ML20084E709

Telecopy Ao:On 700706,boron Dilution Performed W/Reactor Critical & No Reactor Coolant Pump or RHR Pump in Operation

ML20084E709
Person / Time
Site:	Ginna
Issue date:	07/06/1970
From:	Platt C ROCHESTER GAS & ELECTRIC CORP.
To:	Kirkman R US ATOMIC ENERGY COMMISSION (AEC)
Shared Package
ML20084E539	List: ML20084E536 ML20084E550 ML20084E709
References
NUDOCS 8304150316
Download: ML20084E709 (3)

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We fil Union s 249P EDT JUL 6 70 PC388 SYA225 SY RHB173 HG PDF ROCHESTER NY 6 230P EDT R W KIRKMAN DIRECTOR REGION ONE DIVISION OF COMPLI ANCE USAEC l 970 BROAD ST NEW ARK NJERR THIS IS TO CONFIRM MY CONVERSATION OF 1318 THIS DATE WITH D0YLE HUNNICUTT IN REGARDS TO ABNORMAL OCCURENCE THAT HAPPENED AT 0220 ON JULY 6 5970 .AT GINNA STATION DURING THE 1600 TO 2400 TRICK ON JULY FIFTH 1970 A STEAM LEAK WAS DISCOVERED IN A GAUGE LINE ON THE HIGH PRESSURE TURBINE IT WAS DETERMINED THAT THE TURBINE GENERATOR WOULD HAVE TO BE TAKEN OFF THE LINE TO MAKE REPAIRS OVER THE PAST WEEK THE LEAK 0FF PAST THE PACKING l ON A PRESSURI2ER SPRAY VALVE HAD INCREASED AND IT WAS DICIDED TO WORK ON THIS VALVE WHILE THE TURBINE GENERATOR WAS OFF THE LINE TO WORK ON THIS VALVE IT IS NECESSARY TO HAVE BOTH i R EACTOR COLLANT PUMPS OUT THE TURBINES WAS TRIPPED OFF THE l 5.1201 LRS89)

LINE AT 2315 ONE REACTOR COOLANT PUMP WAS TAKEN OUT AT 2355 AND THE OTHER REACTOR COLLANT PUMP WAS TAKEN OUT AT 0015 ON j JULY 6 1970. THE HEAD CONTROL OPERATOR WAS MONITORING THE l

{ INTERMEDI ATE RANGE NUCLEAR CHANNEL TO MAINTAIN BASELINE BOWER l AT APPROXIMATILY TEN TO THE MINUS SEVEt: AMPS WITH ALL CONTROL  !

RODS OUT AND THE D BANK AT 150 STEPS MAINTAINANCE WORK BEGAN J$ A ND THE SHIFT FOREMAN WAS BUSY FOLLOWING THE MAINTAINANCE OF THE CONTROL ROOM AS XENON BEGAN TO BUILD l

[ WORK OUTSIDE RS IN THE HEAD CONTROL OPER ATOR ADDED REACTOR MAKEUP WATER TO C

THE PRIMARY SYSTEM TO Malt:TAIN A CONSTANT POWER LEVEL AT 0220 f l 88 THE SHIFT FOREMAN RETURNED TO THE CONTROL ROOM AND FOUND THAT '

THE DILUTIONS WERE IN VIOLATION OF THE LIMITING CONDITIONS 88 0F OPERATION 3.1.1.1A 0F OUR TECHNICAL SPECIFICATIONS. HE l ORDERED THE 1 A REACTOR COOLANT PUMP BACK IN SERVICE AT 0222 f

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l DURING THE TIME THAT BOTH REACTOR COOLANT PUMP WERE OUT OF

! SERVICE THE INCORE THERMO COUPLES AND THE INTERMEDIATE RANGE _

NUCLEAR INSTRUMENTATION WERE MINITORED WHEN THE REACTOR COOLANT PUMPWAS STARTED THERE WERE NO SPIKES OBSERVED INDICATING THAT I

THE NATURAL CIRCULATION DID MIX THE REACTOR MAKEUP ORDER EVENLY WITH THE PRIMARY SYSTEM COOLANT MAINTAINANCE WORK VAS COMPLETED

! B REACTOR COOLANT PUMP STARTED AND THE CENERATOR PUT ON ,

THE LINI WITH OUT FURTHER INCIDENTS CHARLES E PLATT SUPERINTENDENT l GINNA STATION ROCHESTER GAS AND ELECTRIC CORP .

I 1318 0223 6 1970 1600 2400 1970 2315 2355 0015 6 1970 P0 POWER TEN TO THE MINUS D BANK 150 STEPS XENON 0220 3.1.1.1A 1A 0222 B _

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, . MEMO ROUTE SLIP . _

For sfgaeture. For information, f Idrm AEC-93 (Rev. May 14.1947) AECM 6240 Note and return.

N tutilALS i(EMARKS Forwarded herewith is a telegram from f f TO ($ ame and unit)J. P. 'O'Reilly

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Chief, RI&EB, CO:HQ Charles E. Platt, Superintendent, Ginna Station,  ;

Rochester Gas & Electric Corporation, received

$NITtALS RL,s AR KS TO (Name and unit) un 1

ErsTIALS REntARKS TO (Name and unit) i un >

f FROM (Name and unit) y, REMARKS 1

E. M. Howard i Sr. Reactor Inspector ' '

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- .. 7'/8/70 ,

sco : esse e-a,a-es, USE CTHER SIDE FOR ADDITIONAL REMARKS l

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