ML20084S578

RO 50-254/76-24:on 760727,reactor Bldg to Suppression Chamber Vacuum Breaker Pressure Switch PS-1-1622B Tripped at 0.536 Psid.Caused by Instrument Setpoint Drift.Switch Recalibr

ML20084S578
Person / Time
Site:	Quad Cities
Issue date:	08/26/1976
From:	Donna Anderson, Kalivianakis N COMMONWEALTH EDISON CO.
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
3LSFYY, NJK-76-296, RO-50-254-76-24, NUDOCS 8306170117
Download: ML20084S578 (2)

Text

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- V -. l Co zith Edis n Ouad-Cities Nuclear Power Station )

Post Office Box 216 i Cordova, Illinois 61242 Telephone 309/654-2241 l l

NJ K-76-296 DlLE COPY August 26, 1976 J. Keppler, Regional Director Office of Inspection and Enforcement Region ill U. S. Nuclear Regulatory Commission 799 Rossevelt Road Glen Ellyn, Illinois 60137

Reference:

Quad-Cities Nuclear Power Station Docket No. 50-254, DPR-29, Unit 1 Appendix A, Sections 3.7.A.3.a. &

6.6.B.2.a Enclosed please find Reportable Occurrence Report No. 50-254/76-24 for quad-Cities Nuclear Power Station. ,

This report is submitted to you in accordance with the requirements of Technical Specification 6.6.B.2.

Very truly yours, COMMONWEALTH EDISON COMPANY QUAD-CITIES NUCLEA.R, POWER STATION

//

- /. ~ / ~ ./

,A ,0 l flidh N. J. Kalivianakis Station Superintendent l

NJK/DRA/tav 1'

cc: G. A. Abrell .

PUFY bLN11GG10N 'I m l

0 S ,

1 AUG 2 71976

(. .- - -- _ . _ _ . . --_ _

$NSEE EVENT REPORT g ,

CONTROL BLOCK:l l l l l l l (pLEASE PRINT ALL REQUIRED INFORMATION)

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1 6

• AME LCENSE NUMBER PE TYPE 01 li lt IQl Al DI1l l 0l0 l-l0 l 0 l 0 l 0 l 0l-l0 l0 l l4l1 l1l1l1l l 0l 3l 7 89 14 15 25 26 30 31 32 CATECORY T U OCCKET NUMBER EVENT CATE REPORT CATE D 1 CONT l l l lL l l0 l5 l0 l-l 0 l 2 l 5 l 4 [ lo l7 l2 l7 l7 l 61 l0 l8 l2 l6 l716 l 7 8 57 58 59 60 61 68 69 74 75 80 EVENT DESCRIPTION HE lOn July 27. 1976, while performing quarterly surveillance on the Reactor Building l 7 89 60 EE I to suppression chamber vacuum breaker pressure switches. pressure switch PS-1-16228 l 7 89 80 EE l tripped at 0.536 psid which exceeded the Technical Specification limit of 0.5 psid. l l 7 89 80 32 l Safety implications were minimal since the PS-1-1622A switch was within the limits. l 7 89 l

gg l The switch was recalibrated and functionally tested safisfactorily (R0 50-254/76-24) 80; ,

7 89 pwE 80 C OE CCCE COMPONENT COCE SUPPUER R VOLATON 35 l S lH l W l 1 l N l S lT l R l U l lAl l S l 3 l 8l 2l lN l 7 89 10 11 12 17 43 44 47 48 CAUSE OESCRIPTION

( SE l The designated cause of this occurrence is instrument setpoint drift. Corrective l 7 89 80 SE l action is deemed adequate to prevent recurrence. Switch is a static "0" ring, Model l 7 89 80 DE l number 12R2KK815-V, range + 20 psi . _

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STA S  % POWER OTHER STATUS OrSCOVERY OISCOVERY OESCRIPTON 1 y l0l0]12 13l NA l ]45 l NA l 7 8 9 10 44 48 80 ACTMTY CONTENT MELEASED AMOUNT OF ACTMTY LOCATON OF RELEASE

@l 7 8 9 lZ l OF JRELEASE l NA 10 11 l

44 45 l NA 80 l

PERSONNEL EXPOSURES NUMBER TYPE CESCRIPTON DE l lN l Al y l NA l 7 89 11 12 13 80 PERSONNEL INJURIES NUMBER OESCRIPTON

(( l lN l Al l NA l 7 89 11 12 80 OFFSITE CONSEQUENCES NA 32 l l 7 89 80 LOSS OR DAMAGE TO FACIUTY TYPE DESCRIPTON 3E y l NA l 7 89 10

• 80 PUBLICITY lm l NA l

l 7 89 80 l ADDITIONAL FACTORS DE I I 7 89 80 l

l DE I l NAME:

nald R. Anderson PHONE:

GPO 889 64T