ML20044B024

From kanterella
Jump to navigation Jump to search
Responds to Violations Noted in Insp Rept 50-395/90-15. Corrective Actions:Relay Rewired & Verified Against Design Drawings
ML20044B024
Person / Time
Site: Summer South Carolina Electric & Gas Company icon.png
Issue date: 07/11/1990
From: Bradham O
SOUTH CAROLINA ELECTRIC & GAS CO.
To:
NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
NUDOCS 9007170221
Download: ML20044B024 (2)


Text

_ _ _ _ . . . . . . .

?-$..

a jt t

- So th rotina Electric & Gas Comp:ny le S. r dhim c-

[-. ' -

, Jenkinsville. So 2906$ Nuclear Operations '

.. (80t 345 4040

'4 ggg..

-o w a.,.

July'11, 1990~

Document' Control Desk U. S. Nuclear Regulatory Commission Washington, DC 20555

Subject:

Virgil C.-' Summer Nuclear Station-Docket No. 50/395 Operating License No. NPF-12

. Response to Notice of Violation NRC Inspection Report 90-15 Gentlemen:

Attached is the South Carolina Electric & Gas Company'(SCE&G) response to the violation addressed in Enclosure 1 of HRC Inspection Report 50-395/90-06..

- SCE&G is in agreement with the alleged violation, and the enclosed-response addresses the reason for the violation and the corrective actions being taken to prevent recurrence.

" 'u should;have any questions, please advise.

Vtry truly yours,

( .

0. ;. Bradham DCH/0SB:1y Attachment c: 0. W. Dixon, Jr./T. C. Nichols, Jr.

~E. C. Roberts R. V. Tanner J. C. Snelson S. D. Ebneter NRC Resident Inspector J. J. Hayes, Jr. J. B.'Knotts, Jr.

3. General Managers NPCF C..A. Price NSRC R. B. Clary RTS (IE 900015)

K. E. Nodland File (815.01) 9007170221 900711

{DR. ADOCK 05000395 l PDC

.- 9

pc. . 1

{ 1,e ..

~ .i  ; Attachment 1' to' Document Control Desk Letter i, ' July 11. 1990

,Pages1 of 1 l ,

7, ,

RESPONSE TO NOTICE OF VIOLATION p VIOLATION NUMBER 50-395/90-15-01 1

f' '!

o 1. ADMISSION OR DENIAL OF THE VIOLATION i

South Carolina Electric & Gas Company (SCE&G)-is in agreement with the l

, alleged violation.

6 9

" ', 11. REASON FOR THE VIOLATION  !

L 'An investigation.showed that the undervoltage Agastat relay had been  ;

h, replaced on April 27, 1990, under an equipment qualification program. i Upon inspection, it was discovered that the undervoltage circuit Agastat L relay should have been installed in the "normally open" configuration, L but was incorrectly" installed in the "normally closed" configuration.- 3 The-electrical maintenance personnel that replaced the relay made an error = recording the "as found" positions of the relay terminations.- 0 This' led to.the new relay being installed incorrectly even though an i independent verification and a Quality Control inspection'was performed J on the-"as found" and "as left" terminations._ The procedural guidance governing:the maintenance is clear and'should have prevented the error ^

.from occurring.

i III,_ CORRECTIVE STEPS TAKEN AND NESULTS  !

h The' relay was rewired and verified against the' design drawing.-

Subsequent safeguard actuation testing. proved proper installation and -

actuation of the relay.

IV. CORRECTIVE ACTIONS WHICH WILL BE-TAKEN TO AV( Q FURTHER VIOLATIONS  ;

The personnel. involved were counseled.on proper verification methods.

Electrical Maintenance Procedure (EMP-300.012), "Agastat Relay Replacement," will be changed to enhance the "as found" data collection and.will require verification of the "as left"' data by comparison to the design drawings.

A retest procedure is being considered that, if practical, will test the Agastat Relay without processing an ESF actuation signal.

\

\,

V. DATE OF FULL COMPLIANCE EMP-300.012. "Agastat Relay Replacement," will be revised by September 30, 1990.