ML20211L144

Registry of Radioactive Sealed Sources & Devices,Safety Evaluation of Device for Model 35-0402,35-0403 & 35-0404. Certificate:NR-8094-D-808-S

ML20211L144
Person / Time
Issue date:	09/29/1997
From:	NRC
To:
Shared Package
ML20211L147	List: ML20211L144 ML20211L176
References
SSD, NUDOCS 9710100115
Download: ML20211L144 (5)

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REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF DEVICE NO.t NR-8094-D-808-S DATE: September 29, 1997 PAGE 1 OF 4 DEVICE TYPE- Fill Level Cauge Source Holder MODEL: 35-0402, 35-0403, 35-0404 MANUFACTURER / DISTRIBUTOR: Brun Sensor Systems, Inc.

1150 West Third Screet Columbus, OH 43212 SEAT RD SOURCE MODEL DESIGNATION: AECL C-168 ISOTOPE: MAXIMUM ACTIVITY _:_

Cobalt-60 150 millicuries (5.555 GBq)

-s T.RAK TEST FREOUENCY: '6 months PRINCIPAL USE: (D) Gamma Gauge CUSTOM DEVICE: "YES X NO 9710100115 970929 i PDR RC PDR m SSD

REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF DEVICE NQ11 NR-8094-D-808-S DATE: September 29, 1997 PAGE 2 OF 4, DEVICE TYPE: Fill Level Gauge Source, Holder DESCRIPTION:

These devices essentially-consist of the internals used in the 35-0102 and 35-0103 devices surrounded by additional shielding.

For-the 35-0402 and 35-0404, this additional shielding consists of the use of an noper Mallory-1000 shield over 3 inches (76.2 mm) in thickness giving an additional 1-23/32 inches (43.7 mm) of shielding over the 35-0102 and 35-0103; 2-1/4 inches (57.2 mm) of additional lead shielding on the periphery (wall) of the shield; and an additional 1-7/16 inches (36.5 mm) of lead shielding at the bottom of'the~ device.

Forithe 35-0403, the additional shielding is the same with the

exception of the bottom of the shield assembly where the additional lead shielding is 11/16 inch (17.5 mm).

All units have fan-shaped collimators. The 35-0402 collimator is 1/4 inch (6.4 mm) wide and has a 15' spread, the angle being measured downward from a horizontal at the top of the source.

The 35-0403 collimator is 1/4 inch wide at its origin and 1 inch

'(25.4 mm) wide at the-outer surface of the device and has a 27' spread.

EXTERNAL RADIATION LEVELS:

In accessible areas at one foot (304.8 mm) from the surface of a Model135-0402 containing 100 millicuries (3.70 GBq) of cobalt-60 are-4.mR/hr (40 pSv/hr) of less. A radiation level of 20 mR/hr

-(200 pSv/hr)' exists over a small area in the region of the beam port which is inaccessible with the unit installed. The radiation level at the

• bottom" of the 35-0402 is less than i 2 = mR/hr (20 pSv/hr) . The 35-0403 has less shielding in this area than-the 35-0402. -Radiation levels for higher activities may be derived by extrapolation.

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l REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF DEVICE NO.: NR-8094-D-808-S DATE: September 29, 1997 PAGE 3 OF 4 DEVICE TYPE: Fill Level Gauge Source Holder LIMITATIONS AND/OR OTHER CONSIDERATIONS OF USE:

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

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

• REVIEWER NOTE: The user was instructed by the Brun Corporation to avoid tampering with the device containing the cobalt-60 source. The Brun Corporation stated that a service contract would normally be sold with each device to include visits at six month intervals by a Brun Corporation representative 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 radiation surveys at the time of installation.

• REVIEWER NOTE: The devices were evaluated on the basis that they will be mounted at the side of a steel mold thereby preventing access to the beam of radiation and reducing radiation levels in the forward direction to about 0.1 mR/hr (1.0 pSv/hr). If other applications are proposed, an cvaluation of radiation levels in the forward direction will be necessary.

• REVIEWER NOTE: Since an "on-off" indicator is not located at the source shield and since the control console may be remote from the shield, consideration must be given to exposure of persons not aware of the exposed position of the source.

SAFETY ANALYSIS

SUMMARY

These devices were originally approved for licensing purposes on February 9, 1968, by the Atomic Energy Commission (AEC). The Model 35-0402, 35-0403, and 35-0404 Fill-Level Gauge Source Holders are no longer manufactured and distributed by Brun Sensor Systems. Brun Sensor Systems materials license terminated January 23, 1973 and the company was acquired by Industrial Nucleonics that same month.

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I REGISTRY-OF. RADIOACTIVE SEALED-SOURCES ~AND-DEVICES.

SAFETY EVALUATION OF DEVICE 4

HL_t. NR-8094-D-808-S 'DATE: September 29,-1997 PAGE 4 OF 4 1

- DEVICE TYPE: Fill Level Gauge Source Holder i t SAFETY ANALYSIS

SUMMARY

(cont.):

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There d's insufficient information on-file for these-devices'to

!. . perform a safety evaluation. Therefore, this certificate is

- being taken=to inactive status without further review based on

- the original review.and approval issued by the AEC, 4

REFERENCES:

- The following. supporting documents for the Model 35-0402,

. .5-0403; and-35-0404 Fill-Level Gauge source Holders are hereby

1. incorporated by reference and are made a part of this termination

[ registry document.

• - Brun Corporation's letters dated March 20, 1969, August 28, j' .1966, August 22,'1966, June 17, 1966, and June 1, 1966, with 4

' enclosures thereto.

- ISSUING AGENCY:

U.S. Nuclear Regulatory Commission i-r.

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PAGE1 NRC f ORM 567 U. S. NUCLEAR REOULATORY COMMISSION REQUEST FOR A SEALED SOURCE OR-DEVICE EVALUATION g/f7 INSTRUCTIONS: Send tNo request AND e copy of all reisted netters/spplicatione and 2ewings to: The Seeled Source Safety Sectum, ATTN: CNef, OWFN Mail Stop 6 H3 Change the License Tracidng System milestone to 19 and seeign to reviewer code I-5.

NOTE: Retain a copy of tNo request with the applicat on and background files, REQUESTER ,

REGION / LOCATION:

bn 1s tert S/ )U M ]1 ll 111 IV RV R HQ R LFDCB TELEPtCNE NUMeER _ DATE TYPE OF ACTION REQUESTED (Check as - - +n)

MPUCANTeNAME SOURCE REVIEW ]M'ENDMENT OF RFOISTRATION SHEET MAL CONTROL NUMBER (S) N B QdEVICE REVIEW g f u (ytt>t*T 4 LETTUUAPPWTION DATE UCENSE NUMBER (S) CUSTOM REVIEW / . t ,3 r , y u f 4 2 !) /t r y

" 8 I/ # O

/ f 7 f.'

FOR SSSS USE ON' Y REVIEWER MODEL NUMeERS NUMeER AS$aONED

%# &Wh>r DATE ASSIONED DATE TO FEES i N/J/977 DATERECEIWVED W77 ,

TYPE OF ACTION (InsI6cate the number of each type) /

J COMMERCIAL DISTRIBUTION (FORMAL) l USE BY A SINGLE APPLICANT (CUSTOM)

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

NEW NEW ~

NEW ~

NEW AMENDMENT / AMENDMENT AMENDMENT AMENDMENT

/

JNO SAFETY EVALUATION REQUIRED j LICENSING ACTION REQUIRED IF KNOWN -

NO FEES REQUIRED NO

] OTHER (Spec #p)

NOTES TOTAL NUMBER OF 0" # g#/Y REVidW HOURS

[,q y *2 $

NUMBER OF DEFICIENCY LETTERS N4 " ~ p_

NUMBER OF DEFICIENCY CALLS FOR BILLING PURPOSES ONLY NEW REGISWTION - ODUCT INACM -

J AMEN CHANGE ADDRESS CHANGE ADD TO BILLING +~

[ REMOVE FROM BILLING FOR FEE USE ONLY WPE OF FEE FEE CATEGORY ~

T l9A R 98 9C U 90 AMOUNT RECEIVED p * g CHECK NUMeER MATANN UPDATED Qt _

W _

AS REQUIRED C '

DATE OF CHECK

(( LOQ kk. -[ p fh 4 .)j MATSYSASUPDATED 4

REQUIRED APP,_ e, 7 -R-si h7 3

COMMENTS NRC FORM 667 (843)

N TO M  ;

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NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555 0001 September 29, 1997

'% ... . . .o NOTE TO: FILES LISTED BELOW FRO l.t MICHELE BURGESS 782[

DATE: SEPTEMBER 29,1997 I

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 te inactive status without further review based on the original review and approval issued by the AEC, Old Reaistration Number inactive Reaistration Nu nber NR 192-D-101-U NR-8094-D-801 S 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-805-3 NR 192 D-106-S NR-8094-D-806-S NR 192 D-107 U NR-6094-D-807-S NR-192-D-108-U ' NR-8094-D-808-S T 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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