ML20024D517

LER 83-059/03L-0:on 830629,during Surveillance Test of Ice Condenser Baskets,Min Average Ice Weight of Sample Baskets from Bays 6,7,8 & 9 & Row/Groups 8-1,8-2 & 9-1 Found Nonconservative.Probably Caused by Natural Sublimation

ML20024D517
Person / Time
Site:	Cook
Issue date:	07/28/1983
From:	Palmer R INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20024D508	List: ML20024D506 ML20024D513 ML20024D517
References
LER-83-059-03L-01, LER-83-59-3L-1, NUDOCS 8308050164
Download: ML20024D517 (2)

Text

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8 6J 64 COCKET NUMBER nd 63 EVENT OATE i4 it REPORT DATE e0 EVENT' DESCRIPTION AND PROSABLE CONSEQUENCES h l O i ;] l DURING A SCHEDULED SURVEILLANCE TEST OF THE ICE CONDENSER BASKETS, THE MINIMUM AVERAGE I

ae3l l ICE WEIGHT OF SAMPLE BASKETS FROM BAYS 6, 7, 8. { and R0W/ GROUPS 8-1, 8-2, AND 9-1 WERE l 1 o e a ! I FOUND TO BE LESS THAN 1220 POUNDS / BASKET AT A 95% LEVEL OF CONFIDENCE. THIS CONDITION l l o i + l 1 WAS NON-CONSERVATIVE WITH RESPECT TO TECHNICAL SPECIFICATION 4.6.5.1.b.2. THE ACTION l 6 0 l > 1 l REQUIREMENTS WERE MET. PUBLIC HEALTH AND SAFEi( WERE NOT AFFECTED. PREVIOUS OCCUR- 1 IOIiIlRENCES INCLUDE

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ATTACHMENT TO LER# 83-059/03L-0 SUPPLEMENT TO CAUSE DESCRIPTION ICE LOSS APPEARED TO BE A RESULT OF NATURAL SUBLIMATION. ICE MASS WAS ADDED TO THE TOPS OF R0W 8 BAYS 1-16 AND R0W 9 BAYS 9-16 BASKETS TO MEET THE MINIMUM TECHNICAL SPECIFICATION 0F 1220 POUNDS.

IN ADDITION THE FOLLOWING MEASURES HAVE BEEN TAKEN:

RFC 12-1758 - AIR HANDLER UNIT PROGRAMABLE DEFR0ST CONTROL. DESIGN COMPLETED, MATERIAL ON SITE FOR UNIT !.

RFC 12-2605 - WALL PANEL DEBRIS SCREENS. PREVENT DEBRIS FROM RESTRICTING AIR FLOW IN AIR HANDLER UNITS WALL PANEL. UNIT 1 COMPLETED, UNIT 2 INSTALLATION IN PROGRESS.

RFC 12-2610 - VOLUME CONTROL DAMPERS. DEVELOP UNIFORMITY IN ENERGY REMOVAL FROM ICE CONDENSER. INSTALLATION IN PROGRESS.

RFC 12-2612 - DELAY FOR AIR HANDLER UNIT START FOLLOWING DEFR0ST. PREVENTS H0T AIR FORM FLOWING INTO WALL PANEL. DESIGN COMPLETED.

RFC 12-2631 - GLYCOL CHILLER MODIFICATION. EXTENSIVE ENGINEERING REVIEWS WERE COMPLETED THAT IDENTIFIED EVAPORATOR DESIGN DEFICIENCIES, WHICH DETRACTED FROM CHILLER EFFICIENCY. DESIGN CHANGES IMPLEMENTED.

THREE (3) 0F TEN (10) CHILLERS COMPLETED TO DATE.

THE AEP ICE CONDENSER TASK FORCE IS CONTINUING ITS EFFORTS TO STUDY AND MAKE RECOMMENDATIONS FOR REDUCING ICE LOSS RATES.