ML20148G979

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Registry of Radioactive Sealed Sources & Devices,Safety Evaluation of Device for Model 5243-XX Series. Certificate:NR-375-D-102-S
ML20148G979
Person / Time
Issue date: 05/30/1997
From: Steven Baggett, Doug Broaddus
NRC
To:
Shared Package
ML20148G975 List:
References
SSD, NUDOCS 9706090007
Download: ML20148G979 (14)
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Text

REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF DEVICE (AMENDED IN ITS ENTIRETY)

NO.- NR-375-D-102-S DATE: May 30, 1997 PAGE 1 OF 10 DEVICE TYPE: Tube Wall Thickness Gauge MODEL: 5245-XX series (see description for approved models)

DISTRIBUTOR: Isotope Measuring System, Inc.

108 Blue Ridge Drive Cranberry Twp., PA 16066 MANUFACTURER 1 Isotope Measuring Systems Dieselstrasse 55 Heiligenhaus D-42579 Germany SEALED SOURCE MODEL DESIGNATION: Amersham Model: CDC.PE4 l i

ISOTOPE: MAXIMUM ACTIVITY:

Cesium-137 275 Ci (10.18 TBq) l

[55 Ci/2.04 TBq per source; see Table I) j LEAK TEST FREOUENCY: 6 months PRINCIPAL USE: (D) Gamma Gauge l CUSTOM DEVICE: YES x NO 9706090007 990605 PDR RC

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REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF DEVICE (AMENDED IN ITS ENTIRETY)

NO.: NR-375-D-102-S DATE: May 30, 1997 PAGE 2 OF 10 l

DEVICE TYPE: Tube Wall Thickness Gauge DESCRIPTION: l An Isotope Measuring Systems 5245-xx Series profile thickness gauge consists of the following:

  • Metal Measuring Frame Structure (C-Frame or O-Frame)
  • Individual Source Housings
  • Ionization Chamber Detectors
  • Electronic and Microcomputer System
  • Air Blower Purge System
  • Remote Mounted Operator Panel
  • Source Shutter Open/ Closed. Indicator eight Boxes  !

The device has the sealed sources mounted in source housings in the upper arm of the measuring frame. The source housings are made with Heavy Metal [ Tungsten Oxide, specific gravity = 18.9, melting point = 6116*F (3380 C)] cylindrical shutters with fan type collimators. The shutters are mounted with axial springs which close the shutter if there is a electric power or pneumatic failure. The housings are mounted some: distance apart along the upper arm of the frame and are tilted so'that the cross-sectional area of each radiation beam will cover all the detectors which are mounted along the bottom arm of the measuring frame.

l The measuring frame is c'onstructed from 0.375" ('O . 953 ' cm) thick l steel box section and rides on three rails set into the floor of the facility. The frame.is moved by an electric. motor on the rails between a storage and a measuring position. The microcomputer system ensures that the shutters on the device cannot be opened or remain in an open position unless the measuring frame is in the measuring position.

The measuring frame is equipped with a cooling system which will ensure the temperature in the area of the measuring frame will not exceed 158 F (70*C). Temperatures above 158 F will cause the system to give faulty readings. The device itself will maintain its radiological integrity at temperatures up to 599oF (315oC)

REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF DEVICE (AMENDED IN ITS ENTIRETY)

NO,; NR-375-D-102-S DATE: May 30, 1997 PAGE 3 OF 10 DEVICE TYPE 1 Tube Wall Thickness Gauge i

DESCRIPTION (cont ' d) : I The measuring area of the device is equipped with an air purge system which will clear any corrosive vapors from the area. This system is also equipped with an alarm which will notify the operator if the air system is not operating correctly.  ;

Other safety features of the device include:

  • automatic shutter closure if there is in electric or air

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i failure, if there is no material in the measuring' gap, if l the device is knocked over or moved out of its measuring I position, or if the temperature exceeds 158 F (70?C). l 1

a steel / lead wall constructed in front of the C-frame e '

opening to prevent the radiation dose rate.from' exceeding l 0.25 mR/hr (2.5 pSv/hr) in any accessible area near the' 1 C-frame opening. For 0-frame _ gauges,"the lead / steel wall l may not be applicable since there.is no openin'g. Howe'ver, even with O-frame gauges, a 0. 25 mR/hr - (2. 5 pSv/hr) controlled area must be maintained.s , 30 . l e

source shutter open/ closed (red / green: light), indicator light  !

boxes on the top of the unit (C-frame gauges),'or wherever '

they provide best visibility to the gauge operator and other plant personnel (0-frame gauges).

The 5245-xx Series profile gauges have been registered as a  :

series because the distributor indicates that, gauges will be manufactured for licensees on an individual; basis. Therefore, the dimensions of the gauge may vary but the design of the source housing will remain the same. The distributor will submit the design of each new gauge of the series to NRC for approval.

REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES ,

SAFETY EVALUATION OF DEVICE  !

(AMENDED IN ITS ENTIRETY) 1

NO.
NR-375-D-102-S DATE: May 30, 1997 PAGE 4 OF 10 )

DEVICE TYPE: Tube Wall Thickness Gauge  ;

i DESCRIPTION (cont ' d) : j 3

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The approved models within the series and their respective device l specifications are listed in Table I, below:

TABLE I. Dimensions and Activity - 5245-xx Series Gauges '

5245-01 5245-03 (inches)

Length 206 '

319.4 j (meters) 5.23 5 8.114 Height (inches) 144 ~147.6 )

(meters) .3.66 3.750  :

Width (inches) - ' '

17 . 20.9 (meters) 0.432 >

'0.53 Air Gap (inches) c. S 98 ,

'88.6 (meters) 2'.49 ,

2.25 Ionization Chambers >

56

  • 93 1

Source Housings 2 5 i Total Activity (Ci) 110 275 l (TBa) 4.07 10.175 DIAGRAM:

Attachments 1-5 show profile thickness gauge Models 5245-01 and 5245-03, the source housing, and the radiation dose rate contours for each gauge.

LABELING:

The device is labeled in accordance with Subpart J, 10 CFR Part

20. The labels contain the radiation symbol, isotope, activity, model number, serial number, name of the distributor, the words

" CAUTION-RADIOACTIVE MATERIAL", and full details of contact names and telephone numbers.

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I REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF DEVICE (AMENDED IN ITS ENTIRETY) l EQ 1 NR-375-D-102-S DATE: May 30, 1997 EAGE 5 OF 10 )

DEVICE TYPE: Tube Wall Thickness Gauge l

LABELING: (Cont'd) 1 Label location is selected by IMS so as to provide maximum l visibility to persons approaching the gauge from both sides. The !

labels will be constructed of an appropriate (20 gauge minimum l thickness) metal, selected for its ability to withstand the  ;

environmental conditions (temperature, corrosive atmospheres, i etc.) at the installation location. At a minimum, the metal i labels will have a melting point greater than 500*F (260*C) and a )

yield strength greater than 5000 psi (34.5 MPa) . Typical label metals include stainless steel, aluminum alloy, brass, and bronze.

Labeling information is formed into the metal label material by .

engraving, etching, stamping, or other equivalent permanent {

process. The labels are attached to the device with metal J fasteners (screws, bolted, etc.).  !

i CONDITIONS OF NORMAL USE: ,

Thede'riceisintendedforuseinindustrialgauging.

applications. The device is typically used to measur e thickness l profiles of metal plate / sheetJ ranging in thickness'from 0.0004" '

to 10" (0.01 mm to 25.4.cm). The device is designed for the following environments:

Temperature ......... ....... Up to 158*F (70*C)

(operating)

Device will maintain its integrity in temperatures up to 600*F (315 C)

Pressure .................... Atmospheric Vibration ................... Ranges from zero to mild Corrosion ................... Ranges from zero to Highly Corrosive Vapors Fire ........................ 1472*F (800 C), 20 minutes PROTOTYPE TESTING:

Both the profile thickness gauge and the source housing used within the gauge have been tested in accordance with the procedures specified in the NBS Handbook 129, American National

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, l T J REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF DEVICE (AMENDED IN ITS ENTIRETY)

NQ 1 NR-375-D-102-S DATE: May 30, 1997 PAGE 6 OF 1Q DEVICE TYPE: Tube Wall Thickness Gauge l

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PROTOTYPE TESTING: (Cont'd) j l

Standard N538. The source housing received a classification of '

ANSI 32-SSS-454-R3. The profile thickness gauge received a classification of ANSI 32-SSS-905-R3. i' stray radiation measurements for both the source housing and the device, shutter in the open position, are equal because they were measured in the primary beam. The radiation measurements are 1936.0, 167.2, and 17.6 R/hr (19.36, 1 572, and 0.176 Sv/hr) at 6*, 30, and 100 cm (2.4" 11.8", and 59.4"), respectively.

6 cm is the smallest distance from the source housing due to the geometry of the measuring device. l In addition, the shutter mechanism was subjected to cycle testing. Shutter open/close operation was performed every 40 '

seconds for over 1300 cycles in temperatures ranging from 0*F

(-17*C) to 140*F (60*C).

Prototype sources of the ones used in the device have achieved ANSI N542-1977 classifications of 77E63535.

EXTERNAL RADIATION LEVELS:

Isodose curves showing a 0.75 mR/hr (7.5 pSv/hr) contour around the Model 5245-01 measuring frame are shown in Attachment 3. The same contour around a Model 5245-03 loaded with 250 Ci (9.25 TBq) of 2"Cs is shown in Attachment 5. The contour lines show the 0.75 mR/hr (7.5 pSv/hr) area with the shutter in the open position. The 0.25 mR/hr (2.5 pSv/hr) contour can be defined by simply reducing the distance from the measuring frame by a factor of 1.73. -

The only place where an individual can stand'within 3 (0.91 m) of the Model 5245-01 C-frame during normal operation is.in front of the 'C' opening. (1m individual cannot stand within this distance I of a Model 5245-03 O-frame gauge during normal. operation.) This area will have a lead / steel wall constructed to confine the i radiation dose rate to 0.'25 mR/hr (2.5 pSv/hr).

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4 REGISTRY OF RADIOACTIVE SEALED SOURCES 'AMD DEVICES SAFETY EVALUATION OF DEVICE (AMENDED IN ITS ENTIRETY) l l

NO.: NR-375-D-102-S DATE: May 30, 1997 PAGE 7 OF 10 DEVICE TYPE: Tube Wall Thickness Gauge EXTERNAL RADIATION LEVELS: (Cont'd)

Radiation dose rates at 6, 30, and 100 cm (2.4", 11.8", and 39.4") from the source housing and the Model 5245-01 are shown in Table II, below:

l Table II. External Dose Rates - 5245-01 Distance from Radiation Dose Rate From: j Source Housing or Meas. Frame Source Housing Meas. Frame Primary Beam Shutter Closed Shutter Closed shutter Open 2.36" 50.4 mR/hr 0.5 mR/hr 1936 R/hr (6 cm) (504 pSv/hr) (5.0 pSv/hr) (19.4 Sv/hr) 11.81" 4.0 mR/hr Background 167.2 R/hr (30 cm) (40 pSv/hr) (1.7 Sv/hr) 39.37" 0.36 mR/hr Background 17.6 R/hr (100 cm) (3.6 uSv/hr) (176' msv/hr)

OUALITY ASSURANCE AND CONTROL:

IMS has submitted quality assurance and, control procedures.for the manufacture of 5245-xx Series gauges that have beengdeemed acceptable for licensing purposes by the NRC'. ~hiso, IMS has procedures for inspecting units received at customer facilities in this country. A copy of each, set of procedures is on file with the Medical, Academic, and Commercial Use SdfetyfBranch,

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a . . , s LIMITATIONS AND/OR OTHER CONSIDERATIONS OF USEi

  • 5245-xx Series devices shall lxa , distr,ibuted only--to persons specifically licensed by the'NRC or an7 Agreement State.
  • Handling, storage, use, transfer, and' disposal: To be determined by the licensing authority. In view that the sources used in the device exhibit high dose rates, the sources should be handled by experienced licensed personnel using: adequate remote handling equipment and procedures.

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-REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES l SAFETY EVALUATION OF DEVICE  !

(AMENDED IN ITS ENTIRETY)  !

NO.: NR-375-D-102-S DATE: May'30, 1997- PAGE 8 OF 10 j DEVICE TYPE: Tube Wall Thickness Gauge l

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. LIMITATIONS AND/OR OTHER CONSIDERATIONS OF USE: (Cont'd)

  • l
  • Model 5245-xx gauges shall be leak tested at intervals not to  !

exceed 6 months using techniques capable of detecting 0.005 pCi -:

'(185 Bq) of removable contamination. j l

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  • The Model- 5245-03' gauge is to be installed at Bethlehem Steel. 'f The 5245-01, meanwhile, is approved only for measuring aluminum. i
  • REVIEWER NOTE: The device must have all of the following safety. l features checked for proper function at the time of installation j and at intervals not to~ exceed 6 months:

I e spring mechanism which will close the shutter ifithere is a power failure, '

f e air / electric supply failure detectibn system.

  • proximity switches which will' ensure shutter closure if j the device is nottin-the measuring position.  ;

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  • detection system.which will ensure shutter closure if no ,

material is in.thewme~asuring ~ ,

gap; -

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  • . shutter indicator # lighkboxes.l ,

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, . i REVIEWER NOTE: A'Model 524'5-01! devi'ceimust bh fins'talled with a lead / steel wall constructed in front of theC'iopening of the device. .The wall mustTconfine;the-radiat'lon dose; rate to.0.25-mR/hr (2.5 pSv/hr) or' lower. qO. frame gaugevinstallations may not necessitate this wall. ,A contrBiled: area shall be maintained around both C-frame and O lframe to ensure'that,no' individual will be exposed to a radiation ^ dose rate" greater-than: 0.25 mR/hr (2.5

- Sv/hr). This includes when the' device'is in both the "on-line" and " park"' positions. The areas above the device, such as catwalks,' if not shielded,~must be unaccessible during operation .]

due to the high radiation dose rates in the area above the I measuring frame. t

  • If Isotope' Measuring Systems wisbes:to-add any new devices to this registry sheet as members of the 5245-xx series, they must submit  ;

design details for the gauge to the NRC.

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_._. _ _ - - _ . _ = _ _ - _ _ _ . _ _ - - , _ __ . . _ _ _ _ . - . _ _ _

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-REGISTRY OF RADIOACTIVE' SEALED' SOURCES AND DEVICES  !

SAFETY EVALUATION OF DEVICE  !

.(AMENDED IN ITS ENTIRETY)  !

NO : NR-375-D-102-S DATE: May 30, 1997 FAGE 9 OF 10 I N -

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l DEVICE TYPE: Tube Wall Thickness Gauge l l

LIMITATIONS AND/OR OTHER CONSIDERATIONS OF USE: (Cont'd) e REVIEWER NOTE: The on/off light box and identification labels must l

be located in such a way as to be easily visible to persons  !

approaching the device, and from either side.

  • This, registration sheet and the information contained within the

! references shall-not be changed'without~the written consent of the .!

NRC.  !

i SAFETY-ANALYSIS'

SUMMARY

Based on our review of Isotope Measuring Systems' 5245-xx Series  !'

profile thickness gauges, and the information and test data' cited below, we continue to conclude that these devices are acceptable for specific licensing purposes. '

Furthermore, we continue to conclude that-these devices would be ,

expected to maintain their containment integrity for normal conditions i of use and accidental conditions which might occur ~during uses i specified in1this certificate. , .  ;

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REFERENCES:

The following supporting documents for the Model-5245 series profile thickness gauge are hereby incorporated by reference and are made a part of this registry document. -

Lorenz & Engelhardt's application for AEG dated J,une 8, 1990, and subsequent letters dated July 17,;1990,,JulyL31, 1990, October 12, 1990, November 24, 1990, and January 17,~1'991, with enclosures thereto. <

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  • ' Engelhardt & Associates'sle'ther"f'or Isotopes Measuring Systems dated July 28, 1992, with enclosures thereto, i Isotope Measuring Systems'-letters dated Ju'ly 3'1,

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  • 1992, March 1,  !

1995 (2 Letters), November 20, 1995, February 21, 1996, April 19, 1996, and facsimile transmissions dated June 14, 1995, and June 16, 1995, with enclosures thereto.

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I REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES  !

SAFETY EVALUATION OF DEVICE I (AMENDED j IN ITS ENTIRETY) i l

NO,; NR-375-D-102-S DATE: May 30, 1997 PAGE 10 OF 10 l 2

pEVICE TYPE: Tube Wall Thickness Gauge '

ISSUING AGENCY:

U.S. Nuclear Regulatory" Commission I

, Date: May 30. 1997 Reviewer: to oI en -

~Dougl'is A. Broaddus l Date: May 30, 1997 Concurrence: /~

27 4

6teven L. ~Baggett 1

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REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES  ;

SAFETY EVALUATION OF DEVICE (AMENDED IN ITS ENTIRETY)

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REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES  ;

SAFETY EVALUATION OF DEVICE '

(AMENDED IN ITS ENTIRETY)  !

NO.: NR-375-D-102-S DATE: May 30, 1997 ATTACHMENT 2 i

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REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF DEVICE  !

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REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF DEVICE (AMENDED IN ITS ENTIRETY)

NO.: NR-375-D-102-S DATE: May 30, 1997 ATTACHMENT 4 l .

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REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF DEVICE (AMENDED IN ITS ENTIRETY)

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