ML17037C338

Twx Requesting Temporary Relief from a Requirement of Technical Specifications to Allow Heating of Component Parts of the Reactor Turbine

ML17037C338
Person / Time
Site:	Nine Mile Point
Issue date:	10/22/1969
From:	Burt P Niagara Mohawk Power Corp
To:	Morris P US Atomic Energy Commission (AEC)
References
Download: ML17037C338 (4)

Text

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U S GOVERNMENT ATOMIC ENERGY COMM HDQTRS gl N M 9MILE OSQ X7 10" 547-0657 10-22" 69 9%30 A 'M EDT ATTENTIONX DR PETER A MORRIS'IRECTOR DIVISION OF REACTOR LICENSING BETHESDA~ MARYLAND GENTLEMEN%

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REFERENCE% DOCKET NO 50-220 eleg ~f P oo ~ L o XDPR k7 TO ASSURE THAT COMPONENT PARTS OF THE NINE MILE POINT TURBINE EXPAND FREELY AND WITHOUT INTERFERENCE OF ROTATING PARTS IT IS ESSENTIAL FOR SAFE OPERATION THAT THESE PARTS BE HEATED TO APPROACH LOADED CONDITIONS WHILE STILL AT LOW SPEED AND NOT CONNECTED TO THE .SYSTEM.

"STRETCH"OUT" TESTS ARE PERFORMED ONCE IN THE LIFETIME OF A TURBINE.

REDUCTION OF CONDENSER VACUUM PROVIDES THE MEANS OF .ALLOWING THE HEAT OF THE STEAM TO EXTEND THROUGH TO THE EXHAUST HOODS o DEPLETION OF VACUUM TO 23" HG INITIATES A REACTOR SCRAM ~ TECHNICAL SPECIFICATIONS~ PG 95~ TABLE 3.6.2 A %6i MAKE THIS A REQUIREMENT ~

BY-PASSING OF SENSORS ABOVE 600 PSI RENDERS THEM INOPERABLE AND REQUIRES CONTROL ROD INSERTION %TECH SPECS'G 9p 5 ~ 6.2 Ai ~

OBVIOUSLY WITH THE REACTOR SHUT DOWNp IT IS NOT POSSIBLE TO PROVIDE HEATING STEAM TO -THE TURBINE.

IN CONSIDERATION OF THE CONTROLLED TEST CONDITIONS OF ZERO LOAD AND LOW SPEED WE REQUEST TEMPORARY RELIEF FROM THIS CONDITION BY JUMP-ERING THE SENSORS DURING THE SHORT TIME OF THE TEST. NO CHANGE IN TECHNICAL SPECIFICATIONS IS DESIRED OR REQUESTED' 0)

A BURT DOCKETED USAEG STATION SUPERINTENDENT OCT23 1969~ t N M 9MILE OSW RNNAIOBl'AIL SCAN! pg 00NEf aging END MS

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