ML20057F026
| ML20057F026 | |
| Person / Time | |
|---|---|
| Site: | 07000734 |
| Issue date: | 10/06/1993 |
| From: | Emeigh C NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS) |
| To: | Asmussen K GENERAL ATOMICS (FORMERLY GA TECHNOLOGIES, INC./GENER |
| References | |
| TAC-L30607, NUDOCS 9310140029 | |
| Download: ML20057F026 (2) | |
Text
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OCT 6 1993 Docket 70-734
' License SNM-696 Dr. Keith Asmussen, Director Licensing, Safety, and Nuclear Compliance General Atomics P. O. Box 85608 San Diego, California 92186-9784
Dear Dr. Asmussen:
SUBJECT:
REQUEST FOR ADDITIONAL INFORMATION ON S0ll SAMPLING PLAN (TAC NO.
L30607)
This refers to your application dated August 23, 1993, requesting an amendment to Materials License SNM-696.
Our review of your " Soil Sampling Plan for Phase II of the SVA Decommissioning Project," dated August 20, 1993 has identified additional information that is needed before final action can be taken on your request.
In general, the plan is acceptable in that it follows the guidance in draft NUREG/CR-5849; however some clarification is requested.
Please respond to the enclosed comments within 45 days of the date of this letter and reference the above Tac No. in future correspondence related to this request.
If you have questions regarding this matter, please contact Mr. Robert Wilson
~
of my staff at (301) 504-2126 or me at (301) 504-2396.
Wsmal Signed Br Charles W. Emeigh, Section Leader Licensing Section I Licensing Branch Division of Fuel Cycle Safety and Safeguards, NMSS
Enclosure:
As stated DISTRIBUTION: (Control No. 340S)
Docket 70-734 PDR NRC File Center Region V NMSS r/f FCSS r/f FCLB r/f FCLS1 r/f EKeegan EienEyck CHooker, RV e
[REWilson A:\\SOILSAMP]
- SEE PREVIOUS CONCURRENCE OFC FCLB
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OFFICIAL RECORD COPY I
12-124 g
9310140029 931006
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Request for Additional Information Application dated August 23, 1993 i
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General Atomics Docket 70-734 Comments on " Soil Sampling Plan for Phase II of the SVA Decommissioning Project" GENERAL i
The final survey should not commence until remediation is completed. After the final survey has begun all results should be reported, including both pre-and post-i remediation, if additional remediation is deemed necessary based on the results of the final survey. Also, all elevated areas identified during the final survey should be evaluated for acceptability using NUREG/CR-5849 averaging methods, regardless of t
whether or not remediation will be conducted.
SPECIFIC COMMENTS 1.
Page 1, paragraph 4 - The thorium limit of 10 pCi/g is for total thorium. There are no individual limits for Th-232 and Th-228. This i
should be clarified in the discussion of applicable limits.
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i 2.
Page 2, paragraph 2 - NUREG/CR-5849 recommends two criteria forThe first is the?
determining acceptability of elevated' areas.
criterion described in the licensee's plan. The second criterion is l
5 area should be less than the thattheweightedaverageovepa100maveraging criteria is not in the plan and average guideline. The 100 m i
should be added.
V Page 2, paragraph 6 - What method was used to determine background l
3.
concentrations with a 95% confidence?
l 4.
Page 2, paragraph 1 - Why is the Th-232 concentration determined by averaging Th-228 and Ra-228? The Ac-228 concentration alone should be more representative of the Th-232 concentrations.
5.
Page 3, paragraph 3 - How were the MDA's calculated?
I l
6.
Page 4, paragraph 4 - An affected area is any area known to be-l contaminated, or one that is potentially contaminated, based on process knowledge and previous surveys.
It is incorrect to define affected i
areas as those areas with contamination in excess of the release criteria. The classification of the areas to be surveyed should be l
reassessed using the correct definition of affected area.
i 6.
Page 6, paragraph 1 - What is the justification for not performing subsurfape sampling if the area of surface soil contamination is less i
than 5 m ?
i 7.
Page 7, paragraph 2 - Will the soil sample results be tested for acceptability at the 95% confidence level in accordance with draft l
NUREG/CR-5849, Equation 8-137 Enclosure B
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