ML20084U364

AO 50-265/75-7:on 750208,during Surveillance Test,Hpci Steam Line Flow Switch FS-2-2352 Failed to Trip at Applied Differential Pressure.Caused by Binding Switch Linkage. Linkage Adjusted & Switch Recalibr

ML20084U364
Person / Time
Site:	Quad Cities, Bodega Bay
Issue date:	02/18/1975
From:	Kalivianakis N COMMONWEALTH EDISON CO.
To:	Oleary J Office of Nuclear Reactor Regulation
Shared Package
ML20084U366	List: ML20084U364 ML20084U404
References
AO-50-265-75-7, NJK-75-73, NUDOCS 8306280646
Download: ML20084U364 (3)

Text

~

Commonwe:lth Edison

[] Cuad ) Cit (~7uclear Power Station Post 0:Sc( jx 216 Cordo <a. imriois 61242 .

Tetcpnone 309/654-2241

-l-,, '

<y. &' % '

NJK-75-73 i 4 ap ,, INj u Feb ruary 18, 1975 #'

q, 4 };k*

' d,#6 ,t

&V Hr. John F. O' Leary, Director Directorate of Licensing Regulation U. S. Atomic Energy Commission Washington, D. C. 20545 RE FERENCE : Quad-Cities Nuclear Power Station Docket No. 50-265, DPR-30 Appendix A, Sections 1.0.A.2, 3.2.A, Table 3 2.1, 6.6.B.I.a

Dear Mr. O' Leary:

Enclosed please find Abnormal Occurrence Report No. 50-265/75-7 for Quad-Ci ties Nuclear Power Station. This occurrence was previously reported to Region 111, Directorate of Regulatory Operations by tele-phone on February 10, 1975 and to you and Region lIl, Di rectorate of Regulatory Operations by telecopy on February ll,1975 This report is submitted to you in accordance with the requirements of Techni cal Speci fication 6.6.B. I.a.

Very truly yours, COMMONWEALTH EDISON COMPANY QUAD-CITIES NUCLEAR POWER STAT 10N ff N. J. Kalivianakis Wh Station Superintendent NJK/RAR/lk cc: Region lli, Directorate of Regulatory Operations '

J. S. Abel 83 % k fo 00 2W0 S

_ _ - _ _ _ _ _ _ _ ---_--.--- - > _ Ub

s

• 4

?

,0*

• L ,

REPORT. -

% w-- NOM_--3ER: A0 50-265/75-7

_ v \

/ - < .

.1

• kEPORTDATE:F b'rcary 18, 1975 ,,,

i '

OCCURRENCE DATE: Feb rua ry_8, 1975_

. ~ , , .

) . ,,  ? FACILITY: -

7 ,

'~ . .

- l quad-Cities Nuclear Tower Station ~

l

'Cordova, illinois 61242- .._

l

~

1 . .

~

. IDENTIFICATION OF OCCURRENCE:

High Pressure Coolant I.ajection (HPCI) steam line floa switch, FS-2-2352, r failed to cause an isolation of the system wiihin Technical Specification limit.

6*

CONDITIONS PRIOR TO OCCURRENCE:

The unit was'in the cold shutdown condition fer a refueling outage.

_. ~~.

<~- -

, DESCRIPTION OF OCCURRENCE:. <

On February ,8,19'15,T.tfie doing' routine surveillance testing of the High Press 6re Coolant injection System (HPCI) steat., line flow switches, FS-2-23{2, fiiled to irip-ac a6y applied dif ferential pressure. The purpose of'this swi tch is to isolate the HPCI system when the steam flow I'st 300% of the 'rateu flow.". e

, DESIGNATION OF APPARENT CAUSE 0F 6fCURRENCE:

Misalignment The failure was investigated and it was discoveree! that the switch

-j linkage was binding and would not move through Its full travel.

.b ANALYSIS.0FOCCURRENCb -

There are tw6diPCI steam line flow sGlitches; FS-2-2352 and FS-2-2353 ,

['-

• Each one Is capable of' Isolating th,C HPCI system; therefore, even though 4 .

FS-2-2352 "fai led, FS-2-2353, which was found within limits, would have

, isolated the HPCI system before the Technical Specification Limiting

, Condition for Operat on was exceeded. ,

\ w g ;#l ip ** .

f'

..:. . ' +

I ^

~< ./

,w . ~ . - - - . . , . . . ....-~,. ---.- --.

, /'

. . ,.. m .. - -.

d'

• A0 50-265/75-7 Februa ry 18, 1975 t

Due to the redundancy of the circuitry, safe HPCI and thus safe reactor operation were not Jeopardized. No hazard to the health of the public or plant personnel was presented.

l

! CORRECTIVE ACTION:

! The linkage was adjusted and the switch was recalibrated and functionally l

tested to verify its operability.

1 a .

[ FAILURE DATA:

Equipment Piece Number 2-2352 Manufacturer Barton d

Model 288

! Range -200" to +200" of water This is the first HPCI switch which has failed by the linkage binding at Quad-cities Station; therefore, there are no safety implications based on cumulative experience.

l l

l l

?

n