ML20210K054
| ML20210K054 | |
| Person / Time | |
|---|---|
| Site: | 07000734 |
| Issue date: | 08/13/1997 |
| From: | Asmussen K GENERAL ATOMICS (FORMERLY GA TECHNOLOGIES, INC./GENER |
| To: | Gaskin C NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS) |
| Shared Package | |
| ML19317C625 | List: |
| References | |
| 696-2787, NUDOCS 9708190129 | |
| Download: ML20210K054 (7) | |
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,e August 13,1997 696 2787 VIA EXPRESS MAIL SERVICE Mr. Charles E. Gaskin Licensing Section irlicensing Branch Division of Fuel Cycle Safety and Safeguards, NMSS U.S. Nuclear Regulatory Commission Washington, DC 20555 Sub}ect:
Docket No.70-734; SNM-696: Additional Supplemental Information in Support of Release of *Non Impacted"GA Facilities and Surrounding Areas to Unrestricted Use and Deletion from License
References:
(1) Asmussen, Keith E., Letter No. 696-2717 to Mr. Charles E. Gaskin,
" Docket No.70-734; SNM-696: Request for Release of *Non-lmpacted" GA Facilities and Surrounding Areas to Unrestricted Use," dated April 30,1997 (2) Asmussen, Kolth E., Letter No. 696-2753 to Mr. Charles E. Gaskin,
" Docket No.70-734; SNM 696: Request for Rolease of "Non lmpacted" GA Facilities and Surrounding Areas to Unrestricted Use and their Deletion from License - Supplementallnformation dated July 2,1997
Dear Mr. Gaskin:
In addition to the inforraation supplied previously (Refs.1 & 2) in support of General Atomics (GA's) request for release of the "non-impacted" facilities and surrounding land on GA's Main Site and Sorrento Valley Site, GA is hereby supplying further information pursuant to the telephone conference call you and Ms. Heather Astwood had with Ms. Laura Gonzales on July 21,1997.
Specifically, the following additional items have been completed and/or revised in support of GA's request for the release of the "non-impacted" areas to unrestricted use and their deletion from GA's license:
(1)
The area where the Building 2, Laboratory 307 underground tank had been located prior to it's removal in 1984 (which GA excluded from the "non impacted area) has been enlarged. The area is 39'x75'; bounded on the west by walkway and stairs and bounded on the south by curb of road. The area extends 39' north from curb to top of stairs and 75' east from walkway to light post. Figure 1 was revised to show the enlarged excluded area and to describe the boundary.
(2)
The area where the Building 2, Laboratory 540 underground tank had been located prior to it's removal in 1984 (which GA excluded from the "non-impacted" area) has been further clarified. The area is 13'x38'; bounded on the north by curb of road and on the east by walkway / stairs. The area extends 38' west of walkway / stairs and 13' f
south from curb of road. Figure 1 was revised to describe the boundary.
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C PDR 3550 GENERAL ATOMICS COURT, SAN DIEGO. CA 921211194 P O. box 85608. SAN DIEGa CA 92186 9784 1619)455 3000
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Mr. Charles E. Gaskin, U.S. NRC August 13,1997 696-2787 -
Page 2 (3)
Soil samples were taken on the main site "non impacted" area. A total of eleven (11) soll samples (P24 through P34) were collected and analyzed by gamma spectroscopy (see Figure 1 A). The locations selected took into consideration the proximity of the area to GA's site property boundary, potential drainage from nuclear facilities, availability of soil, and accessibility. (A draft drawing showing the proposed locations were faxed to you and to Mr. Chuck Hooker on July 24,1997). The results, which are provided in Table 1, show levels are at or near normal background levels (background values were provided in Table 2). The results of the soll samples were also well l
below previously approved soil release criteria for the GA site (i.e.,30 pCl/g for enriched uranium,35 pCi/g for depleted urenium,10 pCl/g for thorium, and 15 pCl/g for ' 'Cs). Nate: After Identifying a specific boundary for the Building 2 540 excluded area it was noted that soil sample P30 had been collected within the excluded area rather than in the "non-impacted" area, therefore, another sample, identified as P30N was collected east of the walkway in the "non impacted" area. The resultis includedin Table 1 and the location is shown in the revised Figure 1A.
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(4)
Exposure rate measurements were also taken at the same locations as the soll samples (on the main site). The measured values are summarized in Table 3. No elevated levels were observed. [However, since activities currently ongoing in some of the Main Site f acilities (including Buildings 21,22,23,27,27-1,30 and 31) currently have radiation restricted areas), it would not be unusual to measure elevated radiation levels attributable to those activities; but not due to contaminants in the soil.]
(5)
Two (2) additional soll samples were taken in the "non-impacted Sorrento Valley area (soil samples P22 and P23) across from (and east of) Building 34 as shown in the revised Figure 2A and analyzed by gamma spectroscopy. The results, which are also provided in Table 3, showed levels were at or near normal background levels (as mentioned above, background values are provided in Table 2). The results of the analyses of these soil samples were well below previously approved soil release enteria for the GA site (i.e.,30 pCl/g for enriched uranium,35 pCi/g for depleted uranium,10 pCl/g for thorium, and 15pCl/g for ' 7Cs).
(6)
Radiation measurements (microR/hr measurements at one meter) were also taken on July 31,1997 with Mr. Chuck Hooker and Ms. Christina Ley in the non impacted areas.
A table showing the results of this survey and the approximate locations of the measurements is provided in Table 4.
In view of the above described additionalsupplementalinformation, GA requests that its license be amended to release to unrestricted use the "non impacted" areas as described above and as shown on the enclosed revised Figures 1 and 2 and to delete these areas from GA's radioactive materials license number SNM-696.
Since GA's state of California broad scope radioactive materiallicense (No. 0145 37) has similar language regarding the " authorized place of use," GA is (under separate cover) also requesting the state of Califomia to issue a license amendment releasing these same "non-impacted" areas to unrestricted use and deleting them from GA's license.
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4 Mr. Charles E. Gaskin, U.S. NRC August 13,1997 096-2787
- Page3 If you have any questions regarding the above, please do not hesitate to contact Ms Laura Gonzales at (619) 455 2758, or me at (619) 455 2823.
Very truly yours, f
Dr. Keith E. Asmussen Director Licensing, Safety and Nuclear Compliance
Enclosures:
Revised Figures 1 & 2, Figure 1 A and revised Figure 2A and Tables 1,2,3 and 4 cc: Mr. Frank Wenslawski, U.S. NRC, Region IV, WCFR (1 copy)
Mr. Chuck Hooker, U.S. NRC, Region IV, WCFO (1 copy)
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.Mr. Charles E. Gaskin, U.S. NRC August 13,1997 696 2787 Page 4 e
Table 1:.
Results of Gamma Spectroscopy Analyses of Soll Samples Collected on GA'sL
'"Non4mpacted Areas"" '
RadIonuclide Concentration (pCl/1) - Note: Background (LQl subtracted.
187Cs
"'Th
- Ra ('ath)
Total Thorium 30 8 U
^
'"Th + Th
,,3,77y *,',,,,
33d77y*g' set.s k.v p k
,,,gy
,g gy Sorrento Valley Site Additional Samples (P22 and P23) see Figure 2A P22 0.038 0.037 0.93
- 0.10 1.80
- 0.37 2.73 2.55
- 0.66 0.20
- 0.07 P23 ND 0.92
- 0.09 1.78
- 0.33 2.70 1.7920.55 0.12
- 0.07 Main Site Soil Samples (P24 P34) see Figure 1 A P24 ND 1.28
- 0.11 2.09
- 0.39 3.37 2.78
- 0.64 0.19
- 0.10 P25 ND 1.21
- 0.11 2.00
- 0.36 3.21 2.71
- 0.06 0.15
- 0.07 P26 ND 0.82 z 0.11 1.47 i 0.48 2.29 1.64 0.78 0.15 0.06 P27 0.14
- 0.07 1.2120.11 1.84 i 0.40 3.05 1.79
- 0.57 0.22
- 0.08 P28 ND 1.12 0.11 1.89
- 0.39 3.01 2.28
- 0.71 0.13
- 0.07 P29 0.09 0.05 0.75
- 0.11 1.30
- 0.39 2.05 1.70
- 0.64 0.10
- 0.09 P30N ND 0.82
- 0.10 1.57 z 0.36 2.39 1.86 0.65 0.14 0.07 P31 0.05
- 0.05 0.65
- 0.15 1.27 0.33 1.92 1.73
- 0.58 0.16 0.06 P32 ND 1.00
- 0.09 1.82
- 0.38 2.82 1.72
- 0.52 0.12
- 0.06 P33 ND 0.98 0.11 1.87 0.41 2.85 1.76 0.61 0.15 0.07 P34 0.09
- 0.07 0.65
- 0.10 1.28
- 0.32 1.93 1.47
- 0.51 0.10
- 0.06 ND for Cs 137 = < 0.1 pCi/g
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Mr. Charles E. Gaskin, U.S. NRC August 13,1997 696-2787 Pag 4 5 Table 2:
a c
il
$ ample Cs137 Th 228 Ra 228 Total Thorium U 238 U235 ID 8 (Th 232) w ereaM w aar AJ ND 1.28
- 0.07 1.47
- 0.14 2.75 1.98
- O 31 0.15
- 0.03 G2 0.12
- 0.03 C 92
- 0.07 1.01
- 0.12 1.93 1.86
- O 29 0.12
- 0.02 AC ND 1.29
- 0.07 1.34
- 0.14 2.63 2.27 * ').27 0.20
- 0.03 1.'4
- 0.28 2.84 2.06
- 0.48 0.19
- 0.06 BKG 1 ND 1.40
- 0.16 4
BKG 2 ND 1.54
- 0.15 1.57
- 0.27 3.11 2.30
- 0.45 0.17
- 0.05 BKG 3 ND 1.40
- 0.14 1.62
- 0.26 3 02 ND 0.19
- 0.05 BKG-4 ND 0 67
- 0.09 0.84
- 0.17 1.51 1.15
- 0.37 0.09
- 0.04 BKG5 ND 1.51
- 0.16 1.79
- 0.31 3.30 2.77
- 0.67 0.12
- 0.06 BKG6 ND 0.68
- 0.09 0.76
- 0.16 1.44 ND 0.08
- O.03 BKG 7 ND 1.17
- 0.12 1.28
- 0.22 2.45 1.83
- 0.43 0.11
- 0.04 Mean e 2 o 1.19
- 0.64 1.31
- 0.68 2.5
- 1.32 2.03
- 0.93 0.14
- 0.09 Samplos gamma scanned for 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br />.
ND=
< 0.1 pCl/g for Cs 137, < 1.0 pCi/g for U 238 a
Samples collected in June and August 1993, typically about 12 miles from the Building 37 site at the followinglocations:
AJ Cellected on a hillside rest of Building 39 & northwest of building 37, -3' from GA's fence.
G2 Collected about 1200 feet west of Bldg 1 (near Torry Pines Road), and -7/8 of a mile southwest of Building 37.
AC Collected about 1 mile southeast of the main site & about 2 miles southeast of Building 37.
BKG 1 Collected about 1 mile from Building 37 at the Scripps Hospital Entrance, east of Genesse Ave.
BKG 2 Collected about 1.2 miles from Building 37 at Sorrento Court Rd. by North entrance to Post Office.
BKG-3 Collected about 1.5 miles from Building 37 at Sorrento Vista Parkway near Lusk Blvd. South.
BKG-4 Collected about 1 mile west from Building 37, west off Genesee corner of North Torrey Pines Road and Torrey Pines Scenic Drive BKG-5 Collected about 2 miles west of GA off of La Jolla Shores Drive.
BKG-6 Collected about 2 miles northwest of Building 37 on North Torrey Pines Road BKG-7 Collected about 2 miles near V.A. Hospital on La Jolla Village Dnve (southwest) e
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Mr. Charles E. Geekin, U.S. NRC August 13,1997 096 2787 Page6 Tetdo 3: Espeewe Rate Messwomente en GA's "!:r ' ;2f* Aroes Average Location Exposure Rate (pR/hr)
P22 12 P23 12 P24 15 P25 15 P26 15 P27 13 P28 13 P29 10 P30 9
P31 9
P32 10 P33 11 P34
9 Background
15 Survey completed July 29,1997 using a Ludlum Measurements Model 19 microR meter # 87120, calibration due date September 24,1997.
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Mr. Charles E. Gaskin, U.S. NRC August 13,1997 696 2787 -
Page 7 Table 4:
Exposure Mate Measurements at Soll Sample and other Locations with M6 C, Hooker (NRC inspector)
Exposure Rate (pR/hr) location (Average or Range)
Pt 15 P2 17 18 P11 14 P16 1516 PIB 15 P19 15 16 P20 14 P22 16 P23 15 P24 16 P25 16-17 P26 14 P27 P28 P29 12-13 P30 13 P31-12 Previous 307 Tank Site 12 P32 P33 Average 13 (range 11 15)
P34 11 12 Outside the NW comer of Building 9 14 15
Background
15 Survey completed July 31,1997 using a Ludlum Measurements Model 19 microR meter #
101758, calibration due date September 29,1997 with Mr. Chuck Hocker, NRC Inspector.
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