IR 05000491/1979003
| ML19263E027 | |
| Person / Time | |
|---|---|
| Site: | Cherokee  |
| Issue date: | 03/02/1979 |
| From: | Gouge M, Herdt A, Rausch J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | |
| Shared Package | |
| ML19263E018 | List: |
| References | |
| 50-491-79-03, 50-491-79-3, 50-492-79-03, 50-492-79-3, 50-493-79-03, NUDOCS 7904240439 | |
| Download: ML19263E027 (7) | |
Text
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NUCLEAR REGULATORY COMMISSION
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s Report Nos.-
50-491/79-03, 50-492/79-03 and 50-493/79-03 Licensee: Duke Power Company Post Office Box 33189 Charlotte, North Carolina 28242 Facility Name:
Cherokee Nuclear Station
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Docket Nos..
50-491, 50-492, and 50-493 License Nos..
CPPR-167, CPPR-168 and CPPR-169 Inspection at Cherokee Nuclear Station near Gaffney, South Carolina Inspectors:
N hg'g.W [t S[2./ 77 J. K. Rausch Date ' Signed
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4 On bib 4 M. J. Gouge
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3/ tI n Date' Signed
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A. R. /L)f-fr).t i Approved by:
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__B/]/ Si gned l
>b Herdt, Section Chi 1, RCESB Date SUhMARY Inspection on February 6-8, 1979 Areas Inspected This routine, unar.aounced inspection involved 26 inspector-hours on-site in the areas of site preparation (Unit 2), QA program implementation, vault fire protection, construction procedures, site QA records and structural concrete placements and testing.
Results Of the six areas inspected, no apparent items of noncompliance or devia-tions were identified in five areas; one apparent item of noncompliance was found in one area (infraction-concrete cylinder moist curing room temperature control paragraph 5.:).
70042101/39
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DETAILS 1.
Persons Contacted Licensee Employees
- C. B. Aycock, Project Engineer
- A. R. Hollins, Senior QC Engineer
- J. W. Willis, Senior QA Engineer (Catawb; Project)
- K. W. Schmidt, QA Engineer W. Simmons, Civil QC Supervisor H. D. Mason, Civil QA R. Justice, Civil QA J. Marshall, DCU Other licensee employees contacted included construction craftsmen, technicians, and office personnel.
- Attended exit interview 2.
Exit Interview The inspection scope and findings were summarized on February 8, 1979 with those persons indi.cated in Paragraph I above.
The licensee acknowledged the noncompliaace. discussed in paragraph 5.c and stated that this item will te corrected and further evaluations made to determine the actiors needed to prevent recurrence.
3.
Iicensee Action on Previous _ Inspection Findings (0 pen) Deficiency (491/492/493/78-08-03): Vault Fire Control. The licensee's letter of December 20, 1978 advised that until a halon fire protection system can be procured and installed by March 1, 1979, hand-held fire extinguishers are available in the vault area which is continually monitored during normal working hours. During other :lan normal working hours, the fire rated vault is secured and a continuous security force will initiate fire fighting action should a fire develop. The IE inspector examined the temporary fire protection and confirmed that the protection is in effect.
The licensee advised the inspector that the balon system installation has been re-scheduled for June 30, 1979.
(Closed) Infraction (491/78-05-02): Improper Curing of Concrete Cylinders. The licensee's letter of August 1,1978 advised that concrete cylinders made in the field are being stored in areas less susceptable to direct sunlight and are being covered with moistened burlap in ventilated boxes.
In addition, QC inspectors are monitoring
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-2-the temperature requirements for compliance with the specification.
IE inspectors confirmed that methods appropriate for field conditions are being employed to maintain concrete test cylinders in a curing environment which meets specification requirements.
This item is closed.
4.
Unresolved Items Unresolved items are matters about which more information is required to determine whether they are acceptable or may involve noncompliance or deviations.
New unresolved items identified during this inspec-tion are discussed in paragraph 5.e.
5.
Independent Inspections a.
Observation of Category I Concrete Placement (Unit 1)
The Region II inspector Tbserved partial placement of seismic Category I concrete Pour 327 conducted in the area of Unit 1 Reactor Building-Shield Building wall 180-A at approximate elevation 76 feet.
Duke specification P81S-1109.00-00-0001 entitled " Concrete for Category I Structures" provides require-ments for placement of seismic Category I concrete.
Duke construction Procedure M-2 entitled " Inspection of Design Concrete" provides requirements for inspection and testing of seismic Category I concrete. Areas inspected included place-ment of concrete, consolidation of concrete, cleanliness and calibration of concrete testing apparatus, concrete pour records, and cold weather protection of the fresh concrete.
Placement activities pertaining to delivery time, free fall distance, layer thickness and consolidation conformed to specifications.
Samples for temperature, slump, air content, unit weight and compressive test cylinders met frequency and result requirements.
Concrete operations were continuously monitored by civil QC personnel.
Concrete placement and inspection were conducted in accordance with applicable procedures.
Within the above areas inspected, no deviations or items of noncompliance were identified.
.b.
Concrete Quality Control (QC) Record Inspection (Unit 1)
The inspector reviewed selected QC records for Category I concrete pour 327 conducted at wall 180A in Unit 1 Reactor Building-Shield Building.
The following records were reviewed:
Form M2-A Prepour Site Inspection
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-3-Form M-2D Record of Concrete Placed
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Form M-2Q Finishing and Curing Inspection Log
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The above records reviewed had been completed in accordance with Duke Construction Procedure M-2.
Form M-2Q provides for Quality Control sign-of f that all applicable inspection requirements have been met.
The licensee has committed to ANSI N45.2.5-1974 through Table 3.f.1-1 of the PSAR.
ANSI N45.2.5-1974, section 4.7 states in part:
" Inspections shall be performed throughout the specified curing period to verify the following:..(4) Curing temperature is maintained within specified limits during the entire curing period."
Form M-2Q does not provide a space for recording curing inspec-tion results nor does Construction Procedure M-2 provide guidance on how often concrete temperatares will be measured during periods when temperature extremes are experienced. The licensee is currently revising Construction Procedure M-2 in the area of concrete curing inspection.
Pending review of the forthcoming revision to Construction Procedure M-2, this item is identified as Inspector Follow-Up Item 491/492/493/79-03-03, Curing of Category I Concrete.
Within the above areas inspected, no deviations or items of noncompliance were identified.
c.
Concrete Testing Laboratory Inspection (Units 1, 2 and 3)
The concrete testing laboratory maintained by the Civil QC unit was inspected for general cleanliness and proper calibra-tion of measuring and test equipment. The concrete testing facility was clean and measuring and test equipment was in calibration except as discussed below.
The concrete testing laboratory contains a moist curing room for the curing of concrete compressive strength test cylinders.
The automatic temperature indicating equipment used to monitor moist room temperature was operating but out of calibration.
Since the automatic temperature monitoring equipment was out of calibration, the licensee was measuring temperatures and relative humidity manually on a daily basis. The licensee was utilizing QA form M-2L to document daily temperature and relative humidity inside the moist curing room. The licensee references ASTM C511-68 in Chart M-2B of Construction Procedure M-2 as the applicable specification for form M-2L.
ASTM C511
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-4-entitled " Moist Cabinets and Rooms Used in the Testing of Hydraulic Cements and Concretes" states in section 3:
"The atmosphere in a moist cabinet or room shall have a temperature of 23 + 1.
degrees Centigrade and a relative humidity of not less than 90 percent."
The Region II inspector identified six instances during the previous sixty-day period where daily temperature and relative humidity had not been documented in the moist curing room for intervals ranging from three to five days. The intervals with inclusive dates where measurements were not taken were as follows:
December 14-18, 1978
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December 23-26, 1978
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December 29, 1978 through January 2, 1979 January 20-22, 1979 January 26-28, 1979
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February 2-4, 1979 Failure to measure temperature and relative humidity in the moist curing room at an interval to ensure control of the curing environment is contrary to Criterion X of Appendix B to 10 CFR 50 and was identified to the licensee as infraction 491/79-03-04, Concrete Cylinder Moist Curing Room Temperature Control.
d.
Non-Conforming Item System (Units 1, 2 and 3)
Duke Power Company Quality Assurance Program Procedure Q-1, entitled " Control of Non-Conforming Items", provides procedures for identification, control, documentation and correction of non-conforming items. The Region II inspector reviewed QA Procedure Q-1 and found that the procedure provides an acceptable method for compliance with Criterion XV of Appendix B to 10 CFR 50.
The system, as implemented at Cherokee Nuclear Plant, for control of non-conforming items was examined for conformance to QA Procedure Q-1.
Non-conforming item reports 0386 through 0454 were reviewed to ascertain that on-site routing and documentation were acceptable. The scope of proposed corrective actions was reviewed for adequacy by the site QA unit and a system for reporting significant non-conforming items to licensee management had been established.
The system for control of non-conforming item 3 was found to be implemented and functioning in accordance with QA Procedure Q-.
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-5-Within the above areas inspected, no deviations or items of noncompliance were identified.
e.
Honeycomb Condition of Finished Concrete Upon form removal from the Nuclear Service Water (NSW) cable tunnels and the sump room areas, Duke personnel noted a honey-comb condition of concrete surfaces.
NCR's have been prepared identified as 0463, 0462 and 0461, reporting honeycombing in the NSW cable tunnel walls at the construction joints. Honey-combs noted were 6-1/2 inches deep by 6 inches by 14 inches; 12 inches deep by 32 inches by 10 inches and 12 inches deep by one inch by 72 inches.
The honeycomb condition in the ceiling areas of the sump rooms had not fully been determined since not all the forms had been removed exposing the surfaces.
The licensee advised that NCR's would be prepared upon determining the extent and degree of severeness of the problem. At the time of this inspection, the licensee had not been able to determine the cause of the problem. This item will remain open as unresolved pending completion of the licensee's actioi
.o analyze the conditions
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and complete corrective action.
It will be identified as unresolved item 491/492/493-79-03-02, Honeycombed Concrete.
Within the above areas inspected, no deviations or items of noncompliance were identified.
6.
Containment Systems and Liner Plate Duke Power Company Construction Company Procedure M-71, Revision 0 dated December 4, 1978 establishes the inspection requirements for the erection of the steel containment and the related structural items to ASME Section III, subsection NE.
The procedure states that the QC engineers are responsible for performing the inspections and NDE in accordance with M-71 and which states that the QA engineers are responsible for determining inspection and NDE requirements and approving and maintaining documents and records.
Procedure M-71 requires that a construction procedure shall be prepared by the senior construction engineer and the senior QA engineer to provide information required to complete weld process control documents for each class and type of application.
The inspector questioned the status of the applicable construct.ve procedures but was unable to determine that the procedures have been. tarted or prepared.
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This item is considered an inspection follow-up item (IFI) and is identified as 491/492/493-79-03-01, Construction procedure preparation.
Within the above areas inspected, no items of noncompliance or deviations were identified.
7.
Personnel Changes J. W. Willis will assume duties as the Senior QA Engineer beginning March 1, 1979.
Until that date, he is dividing his time between the Catawba and Cherokee sites.
Mr. II. D. Mason has been transferred from the QA section of the Cherokee site on February 1, 1979 to the Catawba site where he has assumed supervisory duties reporting to R. A. Morgan.
Mr. Ken Schmidt, QA Engineer, will continue as acting Senior 0A Engineer at Catawba until March 1, 1979.