ML20054F466
| ML20054F466 | |
| Person / Time | |
|---|---|
| Site: | 07106679 |
| Issue date: | 05/19/1982 |
| From: | Hipsher W U.S. ECOLOGY, INC. (FORMERLY NUCLEAR ENGINEERING |
| To: | Macdonald C NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS) |
| References | |
| 20748, NUDOCS 8206160437 | |
| Download: ML20054F466 (8) | |
Text
l U3 Ecology, Inc.
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Mr. Charles E. MacDonald, Chief ii-U. S. S.,,.,,
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Docket No. 71-6679 2
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r-lialf Supertiger Shipping Package 8
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Dear Mr. MacDonald:
f This letter is in reference to US Ecology's Half Supertiger package h/h registered under Certificate of Compliance No. 6679.
We have recently the results of the engineering evaluation performed by Nuclear Packaging regarding the 25 psig external pressure requirements. Results of this analysis indicate that the Argonne Transportation Shield will not withstand an external pressure of 25 psig.
In the analysis of the Argonne Transportation Shield, the inner and outer steel plates and the lead shielding were considered to act independent. No consideration was given to the possible adhesion of the lead to the steel plates, also no consideration was given to the resistance from deflection created by the waste bins and dunnage that is loaded into the shield.
The question regarding the 30 foot drop test requirement was addressed briefly by Nuclear Packaging looking only at the Argonne Transportation Shield.
It was determined that the momentum from the lead would possibly cause sepacation of the inner and outer plates upon impact. Again, no consideration was given to the resistance created by the waste bins and dunnage that is loaded within the shield and/or Half Supertiger. The Half Supertiger body, based upon the full Supertiger test, has been shown to withstand a drop of 30 feet and maintain its closure.
The Half Supertiger under this revised C of C has been considered an overpack to provide impact resistance only.
Enclosed is US Ecology's proposed Certificate of Compliance which has been rewritten based upon the above findings. Please note that Mode A has essentially been changed to reflect the utilization of the Half Supertiger to that currently authorized for the Supertiger.
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page 2 Charles E. MacDonald Mode B (Half Supertiger and Argonne Transportation Shield) has been rewritten to provide utilization of the unit for specific waste streams. Stringent packaging procedures must be followed prior to utilization of the unit in this mode. These procedures provide a total of five (5) containment barriers and three (3) additional impact or puncture resistant barriers. Therefore, based on these stringent pack-aging requirements, US Ecology requests to utilize the unit for those waste streams outlined in the proposed certificate of compliance.
In addition to those waste streams identified for use in Mode A and Mode B, other applications may need to be addressed on a per case basis. The certificate of compliance will then be modified to address those wastes based upon your review and approval.
If you should have any questions, please do not hesitate in contacting us.
Sincerely,
- W W.M. Hipsher Manager Corporate Safety
PROPOSED CERTIFICATE OF COMPLIANCE NO. 6679-HALF SUPERTIGER 5.
Description of Packaging and Authorized Contents, etc, (a) Packaging (1) Model No.: '6679 (2)
Description (i) Mode A A protective overpack which provides containment, impact resistance and' thermal resistance for its contents. The containment vessel (cavity). is -
approximately 76" x 76" x 85" constructed of 3/16" thick aluminum plate with silicone rubber gasket.which is bolted to the containment vessel. A pressure fitting with cap on the closure plate provides a means for leak testing. The containment vessel is centered and supported in an outer 3/16" thick steel jacket by.approximately 17" of polyurethane foam insulation at the end and 10" on the sides. A removable section or cap consisting of approximately 18" of polyurethane foam insulation encased in steel with silicone rubber gasket is bolted to the main outer steel jacket. The overall dimensions of the packages are approximately 96" x 96" x 120".
Vent holes are provided on the sides and ends df the container.
Set into each corner of the outer container are standard I.S.O. steel castings. The maximum total weight including weight of the contents'is 45,000 pounds.
(ii) Modc B A protective overpack which provides containment, impact resistance and thermal resistance for its contents. The overpack is identical to that described in (2) (1) above, except without the aluminum cover on the in-ner containment vessel. A lead shield cask (Argonne Transportation Shield) fits within the overpack and serves as an inner containment vessel. An ANL waste storage bin fits within the shielded cask.
The gross weight of the entire unit is approximately 45,000 lbs. with 41 3000 lb. pay load.
(3)
Drawings Packaging is constructed in accordance with Protective Packaging, Inc.,
Drawing Nos. 32106-3, Sheet 1, Revision F and 32106, Sheet 2.
Argonne Transportation Shield is constructed in accordance with Drawing Nos.
32269, 32268, Revision A and 32270,, Revision A.
ANL Waste storage bin is constructed in accordance with Drawing No. CS 2273.
(b)
Contents (1)
Mode A (1)
Large, decontaminated equipment waste of such size as not to fit into
~
a 55-gallon drum (with legs or other readily removable appendages removed). Not to exceed 200 grame special nuclear material within the package.
Equipment waste surfaces containing more than 0.5 Ci must be decon-2 taminated to a smearable level of no more than 150,000 dpm/100 cm prior to fixation or until successive decontamination cleaning oper-
~
Page 2 ations do not reduce the smearable contamination levels by more than ten percent. After fixation, equipment waste surfaces must have a smearable level of contamination of no greater than 10,000 dpm/100 2
cm.
Outer surfaces must have a smearable level of contamination 2
of no greater than 20 dpm/100 cm. Prior to fixing of contamination, large equipment waste must be inspected to ensure that:
(a) all sharp or protruding objects have been removed, blunted or protected with packaging material, and (b) pipe caps, gasketed blind flanges, covers, etc., have been installed wherever possible. Following such inspection, the inner surfaces containing more than 0.5 C1 must be fixed with
" strip" or " clear" coating. The inner surface (s) may alternatively be fixed with a polyurethane foam.
The large equipment waste must be enclosed in a tight-fitting, 3-inch thick plywood box or a tight fitting 3/16" thick corrugated steel' box.
The space betdeen the equipment and the box must be filled with foam (l" minimum foam thickness) and between equipment -(1/2" minimum foam-thickness).
4 Alternatively, glovebores contaminated and' fixed as described above may be broken down as follows:
Glovebox windows are removed and separately packaged in 12-mil thick PVC bags and sealed. The inner bag is tape sealed and the outer bag-is heat sealed.
Glovebox panels must be cut to dimensions to fit inside a 3/16" thick l
corrugated steel burial crate. All sharp or protruding objects are re-moved, blunted, or protected with packaging material. The glovebox panels are bundled such that internal box surfaces are facing inward.-
Cut glovebox panels from not more than one glovebox are banded with metal strap banding 'such that two metal strap bands in each direction I
are placed around the length and width of the glovebox sections. The glovebox window and cut panel packages are enclosed and foamed in place within the box.
Blocking or dunnage is placed within the box ^to ensure a one inch foam barrier on the sides and bottom of the box.
Likewise, dunnage is provided between the banded glovebox sections to maintain a 1/2" thick foam barrier between banded packages.
(ii)
Decontaminated hard waste items, such as equipment, metal cans, tools, ate., must be double bagged within 12-mil thick PVC with each bag heat sealed. The total special nuclear material quantity of all the sealed packages in one container must not exceed 200 grams.
Hard waste surfaces must be decontaminated to a smearable level of no 2
more than 150,000 dpm/100 cm prior to fixation or until successive decontaminat. ion cleaning operations do not reduce the smearable contamination levels by more than 10 percent, After fixation, hard waste surfa:es must have a smearable level of contamination of no 2
greater thal 10,000 dpm/100 cm. Prior to fixing of contamination, hard waste must be inspected to ensure that sharp or protruding objects have been removed, blunted, or protected with packaging material. Following such inspection, the outer surfaces must be fixed with " strip" or " clear" coating. Hard waste items such as furnace
Page 3 shells, muffles, or other items with large cavities not accessible for decontamination must be filled with foam within the cavities. Surfaces that are not easily accessible, e.g., interiors of small diameter tubing and piping which were in contact with process materials must have been swabbed or immersed in c19aning solution to ensu,re removal of residual material. Open ends of the t2bing and piping must-be sealed using mechanical fittings.
i Alternately, large heavy walled process glassware must be painted inside and outside to fix contamination and double bagged ih 12-mil thick PVC with each bag heat sealed. The glasswafe must beisecured in a box and the box must be filled with foam and total activity limited to less than two (2) Ci in a box, s
Alternately, stainless steel transfer tubes and HEPA filters must be double bagged in 12-mil thick PVC with each bag heat sealed. The tubes / filters must be secured in a box.
The box must be filled with foam and total activity limited to less tha#n 0.5 Ci in a box.
J Alternately, round steel ducting must be' capped and secured in a box.
Outer surfaces ducting will have a smearable level of contamination no 2
greater than 20 d/m/100 cm. The box must be filled with foam and total activity limited to less than 0.5 Ci in a box.
Scaled packages and boxes of hard waste must b'e enclosed in a tight-fitting, 1-inch thick plywood box or a tight-fitting 3/16" thick cur-rugated steel box.
The space between the packages and the box must be filled with foam to a minimum thickness of 1 inch. Void spaces between i
the sealed packages must be filled Vith foam (1/2" minimum foam thick-ness).
(iii)
Glove box absolute (HEPA) filters must be double bagged within 12-mil thick PVC, with each bag, heat sealed and packaged within DOT Specification 17H or 17C steel drums (maximum size of 55 gallons).
Each drum must be lined with a sealed plastic liner and eqt'ipped with a standard drum closure. Each drum must not exceed a spectal nuclear material quantity of 60 grams.
Scaled drums must be enclosed in a tight-fitting 1-inch thick plywood box.
The space between the drums and the box must be filled with foam to a minimum thickness of 1 inch. Void spaces between drums must be filled with foam (1/2" minimum foam thickness).
(iv)
Soft waste items such as she cir
<Joves, paper, prefilter media, polyethylene bottles, sP ve etc., must be double bagged in 12-mil thick PVC, with eat, i..
saaled (bag size must'not exceed 22" x 16" x.'.0")
and packages with... DOT Specification 17H or 17C steel drums (maximum size of 55 gallons).
Each drum must be lined with a scaled plastic liner and equipped with a standard drum closure.
Each drum must not exceed a special nuclear material quantity of 60 grams.
Sealed drums must be enclosed in a tight-fittina 1-inch thick plywood box or a tight-fitting 3/16" thick corrugated se.eJ1 box.
The space t
Page 4 between the drums and the box must be filled with foam to a minimum thickness of 1 inch. Void spaces between drums must be filled with foam (1/2" minimum foam thickness).
(v)
Liquid waste must be solidified in concrete in a 30-gallon drum which must be sealed in a plastic bag and centered and supported in a DOT Specification 17H or 17C 55-gallon steel drum by absorbent material.
The 55-gallon drum must be lined with a sealed plastic liner and equipped with a standard drum closure. Each drum must not exceed a fissile quaatity of 60 grams.
Alternatively, liquid waste is solidified in concrete in maximum size one (1) gallon containers which are double bagged and heat sealed in 12-mil thick PVC and placed within a DOT Specification 17H or 17C 55-gallon steel drum.
The 55-gallon drum is lined with a sealed plastic liner and equipped with a standard drum closure.
Each drum does not exceed a special nuclear material quantity of 60 grams.
Sealed drums must be enclosed in a tight-fitting 1-inch thick plywcod box or a tight-fitting 3/16 thick corrugated steel box.
The spa a between the drums and the box must be filled with foam to a miniri am thickness of 1 inch. Void spaces between drums must be filled w;.th foam (1/2" minimum foam thickness).
(2)
Mode B (i)
Type and form of material:
Radioactive material including fissile material as solids in normal and special form packaged in DOT 17H 30 gallon drums.
(See below for packaging procedures). For a detailed description of the waste forms, refer to Appendix 1.
'iis Maximum quantity of material per package:
No package of waste will weigh in excess of 200 lbs. The total of all fissile isotopes and alpha emitters contained in any single package will not exceed 100 g. or the mass equivalent of 6.2 curies, whichever is the lesser mass.
(iii)
Packaging Procedures (aa)
DOT 17 H 30 gal drums are packaged as follows:
External Container - DOT-17H 30-gal drums.
First Inner Container - Heat sealed 20-mil PVC pouch.
Second Inner Container - Blow molded, open top, 1/8-in. thick polyethylene drum liner-puncture guard. This container's cover is a 1/16-in. thick polyethylene disc.
Third Inner Container - Heat sealed 20-mil PVC pouch.
Fourth Inner container - Steel drums, 26 gage, 15-in. OD, gasketed cover with toggle clamp-ring closure. These containers can be of 8,12, or 16-in. height.
The 30-gal drum will contain one of the following combinations of these sizes.
page 5 a.
One 16 plus one 8 (10 + 5 gal) b.
Two 12's (7 + 7\\ gal) c.
Three 8's (5 + 5 + 5 gal)
(bb) The 30 gal drums are placed in the ANL waste storage bins.
Drums are packaged in two 5 drum layers separated by \\ in.
plywood with foam dunnage placed on two sides to ensure tight fit.
(cc) The ANL bin is placed within the Argonne Transportation shield.
Its gasketed lid is bolted and shield is then pressure-tested for proved closure. Dunnage is placed around the shield to ensure close fit within the Half Supertiger.
(dd)
The shield is then placed within the Half Supertiger.
6.
The maximum decay heat generation per package must not exceed:
(i) 15 watts and the heat sources are distributed throughout the cavity such that 0
the temperature at any point within the cavity does not exceed 200 F or (ii) 104 watts provided combustible solids or liquids are not present and the heat sources are distributed throughout the cavity such that the internal surface 0
temperature of the cavity walls will nowhere exceed 350 F.
(iii) 157 watts provided the ANL waste storage bins and transportation shield are used, combustible solids or liquids are not present and the heat sources are distributed throughout the cavity such that the internal surface temperature of the cavity wall 0
will nowhere exceed 350 F.
7.
Protrusions from Type A packaging such as lifting eyes, etc., shall be positioned such that they will not contact the cavity walls, or shoring shall be provided to prevent puncture of the cavity walls by the protrusions under the normal and accident conditions.
8.
Radiation shielding as required shall be an integral part of the Type A packaging.
9.
Contents shall be positioned in the cavity such that the center of gravity of the loaded package is substantially the same as the center of gravity of an empty package.
10.
A leak test shall be conducted of each Model No. 6679 packaging prior to delivery to a carrier for tr6nsport to ensure that it is properly sealed. Where the Argoane Trans-portation Shield is used, the leak test may be conducted on the Argonne Transportation Shield in lieu of the Model No. 6679 packaging, 11.
Prior to each shipment the containment vessel silicone rubber gasket shall be inspected.
The gasket shall be replaced if inspection shows any defects or every tuelve (12) months, whichever occurs first.
l APPENDIX I Combustibles Gloveport gloves and 0-rings, neoprene Bottles: polyethylene and polypropylene Tubing: Polyvinyl chloride, polyethylene, rubber, styrene butadiene Bagging Pouches: polyvinyl chloride, polyurethane, polyethylene 0-rings: neoprene, silicone, teflon Paper products: tissues, cardboard, towels Rags:
cotton, mixed synthetics Sheeting: polyethylene, polyvinyl chloride Wood products: plywood, chipboard, masonite Gaskets neoprene, toroseal, rubber Plastics:
epoxy', phthalates, phenol-formaldehyde, polystyrene, cellulose acetate, and cellulosic matarials Noncombustibles Ferrous Metals: carbon steel, stainless steel, cast iron. Wrought and cast forms.
Noaferrous Metals: aluminum, brass, bronze, copper, lead, tin.
Wrought and cast forms.
Glass: bottles, tubing, beakers, plates.
Ceramics:
firebrick, porcelain insulators, quartz, vycor, boron nitride Passivated Chemicals: Vermiculite and pelletized clay containing evaporation residues from alcohol dissolution of sodium and NaK.
This material is rendered totally liquid-free by evaporation and baking.
Neutralized acids from metal-lographic etchant solutions are also evaporated to dryness af ter mixing with vermiculite and pelletized clay. Oxidizing acids and other oxidants in metallographic etchant solutions are chemically reduced to prevent the forma-tion of oxidizing salts when the solutions are evaporated in the absorbents.
Radioactive material: 75% UO2 (which contains U-235, to an average of 60% enrich-ment) and 25% PuO -
2