ML20195H281
| ML20195H281 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 01/11/1988 |
| From: | Counsil W TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC) |
| To: | NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM) |
| References | |
| CP-88-12, TXX-88071, NUDOCS 8801190191 | |
| Download: ML20195H281 (2) | |
Text
ME Log # TXX-88071
. ~ " "
File # 10110
_r C
908.3 Ref. # 10CFR50.55(e) i 7UELECTRIC
- UMOSd51, January 11, 1988 U. S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, D.C.
20555
SUBJECT:
COMANCHE PEAK STEAM ELECTRIC STATION DOCKET N0. 50-445 CLASS 1E AND NON-CLASS 1E CABLE SEPARATION SDAR:
CP-88-12 (INTERIM REPORT)
Gentlemen:
We are hereby reporting a significant deficiency involving a violation of electrical separation criteria under the provisions of 10CFR50.55(e).
The required information follows.
DESCRIPTION OF DEFICIENCY Two cables (E0140291 and EG140305) have been observed which are designated Class IE, but do not perform a Class 1E function and which are directly connected to non-Class 1E cables at racks CP1-EIPRCI-01 and 02.
These cables are routed with other Class 1E cables.
This deficiency was found during our complete design review of safety-related external cabling and is considered isolated.
This deficiency was apparently due to failure to implement the Class 1E and non-Class 1E separation criteria as specified in the CPSES FSAR.
SAFETY IMPLICATIONS Failure of these cables could affect other Class IE cables and circuits.
This represents a significant deficiency in final design as approved and released for construction such that the design does not conform to the criteria and bases stated in the FSAR.
PDR ADOCK 05000445 l0
,S DCD
TXX-88071 January 11, 1988 Page 2 of 2 Had this condition remained uncorrected it could'have had an adverse effect/on the safety of plant operations, and therefore we-have conservatively deemed it to be reportable under the provisions of 10CFR50.55(e).
CORRECTIVE ACTION Cables E0140291 and EG140305 will be redesignated non-Class IE and will be rerouted in non-Class IE raceways.
In addition, the Corrective Action Program will identify, document and correct any other separation problems that may exist with Class 1E cables in accordance with approved CPSES procedures.
To preclude recurrence of this condition, separation criteria have been defined in Design Basis Document DBD-EE-57, "Separation Criteria." A reinspection of safety-related electrical equipment is being implemented under the Post Construction Hardware Validation (PCHV) Program via FVM-EE/ME/IC/CS-088, entitled "PCHV Program for Engineering Reverification of Electrical Separation Our next report on this issue will be submitted no later than April 8,1988.
At that time we intend to discuss the implementation schedule for the corrective action.
Very truly ye' irs, Zi W. G. Counsil WJH/grr c - Mr. R. D. Martin, Region IV Resident inspectors, CPSES (3)
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