ML19323F189

Status Rept 5 of Potentially Reportable Deficiency Re Inadequate Circuit Separation.Investigation Expanded to Address Adequacy of GE Supplied Components & Control Room Panels.Final Rept by 801201

ML19323F189
Person / Time
Site:	Grand Gulf
Issue date:	05/15/1980
From:	Dale L MISSISSIPPI POWER & LIGHT CO.
To:
References
AECM-80-102, NUDOCS 8005280627
Download: ML19323F189 (2)

Text

9 c.

o 'i . .;

l MISSISSIPPI POWER & LIGHT ANY 1]

A Helping Build Mississippi P. O. B O X 16 4 0, J A C K S O N. MI S SI S S IP PI 3 9 2 6 5 PeoOUC?ICN D C P & a T to E N l' May 15, 1980 Office of Inspection & Enforcement U. S. Nuclear Regulatory Commission Region II 101 Marietta Street, N.W., Suite 3100 Aclanta, Georgia 30303 ATTENTION: Mr. J. P. O'Reilly, Director

SUBJECT:

Grand Gulf Nuclear Station Units 1 and 2 Docket Nos. 50-416/417 File 0260/15525/15526 PRD-79/07, Status Report #5, Inadequate Circuit Separation AECM-80/102

Dear Mr. O'Reilly:

On March 23, 1979, Mississippi Power & Light notified Mr. J. K. Rausch of your office of a Potentis11y Reportable Deficiency (PRD) at the Grand Gulf Nuclear Station (GGNS) construction site. The deficiency concerns circuit separation deficiencies associated with Unit 1;and 2 Power Generation Control Complexes (PGCC) .

Originally eur evaluation concentrated on the compliance with Regulatcry Guide 1.75 and IL.E Standard 384 of wi :ng terminating on common devices in the PGCC of Unit 2. Corrective actions associated with obvious deficiencies at these common devices have been accomplished. The investigation into the extent of the common device deficiency is complete. The analysis of discre-pancies noted required certain qualification testing, as per IEEE Standard 384.

The results of this testing are being analyzed at this time. Further corrective actions are contingent on the analysis of these results. With regard to discrepancies noted thus far, our evaluation has identified no items that constitute adverse effects on plant safety. The evaluation of safety implica-tA as, however, is still in progress.

g 8005280[>M Member Middle South Utilities System

.w_ ., -

L 0, C" MISSISSIPPI POWErt &* LIGHT COMPANY AECM-80/102 Page two A major expansion in the scope of this investigation was recently made in that the evaluation now addresses the adequacy of circuit separation in

. General Electric supplied PGCC components and control room panels and is not limited exclusively to that wiring terminating on common devices. This expanded scope applies to both units at GGNS.

Our current schedule for completing the analysis of the expanded investiga-tion call for the submittal of our final report on this deficiency to be no later than December 1, 1980.

l Yours truly, l

s V

J' /

b

.-4.A L. F. Dale Nuclear Project Manager

. JGC/JDR:lj

~

cc: Mr. N. L. Stampley Mr. R. B. McGehee Mr. T. B. Conner Mr. Victor Stello, Jr. , Director L #'

Division of Inspection & Enforcement U. S. Nuclear Regulatory Commission Washington, D. C. 20555 bec: Dr. D. C. Gibbs Mr. A. Zaccaria Mr. J. N. Ward Mr. D. M. Lake ,

Mr. J. P. McGaughy -

Mr. W. L. Nail Mr. T. E. Reaves Mr. C. K. McCoy Mr. J. W. Yelverton Mr. A. R. Smith Mr. M. D. Hunt Mr. Tom Houghton File

, -w, 3- m y --

v,-