IR 05000454/1979010
| ML19249B293 | |
| Person / Time | |
|---|---|
| Site: | Byron  |
| Issue date: | 07/10/1979 |
| From: | Konklin J, Neisler J, Williams C NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | |
| Shared Package | |
| ML19249B285 | List: |
| References | |
| 50-454-79-10, 50-45579-10, NUDOCS 7909040239 | |
| Download: ML19249B293 (5) | |
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U.S. NUCLEAR REGULATORY COMMISSION
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OFFICE OF INSPECTION AND ENFORCEMENT
REGION III
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Report No. 50-454/79-10; 50-455/79-10 Docket No. 50-454; 50-455 License No. CPPR-130; CPPR-131 Licensee: Commonwealth Edison Company
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P. O. Box 767 Chicago, IL 60690 Facility Name:
Byron Nuclear Generating Station, Units 1 and 2 Inspection At:
Byron Site, Byron, Illinois Inspection Conducted: June 19-20, 1979
. c-Inspectors:
J. E. Konklin-r/fc"/yt'
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J. H. Neis'ier
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Approved By:
C. C. Williams, Acting Chief
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Projects Section 2
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Inspection Summary Inspection on June 19-20, 1979 (Report No. 50-454/79-10; 50-455/79-10)
Areas Inspected: Ongoing site construction activities; licensee actions relative to previously identified unresolved items and items of noncompliance; licensee actions relative to resolution of IE Bulletin 78-10.
The inspection involved a total of 30 inspector-hours on site by two NRC inspectors.
Results: No items of noncompliance or deviations were identified in the areas inspected.
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DETAILS
Persons Contacted
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Principal Licensee Employees
- G. Sorensen, Project Superintendent
- J. Mihovilovich, Lead Structural Engineer
- R. Tuetken, Lead Mechanical Engineer
- G. Smith, Lead Electrical Engineer
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- S. Forsha, QA Structural Coordinator
- M. Pendleton, Field Engineer
- J. Porter, QA Mechanical Coordinator
- L. Combs, QA Inspector
- R. Westbury, QA Engineer Hunter Corporation L. Hill, Auxiliary Building Supervisor Hatfield Electric W. Gratza, QA Supervisor The inspectors also contacted other licensee and contractor personnel, including craftsmen, QA/QC, technical and engineering staff.
- Denotes those attending the exit interview.
Licensee Action on Previous Inspection Findings (Closed) Noncompliance (454/79-06-01; 455/79-06-01):
Storage of mechanical penetration assemblies.
The previous RIII report noted that twelve mechanical (piping) penetration assemblies were found to be improperly stored in the Auxiliary Building.
During this inspection, the inspector inspected the Hunter Corporation storage of piping and mechanical penetra-tion assemblies in the Auxiliary Building and found no examples of improper storage. The inspector also discussed with the Hunter Corporation Auxiliary Building Supervisor the steps which are being taken by Hunter to ensure maintenance of proper storage conditions. This item is consi Jered to be resolved.
(Closed) Unresolved Item (454/79-06-02; 455/79-06-02): Test results for tendon assembly tensile tests.
The previous RIII report noted that the subject test results would be available and reviewed during a subsequent inspection.
During this inspection, the inspector reviewed reports of tendon assembly tensile tests by Wiss, Janney, Elstner and Associates, transmitted to CECO by S&L letter of June 4, 1979.
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tests on three tendon assemblies, 170W-TT-1, 170W-TT-2, and 170W-TT-3.
The licensee stated that tests on two additional tendon assemblies had been performed and were witnessed by CECO QA. This item is considered to be resolved.
Functional or Program Areas Inspected 1.
Review of Licensee Actions on Previous Inspection Findings The RIII inspectors reviewed the licensee's actions relative to the resolution of specific inspection findings which were identified in previous RIII inspection reports, and which were still in an open status prior to this inspection.
The items reviewed, and the licensee actions relative to the resolution of the items are discussed in the foregoing section of this report.
2.
Ongoing Plant Construction and Storage Activities A site tour was conducted to monitor the progress of site construction activities and the storage of safety related components and materials.
The areas inspected included the Unit 1 and 2 reactor containments, the fuel handling building, the auxiliary building, the essential service water cooling structures, and the warehouse storage of hangers, snubbers and post-tensioning tendons.
Specific observations made during the inspection are discussed bel" 3.
Unit 1 Containment Post-Tensioning Activities The inspectors observed activities related to the post-tensioning of the Unit I containment vessel.
At the time of the inspection, all (120) of the Unit I dome post-tensioning tendons were installed, although none had been tensioned. The six post-tensioning jacks and two of the six pumps were on site; the other four pumps were scheduled to arrive on site during the week of the inspection. The tensioning of the dome tendons should begin during the week of June 25, and should be completed in 3-4 weeks.
Installation and stressing of all 483 Unit 1 tendons is scheduled for completion by November 1979, although the schedule is tight, and does not allow for additional major problems.
During this inspection, the licensee informed the inspectors that areas of corrosion, with some pitting, had been found on a number of tendons which have been in storage for prolonged periods of time.
Of the 340 tendons inspected to date, 65 have been placed on hold because of the identified areas of corrosion.
The most severe corrosion, including some pitting, was found on tendons which had been stored on site for 15 to 19 months.
Readily removable rust areas, with no pitting, was found on tendons which had been on site for 12 to 14 months.
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The tendons, which have been in indoor storage at the site, have been inspected periodically during the term of storage.
The rust (and, in some cases, pitting) was found only on the outside wires at points where the tendons were held in the coiled position by support posts. The periodic inspections, which included unwrapping the two layers of protective plastic covering and removing the preservative coating from the ends of the coils, did not normally extend as far as the support posts.
The inspectors observed tendon rust areas and the inspection activities related to the corrosion problem, and reviewed the following documents:
Blount Brothers Corporation Deviation Report No. Q3-415, dated a.
June 5 and 6, 1979, which describes the initial tendon corrosion findings.
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S&L Notes of Meeting, dated June 13, 1979, which discusses the need for a more complete inspection and regreasing program for the stored tendons.
The S&L test program for evaluation of the tendon corrosion, c.
dated June 13, 1979.
Based on inspection of the tendons in storage, review of the above documents, and discussions with the licensee, the inspectors concluded that appropriate actions are being taken to identify, evaluate, and correct the post-tensioning tendon corrosion problem.
Further inspection in this area will be done as part of the followup by RIII on the existing 50.55(e) item regarding post-tensioning tendon deficiencies.
4.
Electrical Inspection Activities The inspectors observed activities relating to the installation of safety related cables and cable trays.
Permanent identification markings have not been placed on safety related cable trays in the Unit I cable spreading room beneath the control room.
The trays have been identified by writing their identifying numbers on the sides of the tray with a felt tipped marker (magic marker).
The licensee stated that permanent identifi-cation markers have been purchased and will be placed on the trays when received on site.
To test the adequacy of the temporary identification method'of cable tray identification, the inspectors selected one cable pull card for tracing the cable routing.
The selected pull card indicated the cable (No. 1EF015) routing from the main control board through several cable trays and into the safeguards test cabinet. The-4-m) U}.*.*:'f G"'
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inspectors traced the cable throughout its length and verified that
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the start point, end point and routing through the safety related trays was as indicated on the pull card.
No items of noncompliance or deviations were noted in this area.
5.
Piping Headers Essential Service Water Cooling Towers The inspectors reviewed quality assurance documentation including NPP-1 Data Reports, weld bend and tensile tests, mangetic particle test reports, and hydrostatic test reports on essential service water cooling tower piping header spool pieces; F-40-1, F-40-2, F-41-1, F-41-2, F-41-3, F-41-4, F-22-1, F-22-2, F-22-3 and F-22-4.
No items of noncompliance or deviations were noted in this area.
6.
Inspection and Enforcement Bulletin 78-10 "Bergen Paterson Hydraulic Shock Suppressor Accumulator Spring Coils" The inspectors verified licensee's response that no Bergen-Paterson snubbers (shock suppressors) are installed or in ready spares.
By observation of snubbers in safety related piping systems during four hours of p? ant walk through and by inspection of the Byron safety related snubber / hanger storage warehouse, the inspectors determined that Bergen-Paterson hydraulic snubbers are not being used at Byron.
Action relative to this bulletin is closed.
7.
Battery Room The inspectors questioned the battery room arrangement in which the battery is separated from the other equipment in each battery room, in Unit 1, by a wire mesh screen.
Presently, one room contains a battery charger, DC breaker panel and the battery.
The other room contains t he same equipment plus inverters for changing DC to AC power.
The licensee's representative showed that this streened partition was in accordance with drawings in the Fire Protection Report sub-mitted with the Byron Final Safety Analysis Report.
Exit Interview The inspectors met with site staff representatives (denoted under Persons Contacted) at the conclusion of the inspecticn on June 20, 1979.,The inspectors summarized the purpose and findings of the inspection. The licensee acknowledged the findings reported herein.
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