05000249/LER-1980-005-01, /01T-0:on 800213,while in S/D Mode,Msiv Scram Limit Switches Were Checked & of 16 Limit Switches,Two Found to Have Setpoints Greater than 10%.Caused by Switch Out of Calibr.Limit Switches Readjusted

/01T-0:on 800213,while in S/D Mode,Msiv Scram Limit Switches Were Checked & of 16 Limit Switches,Two Found to Have Setpoints Greater than 10%.Caused by Switch Out of Calibr.Limit Switches Readjusted

ML19296D403
Person / Time
Site:	Dresden
Issue date:	02/25/1980
From:	Kovchynsky M COMMONWEALTH EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML17192A534	List: 05000249/LER-1980-005, Forwards LER 80-005/01T-0 05000249/LER-1980-005-01, /01T-0:on 800213,while in S/D Mode,Msiv Scram Limit Switches Were Checked & of 16 Limit Switches,Two Found to Have Setpoints Greater than 10%.Caused by Switch Out of Calibr.Limit Switches Readjusted
References
LER-80-005-01T, LER-80-5-1T, NUDOCS 8003040539
Download: ML19296D403 (1)

LER-1980-005, /01T-0:on 800213,while in S/D Mode,Msiv Scram Limit Switches Were Checked & of 16 Limit Switches,Two Found to Have Setpoints Greater than 10%.Caused by Switch Out of Calibr.Limit Switches Readjusted

Event date:
Report date:
2491980005R01 - NRC Website

text

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UCENSEE EVENT REPORT CONTROL 8 LOCK: l l

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60 6l OCCKET %MBER od 63 EN ENT CATE 74 75 PEPOR T O ATE 10 EVENT DESCRIPTION AND PACSABLE CONSECUENCES h a1: l*4hile in the S/D mode of ooeration the MSIV scram limit switches were checked. Of I

l the 16 limit switches 2 were found to have setooints > 10%.

This event was of mini =al I

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o 64 Isafety significance since the MSIV's with limit switch setpoints > 10*. also had a re-I o,5 ldundant MSIV in the same line with limit switch setpoints of ( 10% as required by Tech.l c is l Spec. Table 3.1.1.

This type of event has occurred before at Dresden.

(See R0479-57/ l oi7 lOlT-0, Docket 1050-237).

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The limit switches were readjusted and demonstrated operable.- l l No further action is necessar. '

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