ML20196B617
| ML20196B617 | |
| Person / Time | |
|---|---|
| Issue date: | 01/27/1988 |
| From: | Starmer R NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS) |
| To: | Fliegel M NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS) |
| References | |
| REF-WM-68 NUDOCS 8802120026 | |
| Download: ML20196B617 (2) | |
Text
i l/VmdoY JAN 271988 MEMORANDUM FOR: Myron Fliegel, Section Leader Operations Branch Division of Low-Level Waste Management and Decomissioning, NMSS FROM:
R. John Starmer, Section Leader Technical Branch Division of Low-Level Waste Management and Decomissioning, NMSS
SUBJECT:
REVISION TO GE0 LOGIC COMMENT, GREEN RIVER REVIEW
REFERENCE:
Memo R. J. Starmer/M. Tokar to M. Fliegel dated 1/26/88; GE0 LOGY comment on Design Calculation 10-536-08-00 In the subject document, please replace the marked passage with the following:
In addition, DOE / TAC staff have stated that disposal will take place on the Cedar Mountain Fm, that the specification in error, and that the calculation sheet requires a change.
Original Si(ined Di R. John Starmer, Section Leader Technical Branch Division of Low-level Waste Management and Dec,oun[sgiog{ng, NMSS
Enclosure:
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ENCLOSURE
- 11. Geotechnical Design Parameters-Radon Barrier Constructibility and Its Perineability Yalue; Calculation No. 10-536-01-00 The two-foot thick radon barrier layer will probably be compacted in three lifts. The first lift will be placed above sandy tailings and the the third lift will be beneath the filter / gravel-bedding layer. The top and bottom zones of the radon barrier, i.e. transition zones between the tailings and radon barrier and the filter / bedding layer and radon berrier, will not have the same permeability characteristics as. in the center zone of the compacted radon barrier. This is because it is difficult to construct a two-foot thick low permeability layer between two high permeability layers and expect the low permeability layer to have the laboratory tested permeability properties for the entire thickness of the layer, particularly when it is only two feet thick and placed in three lifts. Justification to show that the radon barrier as constructed will have uniform permeability characteristics, assumed in the design, for its entire thickness should be provided.
GEOLOGf Design Calculation 10-536-08-00 DOE's response to staff's comments regarding rock units forming the disposal foundation is unclear and inconsistent. A statement in the subject calculation that disposal would not take place on the Cedar Mountain Formation has remained unchanged contrary to data presented to the staff at the on-board review 1
meeting held in Silver Spring, MD (September 15,1987).
In addition, R. Rager, TAC, acknowledged by telephone (October 23,1987) that the specification is.
unrealistic and would be revised.
DOE's response (November 12,1987) states "excavation into the Cedar Mountain Fonnation for the tailings embankment would be permissible" and concludes the calculation sheet would be revised to that effect. No revision has been made in the final design document.
In addition, design and remedial action documents have not provided adequate evidence that disposal on the Cedar Mountain is indeed pennissible with respect to EPA standards.
Please refer to staff cossents related to characteristics of the site's bedrock and protection of ground-water resources.
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