05000247/LER-1981-012-01, /01T-0:on 810511,3/4-inch Swagelok Union in Remote Reactor Head Vent Line Parted During Test to Assure Operability of Low Power Injection/Rhr Check Valves Prior to Restart.Caused by Improper Installation.Valve Closed

/01T-0:on 810511,3/4-inch Swagelok Union in Remote Reactor Head Vent Line Parted During Test to Assure Operability of Low Power Injection/Rhr Check Valves Prior to Restart.Caused by Improper Installation.Valve Closed

ML20004E188
Person / Time
Site:	Indian Point
Issue date:	05/22/1981
From:	CONSOLIDATED EDISON CO. OF NEW YORK, INC.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20004E184	List: 05000247/LER-1981-012, Forwards LER 81-012/01T-0 05000247/LER-1981-012-01, /01T-0:on 810511,3/4-inch Swagelok Union in Remote Reactor Head Vent Line Parted During Test to Assure Operability of Low Power Injection/Rhr Check Valves Prior to Restart.Caused by Improper Installation.Valve Closed
References
LER-81-012-01T, LER-81-12-1T, NUDOCS 8106110316
Download: ML20004E188 (2)

LER-1981-012, /01T-0:on 810511,3/4-inch Swagelok Union in Remote Reactor Head Vent Line Parted During Test to Assure Operability of Low Power Injection/Rhr Check Valves Prior to Restart.Caused by Improper Installation.Valve Closed

Event date:
Report date:
2471981012R01 - NRC Website

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LER 8'l-012/036-0 Indian Point Unit No. 2 While conducting a test to assure operability of the LPI/RIIR, check valves prior to plant restart, a 3/4 inch "Swagelok" union in the remote reactor head vent line parted.

At the time of this event, the reactor coolant system temperature and

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pressure were approximately 3200F and 1200 psig respectively.

Since "Swagelok" fittings in the remote reactor vent line were rated for at least 3000 psi, it is assumed that faulty instal-lation caused se union to fail.

An operator who was in con-tainment at et ; time promptly closed the isolation valve.

A "Swagelok" plug was installed downstream of the head vent line isolation valve.

Until the remote vent system is connected permanently to the reactor head vent line, the isolation valve will be kept closed to maintain a double barrier.

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