Measure radiation field intensity of completed device prior to shipment to assure that values do not exceed 5 mR/hr at 30 cm from the surface of the device nor 100 mR/hr at 5 cm from the surface as defined by ANSI standard N-43.81979.

• Look for defects in the source holder body and streaming from all mating surfaces adjacent to the source.

Mechanical parts and construction:

• Visual inspection of all parts before and after assembly.

• Visualinspection of all welds.

• Operations check of source OFF and ON mechanism.

- Visual check for proper location and attachment of all labels.

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LIMITATIONS AND / OR CONSIDERATION OF USE:

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. When the SHLG Series and SHN models are used as density, level, or interface gauges and labeled in accordance with 10 CFR 32.51, the device shall be distributed only to persons generally licensed by the U.S. NRC or an Agreement State.

I When the SHLG Series and SHN models are used as density, level or interface gauges and labeled in accordance with 10 CFR 20.1904, the device may also be distributed to persons specifically licensed by the U.S. NRC or an Agreement State.

. The device shall be leak tested at 36 months intervals using techniques capable of l detecting 0.005 pCi of removable contamination.

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. Handling, storage, use, transfer, and disposal: To be determined by the licensing l

l authority.

. Review Note: The device may be installed by the user only when the shutter is locked in the closed position.

. This registration sheet and the information contained within the references shall not be changed without the written consent of the U.S. NRC.

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REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF DEVICE (Amended in its Entirety)

NO NR 522-D-892-B DATE: 3/11/97 Page 10 l

l SAFETY ANALYSIS

SUMMARY

Based on our review of the information and test data cited below, we conclude that the SHLG Series and the SHN model designs are acceptable for licensing purposes. Furthermore, we conclude that the SHLG Series and SHN models would be expected to maintain their integrity for normal conditions of use and accidental conditions which might occur during uses specified in this cenificate.

Based on our review of the information and test data submitted and the interpretation of the regulations and the devices intrinsic safety features, we conclude that the SHLG Series and SHN models when used in density, level and interface gauges on non-accessible vessels are acceptable for distribution to persons who are generally licensed. The manufacturer has submitted data to l

demonstrate that:

1 (i) Under ordinary conditions of handling, storage, and use of the device, the by-product material contained in the device will not be released or inadvenently removed from the device, and it is unlikely that any person will receive in any l period of one calendar quarter a dose in excess of 10 percent of the limits specified ,

in the table in 10 CFR Part 20 Section 201201(a). I l

! (ii) Under accident conditions (such as fire and explosion) associated with handling, l storage, and use of the device, it is unlikely that any person would receive external I radiation dose of dose commitment in excess of the dose to the appropriate organ l l as specified in the following table: l 1

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Part of Body Rem l Whole body, head and trunk, 15 active blood - forming organs; l gonads; or lens of eye Hands and forearms; feet and 200 ankles; localized areas of skin I average over areas no larger than 1 square centimeter Other organs 50 l

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REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF DEVICE (Amended in its Entirety) l

• l NO NR 522-D-892-B DATE: 3/11/97 Page 11 l

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REFERENCE:

The following supporting document for the model SHLG Series and SHN is hereby incorporated by reference and is made a part of this registry document:

• Ohmart Corporation's letter dated April 3,1996.

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+ Ohmart Corporation's letter dated March,51997.

ISSUING AGENCY:

U.S. Nuclear Regulatory Commission, Division of Industrial and Medical Nuclear Safety, Medical, Academic, and Commercial Use Safety Branch, Washington DC 20555 DATE: REVIEWER:

DATE: CONCURRENCE:

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Attachment 1

. - . . ._-. .. . - . . _ . - . . = . . - . . - . . _ - . . - - . - .. _... . .. -. - -

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REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF DEVICE r (Amended in its Entirety)

A l NO NR 522-D-892-B DATE: 3/11/97 Page 12 l

l (Density Gauge) I l

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=3<ms HOLDER gAjiAnON O n +

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Attachment 2 i i

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REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF DEVICE (Amended in its Entirety)

NO NR 522-D-892-B DATE: 3/11/97 Page 13 (Level and/or Interface Gauge) i otT.

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I SHLG SERIES ~

EL DIATION N EE O s  :

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i Attachment 3

REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF DEVICE (Amended in its Entirety)

NO NR 522-D-892-B DATE: 3/11/97 Page 14 (MOISTART M 5000 GAUGE) sH-Ft SOURCf h0LDl4 (GAWWA) saa souter Motoen (,cumen) rl4 p- =:.

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c g Y, l ET [PE' j51 b. I i, u==- ,,= ruans

" ShNN's1"al

as sammen sm{ aswees BY i 1

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0.472" =

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'CS-137,- 0.31 5,,

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CURRENT M ANUFACTURER MODELS

1. AMERSHAM CORPORATION CAPSULE X.9 MODEL CDC93 (ANSI CLASSIFICATION C66646) '

ENGRAVED INFORMATION: Al

CS-137 (SERIAL NUMBER) l TREFOIL (ON END OF CYLINDER)

2. BEBIG CAPSULE Cs7.PO4 (ANSI CLASSIFICATION 77C66646)

ENGRAVED INFORM ATION: BB ---

Cs7.PO4 - - - -

57878 i

(SERIAL NUMBER / YEAR OF m a a n 2 W V f W M p g ,TS P hlANUFACTURE) Cs-137 SOURCE CAPSULE 5000 mci MAX.

TREFOIL -

AssaKs +/- 1/r unc,,sc reactiou "d[sI4ap a

" " *~

comas m '.'.'.".l !bb' or onesaus u.arss oiiourz secone anc = mmes M7"_"n (( n '*"g** **a'5 8' **5 ou" l " " A-2102 N""" 2/20/9MRw" 'Y/20/9d A-57878

. _ _ _ _ - _ -_____ . _ _ _ _ _ _ - _ _ _ _ - _ _ _ . . - - _ _ _ _ _ _ _ _ - _ _ _ - -,. - _ _ _