ML20236F217
| ML20236F217 | |
| Person / Time | |
|---|---|
| Site: | North Anna  |
| Issue date: | 10/26/1987 |
| From: | Stewart W VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.) |
| To: | NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM) |
| References | |
| 87-474E, NUDOCS 8711020048 | |
| Download: ML20236F217 (5) | |
Text
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NucLetam opumarsons : +, ) . United States' Nuclear Regulatory Commissions
- Serial No.
87-474E. ' Attention: Document Control Desk- 'N0/FPB- ~ 1 Washington, D.' C.'._ 20555 Docket No' .50-338 License No'. NPF-4 .a Centlemen:-- ry Virginia Elr.ctric and Power Company. C North Anna Power-Station Unit 1-y
- O Steam Generator Tube Plugging Report Supplement i
3.-, t .As requested _:by'~ the' NRC Project-Manager, the attached information'regarding preventive' plugging'of Unit 1 steam generator tubes is provided. .-If you require further'information, please. feel free to contact me. Very truly yours, rq- - k, - ] W. L.-Stewart ~ Attachment c )- -cc: .U.S. Nuclear Regulatory Commisssion 101 Marietta Street, N.W. j Suite 2900 i Atlanta, CA 30323 Mr. J.'L. Caldwell NRC Senior Resident Inspector g$f North Anna. Power Station I l ( 8711020048 371026 DR ADOCK 05000338 p PDR l = _
t. e i Steam Generator "A" The following. table lists those tubes which were preventively plugged with a Sentinel plug on the cold leg side and a solid mechanical plug on the hot leg ? side. I Row Column Row Column 9 2 9 45 10 10 45 8 3 9 46 10 3 10 46 I 11 3 11 46 12 3 9 47 13 3 10 47 8 4 11' 47 l 10 4. 9 48 11 4 10 52 i 10 5 11 52 11 5 12 52 10 7 .10 53 11 7 12 53 10 8 9 54 11 8 10 54 ) 9 14 11 54 9 24 12 54 9 32 9 59 10 32 10 59 10 33 11 59 9' 35 9 60 10 35 11 60 10 36 9 61 10 37 10 61 11 37 11 61 9 38 9 66 10 38 10 72 11 38 10 73 10 39 10 76 11 39 10 77 9 40 10 78 10 40 11 78 11 40 12 78 9 41 10 79 10 41 11 79 11 41 12 79 9 42 10 93 9 43 11 93 10 44 12 93
L i Steam Generator "B"' The following table; lists those tubes which were preventively plugged with a' Sentinel ' plug'. on the cold leg side and a solid mechanica1' plug on the'. hot leg side. R_ow Column 'i 10 2 l 11 2-l 11 3 12 3 'I 13 3 9 23 9, 30 9 34 9 44 10 93 I '11 93 12 93 -l ) I J I i ) i l 1
- Steam Generator "C" The following table lists those tubes which were preventively plugged with a p Sentinel' plug on the cold leg side and a solid mechanical plug on the hot leg j side. Row Column Row Column 10 2 11 30 11 2 9 31 12 2 10 31 10 3 11 31 10 4 10 32 10 5 11 32 10 6 9 37 v 9 15 9 42 9 17 9 44 10 18 9 45 9 19 10 ^5 10 19 9 46 10 20 10 46 10 22 9 47 10 23 10 47 9 24 10 48 10 24 9 49 11 24 9 56 9 25 9 61 10 25 9 63 11 25 9 64 10 26 9 65 11 26 9 66 10 27 9 67 9 28 9 68 10 28 9 75 10 29 10 93 9 30 11 93 10 30 12 93 Q! ___m.m._m-______. _._.-___.__--._______m.
y j -l.' t Stenin Generator "C" L The tubes listed in the following table were preventively plugged (Sentinel ~ plug 'on cold leg side and solid mechanical. plug on hot leg side) in association 'with the' stabilization of the failed tube in Steam Generator C (Row 9 Column 51)' Two tubes in addition to the failed tube (Row 10, Column 51 and Row 11, Column 51) were plugged with solid mechanical plugs due to eddy current j ' indications. Row Column ) Sentinel' Plug 8 50 Sentinel Plug 9 50 i Sentinel-Plug 10 50 Sentinel Plug 11 50 1 Sentinei Plug 12 50 Sentinel Plug 8 51 Sentinel' Plug ~ 10 51 l ' Sentinel Plug 8 52 i Sentinel Plug 9 52 l Sentinel Plug 10 52 l Sentinel Plug 11 52 l Sentinel Plug 12 52 k l Solid Mechanical Plug 9 51 i Solid Mechanical Plug 10 51 i Solid Mechanical Plug 11 51 f i i i 1 - - _ _. _}}