ML20151C155

AO 73-33:on 731221,during Surveillance Testing on Isolation Condenser High Flow Sensors,High Flow Setpoints Found to Trip at Delta P Values in Excess of Tech Specs Limits.Cause Unknown.Sensors Reset

ML20151C155
Person / Time
Site:	Oyster Creek
Issue date:	12/21/1973
From:	Sullivan J JERSEY CENTRAL POWER & LIGHT CO.
To:
References
AO-73-33, NUDOCS 8103040728
Download: ML20151C155 (2)

Text

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• i Repon No. 75-33

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SIR.1ECT:

Violation of the Technical Specifications, paragraph 3.1. A.3,

%e high flow setpoints on the ster:: sad condensste lines of the Tsolation.Condensen were fotad to trip at AP values in excess of those as stated in Technical Specification Table 3.1.1.H (<20 psid - stcai,d27.inchos 6F H2O - Condensate).

'Ihis event is considered to be an abnor al occurrenco as de-fined in the Technical Specifications, paragraph 1,153..

1:uti-fication of this ovent; as required by the Technical Specifi-cations, paragraph 6.6.2.a, was n:5dc to AEC Region I, Directorate of Reguistory operations, by telephone on Fridsy, Decer.her 21, 1973, at 1635, and by teleccpier on k'ednesday, December 26, 1973, e

at 0955.

SITU.GIC : On F'iday, Dccerber 21, 1973, whilc performing survoi'11ance

, testing-on tho Isolation Condenser liigh Flow sensors (two each por condensate and Aten line per cond ser), four of the sensors were found to trip.at setpoints in exces'. of their respective l

lir.dts.

Specificelly, the sensors of concern and their corres-

'ponding "as found" setpoints are as follows; l

Condssate "A"ContkenserIE11A1'.29"ofWAter f

l ID]) A2 - 31" of water IB11B2 - 20" of water 5

Stcan l

J1 "S" Cendenser 2005a1 - 22 psid f/0399D729

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Abnomal Occurrenct.

P.cpor't No. 73-33, Decer.ber 21, 1973 caul $

. The cause of this ' event is yet to be dotcr=ined.

p.95pj AL Action:

Upon discovery of the condition, the instrumnt tecnicina per-forming-the surveillance test reset the affected d/p, sensors to their raquired vsIves (5,27 inches H2O on condensate and <20 psid on the stcan).

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SAFEiY SIGNIFJC/JiCTir The safaty irplication of this event is minicAl sincethaesen-i sors were operabIe and would have perfomed their.ftmction.

Fast: data has shDWn that. Upon initinting ~ the c'ondensers, the condensate line senses d/p in excess of 60. inches of water; therefore, althou;;h th'e setpoint had drifted, the new value was well,within the range of the egerted signal and 'the sensor was -

capP.ble of perfoming' its protectivo action.

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Date:

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