IR 05000259/1986030
| ML18031A893 | |
| Person / Time | |
|---|---|
| Site: | Browns Ferry  |
| Issue date: | 09/29/1986 |
| From: | Blake J, Vias S NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | |
| Shared Package | |
| ML18031A892 | List: |
| References | |
| 50-259-86-30, 50-260-86-30, 50-296-86-30, IEB-79-02, IEB-79-14, IEB-79-2, NUDOCS 8610220161 | |
| Download: ML18031A893 (8) | |
Text
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UNITED STATES NUCLEAR REGULATORY COMMISSION
REGION II
101 MARIETTASTREET, N.W.
ATLANTA,GEORGIA 30323 Report Nos.:
50-259/86-30, 50-260/86-30, and 50-296/86-30 Licensee:
Tennessee Valley Authority 6N38 A Lookout Place 1101 Market Street Chattanooga, TN 37402-2801 Docket Nos.:
50-259, 50-260 and 50-296 License Nos.:
DPR-33, DPR-52, and DPR-68 Facility Name:
Browns Ferry 1, 2, and
Inspection Conducted:
August 25-.29, 1986 Inspector:
S. J.
s Approved by:
J.
J B a e, Section Chief Mat r's and Processes Section En ineering Branch Division of Reactor Safety Date Signed 9 gc, gg Date Signed SUMMARY Scope:
This routine, unannounced inspection wis conducted in the areas of seismic analysis per as-built safety-related piping systems (IE Bulletin 79-14),
pipe support baseplate designs using concrete expansion anchor bolts ( IE Bulletin 79-02)
and drywell platforms in conjunction with the modification programs.
Results:
No violations or deviations were identified.
Sb102201b1 Sb1010 PDR ADOCK 05000259
REPORT DETAILS 1.
Persons Contacted
Licensee Employees R.
C. Lewis, Plant Manager
- E. A. Grimm, Assistant Plant Manager
- R. 0. Shultz, Plant Compliance
- J. A. Savage, Plant Compliance
- E. Thomas, Project Management
- R. Cutsinger, Civil Engineering Branch (CEB)
T. Brothers, Lead Civil Engineer, CEB D. Nye, Design Services D. Gyse, Engineer, CEB E. Gaines, Section Supervisor, CEB R. Kroon, Engineer, Office of Engineering Other licensee employees contacted included engineers, technicians, and office personnel.
NRC Resident Inspectors
- G. Paulk, Senior Resident Inspector
- C. Patterson, Resident Inspector
"C. Brooks, Resident Inspector
- Attended exit interview 2.
Exit Interview The inspection scope and findings were summarized on August 29, 1986, with those persons indicated in paragraph 1 above.
The inspector described the areas inspected and discussed in detail the inspection findings.
No dissenting comments were received from the licensee.
The licensee did not identify as proprietary any of the materials provided to or reviewed by the inspector during this inspection.
3.
Licensee Action on Previous Enforcement Matters a.
(Open)
Unresolved Item 259, 260, 296/86-14-03, Overstress of Drywell Beams The licensee issued Nonconformance Report (NCR)
BFNCEB 8402, which was classified as significant condition adverse to quality in March 1984.
At that time, it was discovered that the drywell platform steel at
gl
b.
elevations 563 and 584 had not been analyzed following the addition of significant loads during plant modifications.
(For further details, see paragraph 5.)
This item remains open pending further review of work being done in this area.
(Closed) Violation 259, 296/85-26-01, Failure to Follow Procedures for Support Inspection.
This item involved pipe supports that were inspected against their detailed drawings for configuration, identification, location, fastener installation, welds and damage/protection.
These supports were associated with the torus modifications.
The report detailed five supports that were not installed and verified in accordance with the design drawings and BF MAI-23, "Support of Piping Systems in Category I Structures" requirements.
As a result, the five supports may not be able to perform their intended function as required by the design.
The inspector reviewed the licensee's responses to the violation dated June 14, July 3, and July 31, 1986.
The July 31, 1986, submittal provided the details of the corrective actions taken concerning the five supports listed in the Notice of Violation.
MAI-23 was revised and approved on February 7, 1986, to change inspection criteria to insure correct pipe support installation and add vendor information.
To correct the defi'ciencies in the program, reinspection of supports is performed per a
"Special Mechanical Maintenance Inspection (SMMI)
14.4. 1.3-L which included additional detailed instruction for re-inspections to ensure holdpoints, and that acceptance criteria is more clearly defined.
The inspector reviewed the above documents and found that they will assure that a
more detailed review of support installation will be performed, also reviewed were documents indicating that the appropriate personnel receive proper training to ensure compliance with the above documents.
This item is considered closed.
C.
(Closed)
Inspector Followup 259, 260/85-30-01, Corrective Action on Inspected Pipe Supports This item involved pipe supports similar to the supports identified in the above violation (85-26-01).
The same discrepancies were identified and the corrective action stated in the above paragraph 3b, covers the problems in this item.
The licensee has included the supports into their program for modifications.
This item is consider ed closed.
4.
Unresolved Items Unresolved Items were not identified during the inspectio if
Evaluation of Drywell Platforms Steel (25529)
The inspector reviewed Nonconformance Report (NCR)
BFNCEB 8402.
The licensee classified this NCR as a significant condition adverse to quality in March 1984.
At that time, it was discovered that the drywell platform steel at elevations 563 and 584 had not been analyzed following the addition of significant loads during plant modifications.
Further licensee investigations revealed other discrepancies in the platform design calculations.
These are:
I) some eccentric loads were not included, 2)
some uplift loads were not included, 3)
some calculations were not second checked, and 4) the structural behavior of the overall platform under combined loads was not analyzed.
The licensee has completed a walkdown of Unit 2 Drywell Platforms, which has determined the as-built configuration of the platforms.
The drawings showing the platform framing are, 67-S-4-48N443 and 67-S-4-48N442 for elevations 584'
9" and 563'
0$ ", respectively.
The scope of work for the drywell is being implemented by "Scope of Work Document for - Browns Ferry Nuclear Plant, Disposition of NCRCEB 8402, R/I - Drywell Floor.Steel" approved 12/28/84.
The platforms are being verified by "Special Mechanical Maintenance Instruction (SMMI) 1. 1-E" approved November 9, 1984 and BFEB PI-86-08,
"Program for the Walkdown of Miscellaneous Steel."
During discussions with the Office of Engineering in Knoxville, Tennessee, the inspector was informed that the loading used in the analysis of the drywell framing is coming from the recent IEB 79-14 walkdown and reanalysis of the piping that is attached to the platforms.
The analysis of the platforms, for Unit 2, has been started, and after the initial evaluation approximately one third of the 366 connections identified were found to be overstressed.
A second evaluation taking into account load phasing, has reduced'he number of overstressed connections to approximately 75.
At this time, no beams have been overstressed based on the analysis completed.
In discussion with the site engineering, the inspector learned that another area being reviewed was the Control Bay, Elevations 606.0 and 617.0.
This work is being controlled by a set of instructions specific 'to the Control Bay, issued December 24, 1985.
Pending completion of the analysis and the licensee's reportabi lity determination, this item remains open as Unresolved Item 259, 260, 296/86-14-03, Overstress of Drywell Beams.