ML20084A976

Telecopy Ro:On 720727,during Reactor Startup RCIC Inboard Steam Supply Valve 1301-16 Failed in Open Position. Capability to Isolate on RCIC Line Break Signal Degraded

ML20084A976
Person / Time
Site:	Quad Cities
Issue date:	07/28/1972
From:	Stephenson B COMMONWEALTH EDISON CO.
To:	Jorden E NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20084A946	List: ML20084A945 ML20084A976
References
NUDOCS 8304060049
Download: ML20084A976 (1)

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REFEREtJCE QU AD CITIES NUCLEAR POWER STATION DPR-30 A ENDIL A l SECTIONS 1.0.A.2 AND 5.6.A.3 -

l DURIN A REACTOR STARTUP ON QUAD CITIES UNIT TWO THE REACTOR CORE ISOLATION COOLING SYSTEM INBOARD STEAM SUPPLY VALVE 1301-15 FiILED IN THE OPEN POSITION AND COULD NOT BE CLOSED

! FROM THE CONTROL ROOM FOR A TEST. THE MALFUNCTION OCCURRED AT h APM ON JULY 27 3 1972 WITH THE REACTOR IN THE STARTUP MODE AT

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i g 230 PSI. THE SYSTEM WAS CAPABLE OF PERFORMING ITS INTENDED 2 1150

{ 6 SAFETY FUNCTION BUT THE CAPABILITY TO ISOLATE ON AN RCIC LINL \

8 "IET* SICf1AL WAS DEGRADED. THE OUTBOARD ISOLATION VALVE WAS 4

l CLOSED AND THE REACTOR WAS SHUT DOWN TO DEPRESSURIZE BELOW i 150 PSI B B STEPHENSON QUAD CITIES NUCLEAR POUER STATION 1 CORDOVA ILL I

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