ML17252A863

Letter Regarding a 05/18/1973 Occurrence Where a Pressure Transient to About 575 PSIG Was Experienced Due to Closure of Certain Air Operated Valves Associated with the Charging and Letdown System Upon Loss of Control Air - Indian Point Unit

ML17252A863
Person / Time
Site:	Indian Point
Issue date:	05/21/1973
From:	Caldwell W Con Edison, Consolidated Edison Co of New York
To:	O'Reilly J US Atomic Energy Commission (AEC)
References
Download: ML17252A863 (1)

Text

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. __ N15_B574(~2~T)(1:058561A1:+1)PD 05/21/73 22;4 l r<i-...

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O 12'>7 FR DC NEWYORK NY 344 05-21 "74~ EDT..

PMS JAMES P OREILLY DIRECTOR R£:JULATORY OPERATIONS REGION I

US ATOMIC ElllERGY COMM 970 BORAD ST NE WARK NJ 0710 2 DEAR fllR ORE Ill Y -

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I"! ACCORDANCE WI TH THE REQUIREMENTS OF TECHNl:CAL SPEC!tICATION

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>"- ?t 6.6.18 FOR FACILITY OPERATING LICENSE NO DPR--26* WE WISH TO I"'lFORM YOU OF AN ABNORMAL OCCURRENCE WHICH WAS IDENTIFIED ON MAY 18, 1973 AT 0552 HOURS-IN THE" COURSE or HEATING UP THE REACTOR COOLANT SYSTEM PREPARATORY' TO THE CONDUCT. or A HYDROSTATIC TEST,.

A PRESSURE TRANSIENT: TO ABOUT 575 PSIG llF't2111: (115Gl:.

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WAS:

EXPERIENCED OU TO CLOSURE OF CERTAir~ AIR OPERATED

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VALVES ASSOCIATED WITH THE CHARGING ANO LETDOWN SYSTEM UPON LOSS or:-.

CONTROL AIR*

OUR. PREl:.IMlNARY INVESTIGATION INDICATES THT THE LOSS or* CON TROL. AIR. WAS THE RESULT OF A FREEZE UP OF THE A:IR. SUPPLY -

LINF Ar T.HE REFRIGERANT OYRER.

AT THE TIME OF THE TRANSIENT, THE REACTOR COOLANT SYSTEM WAS A APPROXIMATELY 440 PSIG *

. MIO: 1~0 DEGREES F WITH FOUR REACTOR COOLANT PUMPS IN SERVICE:.. ANO.**.*

ALL CONTROL ROOS rnLLY INSERTED.

• THERE. WAS NO DAMAGE TO Am SYSTEM: OR COMl?Ol\\ENT NOR WAS THERE:

ANY. REASON TO EXPECT ANY AS A RESULT Of THE'. PRESSURE... * :*

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. TRANSIENT.MR. A. FASANO OF' YOUR. OffICE WAS INFORMED OF' THE OCCURRENCE~:* :

B.Y MR_ JOHN MAKEPEACE av* l'E:LEPHONE' ONMAY18 1973.

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[N ACCORDANCE WITH THE REQUIREMENTS OF TECHNlCAL SPEClrICATlON o

• 2: NO'.fIF.TCATlON OF THE VICE. CHAIRMAN OF THE NUCLEAR F'ACIUTIES SAFETY. COMMITTEE HAS BEEN MADE.*....

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. 1 WF ARE CURRElllrl'LY Ir.JVES'TIGATING THE CAUSE Of THE:.'/* * <. '* *

-o:ccuRRENCE AND VI LL ADVISE YOU or* QlJR_ F'lNDlNGS.

• AND. CORRECTIVE ACTION TAKEN IN. A WRITTTEN. REPORT WlilCH. VlLLBE SU Bf'II.TTEO VlTHlN THE:* REUIRED TEN. ( 10.) -DAYS YOURS' TRULY.

. WlLllAM: E CALOWELL SF-i20i 1115'-69:

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