IR 05000424/1979017
| ML19260D847 | |
| Person / Time | |
|---|---|
| Site: | Vogtle  |
| Issue date: | 12/28/1979 |
| From: | Conlon T, Harris J, Hunt M NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | |
| Shared Package | |
| ML19260D838 | List: |
| References | |
| 50-424-79-17, 50-425-79-17, NUDOCS 8002120498 | |
| Download: ML19260D847 (2) | |
Text
%,,
UNITED STATES
NUCLEAR REGULATORY COMMISSION o
$
REGION 11
,
o,
[
101 MARIETTA ST., N.W., SUITE 3100
- [
ATLANTA, GEORGIA 30303 DEC 2 81979 Report Nos. 50-424/79-17 and 50-425//9-17 Licensee: Georgia Power Company 270 Peachtree Street Atlanta, GA 30303 Facility Name: Vogtle Units 1 and 2 Docket Nos. 50-424 and 50-425 License Nos. CPPR-108 and CPPR-109 Inspection at Vogtle site near Waynesboro, Georgia Inspectors: M d.h est.
/
- f 77 J. R. Harris Dat'e Signed
'
lu l dt
/Ib Vb 6 M. D.' Hunt
'f
[
Date Signed Accompanying Personnel:
0. Thompson, NRR
/ 2.fy.g [y 9 Approved by: g W
T. E. Conlon, Section Chief, RC&ES Branch Date Signed SUMMARY Inspection on November 14-16 and 20-21, 1979 Areas Inspected This routine, unannounced inspection involved 46 inspector-hours on site in the areas of previously identified items and structural backfill.
Results Of the two areas inspected, no items of noncompliance or deviationt were identified in one area; one item of noncompliance was found in one area (Infraction - Failure to report deficiency in backfill - Paragraph 5).
.
1949 353 800eno 1/W
.
-2-
.
content of backfill by use of the field stove agrees with the moisture content determined by use of methods in ASTM D2216.
Correlation data shows that the field stove method varies by plus or minus one-half percent from the methods in ASTM D2216. The effect of the variation of field control methods from the laboratory control methods on acceptance criteria is being evaluated by the licensee. This item remains open pending NRC review of the licensee's evaluation.
4.
Unresolved Items Unresolved items were not identified during this inspection.
5.
Independent Inspection - Category I Backfill Upon arriving at the site on November 14, 1979, the QA Site Supervisor informed the NRC inspector that they were having a problem with Category I backfill. He indicated a severe storm which occurred on November 2, 1979, had aggravated ongoing moisture problems and eroded part of the backfill.
He stated Bechtel consultants had been called in to evaluate the problem.
The inspector asked if the NRC had been notified. The QA Supervisor stated be had attempted to contact NRC on Friday, November 9, 1979, but was not able to get through and that no contact had been tried on Monday, November 12, 1979, as it was a holiday.
The inspector accompanied by licenseh QA engineers and Bechtel's geotechnical engineer, Dr. Srinivasan, examined and photographed backfill conditions in the powerblock area. Observations disclosed the following:
Moderate to severe erosion and slumping had occurred on construction a.
slopes in the backfill.
b.
Backfill around the control building and Units 1 and 2 containment building had been severely eroded and disturbed by washes and gullies with partial undercutting of some mud slabs.
Seepage was visable along the southside of the Unit 2 tendon gallery c.
wall, indicating that the foundation may have been damaged by sub-surface erosion.
d.
The backfill construction slope north of the auxiliary building was saturated as a result of seepage and showed evidence of partial slumping.
Discussions with responsible licensee engineers and examination of records disclosed that seepage on the backfill slope north of the auxiliary building
,
had been ongoing since September 1979. Stop work notice SW-C-6 showed backfilling stopped on November 1, 1979, because of seepage. Dewatering attempts with a trench drain resulted in sloughing, and stop work notice SW-C-07 was issued November 9, 1979, to stop excavations for dewatering.
Examination of NCR records showed that NCR Numbers CD-600 through CD-605 and CD-610, CD-613 and CD-614 were issued between November 6 through November 13 because of erosion in backfill around and under structural mudmats.
1949 354