ML19329B096

Final Deficiency Rept Re Use of Seismically Unqualified GE Type Hfa Relay.Relays Retested & Found Qualified

ML19329B096
Person / Time
Site:	Davis Besse
Issue date:	10/27/1976
From:	Roe L TOLEDO EDISON CO.
To:
Shared Package
ML19329B081	List: ML19329B083 ML19329B089 ML19329B094 ML19329B095 ML19329B096 ML19329B097
References
138, NUDOCS 8001300682
Download: ML19329B096 (2)

Text

-

)

g,-

.'~. . . .

'v)

(

C M. i MFP.fL.r.my 3b:litabMib .

LOWELL E. ROE mee ewas

. r=.we. o,.eu.m m October 27, 1976 .

maa rsse: -

serial No.: 138 Docket No.: 50-346 . <

. c Mr. James G. Keppler -

I Regional Director, Region III ,

~

.Directorato of Regulatory Operations U.S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, Illinois 60137 m

Dear Mr. Koppler:

This letter is submitted as a final report in accordance tritli 10 'CFR

• Part 50.55(c) rcgarding the deficiency involving the Ucstinghouse Medium Voltacc, type Dil-P 4,16 KV suitchscar, used on busses C1 and D1, at Davia-Besso Nuclear Power Station Unit No. 1. This was discussed by Mr.

C..R. Domeck, Nuclear Project Engineer, with Mr. T. Vandcl, NRC Region III Office of Inspection and Enforcement, on September 24, 1976, and was

. reported 'as a deficiency. ,

Description _ of the Deficiency . .

In response to an iuquiry regarding the scismic capability of the appurte- I nances to the subject suitchgear, a Ucstinghouse sales engineer responded l to our agent, Dccht.cl Company, that the Cencral Electric Type HFA relay )

was not scismically qualified Class IE.

Corrective Action

• A joint meeting with'Ucstinghouse, Dechtcl, and Toledo Edison at Pittsburgh revealed that. Ucstinghouse had scismically tested a prototype switchucar assembly, and made an analysis of the appurtenances to qualify the l Davis -Besse suitchgear and the components to Class IE, per our specifica-l tionc. The scismic qualification reports were submitted as required by 1

( the specification. The basis for the scisinic qualification was an

(,,,/ analysis of the scucric test, which included relays specifically chosen g o o130 0

- a suum e euvier- -

F *

s. .

2

' ~

to represent the various available types of movements, and were performed at severe seismic icycls well above those for Davis-Hesse. The Type llFA rhlays were not, however, included in the prototype test. Recent infor-

- nation received from the poneral Electric Company has confirmed the seismic qualification of the Type !:FA rela'yc for this application.

Safety Implications .

Since no actual equipment deficiency existed, the health and safety of

, the public were not jeopardized. .

Yours very truly, l3 ,.#.'g s c:-ebiu

- /

db c/23-24 cc:

Dr. Ernst Volgenau, Director Office of Inspection & Enforcement N U.S. Nucicar Regulatory Cor:nission

• Washington, DC 20555 e

4 e

. o O

9 e

4 e

O