ML19324A062
| ML19324A062 | |
| Person / Time | |
|---|---|
| Site: | Maine Yankee |
| Issue date: | 03/24/1980 |
| From: | ABB COMBUSTION ENGINEERING NUCLEAR FUEL (FORMERLY |
| To: | |
| Shared Package | |
| ML19324A061 | List: |
| References | |
| CEN-129(M)-NP, NUDOCS 8006200426 | |
| Download: ML19324A062 (12) | |
Text
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1 COMBUSTION ENGINEERING. INC.
s END OF CYCLE 4 FUEL AtlD CEA EDDY CURRENT INSPECTION REPORT 1980 ffAINE YANKEE REFUELING OUTAGE CEN-129(tt)-NP L
RECEIVED JUN 31980 f1 ARCH 24. 1980
,,,,, components Gro'ap Yaraca Atomic Electric Con:p:ny 8006200 #24
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o LEGAL NOTICE THIS REFORT WAS PREPARED AS AN ACCOUNT OF WORK SPONSORED BY COMBUSTION ENGINEERING, INC. NEITliER CO.'.CUSTION ENGINEERING NOR ANY PERSON ACTING ON ITS DEHALF:
A.
MAKES ANY WARRAflTY OR REPRESENTATION, EXPRESS OR -
IMPLIED INCLUDING THE WARRANTIES OF FITilESS FOR A PARTICUI.AR PURPOSE - OR MERCIIANTAGILITY,. WITH RESPECT TO THE ACCU 3ACY, COMPLETEtJESS, OR USEFULNESS OF Tile INFORMATION CONTAli.*ED IN THIS REPORT, OR THAT THE USE OF ANY INFORT.1ATION, APPAR ATUS, METilOD, OR PROCESS DISCLOSED IN THIS REPORT MAY NOT Ji! FRINGE PRIVATELY OWNED RIGitTS;OR B. ASSUMES ATJY LIABILITIES WITil RESPECT TO THE USE OF,OR FOR DAMAGES RESULTING FROM THE USE OF, ANY INFOR!/.ATIOtl, APPARATUS, f.'.ETitOD OR PROCESS D:SCLOSED IN Tills TIEPORT.
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4 END OF CYCLE 4 FUEL AtID CEA EDDY CURRENT IllSPECTION REPORT 1980 MAINE YANKEE REFUELING OUTAGE This report summarizes the results of the eddy current test
- data taken at the 198011aine Yankee Outage for CEA Guide Tube Wear, CEA Guide Tube Crimp Size, and CEA Finger ilcar.
CEA and fuel assembly core locations for Cycle 4 are given in Figures I and II of this report.
.CEA GUIDE TUBE HEAR
)testassenblies, were tested for guide tube wear in accordance with approved C-E procedures.
Fuel assemblies pve[
and, assemblies
) ave The maximum reading obtained as a result of the e?dycurrenttestingwa(
]indicatingthatnodetectableCEAguide tube wear has occurred in these test assemblies.
These assenblies were in core locations documented as relatively low wear areas from previous wear test data.
CEA GUIDE TUBE CRi..r> SIZES
~
33atch G fuel assemblies tested for guide tube crimp size, Of the
[
, equired recrinping of all guide tubes._ Initial crimp sizes of r
these bundles ranged from, Recrimping and eddy current testing of these assemblies were performed in accordance with approved C-E procedures,.with all resulting recrimps ranging fro (
Thesesame(
, all located under CEAs during Cycle 4, showed no detectable sleeve wear.
It should be noted that although the eddy current procedure used is specifically designed for evaluating guide tube crimp size, the test method is capable of detecting sleeve wear to a mininun of,-
3 i
CEA FINGE_RJEAR Eddy current testing was performed on;
,CEA assemblics at 11aine Yankee during the January 1980 refueling outage.
The testing was perfomed in accordance with
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approved C-E procedure's for the detection of wear _at_the[
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7 and for wear caused by J ifa the sleeves. The lower portion of each CEA finger was inspected with
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an eddy current coil.
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types of CEA assenblies were tested.
CEA assepbliest
,are the full length, full strength standard CEAs using 5 C pellets.
CEA assemblics 4
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'fare full length, reduced strength CEAs using stainless steel slugs in place of the B C pellets in the four outer fingers.
L' ear sig-4 nals were observed on all CEAs tested with the most significant wear appearing 9
,in the ran e of f
j rom the tip of the fingers.
The signal and location estimates are sur.carized in Table I.
Thesignal[
were corr. pared to those obtained from testing a CEA wear standard with I
3achinedwearsimulations.
A description of the wear standardandthecorrespondingsignal[
is given in Table II.
Note that thesigna{
] depends upon the circuraferential extent and depth of the wear pattern.
Consequently, the signal {
]
The average wear signal indication, per CEA assembly, ranges fro [
) This range corresponds approxicately to a ine oogree or wear on a control rod is acceptable for continued operation, if the ET data indicates that the wear is not more severe than a maxirum wear depth I
of with a'n It shoul_ci be noted that L
_, as located in core positior[
jwhich has been prior to Cycle 4, CEA[
w documented as a relatively high wear (guide tube) location from previous wear testing.
Refer to Figure III for high wear locations.
The correlation used in this cddy current analysis assirges that the signal is attributed of the CEA finger.
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leading to some, j
4.
of the actual wear.
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P TAlli.E I MAINE YAlfr,EE CEA NEAR.I.E..STIl1.G..RES.U.I.T..S.
CEA J(o_._
Results I.oca t.io n
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. TAB L E__I.
(continued)
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-CEA tio.
Resu1Ls Location i
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TABl.E I (C0!? fill 0ED)
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CEA flo.
Results
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_...... =.
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TABl.E II CORRELATION:
ET Signal
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Si9nal.'.
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MAINE' YANKEE CYCLE 4 I
TUEL ASSElGLY LOCATION
( )"(G" assemblicstesied(( test'assemblics ( '] ~ Indicates 'G' Assembly No. XXX Indicates unicss otherhise annotateo. J f CEA location 1 '4 i ^ 1 i j l \\ 1 J 1 ] FIGURE I .a w .-m
.-.m.. ~ ', 11AltiE yid;KEE CEA 1.0CATIOlS CYCL.E 4 -r CEAs P11Jti H0 Rill -- _p q = w_ O O l ) i h -t l 1 l 1 1 1 e 9 4 e F li'.lWE I I J ~ y .,-,-g -,m m m .,e,-, ..,--r,,-..++.,w.,.
~- \\ IMll!E YA!!Kl.E lilGil'!! EAR LOCA110'!S CYCLE I, IA. Afl011 StE!ARY NOTE: I Ratio =Asycopjy,,,Av3.Er[,,,].} liiijh !! car CoreAvg.LI[ i.oca tions ~ ~ ~ ~ R,i tio ' >J. 50. e e . l I i 4 0 l 's 1 i l a a i e 4 4 9 A .mme I FIGURE !!! I ?
.p, u ...,~.4... ...... ~.. - ~.... g ,e,. w.s.-e --e e e, a 4-*e { c I D Y~ l. 7' O t 7 8 -e e f e 0 h 7 e 4 3 3 - -}}