IR 05000254/1986021
| ML20212B619 | |
| Person / Time | |
|---|---|
| Site: | Quad Cities  |
| Issue date: | 12/19/1986 |
| From: | Muffett J, Westberg R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | |
| Shared Package | |
| ML20212B599 | List: |
| References | |
| 50-254-86-21, 50-265-86-21, NUDOCS 8612290282 | |
| Download: ML20212B619 (3) | |
Text
e-o U.S. NUCLEAR REGULATORY COMMISSION
REGION III
Reports No. 50-254/86021(DRS); 50-265/86021(DRS)
Docket Nos. 50-254; 50-265 Licenses No. DPR-29; DPR-30 Licensee: Commonwealth Edison Company P.O. Box 767 Chicago, IL 60690 Facility Name: Quad Cities Nuclear Power Station, Units 1 and 2 Inspection At: Cordova, Illinois Inspection Conducted: December 9, 1986 da M h
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g Inspector:
R. A. Westberg 12/t9 )86 Dats b-k1k
&wo Approved By:
J. W. Muffett, Chief 12/6/8L Plant Systems Section Date Inspection Summary Inspection on December 9, 1986 (Reports No. 50-254/86021(DRS);
No. 50-265/86021(DRS))
Areas Inspected: Special, announced inspection by one regional inspector of environmental qualification of electrical splices.
Results: No violations or deviations were identified.
8612290282 861219 PDR ADCCK 05000254 O
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DETAILS 1.
Persons Contacted Commonwealth Edison Company (CECO)
D. Box, Station Manager
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R. Roben, Services Superintendent D. Gibson, Quality Assurance Superintendent M. Kooi, Regulatory Assurance M. Slevert, Technical STeff (E.Q.)
US NRC A. Morrongiello, Resident Inspector J. Jacobson, Vendor Programs Branch 2.
Review of Repair of Unqualified Electrical Splices On December 5, 1986, the licensee notified Region III that it was shutting down Unit 1 because the electrical splices in the Drywell Penetrations did not meet environmental qualification requirements.
These splices were in-line nylon insultated butt splices that were supplied by General Electric (GE) during the original construction of the plant.
The splices were manufactured by AMP, Hollingsworth, or T&B Products.
The splices were determined to be unqualified on the basis of tests conducted December 4 and 5, 1986. These tests were conducted because of concerns raised by the NRC staff during the environmental qualification inspection at Dresden. After the splices failed the tests, the licensee declared an Unusual Event and shut down Unit 1 (Unit 2 was already shutdown for a refueling outage).
The licensee reported that each unit had approximately 150 splices that had to be repaired. The purpose of this report was to review the repairs and the environmental qualification status of the materials employed in the repair.
a.
Documents Reviewed (1) Procedure No. QMP 100-00, " Scotch Brand Tapes EQ Installation Instructions," Revision 1.
(2) Work Request No. 53811 - Splice Repair.
(3) Environmental Qualification Report No. CQD-029164,
"3M Electrical Cable Splice Assemblies.
(4) Temporary Procedure Change No. 4399.
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(5) Engineering Evaluation No. 157, " Scotch Brand 130c Tape."
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(6) Engineering Evaluation No. 158, " Scotch Brand 33+ Tape."
(7) Safety-related Dedication No.86-072, " Scotch Brand 130c Insulating Tape."
(8) Safety-related Dedication No.86-073, " Scotch Brand 33+
Jacketing Tape."
b.
Inspection Results (1) The repair Procedure, No. QMP 100-60, was properly reviewed and approved, including Temporary Change No. 4399, which clarified the procedure and added a cut-away drawing of the completed splice. The procedure was technically acceptable.
(2) The repair procedure stipulated Scotch Brand 130c insulating tape and 33+ jacketing tape for the repair. The plant did not have any safety-related environmentally qualified 130c or 33+
tape; however, they did have a supply of both types of tape classified non safety-related. An engineering evaluation was performed and the materials were upgraded to safety-related commercial grade. This made the tape acceptable for use in EQ installations since the CECO QA Manual dictates that only safety-related material be used for EQ systems.
(3) The package for Work Request No. 53811 identified all the affected penetrations and their associated splices. These were IX-100B, 1X-100G, 1X-104F, 1X-105A, and 1X-1058.
(4) Scotch Brand 130c and 33+ tape have been evaluated for use in the plant and documented in EQ Binder No. 29164.
Further, Wyle Labs tested splices with similar configurations as those in Procedure No. QMP 100-60.
Tne test report (Wyle Preliminary Test Report dated November 7, 1986) documents that the splices met IEEE 323-1974 and that they can be used for inside drywell applications and for repair of nylon splices used on GE penetrations.
Based on the above, the Staff found the splice repairs acceptable.
3.
Exit Interview The NRC inspector met with licensee representatives on December 9,1986, and summarized the purpose, scope, and findings of the inspection. The inspector also discussed the likely informational content of the inspection report with regard to documents or processes reviewed by the inspector during the inspection.
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