ML20086F623

Ao:On 750527,RCS Sample Indicated 0.16 Ppm Oxygen,Exceeding Tech Specs.No Cause Stated.Concentration Reduced

ML20086F623
Person / Time
Site:	Robinson
Issue date:	05/27/1975
From:	Mcgirt J CAROLINA POWER & LIGHT CO.
To:	Knuth D, Mosely N NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II), US ATOMIC ENERGY COMMISSION (AEC)
Shared Package
ML20086F617	List: ML20086F620 ML20086F623 NG-75-1212, Revised AO 50-261/75-11:on 750527,RCS Oxygen Concentration Found to Be 0.16 Ppm,Exceeding Limit.Caused by Inattention to Hydrogen Concentration & Dilution of RCS to Hot Shutdown Boron Concentration.Vol Control Tank Vented
References
NUDOCS 8401030444
Download: ML20086F623 (2)

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ItOH1NDON STEAM VT;rnTRIO PMT Poet Office Dox 7r)O Ha rtovill o, 22nuth C es en1 1 nen May 27, 1975

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. Norman C. Ho m eley, Director rectorate of H orul o t,n ry ()pu rra ti on e

n. Tiun1nne Itagnan t.ory commission giura 11, Suite 818 O Peachtree Street, ff.W.

3antn, Uenrgin 30303

. 1)one 1d K nu t.h, Director rentorate of Regulatory Operations S.

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noonedannn wi th 22 nut. ion 6.6.2 of the Technical Specifications, the 1'inving Isbnonmal Occurrence is reporteds 0930, May 27, 1975, vith thu rna u t.o r es t 33% t'ower tsnd ina r-s eing llowing c maintenonen nu t.en na, en re ss utor (soolant systern sanul/lis indicated 3 6 prvn unt-o n.

Thin nonatitutes a violation of Technical newei fi cati on 1.6.1 whiuh limits RCS oxygen to O.1 ppm above 250"F.

Y mmoit i n i,e, evi>ren n t.1 v u tion was taken to reduce tho oxygnn nunn nn t.res t.1 on, vand, by 2.11 b, the reactor olant system oxygen concent.rn t.l on h n al bunn rueluund to within aspecificestions.

in incident constitutes an Abnormal Occurrenco e n ein f*1 nnr1 in huhteinal acif$ ceti on 3.3.h and vnn rn tsu r t,uit by t..e le ph one to Mr. Marvin Gincule of C,

A t.3 ra n t,rs, on May 7't, 19't S.

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d'QL Letter to N. C. Moceley from Carolina Pouer and Light Co pany dated May 27, 1975 DISTRTPUTIoit:

50-261 II. D. Thornburg, IE

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Office of Standards Development Central Files Division of Reactor Licensing (4)

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