ML20002D459
| ML20002D459 | |
| Person / Time | |
|---|---|
| Site: | River Bend  |
| Issue date: | 12/05/1980 |
| From: | Crossman W, Randy Hall, Tapia J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| To: | |
| Shared Package | |
| ML20002D444 | List: |
| References | |
| 50-458-80-12, NUDOCS 8101210075 | |
| Download: ML20002D459 (3) | |
See also: IR 05000458/1980012
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U. S. NUCLEAR REGULATORY COMMISSION
OFFICE OF INSPECTION AND ENFORCEMENT
REGION IV
Report No. 50-458/80-12
Docket No. 50-458
Category A2
Licensee:
Gulf States Utilities
Post Office Box 2951
Beaumont, Texas 77704
Facility Name:
River Bend, Unit No. 1
Inspection at:
River Bend Site
Inspection Conducted:
November 18-21, 1980
. Inspector:
y d-
JA[5[80
-J. I. Tapia Rea'ctorIn}4ector,EngineeringSupport
Dat'e
Section
Other Accompanying:
Personnel:
W. B. Jones, Engineering Aide (Co-op)
/2/[/dPD
Approved:
Ov -
W. A. Crossman, Chief, Projects Section
Date
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R. E.~ Hall, Chief, Engineering Support Section
patt
Inspection Summary:
Inspection on November 18-21, 1980 (Report No. 50-458/80-12)
Areas Inspected:
Routine, unannounced inspection of concrete and backfill
placement activities.
The inspection involved twenty-eight hours by one NRC
Inspector.
Results:
In the areas inspected, two Violations were found in the area of
concrete placement (Violation - insufficient lighting of concrete placement -
paragraph 3; and Violation - water / cement ratio exceeded the maximum allowable -
paragraph 3).
8102s2007S
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DETAILS
1.
Persons Contacted
Principal Licensee Employees
- T. C. Crouse, Director of Quality Assurance
J. R. Dungelberg, Assistant Superintendent of Site Construction
P. D. Graham, QA Engineer
J. E. Wimberly, Superintendent of Site Construction
Other Personnel (Stone and Webster)
D. Castleberry, Senior QC Engineer - Structural Steel Welding
- A. Kamdor, Resident Engineer
S. King, QC Inspection Supervisor - Soils
H. Patton, Senior QC Inspector - Cadwelds
S. Salowitz, Senior QC Inspector - Civil
D. Wells, Chief QC Inspection Supervisor
The IE Inspector also talked with other licensee employees and contractor
personnel including members of the QA/QC and engineering staffs.
- Denotes those attending the exit interview.
2.
Backfill Placement
Placement of Category I backfill in the areas north and east of the
Diesel Generator Building was observed during this inspection. Work
activities were found to conform with the requirements of S&W Construction
Methods Procedure No. 2.2, Revision 0, " Earthwork," and Quality Assurance
Directive No. 10.4, Revision A, " Earthwork Inspections." Maximum loose
lift thickness and minimum compactor passes were specifically addressed.
Stone & Webster Specification No. 210.100, Revision 1, " Site Development
Work," delineates the requirements and acceptance criteria contained in
the implementing procedures for both bt.ckfill placement and testing.
The
IE Inspector reviewed the results of five relative density tests per-
formed during the period November 12-19, 1980.
The tests were performed
in accordance with ANSI / ASTM D 2049-69, " Standard Test Method for Relative
Density of Cohesionless Soils." Five test results from the same period
performed in accordance with ANSI / ASTM D 422-63 (1972), " Standard Method
for Particle - Size Analysis of Soils," were also reviewed.
The Calibra-
tion Checklist for the Vibratory Table used in the relative density tests
wcs also reviewed.
All records reviewed were found to indicate con-
formance with the design specification requirements.
No violations or deviations were identified.
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3.
Concrete Placement
The IE inspector observed portions of concrete placement No. SC4-W-85-7;
a 3'-6" extegior radigs wall in the No. 1 Standby Cooling Tower, between
azimuths 150 and 180 and extending from elevation 64'-6" to 84'-6".
During the inspection, it was observed that the bottom of the form was
dark, such that the consolidation of the concrete could not be adequately
determined from the top of the form where the S&W QC Inspector was observed
to be performing his inspection.
The S&W QC Inspector did not have a
flashlight for observing the consolidation.
S&W Specification No. 210.370,
Revision 5, " Placing Concrete and Reinforcing Steel," requires that lighting
that can improve the placemer.t of concrete be used wherever practicable.
This requirement was applicable to the placement in question since it was
a twenty foot deep wall which resulted in poor visibility on the date of
placement.
In addition, the failure of the QC Inspector to carry a
flashlight indicates that the consolidation and therefore placement of the
concrete was not improved but rather left to judgements conducted in poor
visibility.
This constitutes a Violation, in that the specification
procedure was not followed.
In process testing results at the field QC station were also reviewed
during placement No. SC4-W-85-7.
A review of the batch tickets disclosed
that ticket No.14335 indicated that 10 additior.al gallons of water were
allowed for jogging at the pumping station.
The ticket indicated that 12
gallons were actually added.
The actual water to cement ratio, computed
from the information on the batch ticket, was 0.397.
The maximum allowable
water to cement ration for this mix H3 is 0.394, in accordance with
S&W Specification No. 210.350, " Specification for Mixing and Delivering
Concrete." S&W Quality Assurance Directive No. 10.2, Revision B,
" Inspection of Batch Plant, Concrete, Reinforcing Steel, and Grout," requires
that water additions be checked to assure the maximum amount allowed by
Specification No. 210.350 is not exceeded.
The fact that the maximum
amount of water allowed was exceeded, and that the concrete was subse-
quently placed, represent a failure to follow quality control procedures.
This is a V1olation.
4.
Exit Interview
The IE Inspector met with the licensee and contractor representatives
denoted in paragraph 1 at the conclusion of the inspection on November 21,
1980.
The scope and findings of the inspection were summarized.
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