ML19318D254

LER 80-028/03L-0:on 800520,during Circulating Water Sys Chlorination,Total Chlorine Residual Exceeded Limit.Caused by Chlorine Demand Decrease Following Steady Increase. Chlorination & Blowdown Reduced

ML19318D254
Person / Time
Site:	Fort Saint Vrain
Issue date:	06/19/1980
From:	Gahm J PUBLIC SERVICE CO. OF COLORADO
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19318D248	List: ML19318D247 ML19318D254
References
LER-80-028-03L, LER-80-28-3L, NUDOCS 8007080262
Download: ML19318D254 (1)

Text

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NRC FCCM 366 U.S. NUCLE.. 4 KEGULATCRY COMMISSION l (7. m .. .

ucENSEE EVENT REPORT '

CONTROL BLOCK: l l l l l l (PLEAS,E PRINT OR TYPE ALL REQUIRED INFORMATION) l 0 l 8t l9 l cl 0l F l s l vl 1l@l 0 l 0 l -l 0 l 0LICENSE 15 l 0 l NUM8ER 0 l 0 l - l 0 l 0 l@( 25 4 l 1LICENSE 26 l 1 l 2TYPE l 040l@l57 CATl l@

58 7 uCENSEE CODE le CcN'T lolil [,"Ce I t }@l Ol 5 l Ol 0 l 0 l 21617 @l 01 S l 210 l 8 l 074l@l75 016REPORT l 11918 CATE l 080l@

7 8 60 61 00CKET NUMBER 68 69 EVENT 0 ATE EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h l o 121 1 On May 20,1980, during the regular chlorination of the circulating water system, the l I o i 3 I l total chlorine residual exceeded the LCO NRl.1 limit of 0.5 ppm chlorine. There was I l o l at l l no affect on oublic henith or nafety. There ire nn rel ated occurrences . This in I l o I s l I reportable per Fort St, Vrain Technical Specification AC 7.5.2(b)2. l l

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13 18 19 20 7 8 9 10 11 12 SEQUENTIAL OCCURAENCE REPORT REVISION EVENT YEAR REPORT NO. CODE TYPE N O.

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@,ag 18101 21 22 1-1 23 101218I 24 26 I/l 27 10 13 I 28 29 I tl 30 l-l 31 10 I 32 N AC ONP NT ME HOURS S8 i POR 8. SUPPLIE MANLPAC RER LsJ@l1J@ LzJ@ L2.J@ 101010101 I41 v i@ Isl@ Izi@ Izl919191@

33 34 35 36 31 40 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h l i 101 l A decrease in chlorine demand by the circulatine water system af ter a ceriod of steadvl m l increase resulted in over chlorination of the system. The circulatine water blevdown i I i i 2 I I resulted in a hich residuni chl ori ne level in the 91nne ef*1uent. chleMnneien and l I i I 3 I l blowdown were reduced. No further corrective action is anticinated or recuired. I l i 141 l l 7 8 9 80 ST  % POWER CTHER STATUS I O Y DISCOVERY DESCRIPTION lt l5 l lE lh l 0 l 417 l@l N/A l l A l@l Operator Observation l ACTIVITY CO TENT RELEASED OF RELEASE AMOUNT CF ACTIVITY LOCATION OF RELEASE l1 l6l lZ l h [Z_j @ l N/A l l N/A I 7 8 9 to 11 44 45 80 PERSONNEL EXPOSURES NUV8ER TYPE DESCRIPTION li l 7* l'l010 l0 @M@l N/A l

PERSONNE L INJURIES NUV8ER DESCRIPTION l

lt Is 8l l0 7 9 l 0 l0 l@l12N/A 11 80 LOSS OF CR DAMAGE TO PACILITY TYPE DESCRIPTION l

l t 198 l9 l Z lhl10N/A 7 . 80 DE CRIPTION

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