IR 05000261/1986027
| ML14175B439 | |
| Person / Time | |
|---|---|
| Site: | Robinson  |
| Issue date: | 10/23/1986 |
| From: | Conlon T, Harris J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | |
| Shared Package | |
| ML14175B438 | List: |
| References | |
| 50-261-86-27, NUDOCS 8611040280 | |
| Download: ML14175B439 (5) | |
Text
ft REGo 1UNITED STATES o
NUCLEAR REGULATORY COMMISSION
REGION II
101 MARIETTA STREET, ATLANTA, GEORGIA 30323 Report No.:
50-261/86-27 Licensee:
Carolina Power and Light Company P. 0. Box 1551 Raleigh, NC 27602 Docket No.:
50-261 License No.:
DPR-23 Facility Name: H. B. Robinson Inspection Conducted: September 29 - October 3, 1986 Inspector:
/0 -
2 -S#
J. R. Harris Date Signed Approvedb_______________
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T. E. Conlon, Section Chief Date Signed Engineering Branch Division of Reactor Safety SUMMARY Scope:
This special, announced inspection was conducted in the areas of Quality Assurance/Quality Control (QA/QC)
controls and work activities for placement of the independent spent fuel storage concrete walls, and the concrete repair program for the containment building dom Results:
No violations or deviations were identifie PDR AD0OCV 4)50o0261 a
REPORT DETAILS 1. Persons Contacted Licensee Employees
- J. Curley, Director, Regulatory Compliance R. Dufresne, Project Site Engineer
- Epperly, Project Engineer, Construction
- R. Johnsons, Manager, Project Construction D. Koss, Civil Engineer, Nuclear Engineering Department
- R. Morgan, General Manager B. Rippy, QA/QC Inspector J. Russ, QA/QC Supervisor
- A. Sheppard, Technician, Regulatory Compliance B. Sullivan, Construction Coordinator L. Waring, Project Engineer, Construction
- H. Young, Director, Quality Assurance/Quality Control Other licensee employees contacted included construction craftsmen, engineers, and technician NRC Resident Inspectors
- H. Krug, Senior Resident Inspector
- R. Latta, Resident Inspector
- Attended exit interview 2. Exit Interview The inspection scope and findings were summarized on October 3, 1986, with those persons indicated in paragraph 1 abov The inspector described the areas inspected and discussed in detail the inspection finding No dissenting comments were received from the license Two new items were identified during this inspectio Inspector Followup Item 261/86-27-01, Review of records documenting quantity of concrete materials being batched at batch plant, paragraph Inspector Followup Item 261/86-27-02, Strength Tests for Materials Being Used for Structural Repairs on Containment Building Dome, paragraph The licensee did not identify as proprietary any of the materials provided to or reviewed by the inspector during this inspectio. Licensee Action on Previous Enforcement Matters This subject was not addressed in the inspectio. Unresolved Items Unresolved items were not identified during this inspectio. Independent Inspector Effort (92706)
The inspector examined repairs to the containment building dome surface coat concret The surface coat concrete is a two-inch thick topping of non-reinforced concrete which was hand troweled/float finished on the permanent stay in-place expanded metal mesh which was the exterior forms for the containment dome. The expanded metal mesh and the surface coat are not part of the containment building structural concret Application of the surface coat was for aesthetic purposes only. The dome was placed between December 1969 and March 197 Since that time, shrinkage cracks have developed in the surface coat which resulted in moisture coming in contact with the mesh which caused corrosion of the mesh and spalling and deterio ration of the surface coa In order to repair the cosmetic concrete surface coat, the licensee repaired Work Package W-020, Containment Dome Concrete Removal/Repair. Since deterioration of the surface coat did not affect the structural integrity of containment building, the repair work is considered to be non-safety-related. However, after removal of portions of the surface coat, the licensee discovered some small voids in the structural concrete under the expanded metal mesh. This repair work is safety-related since it affects a Category I structure and this will be inspected by licensee QA/QC personne Review of procedure SP-720 Rev. 1, Civil Dome Repair Structural Concrete Repair/Replacement, indicated that the procedure did not appear to address any strength tests for the material to be used in structural repair This was identified to the licensee as Inspector Followup Item (IFI) 50-261/86-27-02, Strength Tests for Materials Being Used for Structural Repairs on the Containment Building Dome. No materials have been used to date for structural repair Within the areas examined, no violations or deviations were identifie. Independent Spent Fuel Storage Installation (TI 0110/4)
The inspector examined QA/QC controls and work activities for placement of concrete pour number 885-4 for the horizontal storage module (HSM).
The HSM is a reinforced concrete structure for dry storage of spent nuclear fue The nuclear fuel assemblies will be placed in stainless steel dry shielded canisters (DSC) which will be stored in the HSM. These facilities are being constructed to provide additional interim storage capacity for the spent nuclear fue The HSM is committed to the requirements specified in 10 CFR 72n Licensing Requirements for Storage of Spent Fuel in An Independent Spent
Fuel Storage Installatio Subpart G, Quality Assurance of 10 CFR 72, requires a quality assurance program based on the criteria in Appendix B of 10 CFR 5 Areas examined during this inspection to verify that these requirements were being met were as follows:
a. Review of Quality Assurance Implementing Controls Quality assurance implementing controls examined by the inspector included the following specifications, procedures, and drawings:
(1) Specification L2-C-021, Fabrication Specification for the Horizontal Storage Module (2) Plant Modification M-885, Independent Spent Fuel Storage Instal lation Implementing Procedure (3) Drawing Number RNT 162-C-1101, Horizontal Storage Modules, General Layout and Detail (4) Drawing Number RNT 162-C-1103, Horizontal Storage Modules, Roof Plan and Wall Sections (5) Drawing Number RNT 162-C-1104, Horizontal Storage Modules, Embedment Sections and Details b. Observation of Concrete Placement Operations The inspector observed preplacement preparation and placement opera tions for wall pour number M 885-4. Preplacement observations included verifying that forms were tight, level, and had the proper dimensions; that the size, number and spacing of reinforcement steel, embeds and steel supports complied with drawing requirements; and that the placement had been properly cleane Observation of placement activities showed that the placement was continuously monitored by Construction engineers and QC inspectors and that activities pertaining to delivery time, free fall, flow distance, layer thickness, and consolidation conformed to specification requirement Samples of plastic concrete were obtained from designated sampling points and were tested in accordance with procedure requirement Test results indicated that plastic concrete being placed met the specification requirements for slump, air content, unit weight and temperatur Observation of the making of test cylinders used to verify the strength of the concrete being batched showed they were being made and field cured in accordance with specification requirement c. Review of Records Documenting Materials Certification, Test Data and Inspections Review of records included certification records for cement, aggregates and reinforcing steel; test data for slump, air, plastic concrete weight, and concrete strength; quantities of cement, aggregates and
water being included in concrete mixes being batched at the batch plant; QA/QC inspection records and nonconformance reports. Review of certification records and test data showed that materials met specifi cation requirements and that the concrete being placed met design requirement Review of QA/QC records showed that inspections were being performed and documented in accordance with requirements and that deficiencies were being identified and reporte Review of records documenting the quantities of materials (cement, aggregate, and water)
included in the mixes being batched at the plant disclosed several flaws in the record keeping in this are This review showed two examples where the amount of fine aggregate was not documented, four examples where the documented allowable amount of cement was incorrect, and one example where the correction factor for the amount of water in the fine aggregate was incorrec Discussions of these flaws with responsible engineers indicated that CP&L QA/QC was not getting copies of these records for review and that these records which were being generated by Law Engineering QC were not being sent to the site in a reasonable amount of tim Further review of records and data supplied by the licensee did show that the correct amount of materials were being included in the mixes being batched at the plant. The inspector cautioned the licensee at the exit that Law Engineering QC inspectors need to do a better job documenting test data, that the documentation needs to be submitted to CP&L in a reasonable amount of time, that CP&L needs to distribute these records to the responsible reviewers, and that these records need to be reviewed to verify that the correct information is included in these record Review of records documenting quantity of concrete materials being batched was identified as Inspector Followup Item 50-261/86-27-01, Review of Records Documenting Quantity of Concrete Materials being Batched at Batch Plant.