IR 05000491/1979020
| ML19312D604 | |
| Person / Time | |
|---|---|
| Site: | Cherokee  |
| Issue date: | 12/26/1979 |
| From: | Conlon T, Lenahan J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | |
| Shared Package | |
| ML19312D585 | List: |
| References | |
| 50-491-79-20, 50-492-79-20, 50-493-79-20, NUDOCS 8003250074 | |
| Download: ML19312D604 (5) | |
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'o UNITED 8TATES
NUCLEAR REGULATORY COMMISSION o
Gd E
REGION 11
o 101 MARIETTA ST., N.W., SUITE 3100 o
ATLANTA, GEORGIA 30303
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DEC 2 71979 Report Nos. 50-491/79-20, 50-492/79-20, and 50-493/79-20 Licensee: Duke Power Company 422 South Church Street Charlotte, North Carolina 28242 Facility Name: Cherokee, Units 1, 2, and 3 Docket Nos. 50-491, 50-492, and 50-493 License Nos. CPPR-167, CPPR-168, and CPPR-169 Inspection at Cherokee site near Gaffney, South Carolina Inspector:
b O 6-E*' '3 ' W J.J.Lenafag
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Date Signed
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Approved by:C b h o,p
/J-Jg-77 T. E. Conlon, Section Chief, RC&ES Branch Date Signed i
SUMMARY l
Inspection on December 5-7, 1979 Areas Inspected
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This routine, unannounced inspection involved 19 inspector-hours onsite in the areas of construction status, structural concrete QA/QC controls and quality J
records, settlement survey quality records, and licensee action on previous inspection findings.
Results Of the four areas inspected, no apparent items of noncompliance or deviations were identified in three areas; one apparent item of noncompliance was found in i
(Deficiency - Sampling and testing of concrete aggregate paragraph 7).
one area
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DETAILS
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1.
Persons Contacted l
Licensee Employees
- C. B. Aycock, Project Engineer j
J. W. Willis, Senior QA Engineer
- B. R. Justic.
QA Engineer
- W. H. Linse3, Geotechnical Engineer
- A. R.-Hollins, Senior.QC Engineer
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W. Waggoner, Civil QC Inspector
- J. W. Davis, Senior Construction Engineer j
J. L. Moore, Civil Construction Engineer R. E. Jennings, Concrete Specialist
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- K. W. Schmidt, QA' Engineer
- L.
C. Arnold, Civil Engineer j
- Attended exit interview 2.
Exit Interview The inspection scope and findings were summarized on December 7, 1979, with those persons indicated in Paragraph 1-above. The licensee acknowledged-the noncompliance discussed in paragraph 7.
3.
Licensee Action on Previous Inspection Findings (Open) Unresolved Item 491/79-05-01, 492/79-05-01, and 493/79-05-01.
a.
Use of curing compound on surfaces to which concrete is to be bonded.
Discussions with licensee representatives disclosed that use of curing
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compound on construction joints has been discontinued..The inspector reviewed procedure number CKB-62, " Curing of of Design Concrete," Rev.
O, dated October 15, 1979,.which specifies that curing compound is not j
to be used on construction joints. This item remains open pending further evaluation by NRC of the acceptability of the past use of curing compound on construction joints.
b.
(0 pen) Noncompliance 491/79-10-01,'492/79-10-01, 493/79-10-01:
Place-
. ment of NSW dam filter materials at densities less than specified.
The licensee divided the drain and filter zone which had been compacted to less than 80 percent relative density into three' general areas with
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(1) ' Area 1. (chimney drain) - The inspector observed replacement and
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compaction of transition and. fine: filter material.in the chimney drain between stations 16+00 and 18+50.
The inspector.also observed replacement and compaction of General Group 1 materials
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-2-which had been excavated adjacent to the chimney drain between stations 16+00 and 17+50.
Fill operations were continuously monitored by QC inspectors.
(2) Area 2 (covered blanket drain) - The inspector reviewed Noncon-forming item. report (NCI) number 842. The disposition of this NCI specifies removal of the Group I soil covering portions of the blanket drain which do not meet conpaction requirements, recompaction of the areas in question, and retesting to confirm compliance with design and specification. requirements. Remedial work in Area 2 will not start until next construction season.
(3) Area 3 (exposed blanket drain) - Prior to covering the blanket drain in area 3 with Group I soils, testing will be performed to confirm materials in this portion of the blanket drain are com-pacted to specification requirements.
This item rema'ns open pending completion of the licensee's
corrective actions.
4.
Unresolved Item Unresolved items were not identified during this inspection.
5.
-Independent Inspection Effort The inspector examined the following areas:
a.
Construction status b.
Concrete batch plant c.
Soils and concrete laboratory and currentness of calibration of laboratory equipment.
d.
Duke Power Report dated July 12, 1979, "Melment Evaulation and Testing".
This report discusses the results of tests performed on concrete using a super plasticizer admixture and the effect of use of the super plasticizer on slump, durability (freeze - thaw), segregatian, bleeding, strength, uniformity of mixing, and performance. The report concludes that use of this admixture has no adverse effect on plastic and hardened concrete' properties.
Partial placement of pour number 1000, a foundation mat Turbine Building e.
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Number 1.
Concrete placed in this pour was-batched using a super
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plasticizer admixture. The mix had a 6 to 8 inch slump. No segregation
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lof the mix or bleeding of six water was observed by the inspector.
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Procedure number CKB-15, " Settlement Monitoring Procedure for Nuclear Safety Related Structure".
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Results of settlement surveys performed on the NSW pump structure and
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the NSW intake structure.
No deviations or items of noncompliance were identified.
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6.
Containment (Structural Concrete) - Review of Quality Assurance Implementing Procedures - Units 1, 2, and 3
The inspector performed a follow-up inspection of QA-QC controls for contain-ment structural concrete. The following procedure were examined to determine if work activities and quality control and quality assurance functions were provided for as ' stipulated in NRC requirements and PSAR Section 3.8.1.6:
Specification number P81S-1109.00-00-0001, " Specification for Concrete a.
for Category I Structures"
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b.
Procedure number M-2, " Inspection of Design Concrete" Procedure number 0-1, " Control of Measuring and Test Equipment.
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d.
Procedure number CKK-11, " Calibration of Concrete Plant Scales" Procedure number CKK-12, " Calibration of Concrete Plant Water Meter" e.
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Procedure number CKK-13, " Verification of Cencrete Admixture Dispensers" g.
Procedure number CBK-62, " Curing of Design Concrete"
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No deviations or items of noncompliance were identified.
7.
Containment (Structural Concrete II) - Review of Quality Records -' Unit 1 The inspector examined quality records for structural concrete. Acceptance criteria examined by the inspector are listed in paragraph 6.
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examined included:
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-Results of mixer uniformity tests performed on the central batch plant
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in'Aprilf1978,' October 1978, March 1979, and September 1979.
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Results of mixer uniformity tests performed on truck mixers, numbers
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36, 38, 39, 40, and 43, to date in' year 1979.
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CentralbatchplantscalecalibrationrecordsofFebruary9,k979, c.
April 18, 1979, July 14, 1979, l
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and October 6, 1979.
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Records of verification of visual examination of admixture dispensers performed to date in 1979.
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- W-4-Results of reactivity and ' potential reactivity tests performed on e.
concrete aggregate sampled on February 14, 1979.
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Results.of L.~ A. Ab'rasion test performed on coarse aggregate from April, ~1979 to date.
Review of the above records and discussions with responsible engineers disclosed the following noncompliance: Cherokee specification P81S-1109.00-00-0001 requires that concrete aggregate be sampled and tested for soundness and potential reactivity at 6 month intervals. However, after_the concrete aggregates were' sampled for soundness-and potential reactivity testing on February 14, 1979, no additional samples were obtained for these tests until November 28, 1979. The test was identified to the licensee as
' Deficiency 491/79-01, 492/79-01 and 493/79-01, " Sampling and testing of concrete aggregate". NCI number 1119 was written by the licensee to document and resolve this item.
No deviations were identified.
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