ML20235H282
| ML20235H282 | |
| Person / Time | |
|---|---|
| Site: | Braidwood  |
| Issue date: | 09/23/1987 |
| From: | COMMONWEALTH EDISON CO. |
| To: | |
| Shared Package | |
| ML20235H281 | List: |
| References | |
| 1258A, PROC-870731-01, NUDOCS 8710010003 | |
| Download: ML20235H282 (147) | |
Text
_ _ _ _ _ _ _ - _ - _ _ _ _ _ _ _ _ _ - _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ .
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BRAIDWOOD UNIT 2 PRESERVICE INSPECTION PROGRAM l
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l 1756m(072287)1 !
1258A - l 8710010003 B70923 i DR ADDCK050g6 i
1 Introduction >
l This document represents the Preservice Inspection Program for Braidwood Nuclear Station, Unit 2. The Braidwood Program is intended to comply with the requirements set forth in Section 50.55a ;
(g)'3, 10 CFR Part 50; ASME Boiler and Pressure Vessel Code, Section
- I XI (1977 edition including Addenda through Summer 1978), Subsections IWA, IWB, IWC and IWD; and Standard Review Plans 5.2.4 and 6.6.
i 1756m(072287)3 ,
1258A
i1 i !
1
. i Section 2 Frogram Description 1756m(072287)4 1258A
Program Description t
The Preservice Inspection Program for Braidwood Nuclear Station, Unit 2, meets the requirements of ASME Section XI 1977 edition including Addenda through Summer 1978. Where these requirements are determined to be impractical, specific requests for relief have been written.
The Systems have been classified by the architect engineer, .
Sargent and Lundy, utilizing the guidelines of regulatory Guide 1.26.
The attached program addresses only those examinations required by the IWA, IWB, IWC and IWD portions of Section XI as well as augmented exams required by the Nuclear Regulatory Commission.
The PSI program is presented in a tabular form. - Class 1, 2 and 3 requirements l(Sections 3, 4 and 5 respectively) are listed in a manner consistent with the Section XI examination tables.
Abbreviations are used in the exam (ination) method column with vol.
meaning volumetric examination and surf. meaning surface examination required.
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1258A m_____________m__-._ _ W
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Table of Contents Section 1 Introduction Section 2 Program Description Section 3 ' Examination Requirements for Class 1 Components Section 4' Examination' Requirements for Class 2 Component.s Section 5 Examination Requirements for Class 3 Components Section 6 Requirements for Augmented Inspections Section 7 Notes
, Section 8 Relief Requests Section 9 Figures, detailing examination volume Section 10 Exemptions
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Section 7 Notes ( (. ,. 1756m(072287)39
. 1258A
i- . .- R:v. 0 , l ( 1 NOTE 1 In some cases Section III, construction surface exams are being
- used.in lieu of on site, preservice exams. The substitution program is not a generic one. Each surface report is reviewed by the on-site ANII to determine if the requirements of IWB/IWC 2200 are met.
The surface examination procedures have been reviewed and accepted for Section XI acceptability by Hartford Steam Boiler and the Commonwealth Edison Level III. I J l 1756m(072287)40 1258A __.___E_____.___________.'__.
Rov. 0 NOTE 2 Volumetric examination coverage of the ASME, Section XI Class 2 welds, listed below were limited because of component geometry or interference. Weld # Line # Reason for Limited Exam 2FW-05-22 2FW81BB-6" Fitting Geometry , 2FW-05-24 2FW81BB-6" Sockolet Obstructing Scan 21W-08-32 2FW87CD-6" Elbow Inner Radius, Nozzle Configuration 2FW-09-25 2FW87GA-6" Elbow Inner Radius, Nozzle Configuration 2FW-10-14 2FW81BC-6" Valve Geometry, Elbow Inner Radius 2MS-02-61 2MS13AD-8" Reducer to Valve ~ 2MS-04-61 2MS13AA-8" Reducer to Valve 2MS-06-60 2MS13AB-8" Reducer to Valve 2MS-08-58 2M513AC-8" Reducer to Valve 2SI-04-07 2SIO5BA-8" Fitting Geometry - 2SI-04-13 2 SIC 5CD-8" Reducer to Valve 2SI-04-14 2SIO5CA-8" Fitting Geometry - 2SI-04-63 2SIOSCA-8" Reducer to Valve 2SI-12-18 2SIO4B-12" 3/4" Obstruction, Valve Geometry 2SI-24-37 2SIO6BA-24" Reducer to Valve 2SI-24-82 2SIO6BB-24" Reducer to Valve 2SI-26-06 2SIOSCC-8" Reducer to Valve ( - 2SI-26-63 2SIO5CB-8" Reducer to Valve These welds received an ultrasonic examination consisting of. axial and circumferential scans; however, because of the listed limitations, the axial scan from one side could not guarantee complete coverage of the required volume. 4 i (' - 1756m(072287)41 1258A
\ :, * *
, ~ :.
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' NOTE 3 Braidwood Station intends t'o use field installation data in lieu of on-site preservice exams for Class 1, 2, and 3 component supports.
4 C . f
?
O l 1756m(072287)42 1258A
Rav. ~ 0 , t .
~
t 4 NOTE 4 Braidwood has requested and received NRC approval to use code case N-401. The code case allows for digitally encoded eddy current data as an alternative to magnetic tape and strip chart recordings. s. i
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1756m(072287)43 - 1258A l.
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-R:v. 0 .
NOTE 5 Braidwood intends to use shop examination reports in lieu of in field examinations'on the reactor coolant pump fly. wheels. 1756m(072287)44
/ 125BA
+-: _ _ _ - . _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
_- .. . ~ - - - . - . - - . . . . - .
. , . - . , .- e .
Rav. 0 f k . NOTE 6 All Class 1, 2 and 3 components have received acceptable Section III hydrostatic leak tests and since later, approved editions of Section XI (e.g.1983) do not require a preservice
- 1eakage test, Braidwood does not intend to perform a preservice VI-2. VT-2 examinations will be performed,.however, in those cases where a leak test is being substituted for a surface and/or volumetric examination.
I. l l 1756m(072287)45
/ 1258A
*i ' , , . .
R:v. 0 , j . l I-l NOTE 7 The A.S.M.E. Section XI Class 2 welds listed below were inaccessible for examination.
!!!1d # Line # Interfering Condition 2SI-24-19 2SIO6BA-24" Inaccessible, obstructed by floor 2SI-24-20 2SIO6BA-24" Inaccessible, obstructed by floor 2SI-24-21 2SIO6BA-24" Inaccessible, obstructed by floor 2SI-24-40 2SIO6BB-24" Inaccessible, obstructed by expansion joint 2SI-24-41 2SIO6BB-24" Inaccessible, obstructed by expansion joint 2SI-24-42 2SIO6BB-24" Inaccessible, obstructed by expansion joint 2SI-24-64 2SIO6BB-24" Inaccessible, obstructed by floor 2SI-24-65 _2SIO6BB-24" Inaccessible, obstructed by floor 2SI-24-66 2SIO6BB-24" Inaccessible, obstructed by floor
( e 1756m(072287)46 1258A
Section 8 Relief Requests l l 1 ( 1756m(072287)47 1258A
.____-______________-___n
Rev. 0 RELIEF REQUEST 2NR1 1
- 1. SYSTEM: Main Steam, Safety Injection, and Residual Heat Removal
- 2. NUMBER OF ITEMS: 24 Line Number Weld Number 2MS07AA-28" 2MS-04-34, 2MS-04-37, 2MS-04-40, 2MS-04-43, 2MS-04-46 2MS07AB-28" 2MS-06-34, 2MS-06-37, 2MS-06-40, 2MS-06-43, 2MS-06-46 2MS07AC-28" 2MS-08-31, 2MS-08-34, 2MS-08-37, 2MS-08-40, 2MS-08-43 2MS07AD-28" 2MS-02-36, 2MS-02-38, 2MS-02-42, 2MS-02-44, 2MS-02-47 2SIO6BA-24" 2SI-24-25, 2SI-24-26 !
2SIO6BB-24" 2SI-24-70, 251-24-71
- 3. A.S.M.E. CODE CLASS: 2
- 4. .A.S.M.E. CODE SECTION XI REQUIREMENTS: Examination Category C-F, Items C5.31 and C5.32, require a surface examination of the area described in Figures IWC-2520-7 and 2520-9. The required area is t 100% of each circumferential weld requiring examination and 2.5t of the longitudinal weld at the intersecting circumferential weld. IWC-2200 states:
- a. All examinations required by this article for those components
/ initially selected for examination in accordance with
(" ' Inspection Program A or Inspection Program B and not exempt from inservice examinations by IWC-1220 shall be completed prior to initial plant startup.
- 5. BASIS FOR RELIEF: The above listed welds are inaccessible to surface e' examinations, due to the location of saddle plates over the pressure retaining welds.
- 6. ALTERNATE TEST METHOD: A surface examination, (liquid penetrant) and visual examination (leak test) will be performed on the saddle l plate fillet welds in lieu of the required surface examinations for the pressure retaining welds listed above.
- 7. JUSTIFICATION: Performing a surface and visual examination of the saddle plate fillet welds provides an acceptable level of .
structural integrity for system operation. Radiographs performed on the branch pipe circumferential welds verify its structural integrity at the time of construction. Therefore, an adequate level of plant operational safety can be assured on these welds. 1 I i ( l 1756m(072287)48
+ s. . . . /? 1 s . .i , ,
. ,e
.. RELIEF REQUEST 2NR2 Rev. O f^
U
- 1. SYSTEM: - Reactor Coolant '
- 2. NUMBER OF ITEMS: .8.
i Line Number Weld Number 2RC02AA-31 2RC-01-17 2RC02AB-31 2RC-02-31
, 2RCO2AC-31 2RC-03-17 2RC02AD-31, 2RC-04-18 2RC01AA-29. 2RC-01-4 2RCOTAB-29 2RC-02-18 2RC01AC-29 2RC-03-4 2RC01AD-29 2RC-04-5
- 3. .A.S.M.E. CODE CLASS: 1
- 4. A.S.M.E. CODE SECTION XI REQUIREMENTS: Table IWB-2500-1; Examination Category B-J, Item B.9.11 requires surface and.
volumetric examination of the regions described in Figure IWB-2500-8 for piping 4 in. nominal pipe size and greater. This examination includes essentially 100% of the weld
. length. In addition, Appendix III; Supplement 7, requires that ultrasonic examination sensitivity be established using I.D. notches with a depth of 10% wall thickness.
{-
' . ,5. BASIS FOR RELIEF: The above listed welds are cast stainless elbows to either cast pumps or cast valves.
The optimized ultrasonic technique used for the statically cast stainless steel welds will detect large flaws'(25% or greater through the wall) therefore.this sensitivity is less than that required by code.
.In' addition, due to the unwieldly characteristics of the contoured wedge search units and variations in the machined.
surfaces, the welds listed above experienced axial and circumferential scanning limitations.
- 6. ALTERNATE TEST M3THOD: None.
- 7. JUSTIFICATION: The structural integrity of these welds has j been assured by:
a.. Having performed a best effort ultrasonic exam, based on state of the art techniques, of the cast stainless welds. j
- b. Having performed acceptable radiographic and surface ,
examinations. l 1 i 1
~
1756m(072287)49 1 _ _ _ _ _j
=
c i . 1 RELIEFREQUEST2NR$ Rev. 0
- 1. SYSTEM: Reactor Coolant, Reactor Coolant Pressurizer,' Safety Injection, and Residual Heat Removal.
- 2. NUMBER OF ITEMS: 41
- 3. A.S.M.E. CODE CLASS: 1
- 4. A.S.M.E. CODE SECTION XI REQUIREMENTS: Examination Category, B-M-2, Item B12.40 requires a visual. (VT-1) examination of the valve body internal surfaces on valves exceeding 4 inches nominal pipe size. Examinations are limited to one valve within each group of valves that are of the same constructional design, e.g. globe, gate or check valve, manufacturing method and that are performing similar functions in the system e.g. containment isolation, system overpressure protection.
- 5. BASIS FOR RELIEF: The requirement to disassemble an operable valve for the sole purpose of performing a visual, (VT-1) of the internal pressure retaining boundary is impractical and not commensurate to the increased safety achieved by this inspection. Class 1 valves are installed in their respective systems and many have completed functional testing. To disassemble these valves would provide a very small potential for increasing plant safety margins with a very disproportionate
( impact on expenditures of plant manpower and resources.
- 6. ALTERNATE TEST METHOD: The manufacturers test data will be used in lieu of a preservice visual examination (VT-1). This includes documentation of examinations performed during fabrication and installation of the subject valves. The examinations performed may include golumetric, surface, and visual exams, as required by A.S.M.E. Section II, Material Specifications for Ferrous and Nonferrous materials.
- 7. JUSTIFICATION: The integrity of the pressure retaining boundary of both carbon steel and stainless steel valve bodies has been excellent. Class 1 valve bodies cannot historically be linked to breaching of the pressure retaining boundary in plant systems. Class 1 valves are subjected to numerous types of nondestructive testing and a rigorous quality assurance program during all stages of fabrication, storage, and installation.
These valves have been found acceptable by the Manufacturer, the A.S.M.E. Authorized Nuclear Inspector and Commonwealth Edison's Quality Assurance. d 1756m(072287)50
l l I RELItF REQUEST 2NR4 Rev. O k ,
- 1. SYSTEM: Pressurizer Vessel and Steam Generator Vessel-(Primary Side) i
- 2. NUMBER OF ITEMS: 14 Component Number Weld Number 2RC01BA Primary Nozzles (2) 2RC01BB. Primary Nozzles (2) 2RC01BC Primary Nozzles (2) 2RC01BD Primary Nozzles (2) 2RYO15 RY 1, 2, 3, 4A, 4B, 4C
- 3. A.S.M.E. CODE CLASS: 1 j
- 4. A.S.M.E. CODE SECTION XI REQUIREMENTS: Table IWB-2500-1, Examination Category B-D, Items B3.120 and B3.140 require volumetric examination of the regions described in Figure IWB-2500-7 for the inner radius of nozzles in the pressurizer and steam generators (primary side).
Subarticle IWB-2200, "Preservice Examination" states that:
- a. Examinations required by this article shall be completed
, , prior to initial plant startup. In addition, the preservice examinations shall be extended to include essentially 100%
of the pressure retaining welds in all Class 1 components except in those compenents exempted from examination by IWB-1220 (a), (b), or (c).
~
- 5. BASIS FOR RELIEF: The nozzles listed above all contain inherent geometric constraints and clad inner surfaces which limit the ability to perform meaningful volumetric examinations. In an attempt to develop a technique to locate flaws in the nozzle inner radii area, a mock-up was used with little success.
- 6. ALTERNATE TEST KETHOD: All pressure retaining components were hydrostatically tested to the requirements of A.S.M.E.
Section III.
- 7. JUSTIFICATION: In performing the hydrostatic test on all pressure retaining components, an adequate level of structural integrity is assured for plant operation.
1756m(072287)51
(p .. - - e ( RELIEF REQUEST 2NR5 Rev. 0
- 1. SYSTEM: Reactor Coolant
~
- 2. NUMBER OF ITEMS: 8 l
Cast Stainless Steel SA 351-CF8A (Elbow) to Cast Carbon Steel SA-216 GR-WCC (Nozzle) Line Number Weld Number 2RC01AA-29" 2RC-01-8 2RCO2AA-31" 2RC-01-9 2RC01AB-29" 2RC-02-19 2RCO2AB-31" 2RC-02-23 2RC01AC-29" 2RC-03-8 2RCO2AC-31" 2RC-03-9 2RC01AD-29" 2RC-04-9 2RCO2AD-31" 2RC-04-10
- 3. ASME CODE CLASS: 1
- 4. ASME CODE SECTION XI REQUIREMENTS: Table IWB-2500-1, Examination Category B-F, Item B5.30 requires surface and volumetric examination of the regions described in Figure IWB-2500-8 for all Steam Generator nozzle-to-safe end welds.
(' - This examination includes essentially 100% of the weld length. In addition, Appendix III Supplement 7, requires that ultrasonic examination sensitivity be established using I.D. notches with a ; depth of 10% wall thickness. '
- 5.
- BASIS FOR RELIEF: The welds listed above are cast austenitic stainless steel SA-351-CF8A to cast carbon steel SA-216 GR-WCC l with austenitic stainless steel cladding. The techniques used {
to examine the cast stainless side of these welds will detect ! large flaws (25% or greater through the wall) therefore this sensitivity is less than that required by code.
- 6. ALTERNATE TEST METHOD: None.
- 7. JUSTIFICATION: The structural integrity of these welds has been assured by:
f
- a. Having performed a best effort ultrasonic exam, based on state of the art techniques, from the cast stainless side.
- b. Having performed an acceptable ultrasonic exam from the carbon steel side,
- c. Having performed acceptable radiographic and surface examinations.
1756m(072287)52 1258A o _ _
f \ I- [ RELIEF REQUEST 2NR6 Rev. O
\.
- 1. SYSTEM: Reactor Coolant
- 2. ~ NUMBER OF ITEMS: 36 Cast Stainless Steel SA-351-CF8A (Elbow) to l
Stainless Steel SA-376 Type 304N (Pipe) Line Number Weld Number 2RCO2AA-31" 2RC-01-10, 11, 12, 16 2RCO2AB-31" 2RC-02-24, 25, 26, 30 2RCO2AC-31" 2RC-03-10, 11, 12, 16 2RC02AD-31" 2RC-04-11, 12, 13, 17 2RC03AA-27.5" 2RC-01-30 2RC03AB-27.5" 2RC-02-12 2RC03AC-27.5" 2RC-03-31 2RC03AD-27.5" 2RC-04-31 Cast Stainless Steel SA-351-CF8 (Pump) to Stainless Steel SA-376 Type 304N (Pipe) Line Number Weld Number 2RC03AA-27.5 2RC-01-18 2RC03AB-27.5 2RC-02-1 2RC03AC-27.5 2RC-03-18 2RC03AD-27.5 2RC-04-19 Cast Stainless Steel SA-351-CF8M (Valve) I to Stainless Steel SA-376 Type 304N (Pipe) { i Line Number Weld Number 2RC01AA-29" 2RC-01-3 2RC01AB-29" 2RC-02-17 2RC01AC-29" 2RC-03-3 2RC01AD-29", 2RC-04-4 2RC03AA-27.5" 2RC-01-22, 23 2 RC03 AB-27 *. 5 " 2RC-02-5, 6 2RC03AC-27.5" 2RC-03-22, 23 2RC03AD-27.5" 2RC-04-23, 24
- 3. ASME CCDE CLASS: 1 i
1756m(072287)S3 l 1258A l
,;,, l: - ~ l, Nl , I' 4. ASME CODE SECTION XI REQUIREMENTS -Table IWB-2500-1, (. . ' Examination Category B-J, Item B9.11 requires surface and volumetric examination of the regions described in Figure. IWB-2500-8 for piping 4 in.' nominal pipe' size and greater, this' examination includes essentially,100% of.the weld-length. In addition, Appendix III, Supplement 7, requires
'that ultrasonic examination sensitivity be established using I.D.' notches with a depth of 10% wall thickness.
- 5. BASIS FOR RELIEF: 1The above listed welds.are cast stainless steel to wrought stainless pipe. The optimized ultrasonic-technique used'for the statically cast stainless steel welds will detect large flaws (25% or greater through the wall) therefore this sensitivity is less than that required by code. In addition, due to the unwieldly characteristics of the contoured wedge search units and variations in the
- machined 'surfa'ces, tho' welds listed above' experienced ' axial and circumferential. scanning limitations.
- 6. ALTERNATE TEST METHOD: None.
- 7. JUSTIFICATION: The structural integrity of these welds has been assured by:
- a. Having performed a best effort ultrasonic exam, based on state of the art techniques, from the cast stainless
'/. side. . Q> ,
- b. Having performed an acceptable ultrasonic exam from the non cast side.
- c. Having performed acceptable radiographic and surface examinations.
l 1756m(072287)S4
.; 1258A
.. . .s . ; ., .
RELIEF REQUEST 2NR7 Rev. 0 '.
.%l
'1. $,YSTEM: . Reactor Coolant 2.1 NUMBER OF ITEMSi 4 Cast Stainless' Steel SA-351-CF8A (Elbow) to Stainless Steel SA-182 GR-F316 (Safe-end)
Line Number ~ Weld Number 2RC03AA-27.5" :2RC-01-31 2RC03AB-27.5" 2RC-02-13 2RC03AC-27.5"- 2RC-03-32 2RC03AD-27.5" 2RC-04-32
- 3. , ASME CODE CIASS: 1
- 4. ASME CODE SECTION XI ' REQUIREMENTS: Table IWB-2500-1, Examination Category B-J, Item B9.11 requires surface and volumetric examination of the regions described in Figure IWB-2500-8 for piping 4 in nominal pipe size and greater.
This examination. includes essentially 100% of the weld
. s length. In' addition,. Appendix III, Supplemental 7, requires-that ultrasonic examination sensitivity be established using
'(- .
, I.D. notches with a depth of 10% wall thickness..
! 5. BASIS FOR' RELIEF: The above listed welds are all cast austenitic stainless steel to Reactor Vessel nozzle safe-ends. The optimized ultasonic te.chnique used for the statically cast side of these welds will. detect large flaws (25% or greater through the wall) therefore this sensitivity is less than that required by code. In addition, due to the unwieldly characteristics of the contoured wedge search units and variations in the machined surfaces, the welds listed above experienced axial and circumferential scanning
~1 imitations..
- 6. ALTEWATE TEST METHOD: None.
- 7. JUSTIFICATION: The structual integrity of these welds has been assured by:
q L a. Having performed a best effort ultrasonic exam, based on , l' state of the art techniques, from the cast stainless i side,
- b. Having performed an acceptable ultrasonic exam from the non-cast steel side.
- c. Having performed acceptable radiographic and surface
-( examinations.
i e l 1: 1756m(072287)55 i I L l u 1
< ~ .
^:
/ , RELIEF REQUEST 2NR8 Rev. 0
(. i,
- 1. SYSTEM: Reactor Coolant, Safety Injection
- 2. NUMBER OF ITEMS: 2 Line Number We_id Number 2RC04AB-12" 2RC 11-05 2RC04AA-12" 2SI-02-45
- 3. A.S.M.E. CODE CLASS: 1
- 4. A.S.M.E. CODE REQUIREMENTS: Examination Category B-J Item B9.31 requires a surface and volumetric examination of the areas. described in Figures IWB-2500-9 thru IWB-2500-ll for pipe branch connections greater than 2 in. nominal pipe size. This examination includes essentially 100% of the weld length.
- 5. BASIS FOR RELIEF: The above listed welds are 316 stainless steel weldolets. Due to the weld geometry and the metallurgical properties of the material ultrasonic examination of these welds is not practical.
- 6. ALTERNATE TEST ME"THOD: The above listed welds received the
- required Section XI surface examination.
- 7. JUSTIFICATION: The structural integrity of these welds is assured by having performed acceptable radiographic and surface examinations I
i l
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/
1756m(072287)56
~. r . u. . ~: ~ .
- I
- i. , l
~
F ( RELIEF REQUEST 2NR9 Rev. O k, -)
- 1. SYSTEM: Reactor Pressure' Vessel .
- 2. . NUMBER OF ITEMS: 4 Weld Number Figure Numbers RV-001. 4,5,6 q
RV-002 1,2,3 RVCH-001 8, 9, 11 RVCH-002 7, 8, 10
)
4
- 3. ASME CODE CLASS: 1
- 4. ASME CODE SECTION XI REQUIREMENTS:
Table.IWB-2500-1, Examination Category B-A, Pressure Retaining Welds in Reactor Vessel,. Item Numbers Bl.11, Bl.21, Bl.30, and B1.40 require volumetric examination of the regions described in Figures IWB-2500-1, 3, 4, and 5 respectfully for welds in the reactor pressure vessel. Article IWB-2200 "Preservice Examination" states that:
- a. Examinations required by this Article shall be' completed-(- prior to initial plant startup. In addition, the preservice examinations shall be extended to include essentially 100% of'the pressure retaining welds in all Class I components except.those components exempted from 1 examination by IWB-1220 (a), (b), and (c).
- b. Shop and field examinations may serve in lieu of on-site -!
preservice examination provided:
- 1) In the case of vessels only, the examination is performed after the hydrostatic test required by Section III has been completed;
- 2) Such examinations are conducted under conditions and with equipment and techniques equivalent to those that are expected to be employed for ,
subsequent inservice inspections; and ,
- 3) The shop and field examination records are, or can be documented and identified in a form consistent with those required in IWA-6000. 3
{ ' 1756m(072287)S7 1258A
/ 5. BASIS FOR RELIEF \" '
- a. Lower Shell Course-to-Dutchman weld RV-002 has six core support guide lugs welded to the interior surface of the reactor vessel approximately 3.50" above the weld.
These lugs restricted the automated inspection tool from inspecting the required volume in the areas of the lugs, shown in Figure 1. All of the weld and heat affected zone received 100% coverage from at least one direction, however the required base metal was not fully inspected in the area of the core support guide lugs. Figures 2 and 3 show exactly what was inspected. Note that the dimensions used for actual coverage are for transducer position, not volume inspected.
- b. Lower Disk-to-Dutchman weld RV-001 has 58 instrument tubes which physically obstruct the search unit and/or search unit positioning device. Figures 5 and 6 give a detailed diagram of the areas inspected and those which were obstructed by the tubes. Note the dimensions used for the actual coverage are for transducer position.
- c. Dutchman Forging-to-Closure Head Dome Weld RVCH-002 has 6 lift lugs which physically obstruct the ultrasonic transducer from performing the required scan. Figures 7 and 8 show the position of the weld and lifting lugs. A detailed diagram of the transducer position for actual -
( and required coverage is shown in Figure'10.
- d. Closure Head Flange-to-Dutchman Forging Weld RVCH-001 has the flange which physically obstructs the ultrasonic transducer from performing the required scan area. Part of the three larger lifting lugs also fall in the required scan area. Figures 8 and 9 show the position of the weld and flange. A detailed diagram of the transducer positicn for actual and required coverage is shown in Figure ll.
- 6. ' ALTERNATE TEST METHOD: None.
- 7. JUSTIFICATION: Completion of the remaining portions of the required examination is impractical and would result in undue hardship without a compensating increase in safety.
The limited Section XI examination, the volumetric examination performed during fabrication, and the hydrostatic test demonstrate an acceptable level of preservice structural integrity. I 1756m(072287)58 1258A l I
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RELIEF REQUEST 2NR10
- 1. . SYSTEM: Chemical and Volume Control, Horizontal Letdown Heat Exchanger.
- 2. NUMBER OF ITEMS: 1 Component Number Weld Number 2CV04AA HLHXC-01
- 3. ASME CODE CLASS: 2
- 4. ASME' CODE SECTION XI REQUIREMENTS: Table IWC-2500-1, Examination Category C-A, Item C1.10 requires a volumetric examination of the regions described in Figure IWC-2520-1 for shell circumferential welds.
Mandatory Appendix'III, Article III - 4000 requires examination for
~
- a. Reflectors parallel to the weld seam, s
The angle beam examination'for reflectors parallel to weld seam shall be performed by a full V path from one side or a one-half V path from two sides of the weld, where ' practicable.
- b. Reflectors transverse to the weld seam.
1). The angle beam examination for reflectors transverse to the weld seam shall be performed on the weld crown on a single scan path to examine the weld root b'y one-half V path in two directions along the weld. 2). For inservice examination, only those welds showing reportable preservice indications need be examined for transverse reflectors. r< 1757m(072287)/70 1260A l
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( 5. BASIS FOR RELIEF: The above listed weld was inspected (. volumetrically by the radiographic method to meet the ASME Section III requirements. In addition, an ASME Section XI volumetric inspection was performed in the axial dit actican for reflectors parallel to the weld seam. The circumferential scan for reflectors transverse to the weld seam could not be performed due to the flange bolting extending over the weld crown. The ASME Section III radiographs could be used to meet the preservice examination requirements except it is not our intent to use radiography inservice. 6,. ALTERNATE TEST METHODS: In lieu of the required ultrasonic examination for reflectors transverse to the weld seam, a surface examination by the liquid penetrant method will be pe rformed.
- 7. JUSTIFICATION: Per ASME Section III, radiography and hydrostatic tests have been completed on this weld. Per ASME Section XI, an ultrasonic inspection for reflectors parallel to the weld seam and an alternate surface examination have been completed. Based upon the results of the above examinations, an adequate level of structural integrity exists for plant operations.
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/ 1757m(072287)/71 1260A L_ _ _ . _ - _ _ _ _ _ _ _ _ . . _ _ _ _ _ _ _ _ _ _ - - - _
Rev. 0 l , s RELIEF REQUEST 2NRll ,
- 1. SYSTEM: Chemical and Volume Control, Excess Letdown Heat Exchanger l
- 2. NUMBER OF ITEMS: 1 Component Number Weld Number 2CV01AA ELHXC-03
- 3. ASME CODE SECTION XI REQUIREMENTS: Table IWC-2500-1, Examination Category C-A, Item C1.10 requires volumetric examination of the regions described in Figure IWC-2520-1 for shell circumferential welds.
Mandatory Appendix III, Article III - 4000 requires examination for:
- a. Reflectors parallel to the weld seam.
The angle beam examination for reflectors parallel to the weld seam shall be performed by a full V path from one side ( or a one-half V path from two sides of the weld, where G practicable,
- b. Reflectors transverse to the weld seam.
- 1) The angle beam examination for reflectors transverse to the weld seam shall be performed on the weld crown on a single seam path to examine the weld root by one-half V path in two directions along the weld.
- 2) For inservice examination, only those welds showing reportable preservice indications need be examined for transverse reflectors.
- 5. BASIS FOR RELIEF: Weld ELHXC-03 received radiographic examination to meet the requirements of ASME Section III. These examinations could be used to meet the requirements of ASME Section XI. However, we do not intend to use radiography as our inservice test method.
/ 1757m(072287)/72 1260A
, Ultrasonic examination of weld ELHXC-03 was limited for approximately 70% of the weld length due to four branch
connections welded to the vessel.
- 6. ALTERNATE TEST MEINOD: In lieu of the required ultrasonic inspection a surface examination utilizing the liquid penetrant test will be performed on the above weld.
- 7. JUSTIFICATION: .The ASME Section III radiograph and hydrostatic test along with the limited ultrasonic examination and alternate surface examination will provide an adequate level of structural integrity for plant operation.
l - (. 1757m(072287)/73 1260A l w_-____-____________
t 2 R v. 0 h '[r' v '. 4 RELIEF REQUEST 2NR12-
- 1. SYSTEM: Steam Generator Vessel (Secondary Side) Nozzles, Residual Heat Exchanger Nozzles' 2.. NUMBER OF ITEMS:.-10 Component Number -Nozzle Number Rer,tricted Exam 2RC01BA SGN-02,03 Inner radii 2RC01BB SGN-02,03 Inner radii 2RC01BC-' SGN-02,03 Inner radii 2RC01BD SGN-02,03 Inner radii 2RH02AA RHXN-01,02 Inner' radii and nozzle to vessel weld i
- 3. ASME CODE CLASS: 2
- 4. ASME CODE SECTION XI REQUIREMENTS: Table IWC-2500-1,
' Examination Category, C-B, Item C2.20 requires surface and
( volumetric examination of the areas described in figure (' IWC-2520-4 for nozzles in vessels over 1/2 inch in nominal thickness. This figure requires volumetric examination of~the nozzle to vessel weld and, for pipe sizes over 12 inches, an examination of the nozzle inner radii.
- 5. BASIS FOR RELIEF: The nozzles listed above contain inherent -
geometric constraints which limit the ability to perform I meaningful ultrasonic examinations. The main steam nozzles (SGN-03's) have an internal multiple venturi type flow : restrictor. This' design does not have a nozzle inner radii as 1 described in Figure IWC-2520-4. This nozzle has seven ] individual inner radii, corresponding to each venturi, none of I which could be examined by ultrasonic examination. The main
*' feedwater nozzles (SGN-02's) also have an internal multiple venturi type flow restrictor but have a thermal sleeve in addition. This design could not be examined due to the geometry of the nozzles internal design. ,
i J J 1757m(072287)/74 ) 1260A *
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9 The Residual Heat Removal Heat Exchanger is approximately 7/8
- in, nominal wall thickness with nozzles of 14 inch diameter and approximately 3/8 in. in nominal wall thickness. The configuration is best characterized as a fillet welded nozzle using an internal reinforcement pad and, thereby, is not analogous to a full penetration butt welded nozzle as shown in Figure IWC-2520-4. In addition, the inner radius of the reinforcement pad would be representative of the nozzle inner !
radius required for inspection. The inherent geometric constraints of the nozzle design prevent the performance of the 1 required ultrasonic examinations of the nozzle-to-shell weld and the nozzle inner radius.
- 6. ALTERNATE TEST METHOD: Ultrasonic examination of the above listed nozzle inner radii is not practicable and the inner radii is not accessable to direct contact for surface e,xamination or even remote visual examination. However, the Steam Generator (Secondary Side) Nozzles have been examined at the point of attachment to the vessel by radiography per ASME Section III, and by surface examination per ASME Section XI. In addition, a system hydrostatic test, at 125% of the design pressure, has been performed in accordance with ASME Section III and a system leakage test, at 100% of the system nominal operating pressure, will be performed each inspection period in accordance with ASME Section XI.
- 7. JUSTIFICATION: The above listed main steam and main feedwater -
(- nozzles are designed with multiple venturi type flow restrictors to limit flow during a Main Steam line or Main Feedwater line break. This design thus enhances the plant's inherent level of safety but does not allow meaningful ultrasonic examination of the nozzles inner radii. However, the increased safety margin afforded by these nozzles makes them a desirable part of plant design. In performing the ASME Section III inspections and the ASME Section XI ultrasonic and/or surface examinations of the point of attachment to the vessel, along with the inservice ; leakage test, an adequate level of structural integrity for l these nozzles is assured for plant operation. { i l 1 l l i I
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( d 1757m(091587)/75 i
Rev. 1 i RE' J EF REQUEST 2NR_1)
- 1. SYSTEM: Reactor Coolant, Safety Injection, Residual Keat Removal
- 2. NUMBER OP ITEMS: 10 Line Number Weld Number Interferrino Condition 2RC21AA-8" 2RC-06-07 Permanent Restraint 2RC21AA-8" 2RC-06-11 Permanent Restraint 2RC21AB-8" 2RC-09-07 Permanent Restraint !
2RC21AD-8" 2RC-15-12 Permanent Restraint 2RC35AA-6" 2SI-02-37 Reducer to Valve 2RC29AC-10" 2SI-09-17 Permanent Restraint 2SIO4D-8" 2SI-11-19 Reducer to Valve 2RC29AD-10" 2SI-13-28 Permanent Restraint 2RC21AB-8" 2RC-09-11 Permanent Restraint 2RY015-6" 2RC-16-01 Nossle to Reducer
)
- 3. A.S.M.E. CODE CLASS: 1
- 4. A.S.M.E. SECTION XI REQUIREMENTS: Table IWB-2500-1, Examination Category B-J, Item B9.11 requires volumetric and surface )
examination of the areas described in Figure IWB-2500-8. !
- 5. BASIS TOR RELIEr: 2RC-06-07, 2RC-06-11, 2RC-09-07, 2RC-15-12, 2SI-09-17, 2SI-13-28, 2RC-09-11 are all encased in permanent whip restraints making preservice ultrasonic examination impractical. The geometry of 2SI-02-37, 2RC-16-01, and 2SI-11-19 prohibit maar.ingful ultrasonic examination.
- 6. ALTERNATE TEST METHOD: A visual examination (VT-2, leak test) is proposed in lieu of the required volumetric examination requirements. The required surface examinations have been performed.
- 7. JUSTIFICATION: In performing a visual examination (leak test) and the required surface examinations an acceptable level of structural integrity for system operation is provided.
Austenitic stainless steel type 304 possesses a high degree of toughness. Crack propagation through this material is slow and leak testing is a viable method of identifying flaws prior to weld failure in this type of material. In addition, acceptable surface and volumetric (radiography) examinations were performed on these welds during construction. Therefore, an adequate ; level of safety can be assured on these welds both now and ) during plant life. l l 1 l t R997aR@02287D/7
4
- t Rev. 0 RELIEF REQUEST 2NR14
- 1. SYSTEM: Residual Heat Removal, Safety Injection
- 2. NUMBER OF ITEMS: 6 Percent of Weld Length Weld # Line # Not Examined Reason for Limited Exam 2RH-01-21 2RH01AB-12" 10% 3/4" Drain Line 2RH-02-30 2RH01AA-12" 10% 3/4" Drain Line 2SI-06-08 2SIO5DB-6" 33% Whip Restraint 2SI-09-13 2SIO9BC-10" 49% Fitting Geometry 2SI-13-12 2SIO9BD-10" 8% Gamma Plug, Valve Geometry 2SI-13-13 2SIO9BD-10" 8% Gamma Plug, Valve Geometry
- 3. A.S.M.E. CODE CLASS: 1
- 4. A.S.M.E. SECTION XI REQUIREMENTS: Table IWB-2500-1, Examination Category B-J, Item B9.11 requires volumetric examination of the areas described in Figure IWB-2500-8 for essentially 100% of the weld length.
-( ~
- 5. BASIS FOR RELIEF: The above listed welds have interfering '
conditions on each side of the weld. These interferences can cause: poor coupling of the transducer, limited movement of the transducer, redirecting of the sound beam and, in some cases, complete restriction of a particular scan. These conditions sufficiently limit the axial scans so as to leave the listed percent of weld length uninspected. , l J I
- 6. ALTERNATE TEST METHOD: All welds received the required j Section XI surface examination in addition to the best effort i ultrasonic examination.
- 7. JUSTIFICATION: The estimates of weld length not examined are extremely conservative and are actually a percent of weld length for which there is less confidence that the entire required weld volume was examined. Based on acceptable surface examinations, acceptable radiographic examinations and a best effort i ultrasonic examination which inspected a majority of the weld length, an adequate level of structural integrity is assured.
j 1757m(072287)/77 1260A l
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l C i f 17S7m(072287)/79 1260A
----_. = _ _ _ _ _ - _ _ _ _ _ _ _ _ _ _ _ _ _ ,
7 _--_ _ - - _ _ - . . , e< $ Exempt Componentn )
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The following tables list those systems / components which have been exempted from examination as specified in ASME Section XI, l subarticles IWB-1220,.IWC-1220 and IWD-1220. These tables contain the following information:
Description:
describes the type of component (s)/ system (s) in'that' table, i.e., Exempt Class 1 Vessels. System: refers to the component (s) and/or system (s) being addressed. , Component
Description:
is the equipment part number of line number ! being exempted. Note, when'the word "All" appears, the er. tire - portion of the system being addressed under " Description" shall be considered exempt. Exemption: identifies the exemption from ASME Section XI which is being applied to the component / system. All exemptions shall be from the 1977 Edition through the Summer 1978 Addenda except when proceeded by.an asterisk (*) which is used to identify the 1974 Edition through the Summer 1975 Addenda. If more than one exemption applies to a specific component or system, all exemptions may appear. The following is a-list of exemptions applied: IWB-1220(b): piping of 1 in, nominal pipe size and smaller except for Steam Generator tubing; components and their Cf - connections in piping of 1 in. nominal pipe size and smaller. IWB-1220(c): reactor vessel head connections and associatcd piping, 2 in. nominal pipe size and smaller, made, inaccessible by control rod drive penetration.s. i IWC-1220(a): components of systems or portions of systems that i during normal plant operating conditions are'not required to operate or perform a system function but remain flooded under static conditions at a pressure of at least 80% of the pressure that the component or system will be subjected to when required to operate. IWC-1220(b): components of systems or portions of systems, other than Residual Heat Removal Systems and Emergency Core Cooling Systems, that are not required to operate above a pressure of 275 psig or above a temperature of 200*F.
.e
'4 . 1757m(072287)/80 1260A i l
IlX:-1220(c): component connections (including nozzles in vessels and pumps) piping and associated valves, and vessels and their supports that are 4'in nominal pipe size and smaller. IWD-A,B,C: component supports, restraints, mechanical snubbers and hydraulic snubbers within the boundaries of systems in Items D-A, D-B and D-C are exempt from VT-3/VT-4 requirements if components are 4 in. nominal pipe size and smaller.
*IWC-1220(a): components in systems where both the design pressure and temperature are equal to or less than 275 psig and 200*F, respectively.
*IWC-1220(d): component connections, piping, and associated valves and vessels (and.their supports), that are 4 in.
nominal pipe size and smaller. All components listed herein'will receive the required system leakage test as specified in the appropriate Table.
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- - - - - - - - - - - - - - - - - - - - - 1 11 - -
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) ) ) ) ) ) ) )
cccc cccb K ((((((((
) ) ) ) ) ) ) ) ) ) ) )
bb cccccccccc ( ( ( ( ( ( ( ( ( ( ( (
) ) ) ) ) ) ) ) ) ) ) ) 1 cccccc cccccbbbt
( ( ( ( ( ( ( ( t ( ( ( ( ( ( C WV E 0000 0000 000000000000 000000 000000000 D E R 2222 2222 222222222222 222222 222222222 I 2222 2222 222222222222 222222 22222272 A RS E 1111 1111
- - - - - - - - - - - - - - - - - - - 11 1 1 1111111111
- - 111 - - -111 - -111- u2- -
BR CCCC CCCC CCCCCCCCCCCC CCCCCC CCCCCCCCC P WWWW WWWW I I I I II I I WWWWNWWWWWWW I I I I I I I II II I WWWWWW WWWWWWWW I I I I II I II I I I I I I g n i p i P T N 2 E N s O l s a O P 5555 555 M 7777 7770 00.33 0 0. 0 000000.0 333333 . 0 33 0.0 0 0.0 0000000 33 . . . . . . . . C C 0000 0004 43 - - - - - - 3 - - 3 - - 3 3223348 - -
- - - - - - - - - - AB - ABCABC - AB - AB - i - - - - - - AB t
p AAAAAAAABCAABCCCDDDEFFGAABEFGCBABCC 91 24592I 1 1 1 1 1I I I1 I 1 1 1 1 1 222222 34S555 m LMMMMNPTTTOO0OOO0OOOOOOOOOOOOOOO000 e VVVVVVVVVVVVVVVVvVVVVVVVVVVVVVVVVVV _ x CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC E 222222222222222222222222222222222 22 n d o n - q h i a t t M l l p E a e i r T a S ceo l ' w c Y i mr - nn s S mut _ oo n s e el n _ s D h oo _ ni . CVC _ od CE
t l i u / n J U E T A D S K R O A ' M
. E V R E
R NM O A I R 2 TG S N ) ) AO S O cc TR A I ( ( SP L C T P , , DE n OC O I M ) ) E bb X ( (
) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) )
cccc ccccccccccccc ccccc cccccccc ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( WV E 00 0000 0000000000000 00000 00000000 DRE 22 22 22222 222222222222 22222 22222222 I 22222 222222222222 22222 222 22222 AS 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 11 1 11111 1 1 1 1 1 1 1 1 RE - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - WW CCCC CCCCCCCCCCCCC CCCCC CCCCCCCC BR CC P _I I WWWWW WWWWWWWWWWWW WWWWW WWWWWWWW I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I g n i p i P T N 2 E N s O s P l a M 00 O 0 0 40.0. 00 0.4 0000.0 00000
. . 3333 . 33332 2
- 0. 0 22 0 0.0 00000000
. 22221 1 1 1 C C 4223 - - 433 - - - - - - - - 3 - - - - - - - -
- - - - AA - - - ABAB - ABABAB - AB - ABCDAUCD t
p ABCAABADEFFAABCCAAAABAABCCCCDDDD 6667 8 8 99999000002233344 4 4 44 4 4 4 4 4 - m OOOOOOOOOOO1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 e VVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVV x CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC E 222222222222222222222222222222 2 2 n d o n h a q i I t t l a i p Dl T a l e r S ceo - w c Y i mr nn s S mut oo e el n x ms D h oo mi CVC od CE
~ t l i u n J U .
E T A D S - K R O A I
. D V R E
R NM OA R 2 I TG S N ) ) ) ) ) ) ) ) ) ) AO S O c c c ccccccc TR A I ( ( ( ( ( ( ( ( ( ( S P L T C P , , , , , , , , , , _D E M ) ) ) ) ) ) cc cccc
) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) )
O .OC E X ((((( ( cccccccccccb bccccb ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( bbbbbbb ( ( ( ( ( ( ( O I E 00 0000 000000000000 000000 0000000 WR V 22 2222 222222222222 222222 2222222 D E I 22 2222 222222222222 222222 2222222 AS 11 1111 1 111111111 11 111111 1111 1 1 1 RE - - CC CCCC CCCCCCCCCCCC CCCCCC CCCCCCC BR P WW WWWW IWWWWWWWWWWWW WWWWWW WWWWWWW II III I II I IIIIII II II IIII I I I I I I I g n i p i P T N 2 E N - s O 55 55 5555 55555 5550000 s P 00 0077 55 577777 7775555 l a M O 22 2200 7 700007777.77 7.00000 0001 11 1 0022220000 C C - - - - - - - - - - - - - - - - 00 0 - - - - - - - - - - - - ABCDABCDABCDABCD - - - ABCDABCDA3CD t p EEEEBBBBCCCCDDDDEFBBBBBCCCCDDDD 4444555555555555556666666666666 m 11 11 1 1 11 11 1111 11 1 1 1 1 1 1111 111 1 1 1 e VVVVVVVV E x CCCCCCCCC"VVVVVVVVVVVVVVVVVVVVVV CCCCCCCCCCCCCCCCCCCCCC 2222222222222222222222222222222 n d o n h i a t t p M l . E G-l a e i r T a S ceo l ' w c Y i mr nn s S mut oo e el n n s u D h oo ni od CE
- CVC
p t i n l J u U E T A D - S K R 0 A M 1 V R E R NM O I R A 2 TG S N )) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) AO S A O cc cccc ccccc c cccc c TR I ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( SP L C T P , , , , , , , , , , , , , , , , , DE M ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) A.. OC ! 0 bb ( ( bbbb bbbbb ccbcccc ccbbbb ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ccb O I D 00 ( ( ( WR V I 22 0000 0000000000000 00000 000 D E 22 2222 2222222222222 22222 222 I 2222 2222222222222 22222 222 A RS E 1 1 11 11 11 11 1 11 1 11 111 1 1 11 1 1 1 1 BR CC CCCC CCCCCCCCCCCCC CCCCC CCC P - WWI I WWWW WWWWWWWWWWWWW WWWWW WWW I II I I I I I I I I II III I I I I I I I I I
~
g n i p i P T N 2 E N s O 55 55 5 5 5 s P l a M O 0000 7777.00000000007070 5 7 7. 5 0 007 75 5 7.7
. . . 0 55 70 C C - - - - 23223343230303 - - 1 00 - 002 t ABrD EE1
- - - - - - - - - - - - - - AA - - - A - - -
EF1 JBCABAABAAAAAAAAAAAAB 1 p 66666667788 9001 267 8 91 23567 7 m 1 1 1 1 1 1 1 1 1 1 1 l 222222223333333 e VVVVVVVVVVVVVVVVVVVVVVVVVVV E x CCCCCCCCCCCCCCCCCCCCCCCCCCC 222222222222222222222222222 n d o n h i a - g t l a t i p M E T a l l e r S ceo w c Y i mr nn s S mut
'- oo e el n n
u s D h oo ni CVC _ od CE
t l u Q i U n J
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. E V R E
R NM O A I R 1 TG S S N O
) )
c c
) ) )
AO ccc TR A I ( ( ( ( ( S P C L T P , , , , , DE M ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) )) D OC E cb X ( ( b O I ( (ccc( ( cccccbbbcccc ( ( ( ( ( ( ( ( cccccc ( ( ( ( ( ( ( ( ( ( (cc ( WV E 00 0000 000000000000 000000 00 D R E 22 22 2222 222222222222 222222 22 I 2222 222222222222 222222 22 RS A 11 1 1 1 111 1 1 1 1 111 1 1 1 1 1 1 1 1 1 E - - - - - - - - - - - - - - - - - - - - - - BRP CC WW CCCC CCCCCCCCCCCC CCCCCC CC II WWWW WWWWWWWWWWWW I I I I II I I I I I I I I I I I I WWWWWW I I I I WW I I g n i p i P T N 2 E N s O 55 555 5 55 55 s P 77 7770 0000 l a M O 00 00022 0000000.00 2222 332222 . . 02 7 0. 0. 77 00 77 00 C C - - - - - - - - - - - - - - - - - - - t AAAAAABABABAB - - ABCDAB - ABCD AABABAABBCCDDEABBBBAAAAAAA p 8001 1 22 222222 2333334 4 58888 m 34 4 4 4 4 4 444 4 44 4 44 44 4 4 44 4 4 4 4 e VVVVVVVVVVVVVVVVVVVVVVVVVV E x CCCCCCCCCCCCCCCCCCCCCCCCCC 22222222222222222222222222 n d o n h i a t t M p R l a e i r E T a l l S ceo w c Y i mr nn s S mut oo e el n ms D h oo mi CVC od CE
-p t i n l J u U E ' T A D S K R 0 A
.- M E
~
V R E R
=
NM O I R A 2
~ -
TG S N ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) AO S A O cc cccc cc ccccc cc cccc c TR I ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( S P L C T P , , , , , , m DE M ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) OC I E bb X ( ( bbbbb bccbbbbbcccc bb ccc ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( cbbbbcb O E 00 ( ( ( ( ( ( ( WV 00000 000000000000 00000 0000000 D I E R 22 22 22222 222222222222 22222 2222222 22222 222222222222 22222 2222222 A RE S 11 11 1 1 1 1 11 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 1 1 11 1 CC B.PR WW CCCCC WWWWW CCCCCCCCCCCC CCCCC CCCCCCC WWWWWWWWWWWW WWWWW WWWWWWW I I I I I I I I I I I I I I I I I I I I I II I I I I I I I I g n i p i P T N 2 E N s O 5 5 5 5555 s P 7 55 57 557777 55 0 5 l a M O 0. 0 7.0000 0 . . . 07707377
. . . . . . . . . 0000 7700 0.000700 3 3 . . . . . .
C C 2 - 2333 40030000 - - - - 0023 - - 21 2021 A A - - - - - - - - - - - - ABAB - - - - A B - - - - - - t p AAAABAAAAAAABAAAAAAAAAABBABBAB8 901 2234534788 9022 337 890001 24 8 90 m 455555556666667 7 7 77 7 77 8888888 8 9 e VVVVVVVVVVVVVVVVVVVVVVVVVVVVVVV E x CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC 22222222222222222222222222 222 22 - n d o n h i a q t l a t i p M E T a l l e r - S ceo w c Y i mr in s S mut
' mos D e el n h oo
- i CVC C( Ed l
8 2 y t l - O i u
- n J U
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. E V R E
R NM OA 2 I R TG S N ) ) ) AO S O c c c TR A I ( ( ( SP L C T P , , , sE i ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) O L C I D X bb ( ( bbbb ( ( ( ( b ( b ( cccccccccc ( ( ( ( cccccccccc ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( WV E 00 0000 0 0 0000 000000 0000000000 D R E 22 22 2222 2222 2 2 2 2 2222 2222 222222 2222222222 I 22 2222 2222222222 A S 11 11 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 RE CC CCCC DR WW WWWW C C CCCC WWWW CCCCCC CCCCCCCCCC P I I I I II W I W I I I I I WWWWWW WWWWWWWWWW I I I I I I I I I I I I I I I I g n i p i P T N 2 E , N s O - 555500 0050505050 l s a P M 00 O 00.00 88 . . 0000 4444 7 . 777 55 5575757575 000000 0000000000 C C 28 - - 88 - - - - - - - - - - - - - - - - - - - -
- - AB - - ABCD ABCDAA AAABABABAB t
p 0A BBCA AAAA AAAAAB CDEEFFGG1 1 1 1 4 8 8 8 8 9 6 66 6 7 7 7 7 33 333333 33 33 m 99 9999 00OO 0OOO1 1 1 1 1 1 1 1 1 1 1 1 e VVVVVV l l HWWWHWWWWMHHWHWMHWMW x CCCCCC l l E E E FE F FE E E E E E E E E E E E E E 2 22222 A A 22222222 2222222222 22 n d o n h i a n m t l a t i p M E T a l l l o op i t o t r e e r S ceo P u c a w nn c s Y i mr n e w S mut l a et nd eo e el n ee r o ie D mis od . h oo CVC ul PC i r FP ae MF CE
, t l i u n J U
E T A D S K R O A M
. E V R E
R NM O A I R 2 TG S N AO S O TR A I SP L C T P - DE M ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) . D: OC O I E X cc cccc cccccccccccc cccccc ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( E 00 0000 000000000000 000000 ccccccccc ( ( ( ( ( ( ( ( ( WV 000000000 D R I E 22 2222 222222222222 22 2222 222222222222 222222 222222 222222222 222222222 AE R S 11 1111 1 1111111111 1 111 111 1111111 1 1 BR CC CCCC CCCCCCCCCCCC CCCCCC CCCCCCCCC P WW WWWW WWWWWWWWWWWW WWWWWW IWWWWWWWW I I I I II I II IIIIIII I I I II I II II I I I I I I g n i p i P T N 2 E N s O 00 0050 505050000050 505050 500505 _ s P 55 5575 757575555575 757575 755757000 a M l O 00 0000 000000000000 000000 0000001 11 _ C C - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - _ AA AAAB ABABABAAAAAB ABABAB ABBABBABC t p AB CDEE FFGGHHABCDEE FFGG1 H 1 EEFGGHAAA 4 4444444444455555555555544 4 44 4666 _ m 1 1 11 1 1 1 11 11 11111 1 11 1 1 1 1 1777777 777 e W W W W W WWWWWFWWWWWWWFWWWWWWWW5 _ E x F 222222222222222222222222222222222 WWWFWFWWFW _ n _ o _ h i r _ t t M -Q l a i p E T e t ' - e r S a w c Y w nn oo s S nd e ie ms D ae mi MF od CE
_ n J U . E T A D S K R O A M
. E V R E
R NM O A I R 2 TG S N AO S O TR A I S P L C T P DE M ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) cccc ccccccccccccc ccccc cccccccc OC E ccc X ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( O I E 000 0000 0000000000000 00000 00000000 WV DRE 222 222 2222 2222222222222 22222 22222222 2222 2222222222222 22222 22222222 I A S RE 111 1111 11 11111111 11 1 11111 111 1 111 1 BR CCC CCCC CCCCCCCCCCCCC CCCCC CCCCCCCC P WWW II I WWWW WWWWWWWWWWWWW WWWWW WWWWWWW I II I I I IIIIIII I I I I I II I I I I I I I I I I g n i p i P T N 2 E N 5555 s O 0000505 05050 77770000 s a P M 0' 00 0000 0000005555757 57575 00004444 l O 133 3333 3333330000000 00000 - - - - - - C C - - - - - - - - - - - - - - - - - - - - - - - - - DAB CDAB CDABCDAAAAABA BABAB ABCD>ABC AAAAAA7 t p AAA AABB BBBBBBABCDEEF FGGHH 1 1 11 22 22 622 2222 2277771 111 1 1 1 1 11 1 1 00000000 m 7 8888888888889999999999991 1 1 1 1 1 1 1 e WW W W W W E x NWWWWWWWFFWWFWFWWFWWWWWFWWWWWWWWW 222222222222222222222222222222222 n o h i t t i r l p D e a i T t e r S a w c Y w nn s S nd - oo e i e n u s D ae ni MF
' od CE l
f t i U n S K R A M E R 2 S S A L C NM OA I R T G N AO O TR I S P T P DE M ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) n OC O WV I R D E E X E cccc cccccccccccc cccccc ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( 0000 000000000000 000000 2222 2222222222222 22222 ccccccccc ( ( ( ( ( ( ( ( ( 000000000 222222222 I 2222 2222222222222 22222 222222222 A RSE 1111 1 1 11 111111111 11 1 1 1 111111 1 1 1 B CCCC CCCCCCCCCCCCC CCCCC
-R CCCCCCCCC P WWWW WWWWWWWWWWWWW WWWWW WWWWWWWW IIII I I III I II IIII II II I I I I I II I I I I g
g n i p i P T 7 N g E N 5555 555500 055555555 g C O P M O C 0000 000000007777 777700 4444 444444440000 000022 EFGH JKLMNPQRAAAA AAAAAB 077777777 200000000 CABCDABCD AAAA AAAAAAAAABCD ABCDAA AAAAABBBB g 222222222222 0000l1 1 1 444 88S88888 0000000000001111l11122222222222 1 1 11 1 1 1 1 1 1 1 1 111 1 i 1 1 1 1 1 1 1 1 1 1 1 1 1 1 g W WWWWWWWWWFWWWWWWWWWWFWWWWWFFFW W WWW E 2222222222222222222222222222222 n o h i t t M r m l a e i p r E T S e t a w c Y w nn s S nd
' oo g e i e n
u s ae ni MF od y CE
,l
_ i _ n _ U S K R A M E R 2, S S A L C NM O A I R TG N ) AO O c TR I ( SP T P , - O DE M ) ) ) ) ) c cccc
) ) ) ) ) ) )
ccccccc
) ) ) ) ) ) ) ) ) ) ) ) ) ) )
c ccccc cccccccc OC E X ( ( ( ( ( b O I E 0 0000 0000000 ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( WV 0 0 00000 00000000 DR I E 2 2222 2222222 2 2222 2222222 2 2 2 2 22222 22222222 22222 22222222 A S 1 1111 111 1 1 1 1 1 1 111 11 1 1 1 111 1 1 RE - - - - - - - - - - - - C CCCC CCCCCCC C C CCCCC CCCCCCCC BRP W WWWW WWWWWWW W W WWWWW WWWWWWW I IIII I I I II I I I I I I III I I I I I I I I g n i p i P T 7 N
- g E N 5 5555 555 g
O 7 7777 7775555 555555 P 7777 0 00000 00777777 M 0 0000 000 O - - - - - - - - 0000 4 44433 33000000 C C A BCDA BCD - - - - - - - - - - - - - - - - - C CCCD DDDAAAA A BCDAB CDABCDAB FFFFAAAAAAAAAA g 888888 8801 23 222222224444 1 1 11 00001 1 11 88 1 11111 1 1 1 1 1 1 00002222222266 W W l SSSSSSSSSSSSSS E g WWWFWFWWWWWW 222222222222 l MMMMMMMMMMMMMM 22222222222222 A. n o h i t m t t M r n a O l a i p E T e t e m t e e r S a u S w c Y w r nn oo s e S nd i e t sr i n' n s s g ae ni a ni MF I A M od , CE y
t l i u _ ( t.. U n J E T A D S - K R O A
'. M E
V R E R t M GA I R 2 TG S N AO S O TR A I SP L T p- ,O DE C C P M E
) ) ) ) ) )
c ccccc
) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) )
cccccccccccc cccccc
) )
cc O I X ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( WV E 00 0000 000000000000 000000 00 DR E 22 2222 22 2222 222222222222 222222 222222222222 222222 22 22 I A RS E 11 1111 11111111111 1 1 11111 11 B- RP CC CCCC CCCCCCCCCCCC CCCCCC CC WW WWWW WWWWWWWWWWWW WWWWWW WW II I I I I IIIIIIIIII I I I IIIII II g n i p i P T N 2 E N s O 55 0000 000055555555 555555 55 s P 77 5555 555577777777 777777 77 a M l O 00 0000 00000000000D 000000 00 C C - - - - - - - - - - - - - - - - - - - - - - - - - - CDAAAAAAAAAAAAAAAAAAAAAAAA t p AAABCDJKLMABCDABCDEFGHJKLM 8B000000001111222 222222222 m 6677 7777777777777777777777 e SSSSSSSSSSSSSSSSSSSSSSSSSS x MMMMMMMMMMMMMMMMMMMMMMMMMM E 22222222222222222222222222 n qi h t l a i t i o p I D T md ae eu t n
) '
e r S Si , w c Y t nn s S nn oo e io n u s D aC mi M( od CE
i u _ n J U E _ T A D S , K R O A M
. E V R E
R NM O I R A 2 TG S N ) ) ) AO S O c c c TR A I ( ( (
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, , , )
DE M ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) c ) OC E cc ccccc cccccccc,c b b b ( c O I X ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( WR V E 00 00000 000000000 0 0 0 0 00 D E 22 22222 222222222 2 2 2 2 22 I 22 22222 222222222 2 2 2 2 22 A RS E 11 11 1 1 1 111111111 1 1 1 1 11 BR CC CCCCC CCCCCCCCC C C C C C P WW WWWWW WWWWWWWWW I I I I I II IIIIIII I I W I W I W I W I W I g r n i p i . P T N 2 E N s O 00 55555555 s a P M 44 0 0 0. O. 0 0.77777777 444 44 4 . . . . . . . . 55 77
. l O - - - - - - - I - 00000000 00 C C AB CDEFG I - - - - - - - - -
AAAAAAAAABCDEFG1 1 AB t 222222 2277777777 AA p 444444 4488888888 66 m 1 1 1 1 1 1 1 111 1 111 1 1 00 e 0SSSSSSSSSSSSSSS l l l l CC x MMMMMMMMMMMMMMMM l l l l RR E 2222222222222222 A A A A 22 n o h i m g t t p M a e n nn g l E oi a i T t e s sir sn rt e r S S g a st o si o w c Y o G eat el t nn s S n r cii cp c oo e i t f od n om a
ms mi D
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f O rao PRM r a PS R e od CE
i u g n J U E T A D S K R O A
. M V R E
R NM O I R A 2 TG S N AO S O T SR P A L I T C P DE n OC O I WV M )c( )c X
)c )c )c )c )c )c )c )c )c )c )c )c )c )c )c )c )c )c )c )c )c )c )c ()c( )c
( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( E 000 0000 000000000000 000000
)c )c )c )c )
( ( ( ( ( ( 00000000 D E R , 222 2222 222222222222 222222 22222222 I 222 2222 222222222222 222222 22222222 A R E S 111 1111 1111111111 1 1 1 111 11 111 1 1 1 1 1 BR CCC CCCC CCCCCCCCCCCC CCCCCC CCCCCCCC P WWW III II II WWWW WWWWWWWWWWWW I I I I I IIIII I I I I I I I I WWWWWW WWWWWWW II I I I I I I g n i p i P T 2 W N s O 555 5555 555555555555 555555 55555500 s P 777 7777 777777777777 777777 77777755 a M 33 l C O 0 3. 0 C - - - - - - - 0000 . 0000 3 3. 0 0 0 0 000000 O0000000 t p ABA ABCD BBA AAAA ADABAB - - AAAA AAAAAA BBAAAABAABCD EFGHJK MAAAAAA I MNPQRBC 66755555555222300000000000000001 1 m 00011 1 1 1 1 22333344444444 444444 44 44 e CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC x RRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRR E 222222222222222222222222222,222222 n o h i t t l a i p M T rt e r S on w c Y t a - nn s S cl oo e ao ms D eo *
'- mi RC od .
CE
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R NM O I R A
- 2 TG S N AO S O T A SR I
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) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) )
cccccccccccc cccccc
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ccccc O._ OC O I I X ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( E 000 0000 000000000000 000000 ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( 00000 WR V 222 2222 222222222222 222222 22222 D E I 222 2222 222222222222 222222 22222 A RE S 11 1 1111 111111111111 11 1 11 1 11 111 B- R CCC CCCC CCCCCCCCCCCC CCCCCC CCCCC P WWW I II IIII WWWW WWWWWWWWWWWW I I I I I III IIII I I I I I I WWWWWW WWWWW I I II I g n i p i P T N 2 E N 5 555 s O 005 5 7 777 555555 s l a P 557 7003 M O 000 0110 3 000 3 3.75777777.55 000000 00 000000 555555 00000 55555 C C - - - - - - - - - - - - - - 00 000000 00000 AAA AABA BCD - ABCDAB - - - - - - - - - - - - - t p FGABAAAAAAAAAAAAAAAAAAAAAAAAAA 11 2244888895555662345678901 234 m 4444444444 45555556666666677777 e CCCCCCCCCCCCCCCCCCCCCCCCCCCCCC x RRRRRRRRRRRRRRRRRRRRRRRRRRRRRR E 222222222222222222222222222222 n o h i t t M
% l a
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) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) )
DE M ) ) ddddddddddddddddddddddd - O ,O I OC E X b ( b ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( 00000000000000000000000 WV E 0 0 22222222222222222222222 _ DR E 2 2 2 2 22222222222222222222222 111111111 1111111111 11 1 1 I A RE S 1 1 CCCCCCCCCCCCCCCCCCCCCCC BR P C W C W WWWWWWWWWWWWWWWWWWWWWWW IIIIIIIIIII III III II II I I _ I I * * * * * * * * * * * * * * * * * * * * * . g _ n _ i i p P T N 2 E N s O 55555555 55 555555 s P l a M O 7777777700007700.0 0000000033330022 . 777777 000000 C C - - - - - - - - - - - - - - - - - - - - - ABAAABABABABABAB - AAAAAB t p AAABAAAAAACCAAAABABBDAA m 5566778800001 1 333667799 - OO0OOOOO1 1 1 1 1 11 1111111I 1 e l l I I 1 I I I I I l l l HI HHI 1 l l I I il I x l l I I 1 I I I I I i i i RRRRRRRRRRRRRRRRRRRRRRR I 1 iiI I I - E A A 22222222222222222222222 7
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