ML20211L482
| ML20211L482 | |
| Person / Time | |
|---|---|
| Site: | 07001193 |
| Issue date: | 11/21/1977 |
| From: | Browne W NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS) |
| To: | |
| Shared Package | |
| ML20211L396 | List: |
| References | |
| FOIA-86-281 NUDOCS 8607020090 | |
| Download: ML20211L482 (4) | |
Text
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Distribution:
IDocket File PCR R
NMSS R/F~
LPOR FCRR R/F W3rowne Docket No. 70-1193 Branch File Shafer License No. SNM-ll74, Amendment No. 1 JBMartin IE HQ (2) hg RhStarostecki cc: CPeck, APPLICANT:
Kerr-McGee Nuclear Corporation FACILITY:
Plutonium Fuel Fabrication Plant, Cimarron Oklahona
SUBJECT:
SAFETY EVALUATION REPORT - LICENSE AM9NDMENT APPLICATION FOR DECONTAMINATION, DISASSEMBLY AND SHIPMENT OF OBSOLETE FLOCULATION EQUIPMENT TO C0tfiERCIAL BURIAL, SY THE KERR-MCGEE NUCLEAR CORPORATION, CIMARR0N, OKLAHOMA-LICE 5SE NO SNM-ll74, DOCKET NO. 70-1193, AMENDHENT No. 1 Discussien:
License No. SNM-1174 was renewed on July 15, 1977, authorizing the I
Kerr-McGee Nuclear Corporation to maintain their plutonium fuel fabrication plant in standby status.
No special nuclear material is to be processed and the special nuclear material onsite is to be possessed only.
Kerr-McGee has been studying plans for the decontamina-tion and decomissioning of the plant, but has not made a final decision on how far they want to 90 in their commitment to the decomissioning of the plant. They have indicated that some of the contaminated equip-ment in the plant would not be used again, if the plant were re-activated.
so they would like to dispose of it by taking the equipment out and placing it in a shipping container, then sending it to a comercial burial site. By actually going through the disposal process with the obsolete equipment, Kerr-McGee personnel believe they will have a better basis for defining their decontamination and decomissioning program, and for estimating the cost in terms of manpower and dollars.
The equipment they have chosen is a low level waste floculation system that has not been used since April of 1975. The internal surfaces of thequipment are contaminated with plutonium, but nondestructive assay techniques have indicated that less than a gram of plutonium is i
in the equipment. Their intent is to keep all of the plutonium contamina-
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tion inside the equipment and use blanks, pipe caps and other sealing systems for assuring that contamination stays in the piping and equipment when the system is disassent> led. The estimated volume of waste is 400 cubic feet, the estissted weight of equipment in the floculation system is 6500 posnds and the project will require an estimated 500 man hours.
Although most of the disassembly work will be done by plant maintenance personnel, and the surveHlance will be done by the plant health physics y
g.y. p rsonnel, ad<ittional exper ienced personnelareavailablefromothef W a *=F Qirr-McGee facil.ities,_i f_ they-are-neede, f.
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The project work is divided into seven subgroups of effort and work will be performed primarily on the day shift. The radiation / contamination will be controlled by Kerr-McGee's Special Work Permit (SWP) system.
The SWP is prepared by the maintenance supervisor and is reviewed, conditions stipulated, and then approved by the Health Physics Supervisor.
A separate SWP is required for each job and it requires validation on each work shift appitcable to the job. Anytime that conditions change, which causes further work beyond that authorized, it requims that a new or supplemental SWP be prepared and approved, to cover the new conditions. Since nondestructive assay measurements show that less than one gram of plutonium is in the floculation system equipment, nuclear criticality safety controls will not need to be applied.
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Equipment Reauval:
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The obsolete equipment to be ' removed consists of the large vacuum filter of the floculation system, a glove box from the liquid solidification system, small feel tanks, small pumps and about 200 feet of piping that is between 1/2 inch and 4 inches in diameter. The equipment removal sequence j
will be:
1.
The 2 ft. diameter by 2 ft. tall feed tank located above Tank 185, and about 15 ft of small diameter pipe that served the " Tiger Loc" glove box.
2.
The 2 ft. by 3 ft. " Tiger Loc" glove box, its 3 ft. tall supporting i
stand, and any connected piping. Lengths of pipe, small parts, contaminated plastic, etc. will be " bagged into" the glove box and fixed in position so they will not shift within the box, during transit to the consnercial burial site.
3.
Two 3 ft. tall by 2 ft. diameter open top floc make-up tanks (Nos.187 and 188) and one 31/2 ft. tall by 21/2 ft diameter open top floc storage tank (No.186), pump No. PP 065, and about 120 ft. of 1/2 inch to 1 inch diameter piping. These three open tanks will be filled with bagged parts, contaminated plastic, etc.
and a plywood or sheet metal cover will be boltod on the tank top to contain all the material loaded into it.
4.
A 3 ft. tall by 1 1/2 ft diameter tank (No.191), which Kerr-McGee may or may not remove, pump No. PP 066 and about 60 ft of 1/2 inch to 4 inch diameter piping.
If tank No.191 is removed, it may also be filled with contaminated pipe, etc. before it is sealed up.
5.
A 3 ft. tall by 2 ft. diameter tank (No.190), and about 20 ft. of 1/7 inch tn 1 1/2 inch diamatse nininn l
6.
The-ftoc' vaccanrfttter (fW-17410), ~wi1-1-have-itrattached motors, niping._ pumps _and_othe*_aqui-at removed nr disc )nnec_ tad _and til
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- openings to the filter sealed. Protruding steel parts that could interfere with transport will be cut off and the sealed unit, which weighs about two tons, will be hoisted out of B-02 and transported to Room 128.
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The vent exhaust piping to the " Tiger Loc" glove box and the piping to the floc vacuum filter will be disconnected and removed for disposal to the commercial burial site.
Contamination Control The outer surfaces of the floculation system equipment are essentially contamination free, and only the internal surfaces are known to be contaminated with very small amounts of plutonium.
In general, low level liquid wastes in the equipment contained about 0.0003 gram per liter plutonium solutions, but it did not exceed 0.003 grams per liter j
of plutonium.
7i Kerr-McGee intends to use the equipment, including the piping as the primary containment system fcr the contamination. To the best of their knowledge, Kerr-McGee believes that there is no liquid in the equipment or the piping system, but to assure that unknown liquids will not run out when pieces of equipnent are disconnected, the Nash vacuum pump system will be used to draw air an.d liquids toward the vaccum receiver tank. Any liquid collected will be solidified with portland cement and sent to commercial bubial.
I When pipe lines are disconnected, cut in two, or taken apart at fittings, a bagging technique will be used to completely contain any contamination.
Loose fitting plastic.5.s affixed above and below the point of separation, forming a bag around the equipment. Tools are put in the bag before the bag is sealed and they are used to separate the pipe. When the separation is made, the loose section of pipe is turned to twist the bag tightly shut at each separation point. The twisted section is wrapped with vinyl tape and the bag cut through in the taped area.
The floc vacuum filter will be enclosed within a plastic tent that is called a " greenhouse." An industrial vacuum with a HEPA filter and a floor air exit, will draw air through the enclosure from outside of the enclosure. The area inside the " greenhouse" will be considered control zone No. 1.
Innediately outside of the greenhouse entrance will be control zone No. 2, where outer protective clothing is removed. Adjacent to control zone No. 2 but on the other side of a step-off line is control zone No. 3 which will used for complete personnel monitoring.
While the work is being performed, the quantity of air being supplied to the buildi ng rooms will be increased
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supply fans and two exhaust fans. Proper air flow direction will be maintained. The six stationary general air samplers in Room B-02 will be in use and at least one movable constant air monitor and an alarm will be operating during the work period. At least 50% of the personnel working in Room B-02 will wear lapel air samp!urs. Surface contamination monitoring shall be perfonned according to Kerr-McGee's internal procedure KM-Np-10-66 and nasal smears od bioassay sampling shall be performed according to Kerr-McGee's internal procedure KM-NP-10-67.
Packaging the Equipment for Shipment and Burial Wooden boxes meeting Department of Transportation (DOT) 19A or 198 specifications and metal drums meeting D0T 17H specifications will be used to package the equipment and other contaminated wastes generated i
by this project.
Each completed package will be NDA measured to I
determine the maximum amount of plutonium present in the package. The outer surface of each packagg shall have contamination levels that do not exceed 500 dpm per 60 cnf fixed, and/or 100 dpm/100 cm2 removable, prior. to their being loaded into NEC0's Supertiger.
Nuclear Engineering Co.
will receive the package. Appropriate shipping papers, labeling, marking and placarding shall be provided.
i Conclusion The removal, decontamination, packaging and disposal of the obsolete floc vacuum filter system equipment has been carefully planned by
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i Kerr-McGee and based on our review of theirtermination plan, Part I, l
the proposed controls, surveillance and audit system are judged to be adequate for the safe and successful dismantling and packaging of the equipment. There will not be any nuclear criticality safety problem since the NDA measurements show that there is less than one gram of plutonium in the system. The radiation / contamination problems associated i
withtthe work will be controlled by approved Kerr-McGee procedures and administrative controls.and are judged to be within the experience capa-i bilities of the personnel who will perform the work. Region III has been I
contacted and their review of the termination plan, Part I, did not result in any suggestions for change.
It is reconnended that Amendment No. I to License No. SNM-1174 be approved.
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W. G. Browne Fuel Reprocessing and Recycle Branch Division of Fuel Cycle and Material Safet A
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