ML20214N411
| ML20214N411 | |
| Person / Time | |
|---|---|
| Issue date: | 08/19/1986 |
| From: | Nussbaumer D NRC OFFICE OF STATE PROGRAMS (OSP) |
| To: | Kirner N WASHINGTON, STATE OF |
| Shared Package | |
| ML20214N389 | List: |
| References | |
| REF-WM-46 NUDOCS 8609160278 | |
| Download: ML20214N411 (1) | |
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AUG 1919pc Mrs. Nancy P. Kirner, Supervisor Waste Management Unit Department of Social and Health Services Mail Stop t.E-13 Olympia, Washington 98504 Dear Mrs.
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Enclosed for your information is letter dated August 8,1986 to J.W. Phillips, Westinghouse Hittman, from Charles Peterson of NRC, Waste Management concerning the " Solidification of THI Unit 2 Auxiliary Building and Reactor Building Sludges."
If you have any questions please contact Cardelia Maupin at 301-492-9888.
Sincerely, hM Donald A. Nussbaumer Assistant Director for State Agreements Program Office of State Programs
Enclosure:
As stated 5
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- # Illes WM-46/CHP/8/6/86/WM86572 1-Mr. 1.W. Phillips, Manager Process Engineering Westinghouse Hittman Nuclear, Inc.
9151 Rumsey Road Columbia, MD 21045 Re:
Solidification of TMI Unit 2 Auxiliary Building and Reactor Building Sludges j
Dear Mr. Phillips:
l Your letter of Juna 20, 1986 outlined a proposal to use the Westinghouse Hittman Cement Solidification Process to solidify sludges from Three Mile Island Unit 2 (TMI) having a total estimated sediment volume of 615 cubic feet. We requested comments on this proposal from within the Nuclear Regulatory Comission and the State of Washington as input to our comments.
While we have yet to hear from Washington, we do not consider that the information in the letter is sufficiently specific to support a finding that the proposal is acceptable. Specific comments are in Attachment 1.
We will provide State of Washington comments to you as soon as they are received.
Overall,Westinghouseshould(1)providemorespecificandquantitative information on solidification procedures, and (2) establish which formulation in the Topical Report is representative of the one to be used in tM proposed l
solidification or (3) treat the sludges as new wastes to be qualified by the full battery of stability tests.
I If you have any questions, please call Chuck Peterson on 427-4546 or Tim Johnson on 427-4088.
j Sincerely, Charles H. Peterson, Project Manager Materials Engineering Section Engineering Branch Division of Waste Management, NHSS
Enclosure:
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l WM86562/ ATTACH /CHP ATTACHMENT 1 NRC Coments on Proposal to Splidify Certain TMI Sludges 1.
The Westinghouse Hittman Cement Solidification Process has not yet been approved by NRC. Among the questions still to be answered is one dealing with stability of cement-solidified ion exchange resins as affected'by curing time. Laboratory work is underway at Brookhaven to provide further data on this question.
2.
A generic Westinghouse Hittman Process Control Progrart. (PCP) was received at NRC only recently (July 10,1986) and has not yet been reviewed. As this document is critical to the production of consistent waste forms, we desire to review it prior to making a decision on the adequacy of the proposed qualification testing.
3.
Implementation of this generic PCP would additionally require preparation of a PCP specific to the proposed application.
4.
Westinghouse should show why the proposed bead resin formulation given in the Topical Report is the most suitable for a sludge containing 40 to 50 weight % of particles smaller than 63 microns and only traces of bead resins. Normally, fines are deleterious to concrete strength.
5.
The comparison of compressive strength data on resin samples with data on sludge / silt samples will not necessarily provide assurance that the sludge / silt sample will pass the imersion tests. We disagree with your conclusion that processing of actual wastes could proceed after only 4 to 6 week immersion tests.
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WM86562/ ATTACH /CHP 6.
The range of bulk densities (1.06 to 3.5 g/cc) is extremely wide.
Wettinghouse Hittman should provide information on why such a wide range of densities was observed.
7.
Calculations suggest that to ensure the solidified waste foms will be at least within Class C the loading in some cases might have to be relatively low.
Since the resin formulation in the Hittman topical is intended for higher waste loadings, Westinghouse Hittman should provide additional information on the acceptability of the formulation for very low waste loadings.
8.
Westinghouse Hittman should provide more information to show that the simulated sludge / silt is representative of the waste to be solidified.
9.
Westinghouse Hittman should provide information as to the relative amounts of the sludges so that the concentrations of isotopes after consolidating the sludges can be estimated.
If a correspondence between the composite waste and one of those in the Topical Report cannot be established, then the sludge should be considered a new waste and the full battery of stability tests should be run.
- 10. The Westinghouse Hittman proposal indicates that testing will be perfonned on actual wastes. Please describe the tests which will be perfonned.
- 11. The proposal states that if actual tests indicate that there are substantial differences between the simulated and actual wastes, new testing will be performed using simulated waste compositions in Table 2.
It is unclear, however, how the information in Table 2 can be used to accomplish this. Westinghouse should provide additional infonnation on how the simulated composition will be generated.
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