ML19340B005
| ML19340B005 | |
| Person / Time | |
|---|---|
| Site: | Dresden  |
| Issue date: | 07/16/1973 |
| From: | Abel J COMMONWEALTH EDISON CO. |
| To: | Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| Shared Package | |
| ML19340B003 | List: |
| References | |
| NUDOCS 8010170706 | |
| Download: ML19340B005 (6) | |
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July 16, 1973 Mr. Boyce E. G;ier Regional Director
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' Directorate of Regulatory Operations - Region III U.S. Atomic Energy Commission 799 Roosevelt Road Glen Illyn, Illinois 60'137 Subject!% Dresden Station, Units 1 and 3, Docket Mos. 50-10 and 50-249 Regulatory Op~ rations Inspection Report c
No. 50-010/73-02 and No. 50-249/73-03 Pronrietary In formation.^.nnlientic-
Dear Mr. Gricr:
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In res'ponse to your letter of June 27, 1973 con-
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-corning this subject, you are requested to handle certain portions of-your inspection reports as' proprietary informa-tion and withhold from public disclosure as permitted by Title 10, CFR Section 2.790.
4 Our contractor (General Electric Compcny) has determined the information in Report 50-249/73-03, Pages 17, 18and 19 concerning the Dresden Unit 3 fuel inspection is proprietary.
The information contained on these pages
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is of potential benefit to General Electric Company competitors and should not be available to them.
General Electric has gono to great expense to develop fuel inspection methods which allow evaluntion and improvement of their designs.
These methods are nod, to'Gencral Electric's knowledge, presently available to their.. competitors.
The summary of fuel failure data on Pagcc 17-19 would provide competitors an unfair advantage; because similar data on their fuel is not available tJ General Electric.
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EommoMwc;h-n tcason Ce spany a
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Mr. B. H. Grier 2-
-July 16, 1973 Attachment A contains Pages 17, 18 and 19 of the inspection reports which are reque'sted to be withheld as proprietary information.
Very *ruly y urs,
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S. Abel Nuclear Licensing Administrator -
Boiling Water Reactors
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(1) 1 2nric' ht-Enrich:.cnt Failure
'1.2%
80 1.69%
160 1.69% (Tic Reds) 90 2.44%
226 2.44% (Tic Rods) 39 603 (2k"fTestineCriteriafg/c,r[)
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-UT Failure
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?mg 86
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269 0
Negative 61 e :
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603 The locations of the 1' 97 fuel rods with r> c-A C ~5 ;cro+rd---
G u.d positive Y? within the fuel csser.bly is shown below.
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2 1
5 l' { 5 l 0 l 6 2
2 1
1 0
5 1
4 1
1 0
1 0
1 4
1 0
1 2
1 10 2
1 1
0 3
2 24 1
1 1
5 1
3 2
Centrol Rod Blade
,te 2 -l 9 p'.9 l 7 45 0
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- Not tested
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-r-The loc. ions
'the 603 ttjoctcd fuel,.ods v.
cssembly are as' uhoun belo::.
.in the fuel 9
9 7
12 8
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11 l 17 11 8
7 10 6
i 7
9 9
8 5
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9
+ i 12 9
22 l
13 9
0 8
15 13 37 8
7 7
19 9
18 7
Control Rod Blade 13 12 11l26l33l17! 56 l j
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- Kot tectcdD During the -20 and&ce-.ir.s of the fuel rods, defec: cir.cis tsy have been obccrved in more than one cxici location.
The licensee recorded the area where tha highest cignal was observed for ecch rejected rod.
The axial distribution of these " worst" arcss is
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given belcu:
Axici Locc 15n Above Lower End
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Plug (inchec)
M1 Rejected Ecds o..-
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.58 21-30 4
.8 31-40 11 22
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41-50 5
10 51-60 5
10
.n 61-70 6
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A::ia1 L.atinn Abovc hover End" Rods:'di;.h 30%-ET
_Plu3] inches) ar.d-Occiti>c "T All nejected neds 71-30 3
8 81-90 14 23
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91-100*
20 34
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101-110.
19 30 111-120 15 22 121-130 8
13 131-140 11 25 Location not identified 18 77
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187 603 Thelicensec'srecordsindicatedbhatatleast10fuelrodsseparated circur.ferentially.as follow :
(1)
Six fuel rods ceparated at lower end plug.
(2)
One fuel rod separated at appro::imately one-third from lower cnd pluc.
(3)
One fuel rod separated approxicately eight to 12 inches frc=
lower end, plug.
(4)
Two fuel rods separated apprcximately 12 inches fro upper end plug.
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Electrical Sys:c=s - Unit 1
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Unit 1, 125V Sattery
.The licencee's performance of surveillance tests rce.uired by the Technical Specifica:icns was reviewed as noted below:
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PODROHGWAL
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