ML19340C966
| ML19340C966 | |
| Person / Time | |
|---|---|
| Site: | 02700039 |
| Issue date: | 11/28/1980 |
| From: | Shaffner J, Siefken D NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS) |
| To: | Hawkins E NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS) |
| References | |
| NUDOCS 8012180393 | |
| Download: ML19340C966 (6) | |
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o et f:2 MEMORANDUM T0:
Edward F. Hawkins, Section Chief
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FROM:
James A. Shaffner a
Low-Level Waste Licensing Branch David L. Siefken Low-Level Waste Licensing Branch
SUBJECT:
TRIP REPORT FOR SHEFFIELD VISIT ON OCTOBER 14-15, 1980 j
Attached please find one copy of the subject trip report.
The trip report consists of a general discussion of our observation and comments on surface conditions in specified areas of the site.
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David L. Siefken Low-Level Waste Licensing Branch Af'Jf :,V f4
-James A. Shaffner Low-Level Waste Licensing Branch
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Subject:
Trip Report for Sheffield LLW Disposal Site Visit, Sheffield, IL Date: October 14, 15, 1980 NRC
Participants:
David Siefken, James Shaffner Persons Contacted:
Russell Monre, Site Manager, NECO Andrew Armbrister, NEC0 Bruce Myer, IDPH
- j
Purpose:
General observation of surface conditions at Sheffield; ascertain level of compliance with NRC request to make improvements to site surface conditions.
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Discussion:
We arrived at the LLW disposal facility at neon on Tuesday, October 14 and discussed the purpose of our trip with Russell-Moore and Andrew Armbrister of Nuclear Engineering Company, Inc (NEr0). They were very cooperative and gave us a brief tour of the site. We then inspected the surface conditions on our own. General observations made during the remainder of the afternoon and Wednesday morning include:
1.
NECO is in the process of taking corrective actions to improve the condition of the soil cover and surface drainage of the site. Activities included l
i adding topsoil and seed (such as along trenches 23, 24 and 25), filling gullies (such as no-th of trcnch 23, south of trenches 11 and 14, and north of trench 14A), and adding a drainage ditch and culvert running north-south at the west end of trenches 1, 2, 4, 80, and 25.
2.
While there was evidence that topsoil and seeding had been added to bare spots, it is unlikely that the seed will establish itself this growing season due to the dryness and frost. NEC0 did indicate that they were considering watering to stimulate growth this fall.
3.
Several areas of erosion and gullying cited in the HLA report were still in evidence with no apparent attempt at remedial work. These include gulleys at the west ends of trenches 1 and 4, gulleys on the slope north of trench 14A.,
and gulleys near the ends of trenches 5, 9, and 10.'v M
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Not contacted at Sheffield si,te; met separately for discussion 4
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fiEC0 had recently constructed two drainageways on site; one draining northward i
past trench 24 and one draining southward west of the USGS tunnel.
These will need soil ccver or stabilization in order to prevent further erosion this fall and next spring. f4ECO indicated they would provide either mulch with seed sown in or use a soil-stabilizing spray in these areas.
5.
Several monuments were in poor condition, particularly those showing evidence of being damaged or moved during site repairs, and should be repaired or relocated. They include the east marker for trench 7, the north marker of trench 8B, the west marker for trench 11, the east marker of trench 14A, the west marker of trench 20, and the west marker for trench 24.
In addition, several markers have settled flush to or below ground level and should be reset.
6.
A significant portion of the adjacent chemical site has been recontoured.
The surface area of the chemical site draining onto the low-level waste site has not changed significantly; however, the elevation, surface roughness, and general slope have changed appreciably. Drainage is now down a steep slope to two culverts, one north and one south of trench 18.
In addition to' these general observations, specific areas which were observed are shown on the accompanying map (Enclosure 1) and described in the attached r.otes (Enclosure 2). We discussed the most significant of these areas with Russell Moore.
These included the repairs being made in the areas of gullying and cracking north of trench 14A, the condition of several trench markers, and the seeding, mulching or other adequate stabilization techniques on some of these steep slopes and in recently established drainage ways. Mr. Moore said he was aware of these areas and he seemed appreciative of our suggestions.
On the way back to the airport on Wednesday, October 15, we met with Bruce Myer, IDPH. We discussed his agency's role in post-closure. He indicated the IDPH has just been reorganized and he will mail an organizational chart to f4RC.
He indicated that IDPH is willing to take custodial responsibilities after fiECO leaves, providing the responsibilities, costs and anticipated problems are clearly defined. According to Mr. Myer, the IDPH appears to be interested in a timely resolution of the ASLB hearing and is willing to accept their subsequent responsibilities.
==
Conclusions:==
The trip did not lend itself to commitments, agreements or conclusions.
I&E Region III was contacted subsequent to the, trip to follow-u on observations made.
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D.L. Siefken Low Level W sing Branch cdames A fner j
Low-Level Westf Licensing Branch
Enclosure:
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- 14. The trench marker at the west end of T-1 has settled to 3 inches above ground surface.
- 15. Three deep gullics have developed in the vicinity of the trench marker at the west end of T-4.
Also, the trench marker is currently flush with the ground.
Two of four bolts on the marker have been sheared off.
16.
The side slope for the drainage ditch in vicinity of T-8B is cut very close to trench itself.
At this point, the side slope has 8-10 feet of fall within 15-20 feet.
The cut slope may be very susceptible to erosion.
- 17. The trench marker at the north end of T-8B is askew.
- 18. The trench marker at the west end of T-24 appears to have been dislocated.
19.
Steel loops are protruding from the ground in the middle of the trench cap on T-8.
20.
The trench marker at the west end of T-20 is damaged, covered with soil, and flush with ground.
21.
The trench marker at the west end of T-18 is settling.
22.
There is extensive rilling on the north face of T-14A. Three gulleys ('
I feet deep) have also formed. Also, a longitudinal crack has developed c.
g most of the west end of th2 slope at the top. Work was just beginning t.
mver the crack and fill the gulleys with a new lift of fill.
However, due to i crosiveness of the loess, these remedial actions may not be successful since there is no evidence that there was adequate preparation of the subgrade for the fill.
23.
The west trench marker for T-7 appears to have moved.
- 24. The north trench marker for T-10 is flush with ground. Also there is evidence of gulleying due to surface drainage around the north end of T-10.
- 25. Two culverts drain significant portions of the chemical site across the
. low-level waste site near T-18' Steep slopes inmediately upstream of the culverts may result in significant crosion from the chemical site and subsequent deposition of sediment along the north end of the low-level waste site.
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l Notes on Specific Site Observations 1.
To the north of T-23, several ravines leading into the woods have been filled.
2.
Between T-23 and T-24, there are several areas of fill and seeding.
3.
Between T-24 and T-25, the ground has been scarified, filled and seeded.
4.
The east trench marker for T-25C is partially buried.
5.
Between T-25 and T-26, the ground has been scarified, filled and seeded for the entire length.
6.
The east trench marker for T-3 is nearly illegible due to weathering.
l 7.
There are several gullies on south slope near the east end of T-ll.
In addition, there is considerable rutting at the east end of T-11 that appears to be due to sliding or spinning of the mower wheels.
8.
There has been gullying on the slope south of T-ll due to rerouting of run-off to avoid the USGS tunnel.
NECO is currently working on drainage improve-ments near T-14, T-3 and Y-11.
i 9.
The trench marker at west end of T-11 has been disturbed (eroded under and filledaround).
- 10. A deep gully on the slope down to the stream course at west end of T-11 has i
been filled.
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11.
Earth has been dumped but not graded into a low area between T-2 and T-3.
There are 4-inch deep ruts in the fill which appears to hold water.
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- 12. Work road cuts across T-2 approximately 50 feet east of the west end of
- he tren:h.
i 13.
me new drainage way running north along west ends of T-4,1, 2, 8, 23, 24, 25 may have been improperly. installed. The culvert which outlets the new drainage way is 24-inch corrogated metal.
It drops about 40 feet in 150 feet with no energy dissipator at the outlet.
Erosion protection has not been provided in the inlet area. Tne entire slope in vicinity of the outlet has been reworked and reseeded.
Slope dressing has not been provided far enough eastward to include. gulleys on the north face of T-24.
The channel side slopes have not been re-vegetated.
Gulleys und rills are developing apparently due to the lack of vegetation and the steepness of the channel side slopes.
Continued erosion may cause several trench markers (T-2, T-14A) to slip into the drainage way.
The channel bottom does not appear to be. lined with material that will prevent erosion. NECO indicated the i
side slopes would be protected, riprap would be placed to protect the outlet of the culvert, and the damaged trench marker for T-14A would be replaced.
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