ML18037A241

LER 80-006/04L-0:on 800123-24,condensor Inlet/Circulating Water Discharge Temp Exceeded Tech Spec Limit.Following Flow Reversal,Discharge Temp Exceeded Lake Ambient by More than Tech Spec Limit.Caused by Instrument Failure

ML18037A241
Person / Time
Site:	Nine Mile Point
Issue date:	02/20/1980
From:	Hedrick M NIAGARA MOHAWK POWER CORP.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML17053B431	List: ML17053B430 ML18037A241
References
LER-80-006-04L, LER-80-6-4L, NUDOCS 8002260650
Download: ML18037A241 (2)

Text

WWP- 2045 NIAGARA MOHAWK POWER CORPORATION/300 ERIE BOULEVARD WEST, SYRACUSE, N.Y. 13202/TELEPHONE (315) 474-1511 Feb/uIa/I,y 20, 1980 hh,. Boyce H. Gme/L, DmecCo/L 0~ed SCaCes Nuclea/L RegulaCo/Ly CommQ a~on - Regs on I 631 Pa/Ik Avenue, King os P/Imam, Pennsylvania 19406 RE: VockeC Mo. 50-220 LER 80-06 Dean, A,. Gru.e/LI Pru'.o/L Co Janua/Iy 23 aC 1630 M ups oboe/Lved Chat Che condense/L ~nleC/

~culm'.ng eaCe/L dLscluuge CempercaCu/Le LT exceeded Che Cechru'.cal speci;

(~cation oII 31.2oF as anNcaCed on Che hou/Ily compuCM. ptu'.nC ouC. AC Che, aame CUIIe Che, chaIIC /Ieco/Lde/L ~ndLcaCed only 30oF/tT. Since p/I.ev~ous compuCM. /LeaNnga had been ~n question, M gas assumed ChaC Che, 30oFQT

ÃQs co JI/l,ecC.

Subdequew5!g aC =1600 on January 23 a caLib/IaCLon CesC.@as rmn on Che, circulating uxLCe/L Cempe/IaCu/Le syaCem andri Nas found Chat Che. C/tue bT Ioas abouC 32OF and Chat Che, chaIv'rcecorcdeII. had been ~n&cating abouC 2oer cess Chan acCual due, Co (mixture an an ele~oru'.c compone&.

Lb unc~n IIIhen Elm $ aLlurce occurI/I.ed buC Che /I.ea&ng otI Che. compuCe/L and Che ctuUIC /I,eco/Lde/L uIe/Lz /I.easonably close Co Che, saIne on JanuaII.y 17 and 18 (IIIell belol 31.2oFQTI, and Che, $ ~C majo/L dep~e eu noCed on Ja~uuuI,y 21,22.

On Ckcb basm M may be, p/IesuIned Chat Che >31.2OF T sCa/ICed on Janua/Iy 21, 22 IIIhen. ruble ~h Che, cknculating NaCe/L sc/Ieens Was encounCe/Ied.

Analym o) Che, Cempemt'u/Ie pmblem Ioas comp&caCed by aubaequenC JaiRuIIe o) CuIo cL/1.colaCLng eaCu. C/IaveLing acII,een dpi.ves and Che necesaMy o)

/I.evercbcng tIlo<0 on Janmuuf 24 because o( anCake acing. HoIveve/L, as hoon was esCab~hed Chat >31. 2 F 7 e~Ced, Che, a~on potu. ouCpuC Its /Ieduced Co beau'.ng Che 67 beloI0 31.2OF.

On Janua/Ii~ 24,25 Che ~cluvIge CenpetaCu/I,e/lake ~nCake dT i0as beCI0een 51 and 53 F mo/I.e Chan CI0o ho~ JolloI0ing rceveILse l'IloIII coI~y Co Che 50oRT open.pcaCLon. TM I0as caused by an ~nabMLty Co ruxpadly /Leduce

/I,e~c~on goiu.

nh.. Bodice H. Gru.er.

Febmmg 20, 1980 Page, 2 omicron Co no.wan (Lotv and duru.ng Che n,ccuceat Co (ulcc cl~ ~~

FoZZoiwng popover;, on January 28,29, 1980, ~he 31.2 FAT vxv agm.n exce.eded acco.xN.ng Co boCh Che compte". and aeadoM. Thu con~on v~

4e,~need <<'hen r'eacCoc pouches. tv'ubbeoueetCg,<educed. 1nvmWg~on ducLoaed Cleat a .aedu~on ~n ~cuZaWi~g wale< (Zoiv wu Che p~nmii caMh e.

On Febuazng 9, 1980, ~vhen Che a~on em pa+".udder ah~i down (on.

.xeomxed ~mW, Che condeiuen, ~nfl mMerc box'vme ~>vpeMe'd and efearced o$ deb~. An appcoximMefg 20,000 gabon pen, minMe ~nurse

~n condeaso.x ~cong waCm (Zotv .<mukted.

Regula amveiLCance o( aedundaet circc~ng vixen. tempera@'.un.e metuurce men& and primp< anaLya~ o$ oping con~cia Leaching Co ge~m 4!~ Che occu-Chan notus conde>v m ~culling calm hT should r;ance o( a prolonged pvu'.od o( excessive condeuex BT mauve.e v~ be peeve>Wed

~n She $ ~e. Iiu~~e< Sech>u'.cia>v, op~ore, and mai,penance pen.-

sonnet have been ~n$ ormed on Che calm, consequence and,~xevenWon oq Whee occur~new.

Ve'ug ~p gcu&,Peptide>M original signed by James Bartlett Jam'c~~

Executive V~ce