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REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICESSAFETY EVALUATION OF SEALED SOURCE

(AMENDED IN ITS ENTIRETY)

NQ: CA406S102S DATE: Febmary 1,1996 PAGE: 1of8

SEALED SOURCE TYPE: Utility Neutron Source

MODEL: N-252

. .

MANUFACTUREPJDISTRIBUTOR: Isotope Products Laboratories1800 North Keystone StreetBurbank, California 91504

(818) 843-7000

ISOTOPE: Californium 252 MAXIMUM ACTIVITY: 5 millicuries

!

LEAK TEST FREOUENCY: Six (6) months

PRINCIPAL USE: General Neutron Source Applications ( F )

CUSTOM SOURCE: YES X NO

9605130377 960417PDR STPRG ESGGEN

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! REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES| SAFETY EVALUATION OF SEALED SOURCE;

j (AMENDED IN ITS ENTIRETY)i

HQ: CA406S102S DAIE: February 1,1996 P. AGE: 2 of 8|

SEALED SOURCE TYPE: Utility Neutron Source

DESCRIPTION:

This series of sources is doubly encapsulated and constructed of Type 304 or 304L stainless steel.Both capsule types (A3014 and A3004) are 1.43" long x 0.37" diameter, with o.ne end having a 10-32 thread. Both primary and secondary encapsulations are sealed by fusion (electron beam) welding.The chemical form of the active element is oxide in ceramic, aluminum, or palladium metal wire.' '

Both the A3004 and A3014 capsules are designated as "Special Form" and have been issued aSpecial Form Certificate, Number USA /0351/S.

LABELING:

The source is engraved with "IPL", Cf-252, nominal activity, and serial number.

:

DIAGRAM:

See drawing numbers 3004 and 3014 on pages 7 and 8.

| CONDITIONS OF NORMAL USE:!

The Model N-252 neutron sources will normally be installed in gauging devices, well logging tools,or used by health physicists and research scientists for checking neutron detector function.

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PROTOTYPE TESTING:

Prototype sources of the Model N-252 design have undergone performance testing in accordance,| with ANSI N542-1977 and passed the tests which gave the following ANSI classifications:|'

Capsule ANSI N542-1977 ANSI N542-1977Classification Recommended Unnce

1-

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'A3014 77C66535 Gamma Gauging & Oil well logging *.A3004 77C66535 Gamma Gauging & Oil well logging *.

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REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES 1SAFETY EVALUATION OF SEALED SOURCE

(AMENDED IN ITS ENTIRETY)

HQ: CA406S102S DATE: February 1,1996 P. AGE: 3 of 8

SEALED SOURCE TYPE: Utility Neutron Source

PROTOTYPE TESTING:(cont'd)

For use in down-hole applications, each production source will be pressure tested to 25,000*

PSIG minimum. This requirement 'does not apply to those used for gamma gauging,calibration or research applications.

EXTERNAL RADIATION LEVELS:i

The radiation level of the Model N-252 source will vary with activity. Listed below are the radiationlevels for a 1 mci Model N-252 source. Gamma exposure rates were detennined by measurement

i using a Keithly Model 36100 ion chamber at 30 cm (from the source to the effective center of thej chamber) of a 590 uCi source, correcting for 1 mci activity, and calculated using the inverse square

law for the 5 cm and 100 cm distances. Neutron dose rates were calculated from a measurementusing an Eberline ASP-1 neutron monitor at 100 cm of a 590 uCi source, correcting for 1 mciactivity, and calculated using the inverse square law for the 5 cm and 30 cm distances.

Distance from source

Nuclide Activity 1sm 30 cm 100 cm

Gamma exposure rates (mR/hr)

Cf-252 1 mci 73.1 2.03 0.183

Neutron dose rate (mrem /hr)

Cf-252 1 mci 744 20.7 1.86

Total in mrem /hr: (assuming 1 R/hr = 1 mrem /hr for gamma rays)

! Cf-252 1 mci 817 22 2|

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REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICESSAFETY EVALUATION OF SEALED SOURCE

(AMENDED IN ITS ENTIRETY)

EQ: CA406S102S DATE: February 1,1996 P. AGE: 4 of 8

SEALED SOURCE TYPE: Utility Neutron Source

OUALITY ASSURANCE AND CONTROL:

Program Description: The IPL Quality Assurance Manual (current copy on file with this issuingIagency) contains details of the quality control procedures of these sources starting from raw

materials to finished products. The program is designed to satisfy 10CFR Part 50 (B) and meets therequirements ofISO 9001. The program covers drawing control, pre-production design review,purchasing, training, calibration records, source numbering, incoming raw materials, assay qualitycontrol, leak testing, document control, and confirming orders. Specific elements are listed below:

A. Activity: Held to * 15% ofnominal activity

B. Assav procedures: The neutron output is measured, using a suitable neutron detector, againsta source whose neutron output and activity was determined by the NIST.

C. Radiopurity determination: Determined by gamma or alpha spectrometry of the source orthe radionuclide batch,

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D. Leak test orocedures: Sources are either leak tested according to the " Immersion With 4Boiling Test" taken from ANSI N5421977 Appendix A A2.1.3, or the immersion test fromAppendix to ANSI N44.2-1973 "American National Standard for Leak Testing RadioactiveBrachytherapy Sources" followed by a moist wipe test. The criteria for acceptance are 1.0nCi removeable beta / gamma 0.1 nCi removeable alpha.

LIMITATIONS AND/OR OTHER CONSIDERATIONS OF USE:

a. Distribution: These sources shall be distributed only to specific licensees of the NRC orAgreement States,

b. Leak Test: 'Ihese sources shall be tested for leakage and/or contamination at intervals not toexceed six (6) months. Such tests shall be able to detect 0.005 pCi of removable radioactivematerial, and be performed only by specific licensees of the NRC or Agreement States.

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REGISTR'Y OF RADIOACTIVE SEALED SOURCES AND DEVICESSAFETY EVALUATION OF SEALED SOURCE

(AMENDED IN ITS ENTIRETY)

HQ: CA406S102S DATE: February 1,1996 EA.QE: 5o.f8

SEALED SOURCE TYPE: Utility Neutron Source.

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

c. .tist: These sources are intended to be used by trained personnel in measuring response ofneutron detectors or for use in gauging devices and as components in well logging tools.'Ihey should not be subjected to conditions of normal use exceeding their respective ANSIN542-1977 ratings.

d. Handline: Remote handling tools and localized shielding, including neutron thermalizingmedia, should be used to avoid the high exposure potential from sources containing more ithan a few microcuries,

e. Storace: Store in original shielded container provided by the manufacturer or in anassembled device.

f. Cleanine: Sources may be cleaned with alcohol or water with a mild detergent.

g. Disposal: Decayed or otherwise unusable sources must be disposed ofin accordance withthe licensee's disposal procedures (eg. transfer to a specific licensee).

h. This registration sheet and the information contained within the references shall not bechanged without the written consent of the California Department of Health Services.

SAFETY ANALYSIS SUMMARY:

Based on our review of the information and test data provided, we conclude that the Model N-252scaled sources are acceptable for licensing purposes and the intended uses specified in this registrycertificate. This series of sources has passed performance tests exceeding those required for" Gamma gauges (medium and high energy)", " General neutron source application (excluding reactorstart up)", and " Oil well logging" as defined in NBS Hanbook No.126 (ANSI N542 -1977). Themanufacturer states that since the Model A3014 capsule passed the physical tests for an ANSIclassificaton of 77C66535, and since the A3004 is very similar in construction, this agency concursthat the Model N-252 sealed source be given a rating of 77C66535.

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REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICESSAFETY EVALUATION OF SEALED SOURCE

|

(AMENDED IN ITS ENTIRETY)

HQ: CA406S102S DATE: February 1,1996 PAGE: 6 of 8

SEALED SOURCE TYPE: Utility Neutron Source

REFERENCES:

The following supporting documents for the Model N-252 sealed source are hereby incorporated byreference and made part of this registry certificate:

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1. Isotope Products Laboratories Quality Assurance Manual (on file with this issuing agency).

2. California Registry Certificate No. CA406S102U dated December 23,1970.

2. Isotope Products Laboratories letter dated September 9,1991 regarding external radiationlevels. '

3. Isotope Products Laboratories letter dated November 2,1994 with attached draft registrationcertificate, test data and drawings.

DATE: k 1 VM REVIEWED BY: F'Robert R. Re%s

DATE: [Nwo k//[[ CONCURRED BY:/ B KapYe '

ISSUING AGENCY: Califomia Departemnt of Health Services

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REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES.

SAFETY EVALUATION OF SEALED SOURCE

(AMENDED IN ITS ENTIRETY)

:NQ: CA406S102S DATE: February 1,1996 PAGE: 7 of 8

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REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES*

SAFETY EVALUATION OF SEALED SOURCE

(AMENDED IN ITS ENTIRETY)

EQ: CA406S102S DATE: February 1,1996 PAGE: 8 of 8

SEALED SOURCE TYPE: Utility Neutron Source !

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SUPERCEDES OWG NQ 327

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Material of the shell: stainless steel Z3QND 18/12(316 L)iL

Arc welding under argon shield.

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