ML20086A078
| ML20086A078 | |
| Person / Time | |
|---|---|
| Site: | LaSalle  |
| Issue date: | 09/06/1991 |
| From: | Piet P COMMONWEALTH EDISON CO. |
| To: | Murley T NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM), Office of Nuclear Reactor Regulation |
| References | |
| IEB-90-002, IEB-90-2, NUDOCS 9111180230 | |
| Download: ML20086A078 (19) | |
Text
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((
O) 1400 Opus Place C:mm nwealth Edit'on O
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Downus Grove,. ittinola 60515, _
, September 6,_1991 4
Or. Th_omaslE. Hurley, Director-Office of< Nuclear Reactor Regulation U.S. Nucleat Regulatory Comisston
~
Washington. 0.C.
20555 m.
Attn:
Document Control Desk
Subject:
-LaSalle County Nuclear Power Station Unit 2 fuel Channel Evaluation for LaSalle Unit 2 Cycle 5 i
NRC_Docht.t_Hom.50-311 1
References:
(a)
M. Richter (CECO) letter to USHRC, dated April-26, 1990.
(b) - M. Richter (CECO) _ letter to USNRC,. dated January 7, 1991, transmitting Comonwealth Edison's (CECO) fuel Channel Evaluation for LaSalle Unit 1 Cycle 5.
(c)
-J. Hickman (USNRC) letter to T. Kovach (CECO), dated February 28, 1991; transmitting the USNRC Safety Evaluation for LaSalle Unit 1 - Fuel Channel Evaluation for Cycle 5 (TAC NO. 79439).
' (d) Conference call on June 20, 1991, between CECO (P. Piet, et al.) and NRR (B. Siegel, L. Phillips. A. Attard).
t-Dr. Murley:
NRC Bulletin 90-02 requested tha't all Boiling Water Reactor (BHR)
_ licensees _ address the effect of fuei channel bow on thermal margins in BHRs,
-particularly the bow of channels that are.being reused for a second bundle
-lifetime.
Reference (a) provided CECO's response to the Bulletin for LaSalle CountyLStation.
The response indicated that although CECO.no longer places 1rradiated~ channels on new/ fresh fuel assembilfs, previous-channel management practices included the reuse of: channels. Consequently, LaSalle Unit 2
- Cycle 5 (presently scheduled to begin on April 4,- 1992).will utilizet-someJuel.
channels _ which had been previously installed on-other fuel bundlesE(fotJa7
~
- single operating cycle).- In a recent teleconferenct with the'NRR Rea'ctor Systems Branch-(Reference (d))," CECO comitted to provide a discussion regarding the ~ actions that.are being.taken to. account for the -impact of these residual reused channels fo'r t.aSalle'2 Cycle 5.
Attachment A to this. letter presents-the evaluation performed by CECO to.. address the thermal margin impact of-the residual reused channels during Cycle 5.1This evaluation is based on the results of the LaSalle.1 Cycle 5
- analysis which was submitted to the NRC in Reference (b) and-approved in.
Reference (c).
CECO has taken additional measures (as discussed in Attachment-A) to provide assurance that the. residual reused channels will have no impact on safety margins.
CECO believes these measures are responsive to concerns expressed by your staff during discussions preceding the Reference (b) submittal and Reference (c) safety evaluation. One of the measures being taken-ts the conservative replacement of any interior reused channels located in potentially 9111180230 910906 4k i
PDR ADOCK 05000374 O
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ZNLD/1175/1-
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1 U.S.. Nuclear Regulatory Commissioni,
Septetber 6, 1991 4
limiting locations of.the core.. The remaining reused channels-are-loaded on-assemblles near the core' periphery and are projected to have substantial margin to limits.-lThis analysis was supported by General Electric in Attachment B.
Please direct any questions or ccenents concerning this letter to
. this office.
Respectfully, I
i Peter L. Piet Nuclear Licensing Administrator Attachments: A.
Evaluation of Residual Reused Channels on Thermal Margins for LaSalle 2 Cycle 5.
B.
General Electric Concurrence - LaSalle Unit 2 Cycle.5 Channel Bow Evaluation Results.
cc:
A.B. Davis - Regional Administrator, Region III B.L.-Siegel - Project Manager, NRR
.L.E. Phillips - Reactor Systems Branch, NRR
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A.C. Attard'- Reactor Systems Branch, NRR -
1 T. Tongue - Senior Resident Inspector, laSalle i~
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i AUACHMENLA Evaluation of Residual Reused Channels on Thermal Margins for LaSalle 2 Cycle 5 BACKGRCWD Commonwealth Edison's (CECO) response to NRC Bulletin 90-02 for its Bolling Water Reactors (BHR) was presented in Reference 1.
In Reference 1 Ceco Indicated that although CECO no longer places irradiated fuel channels on fresh fuel assemblies, previous channel management practices included the reuse of channels. As a result, channels from the-LaSalle County Station initial core discharge batch were placed on approximately half of the fresh-fuel assemblies that were loaded in _LaSalle 2 Cycle 2 and LaSalle 2 Cycle 3 (Reference 1).
These channels had received a single cycle of irradiation, yielding channel exposures from 4 to 14 GHD/HTV, prior to their placement on the LaSalle 2 Cycle 2 and LaSalle 2 Cycle 3 reload fuel. Assemblies from these two reloads continue to be resident in the projected LaSalle 2 Cycle 5 loading.
Channel bow is primartly caused by differential neutron flux across the fuel lattice. C-lattice plants, such as LaSalle County Station, have uniform water gaps around the assemblies and hence experience less channel how as a function of exposure relative to comparable D-lattice plants.
This leads to a smaller impact on local peaking, Minimum Critical Power Ratio (HCPR) and Linear Heat Generation Rate (LHGR) margins as a result-of channel bow for C-lattice plants.
PROJECTED LASALLE 2 CYCLE _5 CHANNEL CONFIGURAT10H The projected-LaSalle 2 Cycle 5 core configuration is shown in Figure 1.
- Figure I shows-the location of the reused channels, the end of Cycle 5 projected channel exposure, and-the end of Cycle 5 projected fuel assembly exposure.
The assemblies with reused channels are listed in Table 1 in order of J.
decreasing end of. Cycle 5 channel exposure.
The Cycle 5 exposure projections shown in Figure 1 and Table 1 are based on L
l.
nominal projected LaSalle 2 Cycle 4 and LaSalle 2 Cycle 5 exposures.
LaSalle 2 l
Cycle 4 has been operating at a higher capacity factor than was assumed in the cal.culation of the nominal Cycle 4 exposure; therefore,-the end of Cycle 5 7
exposure may be111ghtly greater than that shown in figure 1.
This exposure l
Increment (estimated to be approximately 0.7 GHD/HTU) will have a negligible impact on the' discussion herein.
As shown in-Figure 1, the fuel assemblies with reused channels are loaded primarily on the core periphery.
Edison nuclear design engineers deliberately chose this strategy to minimize the number of residual reused channels in l~
limiting, high-power locations while maintaining core symmetry.
As a result, l
149 assemblies which had received reused channels when they were originally
-loaded will remain in LaSalle 2 Cycle 5 and eighteen (18) channels will be L
replaced.
The locations of the-rechanneled assemblies are depicted "New l
Channel" in the Figure I core map.
ZNLD/1175/3
AUACEMEHLAtontinuedl The maximum projected channel exposure at the end of dycle 5' is 48 GHD/HTU, significantly below the maximum channel exposure of 54 GHD/HTU which was used in GE's generic channel. bow analysis (Reference 2).
CliAlmELB0H ANALYSISJEIB00 General Electric performed a cycle-specific analysis for the residual reused channels for LaSalle 1 Cycle 5.
This was evaluated and submitted by CECO to the NRC in Reference 3 and approved by the NRC in Reference 4.
The cycle-specific analysis was required due to the number of reused channels in central, limiting locations.
The exposure history of the reused channels present in the LaSalle 1 Cycle 5 core were evaluated to determine appropriate CPR R-factor bow value adjustments.
R-factors are a location-weighted function of the local pin powers in a bundle.
The LaSalle 1 Cycle 5 evaluation was only performed for reused channels which were present on the interior, limiting assemblies. Cells which are located within four (4) rows of the core periphery were not included due to the large degree of margin in these low power regions.
To reduce the number of reused channels in the LaSalle 2 Cycle 5 core, CECO conservatively decided to replace any reused channels which remain in the interior, potentially limiting locations of the core.
The assemblies which will be rechanneled are shown in figure I J,nd Table 1.
Figure 1 identifies the locations of the assemblies wh1 4: W Fl be rechanneled; Table i lists the channel exposure of these assemblies if they were not rechanneled prior to Cycle 5 operation.
The peripheral cells are projected to have at least 30% margin to the HCPR Operating Limit and at least 20% margin to the LHGR Limit at the most Ilmiting point in the cycle. Therefore, consistent with the LaSalle 1 Cycle 5 analysis and evaluation, these assemblies will not be rechanneled or analyzed specifically due to their substantial margin to thermal limits.
R.EACIORlDES1HMI Since there will be no reused channels in the interior, potentially limiting area of the core, and the maximum projected end of Cycle 5 channel _ exposure is less than 50 GHD/HTU, the appilcation of the NRC-approved GE core a'vera'ge bow methodology for single bundle channels (Reference 2) is appropriate. CECO will apply an R-factor set consistent with this method. GE has concurred with th1y conclusion as shown in Attachment B.
~
MCP_R_SAEEILI.lH11 A potential impact of channel bow is an increase in the MCPR Safety Limit due to increased measurement uncertainties.
GE evaluated the spread in channel bow data for the laSalle 1 Cycle 5 core loading in Reference 3.
GE's evaluation concluded that the variations in the channel bow data was within the tolerances used in their generic methodology (Reference 2); therefore, there was no impact on the HCPR Safety Limit. Since the LaSalle 1 Cycle 5 loading bounds the LaSalle 2 Cycle 5 loading in terms of number and exposure of reused channels, no adjustment to the MCPR Safety Limit is required to ensure fuel cladding integrity. GE has concurred with CECO's conclusion as stated in Attachment B.
ZNLD/1175/4 Page A-2 k
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' KliAQlEttLA iceatinuedl-COELUS10!i The previous single _ cycle.of exposure on the remaining 131 reused channels does not present a challenge to the LHGR limit, the-HCPR Operating Limit, or the MCPR Safety Limit.
These channels will be loaded into non-limiting l_ocations of the laSalle 2 Cycle 5 core.
During cycle operation, all assemblies in the core will be modeled.using an R-factor adjustment strategy consistent with the GE generic channel bow methodology.
These steps will ensure that the MCPR Safety limit is protected throughout LaSalle 2 Cycle 5 even in the event of a limiting Abnormal Operating Occurrence.
As indicated in the Reference i response to NRC Bulletin 90-02, CECO has discontinued the previous practice of channeling fresh fuel with previously irradiated channels and is committed to assuring that any residual reused
- channels will have no impact on safety. CECO anticipates that all residual reused channels will be completely discharged by the end of Cycle 7.on Unit I and the end of Cycle 6 on Unit 2.
Until that time, CECO will continue to minimize the number of remaining reused channels during core loading development. Any remaining reused channels which are located in an
- interior, potentially -11miting area of the core will be replaced.
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Page A-3 ZNLD/il75/5
AIIACHMLNT;A.(coullautdl-1 REEERENCESL l
1.-
Letter from' H.H. Richter to the U.S. Nuclear Regulatory Cccentssion.
)
- Dresden Station Units 2 and 3. Quad Cities Units-1 and 2 LaSalle County
-Station Units 1 and 2 - Response to NRC Bullettfl 90-02.NRC Docket Mos.
50-237/249, 50-254/265, 50-373/374," April 26, 1990.
2.
Letter from P.M. Harriott (GE) to T.E. Hurley (USNRC), " Fuel Channel ow, August 22, 1989.
B
-- 3.
Letter from M.H. Richter to U.S. Nuclear Regulatory Commission, "LaSalle County Nuclear Power Station Unit 1 - Fuel Channel Evaluation for LaSalle 1 Cycle 5,_NRL Docket No 50-373," January 7, 1991.
-1 4.
Letter from ~J.B.- Hickman (USNRC) to T.J. Kovach (CECO), " Safety Evaluation for laSalle Unit 1 Fuel Channel Evaluation for Cycle 5 (TAC No. 79439),"
February 28, 1991.
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e Figure 1
' LaSalle 2 Cycle 5 Core Configuration 1
The attached figure shows the location of the residual reused channels in
. LaSalle 2 Cycle 5.
Control cell locations are identified for reference purposes.-
The information included for each reused channel is as follows:
1.YJ553 - Assembly Identification 42.
- Channel Projected End of Cycle Exposure, GWD/MTU 29.
- Fuel Assembly Projected End of_ Cycle Exposure, GWD/MTU Core locations which do have a reused channel are marked "N/R' for Not Reused.
Assemblies which will receive a new channel are so indicated.
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Page A-5
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Figure 1, Continued (ab, lie 2 Cycle 5CoreConfiguration 1
2 3
4 6
7 8
9 10 11 13 14 15 LYF357 LYT 400 LYF346 1
n/R N/t 35 36 N/R 37 N/R 31 32 33 LYF339 LYM307 LYM284 LYM311 LYM265 LYM302 LYD81 g
37 41 42 N/R 43 44 39 39 33 la 29 30 31 26 26 3
LYF374 LYM306 LYM293 36 42 N/R 44 N/t N/R N/R N/R N/R N/t 32 29 31 4
LYF416 LYK299 L M 65 42 N/R N/R 40 N/R N/A N/t N/R N/R 44 29 27 31 LYM190 LYM295 42 43 N/R N/R N/R N/R N/R N/I N/t N/R N/t 29 30 6
LYF388 LYF406 LYM266 LYF239 36 32 43 42 N/R N/R N/R N/t N/R N/A N/R N/R N/t 32 29 30 37 7
LYM303 LYF289 42 N/R N/R N/R New N/R N/R N/1 N/R N/t N/A N/R N/t 29 channel LTM274 8
N/R N/R N/R N/R N/R N/t New N/R N/t N/R N/t N/R N/R N/t chantw1
..)
Lyf268 LYM265 LYM2N7 LYM168
'3P N/R 44 40 N/R N/t N/R N/R N/R N/t N/t N/R New N/R N/t 32 31 27 Dani 10
-LYM273 N/R 42 N/R N/R N/R N/R N/R N/R R/R N/R N/R N/t N/t N/R N/R 29 LYMIE3 11 N/R N/R N/R N/R N/R N/R N/1 N/R N/1 N/R N/R N/t N/t N/R Rev channel 12 LYM275 N/R 43 N/R N/R
'N/R N/R N/R N/t N/R N/t N/R N/t N/R N/R N/A 30 13 N/R N/R N/R N/R N/R N/R N/R N/R N/A N/1 N/t N/R N/t N/t N/R 14 N/R N/R N/R N/R N/R N/R N/R N/R N/R N/R N/R N/R N/R N/R N/t 15 LYF279 LYM283 L M 95 37 N/R N/R 44 N/R N/t N/R N/R N/R N/R N/R N/R N/R N/R New Channel 33 31 Page A-6
e Figure 1, Continued LaSalle 2 Cycle 5 Core Configuration 16 17 18 19___
to 21 ft 23 24 25 26
!?
28 t9 30 i
LYFt91 LTF334 LYF375 Lff372 35 37 37 36 N/R t/t N/R 33 33 33 32 2
LYK319 LYM20 LYX335 LYM313 LYM334 LYM315 LYF304 38 39 44 43 N/A 42 41 37 26 26 31 30 29 28 33 3
lyn 31 LYK316 lit 389 N/R N/R N/R N/R N/R R/t 44 R/R 42 35 31 29 12 4
LYM355 LYM325 LYT 407 44 N/R N/R N/9 N/R R/t 40 N/R N/R 33 31 27 29 LYMt?
5 N/A N/A N/R N/R N/R N/R N/t N/R N/R 43 R/3 30 LYM356 LTT397 6
~
M/R N/R N/R N/R N/R R/R N/R N/R
- N/R R/R 43 R/R ' 36 30 12 7
LYM259 LTK3tl M/R N/R N/R N/R N/R N/R N/R N/R N/R N/R 39 N/t 42 26 29 8
LTX348 LIM 263 LTD&51 N/R N/R N/R N/R N/R E/t E/R Raw t/R M/R N/t R/t 40 37 CMarel 27 33 LTM337 LTO34 LTM353 9
N/R N/R N/R N/R N/R R/R R/R N/R A/R R/R N/t 40 44 41 t/t 27 31 ta LTC47 10 N/R N/R N/R N/t N/R R/R RiR N/R N/R R/t R/R N/R t/R 4t R/t 29 11 N/R N/R N/k N/R R/R R/t N/R N/R N/R R/t t/t R/R 3/R R/R I/R 1TC49 12 N/R N/R A/R N/R N/R I/R N/R-N/A N/R t/R N/t N/R t/t 43 R/t 30 LTC43 LTD30 13 N/R N/R N/R N/R N/R R/R N/R N/R N/R R/R R/t N/t R/t 44 46 31 32 LTC44 14 N/R N/R N/R N/R Nfs N/R N/R N/R N/R
. M/R R/R R/R t/R 39 t/R r.
LYKG3 LYM242 LTc57 15 LTM328 New N/R N/R N/R N/R N/R N/R N/R N/R R/R N/R 44 45 39 R/R CMnnel 31 32 26 Page A-7
a m-Figure 1 Continued LaSalle 2 Cycle 5 Core Configuration f
I 2
3 4
5 6
7 8
9 10 11 12 13 14 15 16 LYM292 LM97 R/t n/t R/t 44 N/A R/t N/R 4/t R/t B/t 8/R N/t N/R R/t New channel 31 17 LYF381 LYX281 35 39 N/A N/t N/t R/t N/R N/t s/t s/R s/R n/t n/a n/t n/t 32 26 18 LYF402 LYM282 46 44-R/t N/R N/A N/t N/I N/R I/t I/t R/t N/t N/R R/3 R/t 32 31 19 LYF419 LYM276 36 43 N/R
"/R R/t R/t N/t N/t R/t R/t N/R' N/R N/R 8/R N/t
- 32 30 20 LYF3h5 LYN 165 LYM164 35-N/R N/A N/t. New 5/t N/R N/R N/R R/t B/t N/R N/R R/R New 31 Chanrmt Channel 21 LYT 396 LYM278 33 42 N/t N/R N/R N/t R/t N/A I/R N/R 4/t N/R R/R E/F, N/t -
29 29 -
22 LYF287-LM89 LYM286 36 N/R 44 40 N/R N/A N/A N/R R/t n/t N/A N/R N/A E/R N/t 32 31 27 LYMt11 23 N/t N/t N/t N/t N/t R/B New R/1 N/t R/R N/t N/t R/t N/t Channel 24 LYM104 LYF349 LYMit?-
42 R/t N/R I/t New N/R R/t R/t R/t -
N/t N/A B/t New
.29 Channel
- 5"thannel 25-L M 69-B/t N/R 43 R/R N/t N/t.
R/t E/t N/t N/R N/t R/t I/t 30
~~2 6 ILF382 LYM294 31 43 N/R R/R N/A I/t R/t N/R N/t I/t R/t M
M
+
~ 27
'LYM186' LYM300 LYM270 3/t 41 N/t 40 t/t s/t N/t N/t R/t 44 m
28 27 31 28 LYM309 LYM198 LYM294 R/t 42 40 44 R/R N/R N/t N/R R/t R/t 29 27 31 29 LYM310 LYM291 LYX312 LM90 LYM305 LYK306 N/R 41 42 N/R 43 44 39 39 28 29 30 31 26 26 30 LYr394 LYF354 LYT 282 LYr412 34 33 35 N/A 46 N/t N/A 32 29 31 33 Page A-8
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figure 1, Continued LaSalle 2 Cycle 5. Core. Configuration 16 17 18 19 20 23 24-25 26 27 28 29 30 16 LYK329 LM61 LYK34t LYK358 LYF293 New N/t R/t R/t N/A N/R R/t N/R now X/t R/t 44 R/t 39 37 CNnnel CM nnel 31 16 il LYtt345 LYF376 17 R/t N/R N/t h/R R/t N/R N/R N/R R/t N/t R/t R/R N/t 39 35 26 32 L M 57 LYM346 18
,N/R N/R R/R N/R N/t R/t N/R New R/R N/t 44 R/t N/R-N/t N/R CMnnel 31 LYM350 LYF??3 19
~ N/R N/t E/R R/R R/R N/R N/t 43 35 N/R N/A R/R N/R N/R N/R 30 32 LYF327 20.
N!R d/R N/R N/t N/R N/t R/t N/R R/t R/t N/R R/R N/t N/t 33 31 LYM352 LYF392 21 N/R -
N/R N/R N/t N/R N/R N/t R/R N/t N/t R/R N/R I/R 42 33 29 t$
22 LYM258 LYM338 lyn 39 LYM354 N/t N/A N/R N/R N/R N/R New N/R R/t R/R R/t 39 44 di R/t
{
27 31 28 CNnnel 23 LYM351 LYM264 LYF368 N/R N/R N/R -
N/t N/R N/t N/t New R/t N/t R/R R/R 40 37 CMnnel 27 33 24 LYK322 N/t N/t Ipt R/t N/n R/t N/R n/R s/t s/t n/a n/a 42
~~
.'r 29 25 LYX359 LYF377 LYr393 M/t N/P N/R N/t N/R N/t N/R N/t R/R R/t 43 33 34
.,7,,,.
30 49
.__3_2 -
LYx330
'l l
26
. N/t N/t N/R.
R/R
-- 13 N/t
. N/R N/t 1/t R/t n/R 3.
1 27 LYM360 LYM326
^
t/t R/t 44 R/t N/R R/t N/A N/R. ' 40 N/R 31 27 28 LYK332 LYM317 N/R N/t N/R R/t N/t N/t 44 R/R 42 N/R 31 29 29 LYM324 LYM323 LYM343 LYK314 LYU41 LYK318 l
39 39 44 43 N/R 42 41 N/R 2G 26 31 30 29 28 f
30 ~ LYF284 LYF383 i
37 N/R N/t N/t N/t N/R 35 33 32 Page A-9 l
-c Table 1 List.ing of Assemblies with Reused Channels Assembly Location Exp,GVD/HTU "Y"
if ID I
J Channel Fuel Replace,
LYH258 22 22 47 34 Y
LYF330 30 13 46 32 LYF402 1
18 46 32 LYF412 13 30 46 33 LYH163 15 11 45 32 Y
LYM166 15 20 45 32 Y
LYM187 15 24 45 32 Y
LYM242 28 15 45 32 LYi4257 26 18 45 32 Y
LYM261 24 16 45 32 Y
LYM165 5
20 44 31 LYM265 15 4
44 31 Y
LYM270 15 27 44 31 LYM282 2
18 44 31 LYM283 4
15 44 31 LYM285 13 2
44 31 LYM286 3
9 44 31 i
LYM289 3
22 44 31 LYM290 13 29 44 31 LYM292 4
16 44 31 LYM293 9
3 44 31 LYM294 9
28 44 31 LYM331 22 3
44 31 LYM332 22 28 44 31 LYM333 27 -
15 44 31 LYM335 18 2
44 31 LYM336,
28 9
44 31
' LYM339 28 22 44 31 LYM34,0 18 29 44 31 LYM342 27 16 44 31 LYM343 29 13 44 31 LYM346 29 18 44 31 LYM355 16 4
44 31 LYM360 16 27 44 31 LYH168 13 9
43 30 Y
Page A-10
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- s Table 1, Continued j
Listing of Assemblies with Reused Channels Assembly Location Exp,CWD/MTU
, Y' if 10 I
J Channel fuel Replace,
LYM266 5
6 43 30 LYM269 5
25 43 30 LYM275 2
12 43 30 LYM276 2
19 43 30 LYM295 6
5 43 30 l'
LYM296 W
15 43 30 Y
LYM297 15 16 43 30 Y
LYM298 6
26 43 30 LYM311 12 2
43 30 LYM312 12 29 43 30 LYM313 19 2
43 30 LYM314 19 29 43 30 LYM327 25 5
43 30 LYM328 16 15 43 30 Y
LYM3; 16 16
' 43 30 Y
LYM33 25 26 43 30
[.
LYM349 29 12 43 30 LYM350 29 19 43 30 LYM356 26
- fa 43 30 LYM359 26 25 43 30 LYF239 6
6 42 37 LYF416 6
4 42 29 LYM190 5
5 42 29, LYM273 2
10 42 29 LYM27f 9
8 42 29 Y
42 29 Y
LYMp?
.,,8.
,23, '
41 29 2
21 LYM278 LYH284 10
-2' 42
^ " 19 LYM291 10 29 42 29 LYM303 3
7 42 29 LYM304 3
24 42 29 LYM308 7
3 42 29 LYM309 7
28 42 29 LYM316 24 3
42
~29 LYM317 24 28
, 42 29 w
Page A-Il i.
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Table 1. Continued Listing of Assemblies with Reused Channels
- Assembly location Exp,CWD/MTU
'Y' if 10 1
J Chanael fuel Replace LYM321 28 7
42 29 LYM322 28 24 42 29 LYM334 21 2
42 29 LYM341 21 29 42 29 LYH347 29 10 42 29 LYM348 23 8
42 29 Y
LYM351 23 23-42 29 Y
LYM352 29 21 43 29 LYM186 7
27 41 28 LYM307 9
2 41 28 LYH310 9
29 41 22 LYM315 22 2
41 28 LYK318 22 29 41 28 LYM353 29 9
41 28 LYH354 29 22 41 28 LYM188 8
28 40 27 LYM263 28 8
40 27 LYH264 28 23 40 27 LYM287 4
9 40 27 LYM288 4
22 40 27 LYM299 9
4 40 27 LYM300 9
27 40 27 LYM325 22 4
40 27 LYM326 22 27 40,
27 l.
LYM337 27 9
40' 27
~
LYM259 26 7
39 26
~ ~ ~.
LYM281 2
17 39 26 15 2
39 26 l.
LYM301
~
LYM302 14 2
39 26 l
LYM305 14 29~
39 26 LYM306 15 29 39 26 LYM320 17 2
39 26 LYH323 17 29 39 26 LYM324 16 29 39 26 LYM338 27 22 39 27 LYM344 29 14 39 26
,Page A-12
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o jf Table 1, Continued Listing of Assemblies with Reused Channels
. Assembly location Exp. GWD/MTU
'Y' if 10 1
J Channel fuel Replace LYK345 29 17 39 26 LYM357 29 15 39 26 LYK358 29 16 39 26 LYH319 16 2
38 26 LYF279 1
15 37 33 LYT 284 16 30 37 33 LYF293 30 16 37 33 LYF304 23 2
37 33 LYf336 17 1
37 33 LYF339 8
2 37 33 LYF346 14 1
37 33 LYf365 29 8
37 33 LYF358 29 23 37 33 LYF375 18 1
37 33 LYF287 1
22 36 32 LYF288 1
9 36 32 LYF372 19 1
36 32 LYF374 6
3 36 32 LYF388 3
6 3G 32 LYF393 28 25 36 32 LYF397 28 6
36 32 LYF400 12 1
36 32 LYF419 1
19 36,,
32 LYF282 11 30 35 31 LYF289 7
7 35 31 Y
LYF291 16 l'
35 33 LYF349 1
24 35 31 Y
LYF355
.1 20 35 31 LYF357 11 1
35 31 LYF376
'30 17 35 32 LYF381 1
17 35 32 LYF383 22 30 35 32 LYF389 25 3
35 32 LYF373 30 19 34 32 Page A-13
- Sp
- O e
e
o
- r t
~
y-Table 1, Continued o'"l?
Listing of Assemblies with Reused Channels Assembly Location Exp GW/MTU
'Y' if 10 I
J Channel Fuel Replace LYF394 9
30 34 32 LYF327 30 20 33 31 LYF354 10 30 33 29 LY' 377 27 25 33 29
/
L'if392 30 21 33 29
' YF396.
1-21 33 29 LYF407.
25 4
33 29 LYF406 4
6 32 29 LYF382 5
26 31' 29 f:
a i
":*5
+
~
4 g
. s,.
t:
l L
Page'A-14 l..
1..
1 a
Attactacnt B
~
GE Concurrence -
Evaluation of Residual Reused Channels on Thermal Hargins for LaSalle 2 Cycle 5 O
+
Page B-1
~
CE Nucten Eturigy cm tw< cem r
17$tm
,v Sr.kst CA M 75 a
August 16, 1991 cc8 P. A. Lambert /J. L. Rash REPt91-196 E. G. Leff W. F. Haughton T. P. Shannon J. M. Tortorelli J. T. Worthington i
M. A. Wrightsman Dr. R. J. Chin Nucicar Design Supervisor
-Nuc1 car ruel Services commonwealth Edison company 922 Edison Building
.P.O.
Box 767 hicago, Illinois 60690-9740 SUBJECT L82C05R04 - Channel Bow Analysis REFERENCEt Letter, R. J. Chin to R. E. Parr, "LaSalle 2 Cycle 5 Channel Bow Analysis,' July 17, 1991 Dear Dr. Chint The attached channel bow evaluation results are provided at the request of J. Wieging.
Very t ly yours, R. E. Parr Senior Fuel Project Manager
. Edison Projects M/C 174, (408) 925-6526
, REP:ng l,
[-
Attachment 1
e i
0%NNEL IXW EVALUATION RESULTS
References:
1.
Letter BND 91-OSS, R. J. Chin (CECO) to R. E. Parr (GE), 'LaSalle 2 Cycle 5 Channel Bow Analysis', July l
17, 1991.
2.
Letter P. W. Marrlott (GE) to T. E. Murley-(NRC), ' Fuel f
Channel Bow', August 22, 1989.
3.-
Letter REP 90-259, R. E. Parr (GE) to R. J. Chin (CECO), 'Evaluatlon of the Critical Po.ver impact of Reused Channels for LS1R04C05*, Decenber 19, 1990.
General Electric has evaluated Edison's proposed strategy for
-the residual reused channels.In LaSalle 2 Cycle 5, Reference 1,
and has t he f ol lowi ng ccmnen t s :
R-factor Adjustment gu,, ~.~.~"~ Y ~~~~~~~~~~
Since no reused channels will be resident in the central, potentially limiting locations, and the remaining reused channels wlli have only a single cycle of exposure more than their bundles, the application of the GE core average channel bow methodology, which le described in Reference 2, is appropriate.
MCPR Safety Limit The inpact of the reused channels on ~the MCPR Saf ety Limi t was LaSalle 1 C{erms-of the nunter and locatlon of the reus Reference 3.
- The cle 6 loading bounds the propose loading in channels.
Therefore, the conclusion for LaSalle 1 Cycle 5 namely that there is no inpact on the MCPR Saf ety Limi t due to -
_the presence of the residual reused channels, applies.
a-l L
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