ML20024A405
| ML20024A405 | |
| Person / Time | |
|---|---|
| Site: | Fermi  |
| Issue date: | 05/27/1983 |
| From: | Wells D DETROIT EDISON CO. |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| 10CFR-050.55E, 10CFR-50.55E, 71, EF2-63507, EF2-635607, NUDOCS 8306170233 | |
| Download: ML20024A405 (2) | |
Text
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[/h8 Donald A. Wells ManagerOuauty Asstsance (3m 237 9657 I
n NoI*Og^aTll22e May 27, 1983 (313) 2n-a EF2-63507 Mr. James G. Keppler, Regional Administrator Region III U. S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, Illinois 60137
Subject:
Final Report of 10CFR50.55(e) Item on Improper Assembly of Core Spray Pump (#71)
Dear Mr. Keppler:
This is Detroit Edison's final report involving the improper assembly of a core spray pump (PIS #E21-01-C001A). This item was originally reported to Mr. L. Reyes of NRC Region III by Detroit Edison's Mr. H. A. Walker, Supervisor - Construction Quality Assurance, on June 15, 1982.
During Startup testing of the respective pump, it was noted that the pump discharge pressure was approximately 30 pounds rather than the required 300 pounds. Disassembly of the pump revealed that the impel-1er had been installed on the shaft backwards. During refurbishment of this pump by a site contractor, it was noted that the pump shaft was bent. Even though the impeller itself was marked " Nut End", and the contractor's workers were aware of the marking, the impeller was improperly installed. Documents used by the contractor for replace-ment of the shaft did not provide sufficient instruction to ensure proper reassembly of the shaf t and impeller. Byron Jackson, manufac-l turer of the pump, has been notified of this possible deficiency in the technical manual.
i The possibility of the pump being placed in service with an improperly installed impeller is slight since according to Project procedures, l
the pump must pass performance tests during construction, startup and l
maintenance activities. This incident occurred during performance l
testing while under construction which triggered the investigation leading to the successful resolution to the problem.
Corrective action is complete, in that the shaf t was repaired and the impeller has been reinstalled in the correct orientation via a I
revision to the maintenance procedure, which now includes a step for verifying correct orientation of the ' impeller. This will assure satisfactory disassembly and reassembly in the future.
l Further, Detroit Edison Project Quality Assurance has instituted a program of reviewing the contractor's Operation Process Travelers to to help ensure adequate instructions are included.
I l
B306170233 ganggy 1
gDRADOCK 05000341 PDR 3g7 g Q
Mr. Jrf.no C. K2pplsr, Regicnnl Administrator May 27, 1983
' EF2-63507 Page Two If you have questions concerning this matter, please contact-1 Mr. G. M. Trahey, Assistant Director - Project Quality Assurance.
Very truly yours, DAW /WEM/pn' b
cc:
Mr. Richard DeYoung, Director Office of Inspection and Enforcement U. S. Nuclear Regulatory Commission Washington, D.C.
20555 Mr. Bruce Little, Senior Resident Inspector U. S. Nuclear Regulatory Commission 6450. North Dixie Highway Newport, Michigan 48166 I
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