ML20085E797

Telecopy Message Ao:On 751029,interchanged W Prime Curves Resulted in Nonconservative Heat Rate Calculation for Core Limiting Assemblies.Caused by Improper Conversion of Flux to Power by Inca Power Distribution on 730619

ML20085E797
Person / Time
Site:	Palisades
Issue date:	10/30/1975
From:	Elward T, Slade G CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.)
To:	Baker K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
NUDOCS 8308160589
Download: ML20085E797 (1)

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. A 3 Y YHEA emme L A 2 3 E' D 527 P CST C _2.;0(1439)(1-919295 A303)PD 10/30/75 1425 l IL., CJNG0V ER J KN

~ ~. 2?3 DLY JACKSON MICH 10/30/75

~.; 4R K " 9AKER

..ALCAF RE1ULAT0*Y COMMISSION (FORMERLY AEC)

L Mu0SEVELT '0AD

L .s ELLYN, Il e  ;;; JECT DALISADES PLANT-3 IMDRODER CONVERSION OF FLUX TO POWER BY THE INCA POWE' DISTRIBUTION E

g inIS TWX IS SE!!T TO FOLLOW UP MY CONVERSATION WITH K R BAKER ON.

!E AFTE*? 00N OF OCTOBER 29, 1975. IT HAS NOT YET BEEN DETERMINED

!;d I THE STPICT DEFINITION FOR AN ABNORMAL OCCURRENCE INCLUDES THIS TY E OF OCCU'tRENCE. HOWEVER, UNTIL WE CAN SHOW THAT IT CLEARLY IS i..;! AN A3 NORMAL OCCURRENCE, WE WILL CONTINUE TO TREAT IT AS IF IT CRE.

. A 4FRIME CONSTANT IS USED TO CONVERT INCORE MILLIVOLT INFORMATION 5 I;sTJ P06.'E' INFORMATION. WP.'!IME IS A FUNCTION OF BURNUP. EIGHT

IFFE*ENT 'JPPIMES ARE USED FOR THE VARIOUS FUEL TYPES AND RADIAL P;3IIIONS IN THE DALISADES CORE. IT WAS DETERMINED ON OCTOBER 29, in AT 149.' MOU*S THAT IMPROPER WPRIMES WERE ENTERED INTO THE INCA E C;,GDE ON JUNE 19, 1973 lum t!

CE THE ADMIL 1975 STA*T-UP THE ERROR AS A RESULf 0F ERRONEOUS

'. F'IMES HAS DEEN CONSERVATIVE KIE, HIGHER THAN ACTUAL HEAT RA,TES G 0308160589 751030 gDRADOCK 050005g

.ERE CALCULATED FOR THE CORE LIMITING ASSEMBLIES). ON OCTOBER 29 13 n , IT VAS DETERMINED THAT FOR JUNE 1973 THE INTERCHANGED WPRIME l CUF9ES RESULTED IN A NON-CONSERVATIVE HEAT MATE BEING CALCULATED .

Fo) THE CORE LIMITIN3 ASSEMBLIES. THIS RESULTED IN SETTING A CORE

'11 E HEAT MATE LIMIT- WHICH VAS 2 PERCENT LARGER THAN IT SHOULD HAVE BEEN.

i10RE DETAILED INFORMATION WILL FOLLOW WITH SPECIFIC CURVES AND I CALCULATIONS. 4 3 B SLADE/T V ELVARD PALISADES PLANT 3 CONSUMERS POVER COMPANY C34 N

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