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;                                                ATTACHMENT 3.
;                                                ATTACHMENT 3.
  ,                              MILLSTONE NUCLEAR POWER STATION, UNIT NO. 2 I&E BULLETIN No. 79-02 I&E. BULLETIN No. 79-14 4-Y
  ,                              MILLSTONE NUCLEAR POWER STATION, UNIT NO. 2 I&E BULLETIN No. 79-02 I&E. BULLETIN No. 79-14 4-Y 1
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Revision as of 13:26, 18 February 2020

Responds to IE Bulletins 79-14 & 79-02 Re Accuracy of Input Info for Seismic Analysis of safety-related Piping & Pipe Support Base Plate Designs W/Concrete Expansion Anchor Bolts on Category I Sys,Respectively.Updates Project Work
ML19330C205
Person / Time
Site: Millstone Dominion icon.png
Issue date: 07/16/1980
From: Counsil W
NORTHEAST NUCLEAR ENERGY CO.
To: Grier B
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
B10036, IEB-79-02, IEB-79-14, NUDOCS 8008080068
Download: ML19330C205 (20)
v • d • e


Text

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NORTHEAST UTILrrIES 1

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  • [$ T NNECTICUT 06101 t L =====

July 16, 1980 Docket No. 50-336 B10036 Mr. Boyce H. Grier, Director Region I Office of Inspection and Enforcement U. S. Nuclear Regulatory Commission 631 Park Avenue King of Prussia, PA 19406

References:

(1) B. H. Grier letter to W. G. Counsil dated July 2, 1979, forwarding I&E Bulletin No. 79-14.

(2) B. H. Grier letter to W. G. Counsil dated August 15, 1979, forwarding I&E Bulletin No. 79-14, Supplement.

(3) B. H. Grier letter to W. G. Counsil dated November 8, 1979, forwarding I&E Bulletin No. 79-02, Revision 2.

(4) W. G. Counsil letter tr B. H. Grier dated December 10, 1979.

(5) W. G. Counsil letter to B. H. Grier dated December 14, 1979.

Gentlemen:

Millstone Nuclear Power Station, Unit No. 2 I&E Bulletin No. 79-14 I&E Bulletin No. 79-02 Reference (1), as supplemented by Reference (2), requested Northeast Nuclear Energy Company (NNECO) to initiate a program to verify the accuracy of input information for seismic analysis of safety-related piping. In Reference (3),

the NRC Staff requested that NNECO provide information regarding pipe support base plate designs using concrete expansion anchor bolts on Category I systems.

This submittal is intended to provide an update of the project work which is presently underway at Millstone Unit No. 2 pureuant to the requirements of I&E Bulletin Nos. 79-14 and 79-02.

In Reference (4), NNECO reported to the Staft efforts which had been expended to walk down concrete block walls to determine the extent to which seismic Category I supports were located on concrete block walls. The block walls originally reported in Reference (4) were located and subsequently verified from plant lay-out and piping drawings. NNECO has since determined that these

, drawings did not fully delineate all potential support locations and certain high radiation areas were not walked down. During the course of verifying piping supports pursuant to the requirements of I&E Bulletin No. 79-14, additional supports utilizing concrete expansion anchor bolts located on block walls were identified. The entire plant was physically walked-down, and 1

8008080068 l 1

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Attachment 1 lists the supports-located on block walls utilizing concrete

-expansion anchor bolts at Millstone Unit No.-2. The updated response to Iten 5 of Reference 1(3) requires a substantial amount of input and will be provided to the Staff on or about August 1,.1980.

Recent developcents at Millstone Unit No. 2 during the review of pipe supports required by I&E Bulletin No. 79-14 have required NNECO to alter the approach

.by which I&E Bulletin Nos. 79-14 and 79-02 will be dispositioned. These develop-ments and the revised course of action are outlined below.

During routine checks ~made to ensure that the support loadings used from the seismic analysis were correctly transmitted to the hanger designers, an error was discovered.' Apparently,' Operating Basis Earthquake (OBE) loads were tabu-lated in the support load summary sheets in the four stress problems noted in Attachment 2.

It was the architect engineering firm's practice at that time to use Design Basis Earthquake (DBE) loads in these tables and the designers incorrectly interpreted the- 0BE loads as DBE loads and applied them to the support structures. A review of all 244 remaining stress problems revealed that these were the only incidences of this type of error.

Since the stress problems relating to the main steam and safety injection systems (Problem Nos~. 13, 26, 48) were being reanalyzed due to I&E Bulletin No. 79-14 concerns, this analysis was accelerated. The loads from the service water problem, since they were available, were inmediately applied in the correct manner to the applicable hanger structure.

It was'further determined that in some instances, the base plates / anchor bolts had factors of safety (FS) less than two. No other major deficiency was found in any of the structural members evaluated.

At this time, the service water system was declared inoperable and the plant was shutdown in accordance with Technical Specifications.

Attachment 3 presents a list of the supports wnich were modified due to the OBE vs. DBE discrepancy. All supports which required repairs now have a FS of four or more on the anchor bolts per the requirements of I&E Bulletin No. 79-02.

Concurrently, _ a conservative screening test of bat e plates was completed.

Minimum bolt embedments, worst-case loading combinations, minimum concrete strengths,

'a'd n similar conservatisms were considered in the screening test.

~

It was originally anticipated that.the results would indicate a large percentage of hangers with FS greater than'four.

The screening test identified 237. hangers with FS less than two.

After eliminating the hangers which were repaired because of the 0BE vs. DBE

- discrepancy, the. number of hangers with FS less than 2 was reduced to 168.

.Since system operability could not be supported without substantial analysis, N

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it was deemed necessary to complete detailed evaluations and hanger modifications as needed prior to plant startup.

Included in Attachment 3 are the details of the results of the support reviews and the subsequent actions taken. All support modifications have been completed and all modified supports in this category (FS less than two) now have a FS greater than four in accordance with Bulletin requirements, with the exception of one.

Support Number 301080 was modified, but due to local interferences and extreme analytical difficulty, the FS could only be raised to between two and four.

A redesign of this support will be accomplished and the support will be upgraded to achieye a FS greater than four during the upcoming summer refueling cutage.

All nonconformances resulting from the testing and inspections to date have been dispositioned. Any hanger identified with a FS less than two has been

' modified to increase the FS to a value above four, with the exception of Support Number 301080 which was discussed previously.

All inspections required by I&E Bulletin No. 79-14 have been completed, as previously reported in Reference (5). All walk-downs and testing required by I&E Bulletin No. 79-02 will be completed by the end of the 1980 refueling outage.

Due to the large number of hangers identified in the preliminary screening tests with a FS between two and four and manpower availability at our supporting architect engineering firm, NNECO has revised the plan of action by which I&E Bulletin Nos.

79-14 and 79-02 will be dispositioned. It is not feasible or practical to complete all design and construction work prior to the end of the 1980 refueling outage.

Accordingly, manpower is being allocated to address those hangers with FS between two and four consistent with this reanalysis effort. The prioritization of systems and work locations are as follows.

Supports in containment on safe shutdown systems (SSS) will be of highest priority, followed by supports outside of containment on SSS. This addresses systems which are most critical to plant reliability and permits the maximum construction activity by spreading work crews throughout the physical plant. Remaining supports in containment will be reviewed neyc, with all other seismic Category I hangers taking the lowest priority.

It is expected that approximately one hundred support modifications will be made during the upcoming' outage. The remaining analytical work and hanger modi-fications will be made prior to and/or during the subsequent refueling outage scheduled for the fall of 1981. At that time, it is expected that all activities required by I&E Bulletin Nos. 79-14 and 79-02 will be complete.

Following the 1980 refueling outage, NNECO intends to submit c report summarizing the design and construction efforts completed at that time. In addition, NNECO 2 -will outline the remaining work required to disposition the concerns of I&E Bulletin Nos. 79-14 and 79-02.

NNECO has determined this to be the most prudent course of action available to expeditiously accomplish the large amount of analytical and construction

-work remaining in accordance with the requirements of I&E Bulletin Nos.'79-14 and 79-02. This approach will address a major portion of the safe shutdown systems'_and consequently the ability of the plant to shutdown during a seismic

-event will not be compromised. ,

In response to'a commitment to the resident inspector, NNECO hereby provides

~

Attachment 4, ~ the ' analytical justification allowing credit to be taken for less than full-thread engagement of anchor: bolts.

We trust'you find this'information satisfactory to concur in the above-outlined approach.

Very truly yours, NORTHEAST NUCLEAR ENERGY CO>TANY

/ ,

bN W. dG'. Counsil Senior Vice President Attachments I

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DOCKET NO. 50-336 4

ATTACHMENT 1 4

- MILLSTONE NUCLEAR POWER STATION, UNIT NO. 2

' I&E BULLETIN NO. 79 - I&E BULLETIN No. 79-14 i

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ATTACHMENT II

! OBE VS. DBE EVALUATIONS Stress Problem No. System 13 -Main Steam 26 Main Steam 114 Service Water 48 Safety Injection I

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ATTACHMENT 3.

, MILLSTONE NUCLEAR POWER STATION, UNIT NO. 2 I&E BULLETIN No. 79-02 I&E. BULLETIN No. 79-14 4-Y 1

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ATTACHMENT III

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- 10tC IE BULLETIN 79-02 MILLSTONE UNIT I'

SUMMARY

OF HANGER STATUS FOR June 30, 1980 SERVICE WATER, MAINSTEAM, HIGH PRESSURE SAFETY INJECTION-SYSTEMS AND MANGER BASEPLATES/ EXPANSION d ANC' ORS WITH SAFETY FACTOR LESS THAN 2 PROBLEM NO. AREA STATUS FANGER NO.

46 AUX. Repair issued 6/6/80

1. .301080 3

48 AUX. Repair issued 5/26/80 2 301109 AUX. Factor of Safety > 4

3. 301111 38 *

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AUX. Factor of Safety 2 to 4

.4. 302080 42 55 AUX. Factor d Safety 2 to 4

5. 302102 --

91' AUX. Factor of Safety 2 to 4 6 303119 49B AUX. Repair issued 6/6/80

7. 303295 169 AUX Factor of Safety 2 to 4
8. 305258 75 AUX. Repair issued 6/5/80
9. 305561 87 AUX. Factor of Safety 2 to 4
10. 305661 157 CTMT. Factor of Safety 2 to 4 l

?l. 305672 174,175 CTMr. Factor of Safety 2 to 4 12 305733 138 CTMI. Factor of Safety 2 to 4

13. 305818 75 AUX. Factor of Safety 2 to 4 l' . 305924 110 YD. Factor of Safety 2 to 4
15. 305968 110 YD. Factor of Safety 2 to 4
16. 305972 110 YD. Factor of Safecy 2 to 4
17. 305974 33 YD. Factor of Safety > 4
18. 305992 AUX. Factor of Safety 2 to 4 306009 40A
19. Factor of Safety 2 to 4 40A AUX,
20. J06010 40A AUX. Factor of Safety 2 to 4
21. 306064 57 .YD . Factor of Safety > 4
22. 306207 CTMI. Factor of Safety 2 to 4 j
23. 312017 1 '

2 CTMr. Factor of Safety 2 to 4 24 312018 1 CTMI. Factor of Safety 2 to 4

25. 312019 AUX. Factor of Safety 2 to 4
26. 313074 100 25 AUX. Repair Issued 6/07/80
27. 313107 28, 115 AUX . W.H . Factor of Safety 2 to 4 327002 114- 20 Repair issued 5/10/80
29. 327076 120 AUX. Factor of Safety 2 to 4

' 3 0. 327138 Factor of Safety >4 116 AUX.

31. 327147 118 AUX. VOID (No Base Plate)
32. 327149- ,

66 AUX. Factor of Safety 2 to 4

33. 350112

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M111stona Unit II Juae 30, 1980 Problem No. Area Status Hanaer No.

M.S. 13 AUX Factor of Safety ? to 4

34. 413031 13 AUX Factor of Safety >4
35. 411011 13 AUX Field Issued 6/1/80 -
36. 417016 Repair Issued 5/9/80 114 70
37.  ??7075 -

114 10 Repair Issued 5/9/80

38. $77077 114 70 Repair Issued S/9/80
39. 397078 114 ?O Repair Issued 5/8/80
40. 377087 114 70 Factor of Safety ? to 4(01d Loads)
41. 4?7019 M4 70 Factor of Safety 7 to 4 (Old Loads'
42. 47704' 114 70 Repair Issued 5/10/80
43. 477047 114 70 Factor of Sa fety >4 (Old Loads) 44a 577079 114 70 Factor of Safety >4 (Old Loads)
45. 5270'O 114 70 Factor of Safety 7 to 4 (Old Loads
46. 577044 114 70 Factor of Safety ? to 4 (01d Loads:
47. 5?7045 114 70 Factor of Safety ? to 4(Old Loads
48. 5?7065 S.W.114 70 Factor of Safety > 4 (Old Loads)
49. 5?7066 114 70 Factor of Safety ? to 4(01d Loads >
50. 5?7067
51. 114 70 See repair 327087 577039 TMR-005 CDiT Repair issued 6/6/80
52. 41009.

E-1475-7 TURB Repair issued 6/6/80

53. 414011 174 CTMT Repair issued 6/14/80 54 505287 174 & 155 CTMT Repair issued 6/5/80
55. 305744 48 AUX Repair issued 5/28/80
36. 401031 42 AUX Repair issued S/28/80
57. 302081
58. 401004 47 AUX Repair issued 5/28/80
59. 503012 48 AUX Repair issued S/31/80
60. 527043 122 AUX Repair issued 6/2/80 i
61. 401030 48 AUX Repair. issued 5/30/80 AUX Factor of Safety > 4 62, 402012 47 AUX Factor of Safety y 4 63 402013 47 47 AUX Block Wall 64 '402014 Factor of Safety > 4
65. 402016 47 AUX AUX Factor of Safety > 4
66. 402032 47 47 AUX Factor of Safety > 4
67. 402035 l Repair issued S/28/80 68 302081 42 AUX Page 2 of 9

Mill 2tona Unit II

' ' June 30, 1980

, Banger No. Problem No. AREA Status 47 AUX. Repair issued 5/29/80

'69. 380003- -

54 AUX. w/w307d09

, 70. 395371 Factor of Sa'fety > 4

71. 402010 48 AUX. ,,

43 AUX. Factor of Safety 2 to 4 -

72. 402065' .

41 AUX. Factor of Safety 2 to 4

73. 402074
  • 11 CTE. Factor of Safety > 4
74. 402113 CTM . Factor of Safety 2 to 4
75. 402116 THR 014, 015 49B, 60 AUX. Repair issued 6/6/80
76. 403081 52 " AUX. Factor of Safety >4
77. 404003
  • AUX.

Factor of Safety) 4

78. 404004 52
79. 405036 67 AUX. Repair issued 6/18/80 79 AUX. Factor of Safety 2 to 4
80. 405062 79 AUX. Repair Issued 6/05/80
81. 405063
82. 405103 80 AUX. Repair issued 5/30/80
83. 405127 80 AUX. Factor of Safaty 2 to 4 77 AUX. Repair Issued 6/05/80 84, 405204 110 YD. Factor of Safety 2 to 4
85. 405269 110 YD. Factor of Safety 2 to 4
86. 405283 110 YD. Factor of Safety 2 to 4
87. 405286 .

35 TURB. Factor of Safety 2 to 4

88. 405344 35 TURB. Factor of Safety 2 to 4
89. 405345 35 TURB. Repair Issued 6/4/80
90. 405351
91. 405409 85 TURB. Factor of Safety >4  ;
92. 405425 169 TURB. Factor of Safety 2 to 4 l
93. 405432 169 TURB. Factor of Safety > 4 169 TURB. Factor of Safety 2 to 4
94. 405436 72 TURB. Factor of Safety >4
95. 405701 TMR 009 CTE . Repair issued 6/6/80
96. 410014
97. 410015 TMR 009 CTE . Repair issued 6/6/80 ,'

THR 009 CTMI . Repair issued 5/31/80

98. 410018 TMR 011 CTE. Factor of Safety > 4
99. 410029 THR 011 CTE . Factor of Safety >2 100. 410032 TMR 014, 015 CTE . Repair issued 6/6/80 101. 410060 Page 3 of 9 f-~.- - - - **

Millstsne 5n~it II

~ June 30,1980 Problem No. AREA Status Hanner No.

...THR 014, 015 CTE. Factor of Safety 2.to 4

- 1 02 410061 103. 410080 THR 013 AUX. Factoro[fSafety2to4 THR 022 CTE. Factor of Safety 2 to 4 1 04. 410110 FactorofSafety2to4)*

412002- 2 CTE.

105. _

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13 AUX. Factor of Safety 2 to 4 106. 412009 22 CTMr. Factor of Safety > 4 107. 412014 21 CIE. Factor of Safety 2 to 4 108. 412017 22 AUX. Factor of Safety (4 109. 413018 13 AUX. Repair issued 5/21/80 110. 413019 111. 413024 13 AUX. Factor of Safety ( 4 13 AUX. Factor of Safety 2 to 4 112. 413025 13 AUX. . Factor of Safety 2 to 4 113. 413032 -

25 TURB. Factor of Safety 2 to 4 114. 413118 25 TURB. Factor of Safety 2 to 4 115. 413119 25 TURB. Factor of Safety 2 to 4 116. 413120 TURB. Factor of Safety 2 to 4 117. 413121 25 TUP 3. Factor of Safety 2 to 4 118 413122 101 .,

AUX. Factor of Safety 2 to 4 110 '413128 100 CTE. Factor of Safety 2 to 4 120 413153 24

  • I AUX. Factor of Safety 2 to 4 121. 413199 25 -

J 122. 413207 101 ,

TUF3. Factor of Safety 2 to 4  !

101 AUX. Repa'- Tesued 6/6/80 123. 417025 197 B CTE. Be; .d 6/1/80 124. 417030 114 20 Repair Issued 5/9/80 125. 427046 114 20 Repair Issued S/9/80 126. 427048 118 AUX. Factor of Safety >4 127. 427092 114 20 Repair Issued 5/11/80 128. 427105 CIE . Factor of Safety 2 to 4 129. 450166 236 13 TURB. Repair Issued 5/20/80 13 0. 490001 13 TURB. Repair Issued 5/20/80 131. 490002 13 TURB. Repair Issued 5/22/80 132. 490004

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AUX. Factor of Safety 2 to 4 502003 43 133.

43 AUX. Repair issued 6/6/80 134 502013 ,

AUX. Factor of Safety 2 to 4 135. 502034 41 164 AUX. Repair _ issued 6/6/80 136. 503009 503011 164 AUX, Repair issued _6/5/80 137.

Page 4 of 9

Millstons Unit II Juna 30,1980 Banner No. Problem No. AREA Status 75 AUX. Fhetor of Safety 2 to 4 138 505006 .

70 AUX. W.H. Repair issued 6/6/80 139. 505017

- 156 CTE. Factor of Safety 2 to 4 3

140. 505021 Factor of Safety 2 to 4, 33 TURB.

141 505034--

AUX. W.H. Factor of Safety 2 to-4 142 505035 88 32 A & B AUX. Repair Issued 6/6/80 143. 505048 , .

110 TURB. Repair Issued 6/06/80 144. 505061 110 TURB. Factor of Safety (4 145. 505070 ,

72 AUX. Factor of Safety 2 to 4 146. 505084 169 AUX. Repair issued 6/15/80 147. 505098 75 AUX. Repair Issued 6/07/80 148. 505106 149. 505111 66 AUX. .

Factor of Safety 2 to 4

'150. 505137 74 AUX. Factor of Safety (4 151. 505139 74 AUX. Factor of Safety (4 74 AUX. Repair issued 6/6/80 152. 505150 73 AUX. Factor of Safety 2 to 4 153. 505171 78 AUX. Repair Issued 6/07/80 154. 505181 73 AUX. Repair issued 6/19/80 155. 505196 156. 505259 35 TURB. Repair issued 6/4/80 157. 505261 132 CTE. Repair issued 6/5/80 110 TURB. Factor of Safety >4 158. 505262 ,

159. 505324 28 AUX. Repair Issued 6/6/80 AUX. Factor of Safety 2 to 4 l 160. 505325 26 i

161. 506001 38 AUX. Factor of Safety 2 to 4 58 AUX. Factor of Safety 2 to 4

162. 506006 '

54 AUX. Repair issued 6/6/80 163. 507001 Factor of Safety 2 to 4 THR 009 CTE .

, 164. 507002 Factor of Safety 2 to 4 TNR 009 CTE .

i 165. 507003 THR 001 CTE Factor of Safety 2 to 4 166. 510016 TMR 001 CTE. Factor of Safety 2 to 4 167. 510018 THR 006, 007 CTE . Factor of Safety 2 to 4 168. 510020 TMR 022, 031 CTE. Factor of Safety 2 to'4 169. 510022 1

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M111 sten 2 Unit II June 30, 1980 heer No. Problem No. AREA Status AUX. Factor of Safety 2 to 4 370. 513018 .

100 AUX. Factor 'of Safety > 4 171. 517001 196 ~

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421 AUX. Voided -

172. 525051 '

114 20 Repair w/w 427105 '.~

173. 527040.. ~

AUX. Factor of Safety 2 to 4 174. 527043 122 CM. Factor of Safety 2 to 4 175. 33RDP008 -

022, 023

.176. 305672 157 CM. Factor of Safety 2 to 4

,177. 312009 2 CM. Factor of Safety 2 to 4

.178. 410089 001 CTMr. Repair issued 6/6/80

179. 302083 46 " AUX. Encased in Concrete 109 329001 ,

C-1 TURB. ,

Factor of Safety ( 4

181. 329002 C-1 TURB. Renair issu'ed 5/20/80 182 329003 C-1 TURB. Factor of Safety (4 l 183. 329004 C-1 TURB. Faetor of Safety (4 184. 329005 C-1 TURB. Factor of Safety (4
185. 329006 C-1 TURB. Repair issued 5/16/80 186. 329007 C-1 TURB. Repair issued 5/16/80

~

187. 329008 C-1 TURB. Factor of Safeb (4 188. 329009 C-1 TURB.

Factor of Safety (4 189. 329v10 C-1 TURB. Factor of Safety (4 190. 329012. C-1 TURB. Factor of Safety 2 to 4 191. 329013 C-1 TURB. Factor of Safety 4 4 C-1 TURB. Factor of Safety < 4 192. 329014 193. 329015 C-1 TURB. Faefor of Safety (4 194. 329016 C-1 TURB. Factor of Safety (4 195. 329017 C-1 TURB. Factor of Safety 2 to 4 l 196. 329018 C-1 TURB. Factor of Safety ( 4 j 197. 329019 C-1 TURB. Factor of Safety 2 to 4 C-1 TURB. Factor of Safety 74 198. 329020 C-1 AUX. W.H. Factor of Safety 2 to 4

, 199. 329021 C-1 AUX. W.H. Factor of Safety ( 4-

' 200. 329022 201. 329023 C-1 AUX. W.H. Factor of Safety 2 to 4 202. 329024 ~

C-1 . AUX. W.H. Faetor of Safety (4 203. 329025 C-1 AUX. W.H. Factor of Safety 4 4

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Millstona Unic II Jun2 30,1980 Problem No. Area Hanger Wo, S.tatus AUX Factor of Safety > 4 204 401013 48 AUX Factor of Safecy> 4 3 2 0~. 401014 48 AUX Factor of Safety? 4 206. 401016 48 ~

~

AUX Factor of Safety > 4 -

401018 48 207.

AUX Factor of Safety? 4 48 208. 401019 AUX Factor of S fety> 4 401020 48 209.

AUX Factor of Safety 2 to 4 210 401021 48 ,

AUX Factor o# Safety > 4 211 401027 48 AUX Factor of Safety > 4 212. 401029 48 AUX Factor of Safety > 4 2 13 . 402010 48 AUX Factor of Safety > 4 214 402018 48 AUX Factor of Safety > 4 402033 48 215.

AUX Factor of Safety > 4 402095 48 216.

AUX Factor of Safety > 4 403080 48 217.

AUX Factor of Safety > 4 502017 48 218.

AUX Factor of Safety > 4 502020 48 219.

AUX Factor of Safety > 4 48 220. 502021 AUX Factor of Safety > 4 221 502022 48 l

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  • JD Millotm Unit II L . Jun2 30, 1980 Problem No. Area Status Ranger No.

58 AUX Factor of Safety >4 (222. 301081 AUX. Factor of Safety 2 to 4 223. 305560 75 224 305658 79 AUX. Repair Issued 6/10/80 ,

148 CTNI. Re' pair Issued 6/11/80 225. 305730 174 & 155 CTNI. Repair issued 6/5/80 226. 305774 102 TURB, Factor of Safety ) 4 227. 305925 106 AUX. Factor of Safety > 4 228. 401078 TMR 011 CTMT. Repair Issued 6/3/80 229. 402099 ,

11 CTMT. Factor of Safety 2 to 4 230. 402112 164 ' UX .

A Factor of Safety 2 to 4 231. 403074 AUX, Factor of Safry 2 to 4 232. 404022 53 72 AUX. Factor of Safety ( 4 233. 405622 135 CTNr. Factor of Safety 2 to 4 234. 405683 235. 135 CTMT. Factor of Safety 2*to 4 405724 40 AUX. Facr.or of Safety > 4 236. 406115 CTMT.

Factor of Safety > 4 237, 407007 TMR 005 13 AUX. Factor of Safety 2 to 4 238 412003 13 AUX. Factor of Safety 2 to 4 239. 413029 13 AUX. Factor of Safety 2 to 4 240. 413030 i3 TURB. Factor of Safety 2 to 4 241. 413071 412169 25 AUX. Repair Tssued 6/08/80 242.

25 AUX. Factor of Safety 2 to 4

' 243. 413184

'25 AUX. Factor of Safety 2 to 4 244. 413192 AUX. Factor of Safety 2 to 4 245. 413198 25 118 AUX. Factor of Safety >4 246. 427092 AUX. Factor of Safety >4 247. 427099 112 248. 427113 115 AUX. Factor of Safety >4 249. 505170 79 AUX. Repair Issued 6/11/80 82 AUX. Factor of Safety >2 250. 505195 251I 505300 66 AUX. Repair issued 6/9/80 Factor of Safety > 4 2 52 513019 24 AUX.

525042 420 AUX. Repair Issued 6/11/80 l 253. ,

421 AUX. Repair Issued 6/11/80 254 525043 i c55, 527063 114 20 Repair Issued 5/9/80 114 20 Repair Issued 5/9/80 j 256. 527064 Pag N [f 9 ~ " " '

SUPPLEMENT 2 Mil 10 tone Unit II

- WORK /WITH HANGERS June 30, 1980 WORK /WITH STATUS 1 HANGER PROBIIM NO. AREA STATUS 301109 47 -

AUX. Repair Issued 5/26/80 257. 301110

@S8. 399773 302102 55 AUI. Factor of Safety 2 to 4

,259. 305661 87 AUX.. Factor of Safety 2 to 4 399494 305924 ~75 AUX. Factor of Safety 2 to.4

. 260. 399617 261. 305983 305968 33 YD. Factor of Safety 2 to 4 262. 315152 305968 110 YD. Factor of Safety 2 to 4 f 263 350019 305968 110 YD. Factor of Safety 2 to 4 264 505076 305972 33 YD. Factor of Safety 2 to 4 265. 305987 305972 110 YD. Factor of Safety 2 to 4 266. 505073 305974 33 YD. Factor of Safety 2 to 4 '

267. 305989 305974 110 YD. Factor of Safety 2 to 4

-268. 350010 305974 110 YD. Factor of Safety 2 to 4 269. 312012 312017 1 CM. Factor of Safety 2 to 4 270 412007 312018 2 CM. Factor of Safety 2 to 4 271 327148 327147 118 AUX. VOID 2 72 327150 327149 118 AUX. Factor of Safety) 4 273 403079 380003 49 AUX. No Bolts 274. 380011 380003 49 AUX. No Bolts 275. 403050 380003 60 AUX. No Bolts 276. 307009 399371 54 AUX. Repair issued 6/6/80 277. 502013 402065 55 AUX. Repair issued 6/6/80 278 403094 402065 43 AUX. No Bolts 279. 401076 405127 80 AUX. Factor of Safety 2 to 4 280. 405269 33 YD. Factor of Safety 2 to 4 405270 405283 33 YD. Factor of Safety 2 to 4 281. 405284 282 405286 33 YD. Factor of Safety 2 to 4 405287 283. 405410 405409 85 AUX. Factor of Safety >4 284. 410028 410029 THR- 011 CM. w/w 410032 (NUSCO) 285. 305310 450166 131 CM. Factor of Safety 2 to 4

,286. 505307 450166 132 CM. Factor of Safety 2 to 4

' 287. 505308 450166 131 CM. Factor of Safety 2 to 4 Page 9 of 9 e # * * *.sep#M6

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