ML20058F202
| ML20058F202 | |
| Person / Time | |
|---|---|
| Site: | 07109156 |
| Issue date: | 07/23/1982 |
| From: | Macdonald C NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS) |
| To: | |
| Shared Package | |
| ML20058F196 | List: |
| References | |
| NUDOCS 8207300340 | |
| Download: ML20058F202 (8) | |
Text
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Form fsRC418 U.S. fGUCLE AR REGULATORY COMMISSION (12 73)
. CERTIFICATE OF COMPLIANCE
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For Radioactive J4aterials Packages 1.(s) Certificate Number 1.(b) Revision No.
1.(c) Pack e Identif Pages No.
9156 0
USA /9 56/B(ication No.1 (d) 1
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1.(e) Iftal No. Pages
- 2. PREAMBLE 2.(a)
This certificate it issued to satisfy Sections 173.393a.173.394,173.395, and 173.396 of the Department of Transportation Hazardous Materials Regulations (49 CFR 170189 and 14 CFR 103) and Sectior** 146-19-10a and 146-19-100 of the Department of Transportation Dangerous Cargoes Regulations (46 CFR 146-149), as amended.
2.(b)
The packaging and contents described in item 5 bdow, meets the safety standards set forth in Subpart ic of Title 10, Code of Federal Regulations, Part 71," Packaging of Radioactive Materials for Transport and Transportation of Radioactive Material Under Certain Conditions."
f 2.(c)
This certificate does not relieve the consignor from compliance with any requirement of the regulafsons rif the U.S. Depytment of Transportation or other applicable regulatory agencies, including the government of any country throub or into which' the package will be transported.
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- 3. This certificate is issued on the basis of a safety 6nalysis report of the package design or application-
[
l 3.(a)
Prepared by (Name and address):
3.(b)
Title and identification of' report or application!
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Industrial Nuclear Company Industrial Nuclear Company application dated 1124 Chess Drive December 23, 1981, as supplemented' Foster City, CA 94404
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3.(c)
Docket No.
- 4. CONDITIONS Jhis certifkate h conditional upon the fulfilling of the requirements of Subpart D of 10 CFR 71, as applicable,'and the conditions specified in iter 15 besew.
- 5. Description of Packaging and Authorized Contents, Model Number, Fissile Clas-xlitions, and
References:
(a) Packaging (1) Model No.-
IR-50 (2) Description The Model No. IR-50 shippitig container is designed for use as a source changer, storage container, and Type B shipping container for radiographic sources in special form. The Model No. IR-50 source changer measures 8.875 inches long, 4.5 inches wide, and 8.5 inches'high.
The radioactive source assembly is housed in Zircalloy or titanium "S" tube. The "S" tube is surrounded by depleted uranium metal as shielding material. The depleted t,
uranium shield assembly is encased in a stainless steel housing. The void space between the depleted uranium shield assembly and the inner container is filled with a rigid polyurethane foam. The 45 pound source changer is centered by plywood supports within a 10 gallon (min 20 gauge) steel drum with a 12-gauge steel closure ring. The gross weight of the source changer and overpack is 70 pounds.
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(3) Drawfvi,s.
The pcN' ging is $castructed in cordance with Industrial Nuclear Company Drde,ing Nos.12A, Rev. -; 50-4,,Rev. -; and 50-4(A), Rev.
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(b) Contents 4'
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(1) Type and form of material f
a a Iridium 492 as/ sealed sources that meet the requirements of special form as{tiefindi in 10 CFR 571.4(o).
g (2) Maximum yJantity of material per package 120cuYies 6.
The source mbst be secured in the shielded position of the packaging by the shipping plati, source assembly,,and locking device., The shipping plug, source apsemb?y used'must be fabricated of materials capable of resisting a 1475 F fire envirorment for one-half hour and maintaining their positioning function.
The ball stop of the source assembly must engage the locking device. The flexible cable cf the source assembly and shipping plug must be of sufficient length and diameter, to pr, ovide positive positioning %the source in the shielded position.
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7.
Name plates on overpachmust be fabricated of materials capable of resisting the P
fire test of 10 CFR Part 71 an'd maintaining their legibility.
The two vent holes in the side of the overpack meseba covered with tape or rubber (plastic) plugs to prevent entry of rain waterP i
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s 8.
The packaging authorized by this:chrtificate is hereby approved for us'e under the general license provisions of'lG' CFR 671.12(b). t 9.
Expiration date: July 31, 1987; REFERENCES Industrial Nuclear Company applicar, ion dated December 23, 1981.
Supplement dated: May 28, 1982.
FOR THE U.S. NUCLEAR REGULATORY COMMISSION l-
^
Charles E. MacDonald, Chief Transportation Certification Branch l
Division of Fuel Cycle and Material Safety Date:
U.S. Nuclear Regulatory Commission Transportation Certification Branch Safety Evaluation Report Model No. IR-50 Packaging Docket No. 71-9156
SUMMARY
By application dated December 23, 1981, as supplemented, Industrial Nuclear Company requested design approval of the Model No. IR-50 source changer and overpack. Shielding of the 120 curies of Iridium-192 is provided by a minimum of 1.625-inch thickness of depleted uranium.
Containment is provided by the source capsule meeting the requirements of special form.
Based on the statements and representations contained in the application, and the (.onditions listed below, we have concluded that the Model No.
IR-50 source changer and overpack meets the perfonnance requirements of 10 CFR Part 71.
REFERENCES Industrial Nuclear Company dated December 23, 1981.
Supplement dated May 28, 1982.
DRAWINGS The packaging is constructed in accordance with Industrial Nuclear Company Drawing Nos. 2A, Rev. -; 50-4, Rev. -; and 50-4(A), Rev.
PACKAGING DESCRIPTION The Model No. IR-50 shipping container is designed for use as a source changer, storage container, and Type B shipping container for radiographic sources in special form. The Model No. IR-50 source changer measures 8.875 inches long, 4.5 inches wide, and 8.5 inches.high. The radioactive source assembly is housed in Zircalloy or titanium "S" tube. The "S" tube is surrounded by depleted uranium metal as shielding material. The depleted uranium shield assembly is encased in a stainless steel housing.
The void space between the depleted uranium shield assembly and the inner container is filled with a rigid polyurethane foam. The 45 pound source changer is centered by plywood supports within a 10 gallon (min 20 gauge) steel drum with a 12-gauge steel closure ring. The gross weight of the source changer and overpack is 70 pounds.
2-CONTENTS (1) Type and fonn of material Iridium-192 as sealed sources which meet the requirements of special I
form as defined in 10 CFR 571.4(o).
(2) Maximum quantity of material per package 120 curies.
CONTAINMENT The Iridium-192 is encapsulated in stainless steel which meets the requirements of special fann as defined in 10 CFR 571.4(o).
STRUCTURAL A.
General Standards for all Packaging Chemical and Galvanic Reaction The Model No. IR-50 has been designed and constructed of such materials that there will be no significant chemical, galvanic, or other reaction between packaging components or between packaging components and the package contents.
Positive Closure The source pigtail assembly in the Model No. IR-50 cannot be exposed without opening a key operated lock. Also, the drum lid of the outer container is held in place by a bolted closure ring.
The bolted closure ring has a lock nut and a safety wire. The package is thus equipped with a positive closure which will prevent inadvertent opening.
Lifting and Tie-Down Devices There is no system of lif ting or tie-down devices which are a structural part of the package.
B.
Structural Standards for Type B and Large Ouantity Packaging Load Resistance The Model No. IR-50 has been shown by test to be capable of withstanding statically five times of its fully loaded weight uniformly distributed along its length without generating stress in any material of the packaging in excess of its yield strength.
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. External Pressure The applicant has shown by analysis that the Model No. IR-50 design meets the regulatory requirements.
C.
Normal Conditions of Transport Heat The applicant has shown by test that the Model No IR-50 design can withstand the normal heat conditions of transport.
Cold The applicant has shown by test that the Model No. IR-50 design can withstand the normal cold conditions of transport.
Pressure The applicant has shown by test that the Model No. IR-50 design can withstand 0.5 times standard atmospheric pressure without any signs of disintegration.
In addition, a vent is on the upper area of the 10 gallon drum to provide a positive means for pressure relief of the outer container. A condition has been included in the approval to require the two vent holes to be covered during shipment to preclude entry of rain water into the overpack.
Vibration The vibration loading is judged not to have significant effects on packaging safety.
Water Spray Water spray will have no effe:t on the package.
Free Drop The applicant's evaluation of the Model No. IR-50 to meet the free drop requirement of 10 CFR Part 71 Appendix A is based on actual test results. The applicant has tested the packaging for three (3) orientations of impact. These three orientations at impact are:
top corner drop through the center of gravity onto the locking ring closure, bottom corner drop, and flat bottom drop. None of these tests resulted in any damage to the outer container or the Model No. IR-50 itself.
. Corner Drop Not applicable for this design case.
Penetration The applicant has shown that the package can safely withstand the penetration load by dropping a 1-1/4-inch diameter,13-pound hemischerical end steel bar from a height of 40 inches onto the end, the side, and the lock body. These tests resulted in no reduction of shielding effectiveness or. loss of radioactive material.
Compression The applicant has shown by test that this package is capable of withstanding a load of five times the package weight without generating stress in any material of the packaging in excess of its yield strength.
D.
Hypothetical Accident Conditions Free Droo The applicant's evaluation of the Model No. IR-50 to meet the 30-foot drop test of 10 CFR Part 71 is based on actual test results.
The applicant has tested the packaging for four (4) orientations of impact for the 30-foot drop test. These four orientations at impact are:
top corner drop through the center of gravity onto the locking ring closure, bottom corner drop, flat bottom drop, and flat top drop. These tests resulted in no deflection of contents, no lock body damage, no weld oamage, and no shifting of the source.
Puncture The applicant dropped the packaging on the side, bottom corner, locking ring closure, and bottom from a 40-inch height onto a steel bar of 6-inch diameter, 9 inches long, with a 1/4-inch radius at the contact end.
In all cases, the results indicate that the source remains undamaged and in place.
Thermal The staff agrees with the applicant's conclusion that stresses induced by differential thermal expansion and temperature increases have no significant effects on packaging safety.
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. THERMAL The applicant relies on the package performance under foam curing for 3 hours3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br /> at 250 F to demonstrate the package adequacy under normal conditions of 10 CFR Part 71. This does not account for the internal heat frcm the Ir-192 source capsule. The maximum 2 watt internal heat load is not significant.
The package was exposed to a 1475 F environment for 30 minutes.' The Model No. IR-50 was removed from its overpack for this test.
The foam in the housing decomoosed and escaped. A vent hole is provided to assure safe escape of foam decomposition products. After the test, the source was inserted to test the shielding performance; it was found adequate.
SHIELDING The applicant has demonstrated by measurements the adequacy of the depleted uranium shield for the Model No. IR-50 package under normal and accident damage conditions for the maximum Ir-192 loading of 120 curies.
The D0T normal condition of transport was shown to be satisfied by actual gamma profile measurements which gave dose rates well below the 200 mr/hr surface dose rate limit.
The applicant has shown by radiation profile that the depleted uranium shields remain in tact with no change in the shielding effectiveness when subjected to the accident damage conditions and, therefore, the subject containers satisfy the Part 71 accident radiation limit of less than 1000 mr/hr, three feet from the surface of the container.
The above results demonstrate satisfaction of 10 CFR 571.36 which has a permissible limit of 1000 mr/hr at 3 feet from the external surface of the package under accident conditions.
OPERATING PROCEDURES Compliance with Subpart D of 10 CFR 71 is discussed in the application.
Written procedures are identified for package use.
CONDITIONS 1.
The source must be secured in the shielded position of the packaging by the shipping plug, source assembly, and locking device. The shipping plug, source assembly used must be fabricated of materials capable of resisting a 1475 F fire environment for one-half hour and maintaining their positioning function.
The ball stop of the source assembly must engage the locking device.
The flexible cable of the source assembly and shipping plug must be of sufficient length and diameter to provide positive positioning of the source in the shielded position.
. l 2.
Name plates on overpack must be fabricated of materials capable of resisting the fire test of 10 CFR Part 71 and maintaining their legibility. The two vent holes in the side of the overpack must be covered with tape or rubber (plastic) plugs to prevent entry of rain water.
C_0NCLUSION I
Based on our review, the statements and representations contained in the application and the conditions listed above, we find that the Model No.
IR-50 package meets the requirements of 10 CFR Part 71.
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Charles E. MacDonald, Chief Transportation Certification Branch Division of Fuel Cycle and Material Safety, NMSS Date: JUL 2 31982