TXX-6430, Part 21 & Interim Deficiency Rept CP-87-05 Re Failure of High Range Radiation Monitor Coaxial Cables to Meet Min Environ Qualification for Dielectric Insulation Requirement. Initially Reported on 870406.Next Rept Expected by 870721
| ML20215L777 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 05/06/1987 |
| From: | Counsil W, Keeley G TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC) |
| To: | NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM) |
| References | |
| REF-PT21-87, REF-PT21-87-119-000, RTR-REGGD-01.097, RTR-REGGD-1.097 CP-87-05, CP-87-5, PT21-87-119, PT21-87-119-000, TXX-6430, NUDOCS 8705120371 | |
| Download: ML20215L777 (2) | |
Text
. _ - - _ _ _ _ _ _ _ _ _ _ _ .
= --
File # 10110 903.11
= = Ref #10CFR50.55(e) nlELECTRIC
% HNam G. ( ound May 6, 1987 U. S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, D.C. 20555
SUBJECT:
COMANCHE PEAK STEAM ELECTRIC STATION (CPSES)
DOCKET NOS. 50-445 AND 50-446 ENVIRONMENTAL QUALIFICATION 0F CABLE TO POST-LOCA HIGH RANGE RADIATION MONITOR SDAR: CP-87-05 (INTERIM REPORT)
Gentlemen:
On April 6,1987, we verbally notified your Mr. C. Hale of a deficiency involving the failure of High Range Radiation Monitor (HRRM) coaxial cables to meet the minimum cable environmental qualification for dielectric insulation requirements. This is an interim report of a potentially reportable item under the provisions of 10CFREO.55(e).
We have reviewed the Sorrento Electronics (SE) 10CFR21 Notification and have verified that it is applicable to CPSES equipment. This notification affects
, the following equipment for Units I and 2:
- 1) High range radiation monitors (1-RE-6290A&B; 2-RE-6290A&B)
- 2) Cables (EG028511Z, EG028512Z, EG028682Z, and EG028683Z) between the HRRH detector and the HRRM field mounted microprocessor (RM-80).
The specific deficiency relates to the dielectric insulation resistance required of the sub, Ject cables to allow the HRRM to operate within the guidelines established by Regulatory Guide 1.97. The cable dielectric insulation resistance failed to meet minimum requirements.
87 y Sig{ 87g50 N p/a
.3 m,,,3 oin, s,,,,, i ,,. 3, ,3,ii,,,3, m 732o, s = ,
.3
. TXX-6430 May 6, 1987 Page 2 of 2 Our evaluation of this issue, with regard to the safety of plant operations, is contingent upon the recomendation of corrective actions.by SE. While SE has comitted to provide the necessary corrective actions, they have not yet been received.
We anticipate submitting our next report on this issue no later than July 21, 1987.
Very truly yours, W. G. Counsil By:. ,
L G. S. Keeley Manager, Nuclear ensing DAR/gj c - Mr. E. H. Johnson - Region IV Mr. D. L. Kelley, RI - Region IV Mr. H. S. Phillips, RI - Region IV