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LER 82-018/03L-0:on 820311,following Shutdown,Rcs Dose Equivalent I-131 Concentration Exceeded Steady State Tech Spec Limit Until 820312.No Cause Given.Iodine Behavior Under Transient Conditions Consistent w/WCAP-8637
	ML20050B082
Person / Time
Site:	Cook
Issue date:	03/26/1982
From:	Palmer R; INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG
To:	; NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20050B080	List: ML20050B079; ML20050B082;
References
	LER-82-018-03L, LER-82-18-3L, NUDOCS 8204020568
	Download: ML20050B082 (5)
	v • d • e

.

. LICENSEE EVENT REPORT I l (PLEASE PRlRST OR TYPE ALL REQUIRED INFORMATIOid CONTROLBLOCK l l l l l1Jdl@l$7 LAI 63l@

I lo I td l9 l M lLICE l

I l*a5EE 0 iCODEC l C l 2 4l@l010 l0 l LICENSE 14 0 l010 l01010 l010 l@l4 NuvetH .' S ;u l1LICENSE l1 11 T'v PE COvT 101i1 %lM l60L l@l 0 l 51010101311 1668 l@l 0 l EVENT 311111812 74 l@lh 013 ! 21618 REPOHT DATE l 8021@

t 8 b1 DOCK ET NUMBER 63 DATE EVENT DESCRIPTION AND PROB ABLE CONSEQUENCES Oto FOLLOWING UNIT SHUTDOWN, THE REACTOR COOLANT SYSTEM (RCS) DOSE EQUIVALENT (DOSEQ) l0 ! l l l 10 DINE-131 CONCENTRATION EXCEEDED THE 1.0 uCi/ gram STEADY STATE LIMIT OF TECHNICAL l

[o t al l

[TjT1 l SPECIFICATION 3.4.8. THE IODINE LEVELS REMAINED IN EXCESS OF TECHNICAL SPECIFICATION l 1o is1 l LIMITS UNTIL 0520 HOURS ON MARCH 12, 1982. PREVIOUS SIMILAR OCCURRENCES INCLUDE: l 1 O is l l 50-315/76-059,78-026; 50-316/81-049,82-004, 013. I I

10171 1 I

loisi l

^

CODE CODE SUBCO E COS*PONENT CODE SUBC DE S E 10191

e IC IG l@ l XI@ I z l@ l zl zl zl zl zl zl@ l zl@ l zi@

9 10 11 12 13 18 19 20 VENT YEAR REP RT O CODE N .

@ ,"LE g.g R.ROI 8 12_] l-l 10 11 18 I l/l 10 13 I IL l 30 l-l 31 l0l 32

_.21 22 2J 24 du 27 28 29 TAKE A T ON O PLANT T O HOURS S a IT D FO 9 UB. SU PLIE MANtJFACTURER l33X l@[Zj@J4 l3bZ l@ LZ_j@

36 l0lCl0l0l 3/ 40 I41 Y l@ lNl@

42 lzl@

43 l44 z 19 l91947l@

CAUSE DESCRIPTION AND CORRECTIVE ACTIONS gl ON MARCH 11, 1982, FOLLOWING A CONTROLLED UNIT SHUTDOWN, THE RCS DOSEQ-I-131 SPIKED l

[ qT) l TO 1.75 pCi/ gram. PRIOR TO THE SHUTDOWN, THE RCS DOSEQ-I-131 WAS AVERAGING 1 x 10-l ;

i,,.il Ci/ gram. (SEE ATTACHED SUPPLEMENT) i l

li l il i I

Iil Il

OY5 ST *bPOWER OTHEnsTATUS ISCO HY DISCOVERY DESCRIPTION I'19I [fG_j @ l 0 l 0 l 0 l @ l NA l lBl@lROUTINECHEMICALANALYSIS l

' * ' " ** ** '6 8 '

Asiviiv COETENT RELE ASED OF RELE ASE AMOUNT OF ACTIVITY LOCATION OF RELEASE Ii le] []_j @ Lz_j @ l NA l l NA l d 9 to tt 44 45 80 PERSONNEL EXPOSURES NUMHER TYPE DE SCRIPTIC,N l i l il l 010 10 l@l z l@l NA 8

l PE nSONNE t iN3u'JiES NOUtiER OESCntPTION li i l 101010 l@l NA l

. hs,s Or On 0,A G TO FACluTY g NA l li 191 8 9 l z l@l10 80 i 7 e

ISSUE i [ 2101 I N [@ l DESCRIPTION NA -1 I]lllllllllll{

f I Si 't in 68 69 80 5 '

R. A. PALMER 616-465-5901 o 8204020568 820326 P"cN E :

PDR ADOCK 05000316 ,

, S PDR

ATTACHMENT TO LER#82-018/03L-0 SUPPLEMENT TO CAUSE DESCRIPTION THIS REPORT IS FlBMITTED PERSUANT TO THE REQUIREMENTS OF APPENDIX A TECHNICAL SPECIFICATIONS 3.4.8 AND 6.9.1. ON MARCH 11, 1982, THE DOSE EQUIVALENT 10 DINE-131 ACTIVITY IN THE UNIT 2 REACTOR COOLANT SYSTEM WAS FOUND OUT OF SPECIFICATION.

AT 0901 HOURS ON MARCH 11, 1982, THE UNIT STARTED A CONTROLLED SHUTDOWN, WITH THE REACTOR G0ING SUBCRITICAL AT 1333 HOURS. LABORATORY ANALYSIS AT 1459 HOURS, INDICATED THE REACTOR COOLANT DOSE EQUIVALENT 10 DINE-131 CONCENTRATION HAD EX-CEEDED THE TECHNICAL SPECIFICATION LIMITS OF 1.0 pCi/ gram. *THE DOSE EQUIVA-LENT 10 DINE-131 ACTIVITY SPIKED TO A MAXIMUM OF 1.75 pCi/ gram AT 1930 HOURS.

THE REACTOR COOLANT SYSTEM DOSE EQUIVALENT IODINE REMAINED ABOVE TECHNICAL SPECIFICATION LIMITS UNTIL 0520 HOURS ON MARCH 12, 1982. ALL SUBSEQUENT DOSE ,

EQUIVALENT IODINE ANALYSIS INDICATED DECREASING LEVELS OF I0 DINE. FOLLOWING l THE SHUTDOWN THE UNIT WAS COOLED DOWN TO MODE 5 AND DEGASSED.

IODINE RELEASE AT THIS TIME PERIOD IS CONSISTENT WITH DATA REPORTED IN WEST-INGHOUSE ELECTRIC CORPORATION WCAP-0637, " IODINE BEHAVIOR UNDER TRANSIENT CONDITIONS IN THE PRESSURIZED WATER REACTOR". DOSE EQUIVALENT 10 DINE-131 VALUES WERE IN THE " ACCEPTABLE OPERATION" PORTION OF TECHNICAL SPECIFICATION FIGURE 3.4-1 AT ALL TIMES DURING THE TRANSIENT. ALL APPLICABLE TECHNICAL SPECIFICATION ACTION ITEMS WERE MET DURING THIS TIME.

FUEL BURNUP BY THE REGION AND ALL ADDITIONAL DATA, AS REQUIRED BY TECHNICAL SPECIFICATION 3.4.8, IS FOUND IN THE ATTACHMENTS.

COOLANT SAMPLES ARE BROUGHT TO AMBIENT CONDITIONS PRIOR TO COUNTING; THEREFORE, UNITS OF pCi/ gram AND pCi/cc ARE CONSIDERED INTERCHANGEABLE.

_ .. . - _ m ._ _ . _ _ . _ _ -

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'v PUPNUP CALCULATION SU"*AAY SNEET gy 4 D. C. Coor. UNIT 2 - g t*

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TATC72 % n it. 19Fc s-i, PEDIOD IJANP2-IIMAD82 g j, , REGION NO eLPP UP COMut ATIVE ENERGY 'i1 CUMULATIVE s F04 DFRIOD BURNUP -FOR PERIOD ENERGY

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,l 1 0.135fte^, G.-222Ct+05 0.lt?0E+13 tr.1758W 14 he; 4

t 2 0.2685E+04 0.239AE+05 0.8065E+13 0.7219E+14 '*

[ 3 0.2611E+04 0.9656E+04 0.901.E+13 0.3335E+14 j h e

' * . COEF TOTAL 0.2504E+04 0.1647E.05 0.1817E+14 0.1231E+19 .

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