ML20042B398

LER 82-013/03L-0:on 820222,following Reactor Trip,Rcs Dose Equivalent I-131 Concentration Exceeded Tech Spec Limit. Caused by I-131 Concentration Spiking to Max of 2.33 Uci/G. Unit Returned to Operation & Iodine Values Leveled

ML20042B398
Person / Time
Site:	Cook
Issue date:	03/18/1982
From:	Palmer R INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20042B393	List: ML20042B392 ML20042B398
References
LER-82-013-03L, LER-82-13-3L, NUDOCS 8203250277
Download: ML20042B398 (2)

Text

.__

^ ~

LICENSEE EVENT REPORT CONTROL BLOCC l l l l l l lh (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATIONI lo lil $l 9M l I LICENSEE J

l D l CCODE l C l 2 l@lle 15 0 l 0 l 0 l 010 l 0 l 0 l 0 l 0 l 0 23l 0 l@l LeCENSE NuMtiEH 26 411 LICENSE11TYPEl1 JOl 1 l@l l bl LAI 6d l@

CON'T 10111 SOE lLj@l 015101010 l 311 l 6 l@l 01212 l 2 l 8 l 2 l@[0_ l 3REPORT 74 75 I l 18 l 81280l@

DATE

/ 8 60 61 DOCKET NUMBER 68 63 EVENT OATE EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h 10121 l FOLLOWING A REACTOR TRIP, THE REACTOR COOLANT SYSTEM (RCS) DOSE EQUIVALENT (DOSEQ) l g

[O i3; l IODINE I-131 CONCENTRATION EXCEEDED THE 1.0 pCf/ gram STEADY STATE LIMIT OF TECHNICAL i O i .i i l SPECIFICATION 3.4.8. THE IODINE LEVELS REMAINED IN EXCESS OF TECHNICAL SPECIFICATION l l 0 i ., i l LIMITS UNTIL 0828 ON FEBRUARY 23, 1982. PREVIOUS SIMILAR OCCURRENCES INCLUDE: l l0isi l50-315/78-026,76-059; 50-316/81-049,82-004. g IO lil I i I

io is l I ,

DE CODE SLBCO E COVPONENT CODE SUSC DE SL E 1o19l

/ d l Cl Gl@ I X I@ l Z l@ lZ lZ lZ lZ lZ lZ l@ l Zl@ l Zl@

9 to 11 12 13 18 19 20 EVENT YE AR REPORT O ODE Y N LE Rt RO O ,a&Pgf l 8l 2l l-l l0 11 13 I l/l l013l lL l l-l l01

_ 21 22 ?J 24 26 27 28 29 30 31 32 KEN AC ON ON PLANT ET HOURS S a IT FO A 8. SU plt MANUFACTURER lXl@lZl@

JJ J4 lZl@

35 LLj@

36 10 101010I40 31 LL]@

41 IN 42 l@ W@

43 l44Z l9 l9 l947l@

CAUSE DESCRIPTION AND CORRECTIVE ACTIONS liioilON FEBRUARY 22, 1982, FOLLOWING A TRIP FROM 100% POWER THE RCS DOSEQ-I-131 SPIKED TO l li ii i l2.33 pCi/ gram. PRIOR TO THE TRIP, RCS DOSEQ-I-131 WAS AVERAGING 9 x 10~ pCi/ gram. j

, , , , , ,FOLLOWING THE TRIP THE UNIT WAS RETURNED TO FULL POWER OPERATION AT 0333 HOURS ON i,i3i l FEBRUARY 24, 1982, AND THE DOSEQ RCS IODINE VALUES LEVELED OUT AT APPROXIMATELY l

-I ii i4i i l x 10 pCi/ gram. (SEE ATTACHED SUPPLEMENT). l

'ST2WS sPOwER OTsEn STATUS @ EiSCOSNv' DISCOVERY OESCRiPTiON @

l li is l l G l@ l 0] 0l Ol@l NA l lBl@lROUTINECHEMICALANALYSIS A TIVITY CO TENT RELEASED OF RELE ASE AMOUNT OF ACTIVITY LOCATION OF RELE ASE li16i 8LZ_1@

1 9 LZ.J@l to 11 NA J 44 l

45 NA 80 l

PERSONNEL EXPOSURES NUV8ER TYPE DESCRIPTION l

l i l 71 101010 l@l Z l@l NA PE RSONNE L INJURIES

=

NUMBE R DESCRIPTION l

li l 4 l l 0 l 010 l@l NA OSS OF 06 D GE TO FACILITY i 9 NA l l Z l@l10 80 r . 9 7 920319 *"E""

ISSUE OE R O UNh R 1 i i i i iiiiiiiii:,

umu8 9iN i'eL_ s I 10 68 69 80. .

~

N AME OF PREPARER PHONE:

L

s ATTACHMENT TO LER#8 113/03L-0

' SUPPLEMENT TO CAUSE DESCRIPTION THIS REPORT IS SUBMITTED PERSUANT T0 THE REQUIREMENTS OF APPENDIX A' TECHNICAL SPECIFICATIONS 3.4.8 AND 6.9.1. ON FEBRUARY 22,'1982, THE DOSE EQUIVALENT 10 DINE-131 ACTIVITY-IN THE UNIT 2 REACTOR COOLANT-SYSTEM WAS FOUND OUT OF SPECIFICATION.

AT 1532 HOURS ON FEBRUARY 22, 1982, THE UNIT EXPERIENCED A 100% TRIP. LAB-ORATORY ANALYSIS AT 1735 HOURS ON FEBRUARY 22, 1982, INDICATED THE REACTOR COOLANT DOSE EQUIVALENT 10 DINE-131 CONCENTRATION HAD SPIKED TO A MAXIMUM OF 2.33 pCi/cc.* THE DOSE EQUIVALENT 10 DINE-131 ACTIVITY REMAINED OUT OF SPEC-IFICATION UNTIL 0828 HOURS ON FEBRUARY 23, 1982. ALL SUBSEQUENT ANALYSIS INDICATED THE REACTOR COOLANT ACTIVITY TO BE DECREASING IN IODINE ACTIVITY.

THE UNIT WAS RETURNED TO CRITICALITY ON FEBRUARY 23, .982, AT 0204 HOURS AND POWER WAS SLOWLY INCREASED. FULL POWER OPERATION WAS ACHIEVED AT 0333 HOURS ON FEBRUARY 24, 1982. CVCS LETDOWN PURIFICATION FLOW WAS MAINTAINED AT THE MAXIMUM OBTAINABLE THROUGHOUT THIS INCIDENT.

IODINE- RELEASE AT THIS TIME PERIOD IS CONSISTENT WITH DATA REPORTED IN WEST-INGHOUSE ELECTRIC CORPORATION WCAP-8637, " 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.

l 1

i s

t

_ . , _ _ _ ._