PLA-1528, Interim Deficiency Rept Re Defective GE Hma Auxiliary Relays Resulting in Insufficient Clearances Between Armature Tail Piece & Molded Posts.Initially Reported on 830119.Final Rept by 830601.Also Reported Per Part 21
| ML20071B887 | |
| Person / Time | |
|---|---|
| Site: | Susquehanna  |
| Issue date: | 02/18/1983 |
| From: | Curtis N PENNSYLVANIA POWER & LIGHT CO. |
| To: | Haynes R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| REF-PT21-83 10CFR-050.55E, 10CFR-50.55E, PLA-1528, NUDOCS 8303010267 | |
| Download: ML20071B887 (3) | |
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PPaL Pennsylvania Power & Light Company Two North Ninth Street
- Allentown, PA 18101 e 215 / 770 5151 l
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Norman W. Curtis Vice President-Engineering & Construction-Nuclear 215 / 770-5381 m
l Mr. R. C. Haynes Regional Administrator, Region I U.S. 1uclear Regulatory Commission 631 Park Avenue King of Prussia, PA 19406 fe h l$, $ $0 l
SUSQUEHANNA STEAM ELECTRIC STATION INTERIM REPORT OF A DEFICIENCY INVOLVING DEFECTIVE GE'HMA AUXILIARY RELAYS ER'100508 FILE 821-10 PLA-1528
Dear Mr. Haynes:
This letter serves to provide the Commission with an interim report on a deficiency involving defective CE HMA Auxiliary Relays. This deficiency was originally reported by telephone to Mr. D. Johnson of NRC Region I on 1/19/83 by Mr. J. Saranga of PP&L as potentially reportable under the requirements of 10CFR50.55(e) for SSES Unit II.
The attachment to this letter contains a description of the deficiency, its cause, and the corrective action taken and planned. PP&L anticipates providing the Commission with a final report on or before June 1, 1983. The final report will inc.lude PP&L's conclusion as to safety impact and report-ability. This information is furnished for Unit II pursuant to the provisions of 10CFR50.55(e).
Since the details of this report provide information relevant to the reporting requirements of 10CFR21 for Unit II, this correspondence is considered to also discharge any foraial responsibility PP&L may have in compliance thereto.
We trust the Commission will find this report to be satisfactory.
Very truly years,
/I N. W. Curtis Vice President-Engineering & Construction-Nuclear WLB:sab Attachment 8303010267 830218
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. SSES PLA-1528 ER 100508 File 821-10 Mr. R. C. Haynes cc Mr. Richard C. DeYoung (15)
Director-Office of Inspection & Enforcement U.S. Nuclear Regulatory Commission Washington, D.C. 20555-
.Mr. G. Mcdonald, Director Office of Management Information & Program Control U.S. Nuclear Regulatory Commission Washington, D.C. 20555 Mr. Gary Rhoads U.S. Nuclear Regulatory Commission P.O. Box 52 Shickshinny, PA 18655 l
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w PLA-1528 '
SSES PLA-1528 ER'100508 File?821-10 s
INTERIM REPORT SUBJECT
. GE. HMA~ AUXILIARY RELAYS DESCRIPTION OF DEFICIENCY
_The GE HMA' Auxiliary Relay is a genera 1' purpose. auxiliary relay, which is used as a contact multiplier. These relays are~used in various safety-related systems at Susquehanna.
G.E. has identified a manufacturing deficiency with GE HMA Auxiliary Belays
'which were produced in 1974. The deficieneymay have resulted in insufficient clearances between the armature tail piece and the molded posts on either side-of the tail piece.
If this condition exists. twisting of the armature may cause binding of the armature tail piece when the armature is energized and prevent
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opening'of the armature when it is de-energized.-
.CAUSE OF THE DEFICIENCY LGE's' investigation into the deficiency disclosed that there was a tool problem in the. manufacturing process in 1974.
CORRECTIVE ACTION TAKEN & PLANNED It-has been determined that approximately 115. relays manufactured during 1974
- are installed in safety related equipment on SSES Unit II.
An inspection of the Unit II. GE HMA relays used in safety-related applications is now being performed to determine if sufficient clearance exists between the armature tail piece and the molded posts on either side of the tail piece. This inspection
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is being performed under Bechtel QAR #917.
Relays with insufficient clearance will be reworked or replaced as necessary.
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