ML19331C573

Part 21 Rept Re Possibility That Bailey Current or Voltage Buffer Cards Could Be Installed Improperly in Essential Control Instrumentation.Visual Insp Can Be Conducted to Insure Proper Installation

ML19331C573
Person / Time
Site:	North Anna
Issue date:	08/06/1980
From:	Brown S VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:
References
REF-PT21-80-257-002 NUDOCS 8008190059
Download: ML19331C573 (4)

Text

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PRELIMINAR'.' EVALUATION OF THE ATTACHED REPORT IfGICATES LEAD RESPONSIBILITY FOR FOLLONJP AS SH3WN BELOW:

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RF VIRGINI A ELECTRIC AND PC'*ER COUP ANY, Rf CMMOND, VIRGINi A 23261 August 6, 1980 ,

g Mr. James P. O'Reilly, Director Serial fio. 69.

Office of Inspection & Enforcement PSE&C/AES:bmt~

U. S. fluclear Regulatory Comrnission Region II Docket tios. 50-404 101 Marietta Street, Suite 3100 '50-405 Atlanta, Georgia 30303

Dear Mr. O'Reilly:

On August 1,1980 a report was made under the provisions of 10CFR50.55(e) concerning the possibility that the Bailey Control Company current or voltage buffer cards, PfiS624610, could be installed improperly in the 820 buffer modules in the power channels of the Essential Control Instrumentation (ECI) Systems.

In accordance with the reporting requirements of 10CFR21, the folicwing information is submitted:

A. fiame and address of reporting individual:

Mr. E. A. Baum, Executive Manager Licensing and Quality Assurance l Virginia Electric and Power Company '

P. O. Box 26666 Richmond, Virginia 23261 B Facility, activity and/or component affected:

fiorth Anna Power Station, Units 3 & 4 Bailey Control Company 820 buffer modules with PliS624610 buffer cards used in the Essential Control Instrumentation Systems.

C. f?ame of firm constructing the facility or supplying the component, activity or service:

Babcock & Wilcox Company P. O. Box 1260 Lynchburg, Virginia 24505 D. Dascription of defect, deficiency, or failure to comply:

It has been determined by the. Babcock & Wilcox Company that it is possible to interpret a statement in the Bailey Control Company product Instruction Book E92-79 for inputting buffer cards for the ECI Systems to mean that these cards may be replaced without remov-

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ing the buffer module. In doing so, it is possible, during  ;

field changes, to improperly install at least one card in each '

of the power channels resulting in a potential loss of power to both channels. By removing the buffer module prior to ,

installation of the card, a visual inspection can be conducted to insure that the card has been installed properly.

E. Date of determination of reportability:

August 1, 1980 F. Similar comporents, activities, or services:

None G. Corrective action which has been, is being or will be taken, the individual responsible and the length of time to complete the action:

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Babcock 8 Wilcox reported this problem to Victor Stello, Director, Office of Inspection and Enforcement, United States Nuclear Regulatory Commissicn, via a letter dated July 18, 1980. In this letter, Babcock '

& Wilcox recommended rewording the maintenance instructions in the Bailey Centrol Company product Instruction Book E92-79 to require removal of- the buffer modules prior to installation of the beffer cards so as to insure proper installation of the cards. The reworded in-struction book would be provided to VEPCO as soon as it is available.

VEPC0 is currently evaluating the Babcock & Wilcox recommendations

and we will consider this to be the final report on this subject unless 4 it is decided to implement corrective actions above and beyond those recommended by Babcock & Wilcox.

H. Other information:

. ~

i None

If no other actions are required to correct the problem described in Section D

_ of this report, we will consider this to be the final report under the provisions of 10CFR50.55(e).

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(a. Cs Browir' O . a[u Seni r Vice President Power Station Engineering (

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and Construction

/c: Director, Office of Inspection .

and Enforcement (3)

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