ML20207R832

From kanterella
Revision as of 15:41, 5 December 2021 by StriderTol (talk | contribs) (StriderTol Bot change)
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Jump to navigation Jump to search
Registry of Radioactive Sealed Sources & Devices Safety Evaluation of Device Amended in Entirety, NR-412-D-133-B, for Kay-Ray,Inc Model 7100 B
ML20207R832
Person / Time
Issue date: 05/20/1985
From: Wright E
NRC
To:
Shared Package
ML20207R819 List:
References
FOIA-87-142 NR-412-D-133-B, NUDOCS 8703180182
Download: ML20207R832 (6)
v • d • e


Text

. _ _ _ _ _ _ _ _ _ _ _ _ _ .

REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES

( <,.

  • SAFETY EVALUATION OF DEVICE AMENDED IN ENTIRETY NO: NR-412-D-133-B DATE:

R 20 1985 PAGE 10F 5 DEVICE TYPE: "C" Head Gauge MODEL: 7100 B (also reference 7100, 2500-C, 7100, 4100 F) 9 l

MANUFACTURER / DISTRIBUTOR: Kay-Ray, Inc.

516 W. Campus Drive Arlington Heights, IL 60004 SEA'.ED SOURCE MODEL DESIGNATION: Kay Ray Model 7701 Series

( ISOTOPE: Americium-241:Be MAXIMUM ACTIVITY: 1 curie (Specific license distribution) 500 milli curies (General license distribution)

LEAK TEST FREQUENCY: 36 months PRINCIPAL USE: (H) General neutron source applications CUSTOM DEVICE: YES X NO

[

070318o182 870313 42 PDR AN

__-___-__________L

  • REGISTRY RADI0 ACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF DEVICE

(, ( CORRECTED PAGE)

NO: NR-412-D-133-B DATE: 0 1985 PAGE 2 0F 5 DEVICE TYPE: "C" Head Gauge DESCRIPTION:

The Model 7100B (Type "C") is a source housing used in various Kay-Ray systems for level / interface determination of materials in industrial process equipment.

This source housing contains a doubly encapsulated neutron source of americium' 241:be which directs fast neutrons through virtually neutron transparent vessel:

walls into the vessel interior. If hydrogen bearing material is present, the -

fast neutrons are converted into slow neutrons which are reflected back into the neutron detectors in direct proportion to the hydrogen density. This information is used for determining level / interface location of materials in the vessels.

Information is analyzed by micropro:essing devices.

g The 7100B housing is all-welded steel construction with a sealed source capsule threaded and pinned to a shaft inside the device. The source shaft and source

{( arm handle are pinned in assembly to ensure positive movement of the source to either the " measure" of the " store" position.

The source housing has three holes for mounting, but the user must fabricate his own supports and brackets, which will'be dependent upon the configuration needs for the particular installation. However, Kay-Ray, Inc. personnel will work closely with the user by recommending specific locations for installation and approving drawings of proposed installations and supports.

The 7100 B differs from the 7100 A in only one major way; the cover of th'e i

enclosure is made of 3/8" cold rolled steel rather than 3/10" cold drawn steel.

Also, a new junction box manufacturered by Appleton Electric will be used. The

! additional thickness of the ton chamber was required to meet the requirements

! of National Electrical Code for hazardous environments.

LABELING:

The source housing is labeled in accordance with the requirements of Section l 20.203,10 CFR 20 and/or Section 32.51(a)(3)(iii),10 CFR Part 32 depending on

! whether the device is being distributed to specific or general licensees, a

I DIAGRAM: See Attachment 1.

l i

l i

L

  • ~. '

REGISTRY RADI0 ACTIVE SEALED SOURCES AND DEVICES g '~ SAFETY EVALUATION OF DEVICE

( CORRECTED PAGE)

{L .

5: NR-412-D-133-8 DATE: .. APR 2 9 E5 PAGE 3 0F 5 DEVICE TYPE: "C" Head Gauge CCNDITIONS OF NORMAL USE: -

Tne model 71008 source housing is used in conjunction with various Kay-Ray systems for the measurement of interface level, moisture content, or product composition in various industrial processes. Noramily, the device is mounted on pipe, process vessels, or storage vess'els in harsh industrfal environments.

(These environments normally limit the flow of personnel to a bare minimum -

during working hours.) The source housing is insulated from high vessel temperatures by a refractory fiber insulation, pR3TOTYpE TEST 7NG:

A prototype of the Model 7100 A device was tested in 1978 and the device was

[( approved for licensing purposes in December 1978. Additionally, a production medel was tested by an independent testing laboratory for compliance with Department of Transportation rules 1,n title 49 CFR 173.398, Standard for Type A Pa:kaging. The source housing was tested for heat, cold, reduced pressure, les-displacement, medium-frequency vibration, high displacement, low-frequency vibration, free drop, penetration, and compression and is certified for DOT Type A packaging. ,

The Model 7100 B is expected to exceed these testing standards due to the increase in the structural strength of the unit.

The sources used in the device are required by Kay-Ray to have an ANSI N548 classification of 77C65425.

EXTERNAL RADIATION LEVELS:

According to the device and source manufacturer's data, the following dose rates are not expected to be exceeded.

1) At the surface of the Model 71008 source housing loaded with 0.5 curies of americium 241:be - 14 mrem /hr.

I k 2) At 1 meter from an unshielded 1 curie americium 241:be source -

10 mrem /hr.

( .

e .

  • REGISTRY RADI0 ACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF DEVICE (CORRECTEDPAGE)

NC: NR-412-0-133-B DATE: APR 75 iS85 PAGE 4 0F 5 DEVICE TYPE: "C" Head Gauge QUALITY ASSURANCE The quality control procedures include the following checks by the Kay-Ray Quality Control Department: .

1. Conformance of material in completed device to bill-of-material specifica-tions. ,
2. Conformance of fabrication (welding, machining, and assembly) to detail and assembly drawings of the device.
3. Conformance of proper operation of device (shutter mechanism).
4. Check of radiation levels when the device is loaded with a radiation sourc'e to assure conformance of radiation levels to previously approved isodose curves submitted to the NRC.

LIWITATIONS AND/OR OTHER CONSIDERATION OF USE: .

o Devices intended for distribution to persons specifically licensed by the NRC or an Agreement State shall be labeled in accordance with Section 20.203(f) o Devices intended for distribution to persons generally licensed pursuant to Section 31.5 shall be labeled in accordance with Section 32.51(a)(3). -

o. Devices intended for use under general license shall be installed and initially tested for external radiation levels, required labels, leakage / contamination of radioactive material by Kay-Ray Inc. or other persons specifically licensed by the NRC or an Agreement State, o Handling, storage, use, transfer and disposal: For devices used under specific license will be determined by the licensing authority. For devices used under general license are rovered by the requirements of 10 CFR 31.5. ,

o The device shall be leak tested at 3 year intervals using tech-niques capable of detecting 0.006 microcurie of removable contamination. The test shall be performed by specifically licensed persons.

o This registration sheet and the information contained within the references shall not he channad nr trandarraa v4 +u. + wr4 ++a.,

  • .- REGISTRY RADI0 ACTIVE SEALED SDURCES AND DEVICES

(..- SAFETY EVALUATION OF DEVICE AMENDED IN ENTIRETY N0: NR-412-D-133-B DATE: PAGE 5 DF 5 DEVICE TYPE: "C" Head Gauge SAFETY ANALYSIS

SUMMARY

Based on our review of the design information and test data contained in the references listed below, we conclude that the Model 7100 B source housing is acceptable for licensing purposes and can be safely operated (following the manu-facturers instructions) by persons not having training in radiological protec-tion. We further conclude that under ordinary conditions of use the americium 241 source contained within the Model 7100 B Source Housing cannot be inadver-tently removed for either routine or emergency conditions of use. Under ordinary conditions of handling, storage and use, it spears unlikely that any person would receive greater than 10 percent of the dose limits specified in $20.101(a),

10 CFR 20. It also appears unlikely that under accidental conditions (such as a fire and explosion) associated with the handling, storage and use of this device that any person would receive an external radiation dose or dose commitment in excess of the dose to the appropriate organ as specified in Column IV of the

(.tablein$32.24,10CFR32. -

REFERENCES:

The following supporting documents for the Mocal 7100B device are hereby incorporated by reference and are made part of this registry document:

1. U.S. NRC certificate of registration dated July 11, 1984 (NR-412-D-133-5)
2. Kay-Ray letters dated May 25, 1982, August 26, 1982, April 30, 1984, and August 6,.1984 with pnclosures thereto.
3. Supersedes registry sheets dated December 16, 1982 and July 11, 1984.

l t

j ISSUING AGENCY:

! U.S.* Nuclear Regulatory Commission i

Date: Reviewer: _

(f r Date: OP ff fM Concurrence: eyOb Q

l t

gic' $$: M-GM-W- 133 ,9 DATE: ATTACINENT: 3

__ GAR zo gg t

v l

  • O, p---. ._

I -

i I

I -

g i

I. - -

f .

- 1 l I,- .

I I

I 1.

o L _ _. _ _ _ __ _ _ _ .i o l .

(

. n.. , Meas.ure 7 - -

(

. N ss j' . . . ; ,. g.

M .s % ^ /

m ,.. - .. .

,%4 .

I . - - - - .

\ .

. . . . ..s r r ' '

, . i _3 . ..

'ss store .

tcu . _ ._

MODEL 7100 (T PE C) HEAD E4EYI4Y /NO.

m .

( .

s w _

k 9 . g

-- - - - - , . - - - - - ~ , , . - , _ - - -------..-,,-,,..,- .=---.-----,_ - --, - ,---,,- ,-- m ,.,c-, . _ , _ _ . , - - , , . , - - , , - -

Retrieved from "https://kanterella.com/w/index.php?title=ML20207R832&oldid=3318752"