ML20217G630

Registry of Radioactive Sealed Sources & Devices,Safety Evaluation of Device for Model ML-1-1. Certificate:NR-8094-D-801-S

ML20217G630
Person / Time
Issue date:	09/29/1997
From:	NRC
To:
Shared Package
ML20217G634	List: ML20217G630 ML20217G637
References
SSD, NUDOCS 9710140082
Download: ML20217G630 (5)

Text

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REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF DEVICE NO._t NR- 8094 -D- 801-S DATEt September 29, 1997 PJGE 1 OF 4 DEVICE TYPE Gauge Source Holder MODEL: ML-1-1 MANUFACTURER /DISTRIBUTORt Brun Sensor Systems, Inc.

1150 West Third Street Columbus, OH 43212 SEALED SOURCE MODEL DESIGNATION Numec SG-1 Nuclear Chicago 850233 ISOTOPEt MAXIMUM ACTIVITY:

Cesium-137 50 millicuries (1,85 GBq)

LEAK TEST FREOUENCYr 6 months PRINCIPAL USE: (D) Gamma Gauge CUSTOM DEVICE: .,_, YES X NO 9710140082 970929 PDR RC

• SSD PDR

REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES

-SAFETY EVALUATION OF DEVICE HQti NR-8094-D-801-S DATE: September 29, 1997 PAGE 2 OF 4 DEVICE TYP11 Gauge Source Holder.

DESCRIPTIONr The outer physical characteristics of the ML-1-1 are those of a closed steel-cylinder 7-inches (177.8 mm). in height by 6-5/8 inches (168.3 mm) in diameter mounted,- with its longest axis vertical, on a 1/2 inch' (12.7 mm) steel plate. The plate, welded to the bottom of'the device, serves as the base and

-includes four 1/2 inch diameter mounting holes. =The base plate is 6-5/8 inches . (168.3 mm) by 9-1/8. inches (231.8 mm).

Other external features include-an electrical-cable connector and' arlock.- The lock prevents removal of the-device's 3/4 inch (19.1 mm) thick steel cover plate which is normally held in place by eight: machine screws.

The source of radiation is mounted at the' center of a cylindrical shield consisting of two Mallory-loco cylindrical shields assembled and secured by three bolts running vertically from-the top to bottom exterior to the shield components. The bolts are anchored at the bottom to a 1/4 inch (6.4 mm) steel plate and at the top of a steel mounting plate which is attached by three machine screws to the cover plate. The bottom half of the shield assembly is also attached to the bottom steel plate by three angle brackets atd six machine screws.

A rotary-solenoid mounted at the bottom of the shield assembly has its rotor attached to an aluminum cylinder which has a Mallory-1000 shutter block attached by four machine screws to the inner surface _ The application of power to the solenoid causes the. rotor to act against a return spring moving the. aluminum cylinder and shutter block 25" exposing the 5/32 inch (4.0 mm) wide.by 13/16 inch (10.32 mm) high beam port which extends radially from the center of the lower shield component.  !

Interruption'of electrical power to the solenoid allows the return spring to. move the shutter block to the shielded or "off"

position.-

l Internally mounted limit switches indicate the position of the shutter block as *on" or "off" by lights at the control console.

TwoLgreen lights and two red lights (each pair wired in parallel) are used. . Neither set of lights is on when the shutter block is in transit.

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REGISTRY OF RADIOACTIVE SEALED" SOURCES _AND DEVICES

-SAFETY EVALUATION OF DFVICE NO.: ~ NR-8094-D-801-S lDATE: September 129, 1997 EbGE'3 OF 4 DEVICE TYPE: Gauge Source Holder LABELING:

A metal label'3-3/8 inches (85.7 mm) by 2-3/16 inches (55.6 mm),

attached to the-outside of the device 180' from the radiation beam, contains the isotope, activity, model number, date of assay, the manufacturer, and the words, " CAUTION: RADIOACTIVE MATERIAL." The label is basically yellow in color with black lettering along with a magenta radiation symbol. .

PROTOTYPE TESTING:

Brun Sensors had stated that the ML-1-1 prototype had been used in_ steel mill environments for test periods of several hours.

These tests had indicated.the solenoid had been functioning satisfactorily through several cycles.

EXTERNAL RADIATION LEVELS:

Radiation levels at one. foot from'the surface of the ML-1-1 are everywhere less than 2 mR/hr (20 pSv/hr) with a 41 millicurie (1.52 GBq) cealum-137 source. The maximum radiation-level of 1.7 mR/hr.(17 pSv) is at the front of the device at a point on a horizontal plane through the source 30' from the center of the beam port, LIMITATIONS AND/OR OTHER CONSIDERATIONS OF USE:

• Handling, storage, use, transfer, and disposal: To be

-determined by the licensing authority.

• The device shall be leak tested at intervals not to exceed 6 months using techniques capable of detecting 0.005 microcurie (185 Bq) of removable contamination.

• - . REVIEWER NOTE: The ML-1-1 device may:be mounted at some distance from the material to be measured and therefore consideration must be given to access to the beam of radiation with the device in the "on" condition. There is

not--a mechanical or electrical "on-off" indicator at the

! device and the control panel may be located several feet i from the device.

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REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF DEVICE NO.t NR-8094-D-801-S D2 September 29, 1997 PAGE 4 OF 4 DEVICE TYPEt Gauge Source Holder LIMITA.TIONS AND/OR OTHER CONSIDERATIONS OF USE (cont.):

• REVIEWER NOTE: The user was instructed by the Brun Corporation to avoid tampering with the device containing the cesium-13 7 source. The Brun Corporation stated that a service contract would normally be sold with each ML-1-L to include six month visits by Brun representatives for the purpose of inspecting the devices and performing source leak tests.

• REVIEWER NOTE: The Brun Corporation had also stated that they would install and relocate the source holders and perform a radiation survey at the time of installation.

SAFETY ANALYSIS SUMMARX1 This device was originally approved for licensing purposes on August 18, 1965, by the Atomic Energy Commission (AEC). The Model ML-1-1 Gauge Source Holder is no longe ~ manufactured and distributed by Brun Sensor Systems. Brun Sensor Systems' materials license terminated January 23, 1973 and was acquired by Industrial Nucleonics Corp, as a wholly-owned subsidiary, that same month.

There is insufficient information on file for this device to perform a safety evaluation. Therefore, this certificate 19 being taken to inactive status without further review, based on the original review and approval issued by the AEC.

REFERENCES:

The following supporting document for the Model ML-1-1 Source Holder is hereby incorporated by reference and is made a part of this termination registry document.

• Brun Corporation letter dated June 17, 1965, with enclosures thereto.

ISSUING AGENCY:

U.S. Nuclear Regulatory Commission i

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PAGE1 NRC FORM 567 U. S. NUCLEAR REGULATORY COMMISSION C*31.-

REQUEST FOR A SEALED SOURCE OR yp/97 DEVICE EVALUATION INSTRUCTIONS: Send this request AND a copy of all reisted letters /appliceuona and drawings to: The Geeled Source Safety becten, ATTN; Ctwof, OWFN Mail Stop 6 H1. Change the License Tracking System milestone to 19 and assagn to twiewer code b5.

NOTE: Retain a copy of this request with the applicahon and background files.

nEouEsTER REGION / LOCATION:

h/% *1 LW hJdW lI R ll C lil TELEPHONE NUMBER DATE IV RV R HQ LFDCB TYPE OF ACTION REQUESTED (Check me ;- , " ^

APPUCANTe NAME SOU CE REVIEW AMENDMENT OF REGISTRATION SHEET MAIL COwmol WMBER@ DEVICE REVIEW N

j B RjS)m LETTER /APPUCATON DATE UCENSE NUMBER (S) CUSTOM REVIEW Is L a n) v COMMENTS t i 5%

W# *, gg' Sr. /y L 1) t *Y J g yg . p W&f (d&> Ch '9 ) U of2 t)t<<C O FOR SSSS USE Of , , ,_

REVIEWER MODEL NUMeERS NUMBER ASSONED g.nei,et -m 1, pt.+ ,1rsn DATE RECEIVED DATE ASSIGNED f l-/l DATE To FEES 17/8 TYPE OF ACTION (inecate the number of each type) - /

8f/97

/

ACOMMERCIAL DISTRIBUTION (FORMAL) l USE BY A SINGLE APPLICANT (CUSTOM)

SOURCE (9C) DEVICE (9A) SOURCE (90) DEVICE (98)

NEW NEW NEW NEW AMENDMENT / AMENDMENT AME'!DMENT AMENDMENT gj NO SAFELY EVALUATION REQUIRED j LICENSING ACTION REQUIRED IF KNOWN -

NO FEES REQUIRED NO j OTHER (Spe@

TOTAL NUMBER OF NOTES REVIEW HOURS

(, g* "7' #"b U

NUMBER OF M a * *r 9 t "* '

DEFICIENCY LETTERS NUMBER OF .

DEFICIENCY CALLS FOR BILLING PURPOSES ONLY /

NAME CHANGE ADDRESS CHANGE j NEW REGISTRATION - dPRODUCT INACTIVE -

ADD TO BILLING REMOVE FROM BILLING FOR FEE USE ONLY TYPE OF FEE FEE CATEGORY AMOUNT RECENED

.p ]SA 90 9C U 90 CHECK NUMBER

.g ,hF AjM MATANN UPDATED

- AS REQUIRED DATE OF CHECK . /# ~ LOG f ,_ }/)h .%3 , 3 M j MATSYS UPDATED AS REQLIRED

)

ci - vED ev d COMMENTS

}b DATE RETURN br S(M DATE NRC FORM So1 (8-83)

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p% *, UNITED STATES g ,}t NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20$66 0001

.o September 29, 1997-

% ... 3 NOTE TO: FILES LISTED BELOW FROM: MICHELE BURGESS 77[l / I DATE: SEPTEMBER 29,1997 Brun Sensor Systems' materials license terminated January 23,1973, and the company was acquired by Industrial Nucleonics that same month.

The following devices were originally approved for licensing purposes by the Atomic Energy Commission (AEC) during the late '60s and early '70s. These devices are no longer manufactured and distributed by Brun Sensor Systems, There is insufficient information on file for these device to have performed a safety evaluation.

Therefore, these registration certificates have been taken to inactive status without further review based on the original review and approval issued by the AEC.

Old Reaistration Number inactive Reaistration Number 4

NR-192 D-101-U ;NR-8094-D-801-S 2 NR-192-D-102-U NR-8094-D-802-S NR-192-D-103-U NR-8094-D-803-S NR-192-D-104-U NR-8094 D-804-S NR 192-D-105-U NR-8094-D-805-S NR-192-D-106-S NR-8094 D-806-S NR-192-D-107-U NR-8094 0-807-S NR 192-D-108-U NR-8094-D-808-S NR-192-D-109-U NR 8094-D-809-S NR-192-D-110-U NR-8094-D-810-S NR-192-D-111 U NR-8094-D-811 S

• • For additional information conceming Brun Sensor Systems and these devices, including drawings, refer to the NRC archive file: Job R023, Shelf 10196, Box 05.

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