IR 05000400/1982016

IE Insp Repts 50-400/82-16 & 50-401/82-16 on 820510-13. Noncompliance Noted:Improper Field Curing of Concrete Test Cylinders

ML20054M998
Person / Time
Site:	Harris
Issue date:	05/28/1982
From:	Conlon T, Harris J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
To:
Shared Package
ML20054M980	List: IR 05000400/1982016 ML20054M979 ML20054M993 ML20054M994 ML20054M995
References
50-400-82-16, 50-401-82-16, NUDOCS 8207150250
Download: ML20054M998 (4)

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LMfED STATES 8 *,j NtlCLEAR REGULATORY COMM(SSION d

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8 /1 REGION 11 iO!MARii.TTA ST., N.W.,8UITE 3100 g g

, ATLANTA, GEORGIA 30303

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Report Nos. 50-400/82-26 and 50-401/82-16 ,

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Licensee: Carolina pewer and Light {p. pa Fayetteville Street - .

Raleigh, NC 27602 ,

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Facility Name: Sharon Harris ,e

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Docket Nos. 50-400/82-16 and 50-401.'82-16

,t License Nos. CPpR-158 and CPPR-159 Inspector: ' '

8/2Y/P1 Date Signed J. R.f arri s

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Approvedbf . Enf W 2 / l_ f g 2 _

T. E. Conlon, ection Chief

Date igned Engineering Inspection Branch Division of Ecgineering and Tecnnical Programs SUMMARY Inspection on May 10-13, 1982 Areas Inspected This routine, unannounced i sp'ection involved 26 inspector-hours on site in the areas of structural concrete, site preparation, dams and p evious inspection findings ,

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Results Of the four areas inspected,' no violatioks 'or deviations were identified in three areas; one violation was found in one area (Improper field curing of concrete test cylinders paragraph 6).

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s 8207150250 820708 PDR ADOCK 05000400 0 PDR

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I>- REPORT DETAILS Persons Contacted Liceesee Employees

• R. M. Parsons Site Manager

• A. M. Lucas Senior Resident Engineer

'G. L. Forehand, Site OA/QC Director

• A. Pulliam, Civil QC Inspector

' V. Pridgen, Construction Engineer, Civil

<* . Simpson, Principal Construction Specialist B. D. Marlar, Discipline Engineer

• D. C. Whitehetd, QA Supervisor

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. *J. A. Brown, QA/QC Technician Other licensee employees contacted included five construction craf tsmen, two technicians and three office personne Otner Organizations

• B. B. Isam, Construction Manager, Daniel Construction Company NRC Resident Inspector

• G . F . Ma n<e i l

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• Attended exit interview

' Exit Interview

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The inspection scope and findings were summarized on May 13, 1982, with those persons irdicated in paragraph 1 abov . Licensee Action on Previous Inspection Findings Not inspecte . Unresolved Items Unresolved items were not identified during this inspectio '

1 Independent Inspection Effort

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, Soil and concrete laboratories and currentness of calibration of

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laboratory equipmen Backfill operations adjacent to the Unit 1 powerbloc . __ - _ - _

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2 Preparation for filling and modification of Unit 3 and Unit 4 contain-ment building excavations and ongoing work activities on the fuel handling buildin Partial placement of pour number 1FH1W286011 and 1FHXW310010 in the fuel handling buildin Completed work on main and west auxiliary da Work on the dams is complete and pool levels are approaching design level l No violations or deviations were identifie . Containment (Structural Concrete II) - Observation of Work and Work Acti-vities - Unit 1 i The inspector observed preparation and partial placement of pour number 1CBXW406002 in the reactor dome. Acceptance criteria examined by the inspector appear in the following document PSAR Section 5 EBASCO Specification CAR-SH-CH-6 CP&L Procedure CQC-13 COA-6, WP-5, WP-11, TP-15 and TP-22 Drawing CAR-2167, G-0660, & CAR 2167-G-0661, Containment Building Dome Reinforcing Steel Forms were tight, clean, and level. Rebar was properly installed and clea Placement activities pertaining to delivery time, free fall, flow distance, layer thickness, and consolidation conformed to specification Concrete placement activities were continuously monitored by Construction and QA inspector Examination of batch tickets indicated that the specified design mix was being delivered. Samples of pla ',ic concrete were obtained from the pumpline discharge and tested in accordance with specification requirements. Test results indicated that plastic concrete being placed met requirements for slump, air content, and temperature. Examination of Cadweld operations and records of Cadwelders indicated Cadwelding was being done in accordance with procedures by qualified operator Observation of controls on field curing of concrete test cylinders disclosed the following violation. Specification CAR-SH-CH-6 " Concrete" requires that field cured test cylinders be controlled in accordance with ASTM C-31. ASTM C-31 specifies that field cured test cylinders are to be stored under conditions that maintain the temperature adjacent to the cylinders in a range of 60 to 80 degrees Fahrenheit for 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> after molding of the cylinders. Contrary to the requirements of specification CAR-SH-CH-6, test cylinders from pour number 1CBXW406002 were observed being stored at temp-eratures greater than 80 degreees Fahrenheit during the first 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> af ter

, moldin Failure to control the curing temperature on field cured test cylinders was identified to the licensee as violation 400/82-16-0 .. _ - . - - _ . _

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3 Previously Identified Inspector Followup Item (Closed) Inspector Followup Item 400/82-12-01 and 401/82-12-01, " Evaluation of Concrete Aggregate Gradation Problems." Test data showed that the number I of failing gradation tests on concrete aggregates was increasing. The licensee identified the problem and conducted an investigation to identify the cause.of the increased number of failing aggregate tests. Examination of records and discussions with responsible engineers disclosed that test results were only slightly outside of specification limits and that strength test data on test cylinders exceeds design strengths by 15 to 40 percent.

, Procedure COC-13 requires concrete aggregates to be sampled and tested daily i

for compliance with specification ( ASIM-C-33) gradation requirements. The daily sample is taken at the end of the day's concrete production. On days when more than 200 cubic yards of concrete is placed, an additional aggre-gate sample is required to be obtained and tested after 200 cubic yards of concrete is placed. Whenever testing of an "after 200 cubic yard sample" fails, concrete production is allowed to continue until the pour in progress is completed (as per procedure CQC-13) and an NCR is written to document the out of specification gradatio After pours are completed, concrete pro-duction is stoppad until the batch plant aggregate bins are purged and the aggregate is sampled and tested until it meets the gradation requirement When the daily sample failed the gradation test, the bins were purged and aggregate was sampled and tested until satisfactory results were obtaine However, the failing daily test results were not being recorde Aggregate gradation tests are now being evaluated using a running average of the ten previous tests (as recommended by ACI 304) when the aggregate gradation is less than five percent out of specification and when the gradation is out of specification by more than five percent, a noncon-formance report is written. Procedure CQC-13 has been revised to reflect these changes. Examination of test data showed that procedure changes are being implemented and that all test data is now being recorded. This item is closed.

, No violations or deviations were identified.

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