TXX-6619, Final Deficiency Rept CP-87-09 Re Terminal Studs in PK-2 Test Blocks.Initially Reported on 870507.Insp of Studs Revealed No Defects.Vendor,Ge,Replaced Studs as Conservative Measure.Condition Not Reportable Per 10CFR50.55(e)
| ML20236N331 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 08/07/1987 |
| From: | Counsil W TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC) |
| To: | NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM) |
| References | |
| CP-87-09, CP-87-9, TXX-6619, NUDOCS 8708110457 | |
| Download: ML20236N331 (1) | |
Text
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Log # TXX-6619
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File # 10110 3
908.3
-Z--
E Ref: 10CFR50.55(e)
TUELECTRIC William G. Counsil Executive %ce Prnident 1
U. S. Nuclear kegulatory Commission Attn:
Document Control Desk Washington, D. C. 20555 l
SUBJECT:
COMANCHE PEAK STEAM ELECTRIC STATION (CPSES)
DOCKET N05. C0-445 AND 50-446 TERMINAL STUDS IN PK-2 TEST BLOCKS SDAR:
CP-87-09 (FINAL REPORT)
Gentlemen:
i On May 7,1987, we verbally notified your Mr. Cliff Hale of a deficiency 1
invohing terminal studs in PK-2 test blocks. Ve have submitted an interim report logged TXX-6495, dated June 5, 1987.
i Visual inspection of the studs used in PK-2 test blocks was performed and no defects were observed. A review of the applicable elementary diagrams was also performed which determined that the test blocks were located on test circuit for the 6.9kV switchgear and not on operating circuit.
Failure of a PK-2 test block as installed in relay circuitry at CPSES would not cause equipment or system failure.
As a conservative measure, the existing studs in PK-2 test blocks are being replaced as recommended by the vendor (General Electric). The replacement studs will be manufactured with the proper material and will also receive the required stress relief.
In the event this deficiency had remained undetected, no condition adverse to the safety of plant operations would exist.
Therefore, this deficiency is not reportable under the provisions of 10CFR50.55(e).
Records supporting this conclusion are available for your inspectors to review at the CPSES project site.
Very truly yorrs, 8708110457 870807 PDR ADOCK 05000445 s
pon W. G. Counsil WJH/mlh c - Mr. R. D. Martin, Region IV
[
Resident Inspectors, CPSES (3) y sO M)O North Olive Street LB 81 Dallas, To u 73201