ML18127A652

LER 1978-024-00 for St. Lucie Unit 1, on 06/25/78 Concerning During Plant Startup from a Short Maintenance, Dose Equivalent Iodine Exceeded Technical Specification 3.4.8.A Limit of 1.0 Uci/Gram Dose Equivalent

ML18127A652
Person / Time
Site:	Saint Lucie
Issue date:	07/24/1978
From:	Schmidt A Florida Power & Light Co
To:	O'Reilly J NRC/RGN-II, NRC/IE
References
PRN-LI-78-198 LER 1978-024-00
Download: ML18127A652 (7)

Text

REGULATORY INFORMATION DISTRIBUTION SYSTEM (RIBS)DISTRIBUTION FOR INCOMING MATERIAL 50-335 REC: OREILLY J P NRC ORG: SCHMIDT A D FL PWR 5 LIGHT DOCDATE: 07/24f78 DATE RCVD: 08/01/78 DOCTYPE: LETTER NOTARIZED:

NO COPIES RECEIVED

SUBJECT:

LTR 1 ENCL 1 FORWARDING LICENSEE EVENT REPT (RO 50-335/78-024)

ON 06/25/78 CONCERNING DURING PLAN1 STARTUP FROM A SHORT MAINTENANCE i DOSE EQUIVALENT IODINE EXCEEDED TECH SPEC 3.4.8.A LIMIT OF i.0 UCI/QRAM DOSE EQUIVALENT I-131...W/ATT.PLANT NAME: ST LUCIE Si REVIEWER INITIAL: X/M DISTRIBUTOR INITIAL: QQ DISTRIBUTION OF THIS MATERIAL IS AS FOLLOWS 4++4<<+4<+<<<+4<<+

INCIDENT REPORTS (DISTRIBUTION CODE A002)FOR ACTION: INTERNAL: EXTERNAL: BR CHIEF ORB84 BC++W/4 ENCL F L~ENCL u+~W/2 ENCL I 8.C SYSTEMS BR++W/ENCL NOVAK/CHECK++Wf ENCL AD FOR ENG~4W/ENCL HANAUER~~W/ENCL AD FOR SYS 8c PROJ++W/ENCL ENGINEERING BR+4W/ENCL KREGER/J.COLLINS++W/ENCL K SEYFRIT/IE++W/ENCL LPDR S FT PIERCEi FL++W/ENCL TICi LIZ CARTER~~%W/

ENCL NS I C+~W/ENCL ACRS CAT B~~W/16 ENCL NRC PDR44~W/ENCL MIPC+~W/3 ENCL EMERGENCY PLAN BR>~W/ENCL EEB4+W/ENCL PLANT SYSTEMS BR+4W/ENCL AD FOR Pl ANT SYSTEMS+<W/ENCL REACTOR SAFETY BR>~W/ENCL VOLLMER/BUNCH%4W/ENCL POWER SYS BR++W/ENCL DISTRIBUTION:

LTR 45 ENCL 45 SI ZE: iP+1 P+3P%%%%0f 0f%%%Sf%%%%%%%4 0f%%%%4 4%8/%Sf SHt%%%%CONTROL NBR: 782140106 THE,END%%%%%%%%%%%%

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p q r W 4 4 N$I P/1 k t 4~i 1 4 k~AI t 8, u , I'-E4 FLORIDA POWER:Iry Q q'J LfY 5 LIGHT COMPANY July 24, 1978 P RN-L I-78-198 Mr.James P.O'Reilly, Director, Region II Office of Inspection and Enforcement U.S.Nuclear Regulatory Corrmission 230 Peachtree Street, N.N., Suite 1217 Atlanta, Georgia 30303 I

Dear Mr.O'Reilly:

REPORTABLE OCCURRENCE 335-78-24 ST.LUG IE UNIT 1 DATE OF OCCURRENCE:

JUNE 25, 1978 TECHNICAL SPECIFICATION 3.4.8.a DOSE E UIVALENT I-131 The attached Licensee Event Report is being submitted in accordance with Technical Specification 6.9 to provide 30-day notification of the subject occurrence.

Very truly yours, 2 A..c mi t Vice President Power Resources MAS/cpc Attachment cc: Harold F.Reis, Esquire Doctor, Office of Inspection and Enforcement (30)director, Office of Management Information and Program Control (3)782l40106 PEOPLE...SERVING PEOPLE S NRC FORM Saa I7.771 LICEIXScc EVCI'4T REPORT U.S.NUCI.EAR REGULATORY C SIMISSICiN CONTROL, BLOC:<: I I I I I.Ql IPLSASE PRINT OR TYPP AL RSCUIRcO INFORN'IATIONI I 0's 1 3 i.iCENSca COOE Q.LIE I LI 111 0 01-101 0101 010 I-I I Q~ll ll 11 11 Q~IIQ LICmslsa NIUAISER'S 26 L;Cc<SE TV?E 40!1~1!a CON'T~o 1!Q 1 i~a I I In I I QE IS Rc?QAT 0*, 3!0":.'*i ML'Q!0 6)CCCKET NVAISEs!~63 sa EVENT QATE EVENT OESCRIPTION

'NO PROGABLZE COVSECUENCES QIO-Durin lant startuo from a sh r 16-hour m i tenance shutdown Dose~03 E uivalent DE Iodine exceeded the Technical S ecification

.3.4.8.a limit of 1..0 Ci ram DOSE E UIVALENT I-131.The DE Iodine was first measured~os above this limit at 1900 on'6 25 78 while the lant was at 97/ower.The!0 1 ifi atio~o~.4.8.a.A revious occurrence of this t e is described in LER 335-78-13!

~oa 1 3 9!0 SYSTcal CAUSc CAUSE C>l.vALv E C OE COCE SVSCCQE C NPONENT OOE svaccca svacoQE QC LZZZS WNS WZG~00 0 Zl NS mic ZZNS 1 6 9 Is)Il 12 la IS I9 SECVENTIAI CCCVAAEiICE REPORT REVISIQNN LSR/Ao VE'IT YEAR R EPOA T 40.CQQE tvPE"IO, Qr ENIEN r.~yg~~02 4~m~03~L 2 I 22 22 24 26 21 29 20 32 ACTION CUTVAE E?RECT SIIUTOQWN AT,ACHMENT 4PROR PRIMPC MP.COAIPON cN 4 TAKE44 ACTION'I CN Pr&NVT,MET)soo HOURS~22 SVSMI 4~ao PCRM)Ua.SVPPl,lcR UANVPACTVRPR MlsL2Js Lz'Q LcQL~0~0~YQ~NS MNIQ~c4 i tl w)2 24 S 26 JP 4 I 42 43 44 41 CAUS" OESCRIPTIO I ANO CORREE 0 IVE ACTIONS Q2i o Af P ri f w r i i h nmina v 1'of fuel e 1 ant shutdown nd s s t s sufficient to cause Iodine build u Iodine s ikin nenomenon and exceed the urification ca acit for a short eriod of time..METNCO QP OISCQVPRY+AQO: 4$4$A NA'IAL O P-R R N.A.Scho man~I 9 P ACILI~sr 3~ATVS'S~?QvlcR QTIIERSNATVS Q LJS 0-0 S~N 1 3 9 tp I 2 la 44 ACTIVITY CONTENT RELEAsco OP RELEASE AMOUNi'QP ACTIVITY QSS CZ L~J Q" L~JQS'A 1 lp It?SRSONNEE XirQSVRES~IVMSER TYPc QESCAIPTIQN QM CZ~~Q2'I Z lO 3 I I 12 Is PERSONNEL Iiv)UR)ca 0 I00 0ci i0 0 iiQN EZ L>~Q42 1 a 1 lp P6LIC,'.Y CH)LEQAA 1 3 1 lp QISCQV SAY OESCRIPTICN Q4-r tor Observation LOCATION oP RPLEAsc QSS 30 30 NROSE C ILY!!I!!I,!I!!I!I ,..(305)552-3802

~LXCENSEE EVENT REPORT PAGE T'tiO~.C4.C SUPPLEHENTARY INFORMATION TECHNXCAL SPECXFICATION PURPORT DOSE E UIVALENT IODXNE V Reactor power histor startin 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> rior to the first sam le in , which the limit was exceeded.DATE 6/23/78 6/24/78 6/24/78 6/24/78 6/24/78 6/25/78 TLilE 1900 to ,.2000 2100 2200 2300 to 1400,-k AVERAGE REACTOR POHER ,97.1%(steady state)61..0%20.0%r 0-0%(plant outage)6/25/78 6/25/78 6/25/78 6/25/78 6/25/78 1500 1600 1700 1800 1900%%38.5%66.3%90.0%95.0%*97.0%Additional Power History: 20%-80%from June 1 to June 12, 1978 98%-100%from June 13 to June 24, 1978 (DEQ I-131;2.0-4.5 E-I pCi/gram)~~'.'.---="--':First DEQ Iodine Sample'>I.O uCi/gram;:

"~'E QEPORTABLE OCCURRENCE 335-78-24 LIC~~']SEE EVENT REPORT'AGE THREE SUPPLEMENTARX INFORMATION (Cont)2.Fuel burnu b core re ion.Fuel burnup by octants: Region 1 Region 2 Region'3 , Region 4'egion 5 Region, 6 Region 7 Region 8 10945.0'0893.7 10781.0 10876.5 10783.6 ,, 10798.3 10752.0 10868.8 Average Burnup in t Megawatt Days per Metric Ton Uranium (I'O'D/HTU) a Total Core Average Burnup-10837.4 N\3.Clean-u flog histor~startin

<>S hours rior to the tirst sample in which the limit was exceeded.Prom 1900 on 6/23/78 until 2100 on 6/24/78, purification flow rate was<82 gpm (two charging pumps).At 2300 on 6/24/78, purification flow rate was reduced to 52 gpm.~From 2400 on 6/24/78 until 0300 on 6/25/78,'urification flow rate was~iO'gpm (onc charging pump).At 0400 on 6/25/78, purification flow rate was increased to 58 gpm.'From 0500 on 6/25/78 until 1900 on 6/25/78, purification flow rate vas w86 gpm (two charging pumps).NOTE: Clean-up demineraliration consisted of a mixed bed at a 1:1~ratio, cation to anion, with a bcd volume of 36 cubic feet.~~4.::-:.-His tor of de-assin o eration s tar tin 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> rior.to the f irs t sam le in which the limit was exceeded.No degassing operations vere performed within the above 48-hour time span.

REPORTABLE OCCURRENCE 335-78-24 LICENSEE EVENT REPORT ,'+AGE IOUR SUPPLEHENTARY XNFORi~fATXON (Cont)5.The time duration when the s ecific activit of the rimar coolant exceeded 1.0 uCi/ram DE X-131.6.Iodine 131 Dose Equivalent was greater than 1.0 uCi/gram from 6/25/78 at 1900 until 6/26/78 at 0030.The total time above 1.0 uCi/gram was 5.50 hours5.787037e-4 days <br />0.0139 hours <br />8.267196e-5 weeks <br />1.9025e-5 months <br />.~" Results of S ecific Activit Anal sis (uCi/ram).DATE TINE 6/25/78 0215.6/25/78 1900 6/25/78 2010 6/26/78 0030 6/26/78 0615.I-131 2.249 E-1 1.024 E-0 1.120 E-0 7.736 E-1 4.708 E-1 1-132 9.66 E-2 8.12 E-2 7.38 E-2'.01 E-2 1.93 E-2 I-133 3.322 E-1 6.963 E-1 7;500 E-1 4.724 E-1 2.393 E-1 1-133 DE/1.311 E-1 3.291 E-1 9.04 E-2 1.222 E-0 9.33 E-2 1.333 E-0 4.92 E-2 9.064 E-1 3.01 E-2 5.386 E-1 I~~I I~