05000282/LER-1980-010-03, /03L-0:on 800311,during Surveillance Test, Containment Isolation Valve 11 Opened at 0.57 Psi.Caused by Apparent Drift in Barton Model 288A Differential Pressure Switch.Setpoint Adjusted & Valve Retested Satisfactorily

/03L-0:on 800311,during Surveillance Test, Containment Isolation Valve 11 Opened at 0.57 Psi.Caused by Apparent Drift in Barton Model 288A Differential Pressure Switch.Setpoint Adjusted & Valve Retested Satisfactorily

ML19305D840
Person / Time
Site:	Prairie Island
Issue date:	04/10/1980
From:	Hunstad A NORTHERN STATES POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML19305D837	List: 05000282/LER-1980-010-03, /03L-0:on 800311,during Surveillance Test, Containment Isolation Valve 11 Opened at 0.57 Psi.Caused by Apparent Drift in Barton Model 288A Differential Pressure Switch.Setpoint Adjusted & Valve Retested Satisfactorily
References
LER-80-010-03L, LER-80-10-3L, NUDOCS 8004150603
Download: ML19305D840 (1)

LER-1980-010, /03L-0:on 800311,during Surveillance Test, Containment Isolation Valve 11 Opened at 0.57 Psi.Caused by Apparent Drift in Barton Model 288A Differential Pressure Switch.Setpoint Adjusted & Valve Retested Satisfactorily

Event date:
Report date:
2821980010R03 - NRC Website

text

NRC FOn84 385 U. E. NUCLEAR REG!LATORY COMMISSION (7 77)

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8 60 81 DOCKET NUM8ER 88 89 EVENT DATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h O 2 lDuring surveillance test, No. 11 containment vacuum breaker isolation valve opened l O 3 lat 0.57 psi, this is outside the limit of 0.5 psi set in Tech Spec 4.4.C.

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