ML20115J630
| ML20115J630 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 04/17/1985 |
| From: | Shell R TENNESSEE VALLEY AUTHORITY |
| To: | Adensam E Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8504240050 | |
| Download: ML20115J630 (10) | |
Text
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b TENNESSEE VALLEY AUTHORITY CH ATTANOOGA. TENNESSEE 37401 1630 Chestnut Street Tower II April 17, 1985 Director of Nuclear Reactor Regulation Attention:
Ms. E. Adensam, Chief Licensing Branch No. 4 Division of Licensing U.S. Nuclear Regulatory Commission Washington, D.C.
20555
Dear Ms. Adensas:
In the Matter of
)
Docket No.
50-327 Tennessee Valley Authority
)
In accordance with the requirements of the Sequoyah Nuclear Plant Technical Specification 4.4.5.5, enclosed are the results of the steam generator tube inservice inspection completed on unit 1 in April 1984.
If you have any questions concerning this matter, please get in touch with Jerry Wills at FTS 858-2683 Very truly yours, TENNESSEE VALLEY AUTHORITY e
R. H. Shell Nuclear Engineer Sworn d subscr ed bergre me this
-wiay of a b 1985 l))>hA Notary Tubile g
My Commission Expires A_ -
Enclosure cc (Enclosure):
U.S. Nuclear Regulatory Commission Region II Attn:
Dr. J. Nelson Grace, Regional Administrator 101 Marietta Street, NW, Suite 2900 Atlanta, Georgia 30323 Mr. Carl Stahle Sequoyah Project Manager U.S. Nuclear Regulatory Commission 7920 Norfolk Avenue Bethesda, Maryland 20814 gaggm'(g7 A(l 0
An Equal Opportunity Employer
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SEQUOYAH UNIT 1 CYCLE 2 STEAM CENERATOR INSPECTION RESULTS Contents Table 1 Inspection Summary Table 2 Steam Generator 2 Inspection Summary Table 3 Steam Generator 3 Inspection Summary Table 4 Steam Generator-4 Inspection Su= mary Table 5 Steam Generator 4 Denting Summary Table 6 Steam Generator 4 Denting Size and Location Summary Figure 1 Dent Size Frequency Distribution for 1981, 1982, and 1984 Tests of Steam Generator 4 i
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l Table 1 Sequoyah Unit 1 Cycle 2 Steam Generator Inspection Summary S/G 2 S/G 3 S/G 4 Tubes-Inspected 240 240 Non-ASME Code Inspections 188 241 315 Tubes Recording 40% Wall Loss & Greater 0
0 0
Degraded Tubes 0
0 0
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af Table 2 Sequoyah Unit 1
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Cycle 2 Steam Generator 2 Inspection Summary Tubes. Inspected for ASME Code Examination 240 Non-ASME Code Required Row I and Row 2 U-Bend Tubes Tested 188 Tubes Recording Pluggable Defects
( t. 40% Wall Loss) 0 Tubes Recording Degradation
( $_ 20% Wall Loss) 0 s
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Table 3 Sequoyah Unit 1 Cycle 2 Steam Generator 3 Inspection Summary Tubes Inspected for ASME Code Examination 240 Non-ASME Code Required Row I and Row 2 U-Bend Tubes Tested 188 Non-ASME Code Tubes Tested with 8 x 1 Probe for Tubesheet Transition
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Area Defects 53 Tubes Recording Pluggable Defects ($_40% Wall Loss) 0 Tubes Recording Degradation
-(s.20% Wall Loss) 0 6
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s Table 4 Sequoyah Unit 1 Cycle 2 Steam Generator 4 Inspection Summary Non-ASME Code Tubes Tested 307 Non-ASME Code Row 1 U-Bend Tubes Tested 8
Tubes Recording Pluggable Defects (-140% Wall Loss) 0 Tubes Recording Degradation (c_20% Wall loss) 0 P
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p Table 5
SUMMARY
OF DENT ('NALYSIS PLANT:SEQUOYAH UNIT ft 1 SG 4 4 HOT LEG ttARCH/19S4 DENT SIZE TOTAL NUMBER OF DENTED INTERSECTIONS (MILS)
NO.
TSP 1-TSP 2 TSP 3 TSP 4 TSP 5 TSP 6 TSP 7
_ = - - - - = _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _. _ _ _ _ _ _ _ _
20+
7 7
0 0
0 0
0 0
16-20 16 13 0
0 1
0 0
0 11-15 95 37 13 30 15 0
0 0
1-1,0*
443 81 68 78 77 53 51 30 0
356 25 45 16 33 63 75 94 TUBES INSPECTED:
163 INTERSECTIONS INSPECTED:
917 TUBES DENTED:
151 INTERSECTIONS DENTED:
561 Intersections with dent initiation and/or magnetite buildup.
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.1 TABLE 6 TUBES RECORDING DENTS AT TUSE SUPPORT PLATE INTERSECTIONS EQUAL TO OR GREATER THAN 11 MILS PLANT: SEQUOYAH UNIT H 1 SG # 4 HOT LEG MARCH /1984 TUBE DENT SIZE (MILS)
~
ROW COL TSP 1 TSP O TSP 0 TSP 4 T
_________________________________________________SP 5 1
11 9
5 10 7
0 0
~
1 10 13 4
17 17 0
6 0
l*
1 16 15 7
8 7
6 0
0 1
21 10 10 10 14 0
0 0
g 1
24 14 7
to 11 8
0 0
-(g 1
26 12 9
0 4
6 6
0 h.
1 29 14 7
11 6
0 5
0 1
1
~1 9
8 14 11 0
V 7
1 36 15 0
7 9
7 0
0 1
56 4
4 0
10 5
6 0
4-1 81 12 6
6 7
5 0
0 1
86 10 6
7 6
7 0
6 O
1 92 11 0
0 7
0 0
7 4
94 11 99 99 99 99 99 99 5
10 21
'O O
S 7
0 0
5 5
21 17 4
7 7
10 0
99 4
5 26 01 11 10 10 5
0 0
f 5
29 01 9.
10 10 7
5 0
5 33 10 7
15 15 9
0 S
5 41 15 0
10 0
7 7
0 5
56 6
79 11
'O O
O O
5 61 11 0
11 11 0
7 0
9 11 01 11 15 9
0 4
7 9
10 15 8
10 0
0 0
0
. 9 17 17 9 0 9 6 0 0 9 21 20 11 10 5 0 7 6 'O 9 25 9 4 11 4 7 0 7 - r-9 26 01 6 11 5 0 7 0 W '. 9 29 15 7 10 5 5 0 0 4ti 9 30 16 6 14 10 6 4 6 9,f,; ;. 9 37 20 0 11 10 7 0 3 9 56 11 7 11 5 0 5 6 [' 9 81 10 0 6 5 6 5 0 10 11 17 5 14 0 0 0 0 10 01 10 14 10 11 10 4 7 10 06 16 7 0 10 7-0 0 10 41 le 10 7 0 7 6 7 10 47 1.h 15 12 7 0 7 7 1 51 15 3 4 3 7 4 5 10 56 14 10 7 7 o 7 0 fl0TE: DENT SI:'E=99 Irl01 CATES fl0 DATA FOR Ifi f ERSEC T10tl 2.7' , ; jg*g ~ * ' " gmt; .. ;w~. :. ' ~ ~ ~ -
r 1 4 ,2 TABLE 6 cont'd TUBES RECORDING DENTS AT TUBE SUPPORT PLATE INTERSECTIONS EQUAL TO OR GREATER THAN 11 MILS ,tn e PLANT: SEQUOYAH UNIT # 1 SG # 4 HOT LEG MARCH /1984 .h TUBE k DENT SIZE (MILS) ROW COL TSP 1 TSP 2 TSP 3 _______________________________________3 TSP 4 TSP 5 TSP 6 TSP 7 r 13 61 12 0 13 G 0 6 6 0 13 92 11 5 99 99 99 99 99 I 17 11 21 10 8 7 0 3 0 Y 17 31 9 10 13 9 7 4 0 d 17 36 11 11 12 6 5 0 4 [l 17 41 17 7 11 7 7 6 0 17 51 13 6 6 5 6 5 5 f, 17 56 10 10 17 7 0 0 0 y 21 22 20 7 13 0 0 0 0 i' 21 26 12 9 6 f' 21 36 11 3 7 11 6 6 9 ( 21 41 18 7 9 11 0 0 0 m 21 46 11 7 7 0 0 0 0 M 25 31 9 4 11 5 0 5 6 25 36 13 12 0 6 0 3 0 25 51 0 11 7 5 7 5 4 3' 25 56 14 9 8 0 0 0 0 3 25 61 9 11 6 to O e 0 25 71 10 0 7 0 7 0 a 29 ~1 14 7 11 6 7 5 0 29 36 12 0 13 1 O O O 29 41 13 0 6 11 0 0 0 29 51 11 0 6 0 0 e 0 29 56 . 7
- 7 12 0
0 0 0 i 33 16 15 ,' 0 5 o 0 0 j ; 33 31 16 0 11 0 0 0 0 33 51 9 0 11-5 0 5 0 33 56 12 0 5 0 6 0 6 33 71 6 11 7 6 0 0 0 41 41 9 12 3 6 0 0 0 'e 41 69 13 6 6 6 5 0 0 NOTE: DENT SIZE =99 INDICATES NO DATA FOR INTERSECTION I I 6 0 0*
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.,, :.~. DENT SIZE FREQUENCY DISTRIBUTIOfJ FREOUENCY (%) DENT SIZE 20 40 60 80 too (mils) + i !m!!!!..!!.!.!!...a..!!.!.!!...... 555 .:. =.;.a..u.,".. _......u.m! 4 4. 2 % !U it !!!!!!!!!!!, n diRWilsiMNf!!MMTRW!Wi!!!@fM!] 42.8% ut.m.,. _ :m. :-, 40.2% 3 g i tili!!4!!!!!!!!H!!It w i diy!!!iWHp;Hi T 'j!ii;Ht!!;$y4!!Ul!Gd 47,;g i !!m 'iiiini !!!! 46.2% 1-10 Jhij5!i; I'W h 49.4% I f 7.7%
- gighl 11-15 7.9%
M 8.3% b [ 1.3% 16-20 1.5% l 1 j 1.5% m... I i O.6% 20+ 0.6% 0.6% i jj""*Hi!!! !!j PLANT:SEQUOYAH UNIT # 1 SG# 4 HQT LEG SEPT /1981 TOTAL SAMPLE = 684 IrlTERSECTIOtJS ItJSFECTED P W ] PLANT SEQUOYAH Uti!Tu 1 SG4 4 HOT LEG
- SEPT /1990 TOTAL SAMFLE= 6G5 IrlTERSECTIONS ItJSPECTED g PLAtJT:SEQUOYAH UNITD 1
SGn 4 HOT LEG MAR /1984 TOTAL SAMFLE= 634 IrlTERSECTIONS ItJSPECTED FIGURE ( .,...a. . :~r ...,.Tu w s M asA d " *~ y k.st. ,.;.;u -r.a,na,,c <., n&......,;;,v'n'"dl>~. w.uq ^ = ^ - .}}