IR 05000335/1982010
| ML20054D896 | |
| Person / Time | |
|---|---|
| Site: | Saint Lucie  |
| Issue date: | 04/02/1982 |
| From: | Ang W, Herdt A NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | |
| Shared Package | |
| ML20054D890 | List: |
| References | |
| 50-335-82-10, 50-389-82-11, IEB-79-02, IEB-79-14, IEB-79-2, NUDOCS 8204230483 | |
| Download: ML20054D896 (5) | |
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UNITED STATES NUCLEAR REGULATORY COMMISSION o
5-e REGION 11
8 101' MARIETTA ST., N.W., SUITE 3100
ATLANTA, GEORGlA 30303
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d Report No. 50-335/82-10, 50-389/82-11
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Licensee:
Florida Power and Light Company P. O. Box 529100 Miami, Florida 33152
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Facility Name:
St. Lucie Nuclear Plant Docket Nos. 50-335, 50-389
License Nos. DPR-67 and CPPR-114
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Inspection at St. Lucie site near Ft. Pierce, Florida Inspector:
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W. P. Ang Date Signed Approved by:
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A. R. Herdt, Section Chief Date Signed j
Engineering Inspection Branch j
Division of Engineering and Technical Programs i
SUMMARY
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Inspection on March 9-12, 1982
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Areas Inspected
This routine, announced inspection involved 21 inspector-hours on site in the areas of seismic analysis for as-built safety-related piping systems (IEB 79-14);
and pipe support baseplate designs using concrete expansion anchor bolts (IEB 79-02).
Results
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Of the areas inspected, no violations or deviations'were identified.
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REPORT DETAILS 1.
Persons Contacted Licensee Employees
- C. M. Wethy, Plant Manager, Unit 1
- B. J. Escue, Plant Manager, Unit 2
- J. Krumins, Site Representative, Power Plant Engineering, Unit 1
- G. Crowell, Site Representative, Power Plant Engineering, Unit 2
- T. Dillard, Assistant Maintenance Superintendent, Mechanical, Unit 1
- J. L. Parker, Project Quality Control Supervisor, Unit 2 Carlos Carlo, QC Supervisor, Mechanical, Unit 2 D. Behres, QC Supervisor, Mechanical, Unit 2 Other Organizations Ebasco Engineering
- T. Tarte, Project Engineer, Unit 1
- R. Garramore, Senior Resident Engineer, Unit 2 NRC Resident Inspector
- S. Elrod
- H. E. Bibb
- Attended exit interview 2.
Exit Interview The inspection scope and findings were summarized on March 12, 1982, with those persons indicated in paragraph 1 above. The inspector described the areas inspected and discussed in detail the inspection findings listed below. No dissenting comments were received from the licensee.
(0 pen) Inspector Follow-up Item 335/82-10-01: IEB 79-14 Item 4.d - Procedure To Prevent Recurrence of Piping / Pipe Support Discrepancies paragraph 5.
(0 pen) Inspector Follow-up Item 389/82-11-01:
IEB 79-14 Walkdown Program Requires Stress Analyst Input paragraph 5.
(0 pen) Unresolved Item 389/82-11-02: Valve IV-07-1529 Body to Bonnet Stud Thread Engagement paragraph 5.
Licensee Action on Previous Inspection Findings Not inspected.
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4 Unresolved Items Unresolved items are matters about which more information is required to determine whether they are acceptable or may involve violations or devia-tions. New unresolved items identified during this inspection are discussed in paragraph 5.
5.
Seismic analysis for As-Built Safety-Related Piping Systems (IEB 79-14)
a.
Unit 1 - A follow-on inspection to those documented on NRC RII report numbers 50-335/81-31 and 81-26 was performed to verify licensee com-pliance with IEB 79-14 requirements and commitments.
(1) Paragraph 6 of report 81-26 noted several outstanding issues required for compliance with IEB 79-14.
Paragraph 6.(a) noted that inspection records for the RC loop was not available on site.
During this inspection, as-built drawings for the RC f oop was available. However, documentation verifying the accuracy of the drawings and verifying its applicability to the stress analysis was still being researched by the licensee.
(2) Paragraph 6.(c) of RII report 81-26 noted need for the licensee to address item 4.d of IEB 79-14 concerning procedures for future modification of piping and pipe supports.
Paragraph 6 of this report discusses Unresolved Item 335/82-03-02 which further points out a need for this procedure.
Pending licensee issuance of a procedure to provide for item 4.d of the Bulletin, this shall be identified as inspector Follow-up Item 335/82-10-01, IEB 79-14 Item 4.d - Procedure to Prevent Recurrence of Piping / Pipe Support Discrepancies.
b.
Unit 2 - A follow-on inspection to the one documented on NRC/RII report 50-389/81-24 was performed to verify licensee compliance with IEB 79-14 requirements and commitments.
The licensee had developed a Phase II piping and pipe support walkdown inspection program to supplement the individual pipe support installation inspections.
The licensee had performed a trial walkdown inspection of a portion of the Safety Injection System shown on piping isometric drawing SI-N-4.
Tnis portion was reinspected by the inspector.
The following items were noted:
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(1) Additional stress analysts input to the walkdown program was needed to specify inspection details and accuracy to assure that l
the as-built condition corresponds with the seismic analysis.
(2) Verification of valve weights and centers of gravity by verifying valve system designators could lead to potential errors if the system designators are not verified to specific valve vendor and drawing number.
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(3) Additional-QC training appeared to be required to assure correct
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-inspection details and accuracy of measurements.
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(4) Verification of piping penetration details had not been included in the program.
The licensee committed to evaluate the above noted items and to provide for the corresponding IEB 79-14 items. Pending licensee action, this item was identified as inspector follow-up item 50-389/82-11-01, IEB 79-14 walkdown program outstanding items.
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During the inspection of piping on isometric SI-N-4, the inspector noted that the studs for the body to bonnet flange of valve IV-07-1529 was threaded approximately halfway into the body flange. Although the thread engagement appeared to be equivalent to the nut thickness on the body side -(i.e., thread strength was equivalent), valve bonnet stabi-lity and potential stud loosening was questioned.
The inspector was-not able to verify conformance of the condition to the valve drawing and -engineering evaluation of the noted condition during the inspec-t tion. Pending further inspection, this item was identified as unre-solved item 50-389/82-11-02, Body to Bonnet Stud Thread Engagement of Valve IV-07-1529.
Pending licensee completion of IEB 79-14 requirements, the bulletin shall remain open.
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No violations or deviations were identified.
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6.
Pipe Support Baseplate Designs Using Concrete Expansion Anchors (IEB 79-02)
a.
Unit 1 - Unresolved Item 50-335/82-03-02 identified the need for an
engineering evaluation of the repairs of concrete expansion ancho_rs of Pipe Support SI-971-6234.
A review of the documentation for pipe support SI-971-6234 and discussion with QC, maintenance, and power plant engineering personnel revealed that: (1) two concrete expansion anchors for the pipe support were identified by QC to be deficient; (2)
maintenance issued plant work order 108942 to repair the deficient anchor; (3) nonco'nformance' report 039 noted that the replacement studs were installed askewed; and, (4) the condition was dispositioned by power plant engineering as being acceptable.
The original condition
had been noted by the licensee during IEB 79-02 inspections and the four bolt base plates were analyzed with one bolt in each plate missing. The remaining bolts were found to be sufficent to hold its
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design load with the IEB 79-02 required safety factor of 5.
A review of 1981 primary plant work orders revealed no other similar conditions.
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Although the condition was technically acceptable, the unresolved item was left open pending further review of the quality assurance / quality
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control aspects of the item. Since the condition further reinforced i
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the need for detailed instructions to provide for item 4.d of IEB 79-14, to prevent recurrence of piping / pipe support discrepancies, inspector follow-up item 389/82-11-01 (see also paragraph 5 of this report) was opened to assure compliance with IEB 79-02 and IEB 73-14 requirements.
Pending verification of completion of all IEB 79-02 requirements, the bulletin will remain open. No violations or devi-ations were identified.
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