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

,..y.-*'.'f/ 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 IllY-I"! ACCORDANCE WI TH THE REQUIREMENTS OF TECHNl:CAL SPEC!tICATION i  ; ',

6 .6.18 FOR FACILITY OPERATING LICENSE NO

~,. " DPR--26* WE WISH TO I"'lFORM YOU OF AN ABNORMAL OCCURRENCE WHICH WAS

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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 t

TEST,. A PRESSURE TRANSIENT: TO ABOUT 575 PSIG

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WAS: EXPERIENCED OU TO CLOSURE OF CERTAir~ AIR OPERATED 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 . _; .. . .L . I r .. .

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.. .. ..--:., .. ~--- 1 THERE: ANY. REASON TO EXPECT ANY AS A RESULT Of THE'. PRESSURE ... * :* :-, -* .* /.:.  :!

. 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.*....

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

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

• AND. CORRECTIVE ACTION TAKEN IN. A WRITTTEN. REPORT *r -...,.,_

• . IC' 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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