ML20236X689
| ML20236X689 | |
| Person / Time | |
|---|---|
| Issue date: | 11/24/1987 |
| From: | Tokar M NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS) |
| To: | Ebenhack D CHEM-NUCLEAR SYSTEMS, INC. |
| References | |
| REF-WM-18 NUDOCS 8712100093 | |
| Download: ML20236X689 (3) | |
Text
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1 NPV 2 4 1997 WM Recbrd File vim Proicct $
Docket No. -
j POR V Mr. David B. Ebenhack, Vice President for Regulatory Affairs Distribution'-
Chem-Nuclear Systems, Incorporated
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1 220 Stoneridge Drive l
Columbia, South Carolina b fc WM, C23 SS)
This letter concerns Chem-Nuclear Systems Incorporated's Topical Repor[
(CNSI-WF-C-01-NP), which is currently under review at NRC. As you know, the NRC has over the past several months had communications, both verbal and in writing (Refs. 1-5), with CNSI regarding; (1) the status of our review of this report and (2) the results of research programs (Refs. 6-8) that indicate that cement-solidified waste forms may be susceptible to surface and bulk degradation as well as atypical cement strength behavior. These concerns were discussed with you and other CNSI representatives in a meeting at NRC headquarters l
on September 15, 1987. At that meeting CNSI shared some new information with the NRC, including the fact that; (1) three of the five waste stream formulations addressed in the subject topical report are no longer being used, (2) several other waste stream cement formulations (not addressed in the topical report) 4 are being marketed by CNSI, and (3) data that had been submitted (Ref. 9) by CNSI in response to NRC questions on the topical report were not obtained on the waste stream fonnulation in question, but were related to a different waste stream.
After careful consideration of the information at hand, the NRC has decided to take the following actions regarding the review of CNSi's topical report on cement solidification and the use of CNSI cement solidification agents:
1.
We are discontinuing our review of the three waste stream formulations that are no longer in current use. We will continue the technical review of the remaining two waste streams addressed in the topical report.
2.
Because the surface and bulk degradation phenomera and atypical cement strength behavior that have been observed in laborator be associated with excessive waste loading (Refs. 6-8)y tests appear to
, we request that CNSI submit, by May 30, 1987, sufficient data to support the maximum waste loading and corresponding maximum and minimum waste / binder ratios (as required by the appropriate mixing method employed).
In the interim we suggest that the maximum waste loading for waste forms solidified using CNSI cement -solidification media be limited to 18 weight percent.
If we do not receive the requested information by May 30, 1988, we will assume that CNSI has no further interest in NRC approval of their topical report or waste solidification media, and we will discontinue our review.
3.
For all CNSI waste stream formulations that are not covered by the current topical report but which constitute repeated commercial use by more than one user, a separate topical report should be submitted within 90 days of receipt of this letter. Any formulations not addressed in the new topical report should be discontinued.
8712100093 871124 PDR WASTE WM-18 PDR
4 NOV 2 41987 Mr. David B. Ebenback 2
In addition, those waste stream formulations that have not been certified and that are not in regular use by more than one customer should be discontinued unless submitted for NRC or Agreement State review and approval.
4.
NRC is requesting that CNSI review all data and information submitted in connection with the CNSI topical report review to determine that all information currently under review by NRC is correct. CNSI has previously, inappropriately, submitted compressive strength data generated using one material to support the qualification of another material under review.
This was serious, misleading and must not be repeated, as it could be considered to be a material false statement.
5.
Finally, the spec 4 ric data and information needed to qualify CNSI cement formulations are quite detailed. We suggest that these needs and any questions you might have be discussed in a meeting in Silver Spring.
This meeting can be arranged to fit both CNSI and NRC schedules by contacting me at (301) 427-4748 or Mr. LeRoy S. Person at (301) 427-4513.
Thank you very much for your cooperation.
Sincerely, I
@!ginsi Si6ned BY Michael Tokar Technical Branch Division of Low-Level Waste Management and Decommissioning, NMSS
Enclosure:
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REFERENCES:
1.
Letter, C. H. Peterson, NRC, to James Staehr CNSI, June 5, 1987.
2.
Letter, J. D. Jeffery, CNSI to L. S. Person, NRC, May 22, 1987.
3.
Letter, J. E. Carlson, CNSI to L. S. Person, NRC, April 14, 1987.
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4.
Letter, J. P. Staehr, CNSI, to C. H. Peterson, NRC, June 30, 1987.
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5.
Meeting between Chem-Nuclear Systems Incorporated and Technical Branch, j
Office of Nuclear Materials Safety and Safeguards, NRC, September 15 1987.
6.
Piciulo, Adams and Siskind, "Ef fect of Cure Conditions on the Stability of Cement Waste Forms after Immersion in Water", BNL-WM-3174-4, September 1987.
l 7.
NUREG/CR-4181. Idaho National Engineering Laboratory Quarterly Progress Report, " Teachability of Radionuclides from Cement Solidified Waste Forms Produced at Operating Power Plants," January-March 1986.
8.
SE-Phys-87-02-04 Quarterly Progress Report for the Characterization of Low-Level Radioactive Decontamination Waste Study, October-December 1986 January-March 1987, April-January 1987 l
9.
Letter, Jim Staehr, CNSI, to L. S. Person, NRC, June 1, 1987.
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