ML20084E328

Telecopy of AO 50-244/74-01:on 740118,during Removal of Insert Steam Generator a Hot Leg,Inrush of Air to Generator Occurred Causing Imbalance of Water Still in Tubes.Boration Started Immediately

ML20084E328
Person / Time
Site:	Ginna
Issue date:	01/21/1974
From:	Platt C ROCHESTER GAS & ELECTRIC CORP.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20084E306	List: ML20084E309 ML20084E328
References
AO-50-244-74-01, AO-50-244-74-1, NUDOCS 8304150019
Download: ML20084E328 (3)

Text

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C C t dC. 'iESTER NY JAN21 ,

r?. .; 'W:S P 0'REILLY, DIRECTOR

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4 JI' Jico. ATE OE REGULATORY OPERATIOdS .

tt;i c.N 1 US ATGM:C DIERGY COMMISSION 031 P AG AVulUE K !NG OF PEU.:SIA, PDitISYLVidIIA 19406 SUBJ ECT UNCONTROLLED 02 AB'IOR:1AL U:iANTICIPATED OCCURRDICE CHANGES IN74-1, REACTIVITY OF '

GREATER.THA'1 1/ DELTA K/K ' '

Pi aCCOnttilCE UITH THE TECICIICAL SPECIFICATION 6.6.2A ANIOR'ihL OCCURRCICE REPORTS, UHICH REQUIRES tiOTIFICATION BY TEl.EPHONE AMD 8

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TELEGef.PH. THE FOLLOUING REPORT IS SUBMITTED D'! I h M Yy JtdUNRY 18 1974 UG2iniDI RE!!0VED THE MINUAY COVE 1 IND T"E P. "JA Y P:Si?.T FPO:1 THE," A* STEtJi CDiER ATOR EDT tr.G SC; TIC i. Ali A:.. E, !Jia if.;0 INSTALLED Ct! THE REACTOR VESCEL HEAD VE9T IND *i'G F JLL:N; Ala THr.0U;3 THE PRESSURIZER VENT, THT.0UCR THE LOCT:: (T.J UATE R

L"".Et Fi THE LOOPS Uf.S BEIMG MAINTAIMED IN t.CCORDt.10E UITH fjP20V4D Pr ;GD'J:'.E' ) NiD EISCHARGI"G TO THE CONTAINME:IT EXHI.UST EUCT.

J t.S T::d "A" STET.M GDiERisTCR HOT LEG INSERT UAS EDChD. THF. lie VAS id IN-aUSH OF AIR TO THE "A" STET.M CDIERATOR. Tills IN-R'lS" 07 AI O

CAUSED AN UMBALANCE OF THE UATER THAT UAS STILL IN THE STEAM C.NERI,T) j R TUBES, /J1D THIS WATER THDI DRAINED INTO THE LOOPS AllD DILUTED THE

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WATER IN THE REACTOR. '/ j

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8304150019 740311 PDR ADOCK 05000244 S PDR

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e T 0: REACTOR COOLA SYSTEM WATER VAS SPPROXI TELY 400 PPM IN'1 ',T.Di THE U!!IT WAS REMOVED FROM SERVICE ON J ANU ARY 1, 197 %

0" . tie.GY 2 1974 THE REACTOR C00LAtlT SYSTEM UAS BOSATED TO A .ioT i EL"ROU1CCdITICtl-657PPME0RON.

LATEtt CN UMEN IT UAS DECIDED TO C0 TO A COLD S:IUTDCV:? r01LITIOM, TW. pes.CTcn C00LA iT S'lSTDI UAS DORATED TO 913 PPM LORr.l. Th'

" . ','0.mL HEAT RE'10 VAL SYSTEM VAS Iti OPERATIO!! MAItlTAINIi!G T:;E G010 C:wiD;.1 C01DITIOf.

LPI IT FEcAME APPARDiT THAT THE UNIT UOULD DE DC'JII FOR F 0D:VL

'!Hr. OPE 3ATORS VERE TOLD TO It! CREASE THE EORC1 CG::CE1 Tim I 0 UE"/.S,:ATER 10 Gi.. TH AN 2,000 PPM I!i A?iTICIPATI0!! 07 A EETUELIN'i Odi~.~.F.

ThE CTEAM CE::E3ATORS HAD EURPED SEVERAL TI!iES t.FIER Ti:E IS IN/.RY SYSTE'1 VATER LEVEL UAS LOVERED TO A LEVEL IN ACCORDlJICE UITH THE f

g FECCDU2E. BUT EVIDDITLY A LARCE AMOU:IT. 0F 913 PPM FORC1 YATO Uf.S

' MILL I1 THE STEAM GE'IERATOR TUDES UHDI THE RESIDUAL E'/.T F.D:m L Si wi L*/ S PLACED I:I OPERATIO:1. THE RESIDUAL 1: EAT RD'.0 /AL .D J 41 l Ti 3 ITT SUOTI0ti FP.0:1 T;IE ' A' H AI:1 C0OLANT LCOP HOT 1.EC /C E c i . '. 7 C

. 'i .: "'i 2 TO THE *B" I'Afri C00Ltl:T LOOP COLD LEG.

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CI- D'L. ' G l'"_3 MIXFS Ti:E UATER Di THE RE.'.CTC2, DUT s.,,

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, ' 1J :- , . ~ . . UATER I!! T:7. STEi.M GL :E:: ATOR DRAM ^ 70 Y::E ! O

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. a 'r.L T!:". 2,123 PFM UATEP. THf T UAS EEF:G CI?.CCL?.TI.D T'. ' ; .;

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. FECHWI: 0 IN A FIN AL DORCN CO. ICE'!TRATI',:1 0F 1, '5 D . M . iid

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C. . a ' .: :'; TF l0dOH THE REACTCR. THIS UAS A Ci!WCE I:1 .MCT ' IT 'i i I ,: :IMATELY 3/ UHICH UAS GREATEP. THA!! CUR TECHNIr'L SrLCI-

F ~ ;'.T C1 LI

:IT 07 h L":CCMTROLLED OP. CIA:iTICIPATED Cilt.W P:

Eii.0TiiiTY. THERE.UERE lio SAFETY IMPLICATIQUS CF THE I

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i IT 0?ILY EEDUCED O'UR SHUTDOUN MARGIti FROM APPROXIMATELY 16/ TO 13/.

5:2 ATIC'l UAS STARTED II'MEDI ATELY DY THE OPEP,ATORS, AIID 2 HOURS LATER j THE BORON CONCDITRATIO!! Iti THE REACTOR C00LAtiT SYSTEM UAS BACK TO 2103 ppd.

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CHf.RLES E PLATT, SUPERINTCIDDIT I CI'iNA STATI0ft i ROCHESTER CAS & ELECTRIC CORP.

NNU:IM N.. .

O O MEMO ROUTE SLIP _

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• bout 'N '- F o' aac ="*ac a- 'o' act'oa-rorm Aic-n ou,. sin u. niin au si ono N o , s .d ,,,,,n. vor .i.n ar o,.. x r o, ineu m,, ion.

TO (Name and w,.it) IhlilAL1 REMARKS ROC!IESTER GAS AND ELECTRIC R0 Ch ie f , F &EB RO:llQ (4) ""^

R0 Fi1es D^tt DR Central Files Dircerorato of A0 74-1 TO (Name and unit) lNITI ALS REMARKS The above A0 is forwarded for information.

Licensing (4) l OCC l , Distribution will be made by this office to the 1

1 PDR, Local PDR, NSIC, DTIE, and State TO (Name and unit) INITLALS REMARK $

Repre sentatives .

DATE F ROM (Name and unst) REM AR KS

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E. J. Brunner Region I PHONE % DATE 8-337-1246 1/29/74 USE OTHER 54CE FOR ADDITIONAL RLMARKS croegevi o.4 5..#,

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