ML20195J919
| ML20195J919 | |
| Person / Time | |
|---|---|
| Site: | Vogtle  |
| Issue date: | 11/11/1988 |
| From: | GEORGIA POWER CO. |
| To: | |
| Shared Package | |
| ML20195J911 | List: |
| References | |
| ISI-P-010, ISI-P-10, NUDOCS 8812050093 | |
| Download: ML20195J919 (16) | |
Text
, - _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ . _ - - - - - - - - - - - - _ _ _ _ _ _ _ _ _ _ _ - - - - _ _ _ _ _ _ . _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ - - - _ - _ _ _ _ _ _ _ _ _ _ _ _ _ _ . - - - _ - - - - - _ _
SOUTHEid CCMPA.Tl SERVICES
,q Q INSPECTION, TESTING, AND ENGINEERING SECTION FOR GEORGIA PCWER COMPANY ISI-P-010 PM: SERVICE INSPECTION PROGRAM VOCTI.E EE.ECTRIC GENERATING Pt. ANT UNIT 2 SCS GPC s '
5UPT REV OATE DESCRIPTION PREP'O REV'O DEPT REV'O PLANT PLANT BY BY MGR BY ENG MGR 0 4/19/84 Issued for PSI gg (S [ MP 11/17/86 General Update; Revised to 1983
[
won W l'Ir.vt It'l7h # '? /114 ' P ""/-
Y [/T'
//'
/ W 1 O tolv u,4 /4/A I Edition i i
i Clarified Reactor p pfC If0[" N W /fc/l.1/
2 10/1/87 Vessel Exams. ,,.,.,7 #+57 reA/sur @f/h tellilo N/u/fr General Incorporated Update; Re lief gaf g INAju N
M. 1., . g,%t)7 i 3 7/25/88 Requests "* 7 2.5-f95 7/15/'7 '"I
- 3/f/j9
" II#II/
Add Relief Req. 46 d4V TM 7MA E 'lO' L J I L#M h Sydd8d n i/-//-s "'U'*# <t/hff n.n.n nla)d /s0//ft !
O !
I SS10050093 DR es113o ADOCK 050004M ex
. . t L
. i t , ,
i*
RR-36 Volumetric exas of Class 2 thin-wall piping O' RR-37 Volumetric exas of small-diameter Class
! 2 piping ;
l RR-38 ASHE Section XI: S'absection INE t
i RR-39 Hechanized volumetric examination of pressure-retaining shell and head welds f in reactor vessel outside the beltline region !
i i
RR-4E Notch length in Basic Ultrasonic ,
Calibration Blocks for examination of ,-
vessel welds
[
l l RR-41 Use of a centrifugally-cast stainless i
{ steel (SA-351 CF8A) piping calibration I block for the mechanized examination of
- j the reactor vessel nozzle to safe-end s welds '
RR-42 Volumetric examination of nozzle inner '
1 radius section for steam generator inlet ;
and outlet nozzles 4
() RR-43 Volumetric examination of staan generator channel head to tube sheet i
~
I weld :
! I i RR-44 Visual examination of NSCW and NSCW f
! transfer pump integral attachments and l component supports }:
1 l I RR-45 Use of IWB-3500 Evaluation Table in 1983 !
l Edition of Section XI !
I r
! RR-46 Pressurizer integrally welded attachments l I 1
i i
i
\
i i
a
} !
( ]) -
I i
6-3 010 Rev. 4 {
f
9 yJ_q1-2
() RR-9 .
Component or Rellet Area Pressure-Retaining Solting, greater than 2-inch diameter, in Class .. Reactor Pressure Vessel Studs ID Nos. 21201-V6-001-801 through 21:01-V6-001-B54 and spare studs 90S-1 and 808-2.
Requirement tron which Pelle! is Requested Item BC.30, Category B-G-1, AS!!E Code, requires sur: ace and volumstric examinations of Reactor Pressure Vessel studs wnen removed. Paragraph IWA 2232 (c) requires that the ultrasonic examination me'et the requireme.its of ;
Article 5,Section V.
Basis for Relief A tore sensitive examination, wherein a shear-wave transducer is lowered into the heater hole in the center of the stud, has been developed. The calibration block contains 3 notches which were Electrical Discharge liachined into the thread area with the following O approximate dimensions:
Notch No. Length Width Depth 1
2 0.942" 0.487" 0.089" 0.089" 0.060" 0.106" lI 3 0.?S7" 0.089' 0.148" This calibration technique was used in lieu of the ;
required bottom hole technique.
The Code required surface examination was completed. ;
Alternate Exanination The more sensitive shear-wave examination, as described !
above, was used.
i l
t i
l i
r 6-13 010 Fev. .
f (m .
b V -
VECP-2, RR-17 Attachment 1 Code Percentage Component ID Catenory Descriptton Examined Pestricttoe 21201-001-5 3-J 31" Elbow to Steae Generator Nozzle 50s 20n4 Exas from elbow side Os from nozzle side due to l
nozzle geometry.
21201-002-5 B-J 31" EIbaw to Steen Generator Nozzle 504 1004 Emas from elbow side Os f mm nozzle side due to nozzle E?ometry.
21201-003-5 B-J 31" Elbow to Steae Generator Nozzle 504 1004 Exas from ellwm side Os froe nozzic side due ta
- nozzle geometry.
21231-004-6 B-J 31~ Eltow to Steen Generator Nozzle 50s 1004 Exam from elboas side Os from nozzle side & c to nozzle geometry.
21201-005-J B-J 31" Steam Generator Mozzle to Elbow 504 1004 Exam from ciboer side 04 from nozzle side due to nozzle geometry.
21201-069-1 B-J 31" Steen Generator Noz:;;1e to Elbow 504 1004 Esae free elbow side 04 from nozzle elde due to nozzle geometry.
21201-007-1 B-J 31 Steme Generator Nozzle to Elbow 504 1004 Exce free elbow side 0% from nozzle side due to nozzle geometry.
21231-006-1 3-J 31* Stese Generator Nozzle to Elbow 504 1004 Emme troe elbow sloe l Os free nozzle side due to mozzle geometry.
4-29 010 Rev.4
f F
() VEGP-2 RR-24 i
Component or Relief Ares l Volumetric examination of pressure-retaining Reactor
! Coolant Pump Inlet nozzle to elbow welds and outlet nozzle i to pipe welds. (Class 1) See Attachment 1 for examination identification numbers.
Requirement from which Relief is Recuested Item 59.11, Category B-J, Table IW5-2500-1, ASME Section XI, requires surface and volumetric exarinations of l circumferential piping welds that are 4-inches or larger 1 in diameter. The rqquired examination volume is shotrn in Fig. IW5-2500-8. i.elief from total volumetric coverage is ,
i requested. '
i Basis for Relief All welds were ultrasonically examined 100% from the elbow 3 or pipe side using the centrifugally-cast piping technique
(} es discussed in RR-22 and RR-23.
Partial examination is possible from both nozzle sides near the weld since the surfacen are parallel to each
, other. However, full-coverage is not possible because of
! increasing taper with increasing distance from the weld. ,
l -
The code required surface examination has been performed.
The ultrasonic examinations were performed to the extent
- indicated in Attachment 1.
, Alternate Examination ,
i ;
', None l ($ )
6-40 010 Rev. 4 ,
p ~, ,/---- ,~
\ w _.
Code Fercentage Ide-tification No. Category MaterInl Deerrlption Examined Restriction 21204-127-9 B-J SA-376 10" Pipe to Elbow 100% N/A 21204-127-10 B-J SA-376 10" Elbow to Pipe 100% N/A 21204-127-11 B-J SA-376 10" Pipe to Elbow 100% N/A 21204-127-12 B-J SA-376 10" Tee to Pipe 88% Geometry of Tee 21204-127-13 B-J SA-376 10" Pipe to Tee 50% Geometry of Tee 1 21204-127-14 B-J SA-376 10" Tee to Pipe 50% Geometry of Tee i 21204-127-15 B-J SA-376 10" Pipe to Elbow 100% N/A 21204-127-16 B-J SA-376 10" Elbow to Pipe 100% N/A 21204-127-17 B-J SA-376 10" F1pe to Elbow 100% N/A 21204-!27-18 B-J SA-376 10" Elbow to Pipe 100% N/A 21204-127-19 B-J SA-376 10" F1pe to Valve 50% Geometry or valve 21204-127-20 B-J SA-376 10" Valve to Pipe 50% Ge6 metry of Valve 21204-127-21 B-J SA-376 10" Pipe to Elbow 100% N/A 212J4-127-22 B-J SA-376 10" Elbow to Branch Connection 100% M/A 21204-122-6 C-F SA-312 10" Pipe to Valve- 50% Geometry of Valve 6-50 010 Hev.4
i
'~^)
5 VEGP-2, RR-29 Attachepet 1 -
Code Percesta,u?
l e tiffratton No. Category Descriptton 2cstrictson Examineet 21231-86-001-WOI C-A Upfer Need so Upper Shell Barrel 984 4 Welded plates restrict i "D" .Wid access to part of eseld l 21201-86-003-WO5 C-A Looser Lone End Stub Barrel to Losser 90% Observation ports restrict Shel1 Beerel "B" Weld access to part of eseld 21201-96 004-WO7 C-A Loeser She11 8 tai re! "A" to Tube Plate Weld 944 Observation ports and coupling restrict access to part of eseld 6-54 ::s gey,4
4 l
l l VEGP-2
() RR-30 Conconent or Relief Area Volumetric and/or surface examination of pressure-retaining welds in Class 2 vessels (or components). Specific examination identifications are shown in Attachment 1.
Reauirement from which Relief,is Raouested Item Nos. C1.10, C1.20, and C1.30, Chtegory C-A, Table IWC-2500-1 of ASME Section XI require volumetric examination of
, precsure-retaining welds in Class 2 pressure vessels.
1 Applicable examination volumes are shown in Fig. IWC-2500-1, and 2 and includes essentially.100% of the weld length.
Iten No. C6.10, Category C-G, requires surface examination of pressure-retaining welds in Class 2 pumps. The
! examination area is shown in Fig. IWC-2500-8 and includes
! 100% of the weld length. Actual examinations and their
] extent of coverage are listed in Attachment 1. (See RR-31).
)
Basis for Relief l
Access limitations due to geometric configuration of the 1 3 welded areas, rianges and supports restrict coverage of s/ required examination volums and areas. The actual a restriction for cach weld is shown in Attachment 1.
i The maximum percentage possible of the required ultrasonic examination was completed. The Code required surface examination was completed to the extent possible on the Safety Injection Pump.
Alternate Examination None 6-55 010 Rev. 4
9 VEGP-2 RR-31 Component or Roller Area Ca).ibration blocks used to perform ultrasonic examination of austonitic welds in thin-walled vessels (nominal wall thickness 2 inches and less). The following vessels are affected:
RHR heat exchanger 21205-E6-002 Letdown heat exchanger 21208-E6-003 Letdown reheat heat exchanger 21208-E6-007 Excess letdown heat exchanger 21208-E6-002 Regenerative heat exchanger 21208-E6-001 Suction desponer 21208-V4-001 Discharge pulsa c lon dampener 21208-V4-002 Hequirement from which Relief is Requestod Paragraph IWA-2232, ASME Section XI allows the use of the applicable requirements of Article 5 of Section V for the ultrasonic examination of class 1 and 2 vessel welds in material other than ferritic steel. However. Article 5 O' does not provide specific guidance on how to perform these examinations. Aelief is requested for modification of these requirements to allow the use of Section XI.
Appendix III and to evaluate any non-geometric reflectors l to the requirements of INB-3514. (see RR-30). l Bagis for Relief ASME Code Section V. Article S. does not give complete guidance for performing ultrasonic examinatiori of austenitic weldG. However, paragraph T-548 does give permission to modify or supplement the provisions of this article. Therefore. the ultrasonic e:tamination of austenitic vessel welds was performed in accordance with Appendix III of ASMT Section XI, and the calibration blocks were dectgr.ed in accordance with Fig. T.547.1 lprovtsion for 10%T notch depth) and Fig. T-546.1 (provision for side-drilled holes).
In addition T-543.3.1 allows the use or a flat besic calibration block where the examination surface is greater than 20 inches in diameter. T-543.3.2 allows the use or a single curved basic calibration block on examination
- ourfaces in the range of curvature from 0.9 to 1.S times r- the basic calibration block diameter.
NJ 6-57 010 Rev. 4
s .
3 G o .G 2
.4 W W H +4 u s
AW e e es .
o
,a
.4 0 n.
['
> .. . ., .ha *
\' 3 z U
o GW GA .a 4 mo w o ee 0 o W M4 in 4 to W G V
a L
G 0 0W WW
> 3 > 3 > 3 w -g C 4V et M 9 1 1
- L > G >NU > U i % V J i 5 r* E ** 5 =*
va o '.1 o .1
= W
. M 4y 4
H \'
1 . .* . ,. #
l 3 3. 9 :- 3 C.
1 t t a
I b
I E 1
- i. ?'
~
k'
= 3 ,a .
'J A A Q t 4 43 4 l ?
1 0 r v 1 A 4
4
" d L' O e > > 2
% .4 .* g l X 1 1 -
4 > >
- f e, C ) O I
( A <
qu
,1
.O L
W W
O B H
> aC a **
- 1 >
s.
-* A A **
4 m W b' -
t 4
- d. t 8
J e % b D a
} h N H I
i w
v 4 Id4 6 b U 6 i e U U U 4-
, U f t
?
6 A
=s g $ M e ~ a >i t i i U *f e N
+<
g Q D .
I
- +i G
6 e
'i W e'4 e4 mi C
R D S e m m .
T H H =4 m N N N
() VEOP-2 RR-35 component or Relief Area Volumetric examination or pressure retaining welds in thin-walled (less than 0.5 inch wall thickness) piping and small-diameter (down to 2-inch diameter) piping. In the 1983 ASME Code through S'83 Addenda, these lines are exempt due to size or pressure and temperature. However, as a condition of licensing, Jeorgia Power company agreed to accomplish volumetric examinations on a minimum of a percent of the welds in the engineered-safety systems.
Requirement from which Relief ic Requested ASME Code Section XI, Article III - 4430 requires that the examination shall be performed using a sufficiently long ;
examination beam path to provide coverage of the required examination volume in two beam-path directions. The examinations shall be performed from two sides of the weld, where practicable, or from one side cf the weld as a minimum. Article III -
4430 requires that the angle beam l lO examination for reflectors transverse to the weld shall be performed on the weld crown on a single scan path to examine the weld root by one-half V-path in two directions I
along the weld. Acticle III -
2430 requires that scanning l 1
- shall be done at twice (+6 dB) the primary reference l level. l .
a
! Basis for Raliat
, The thin wall piping welds at VEGP have extremely wide weld crowns on both circumferential and longitudinal !
j welds. Because of this, the scans parallel to the welds were omitted since the sound beam could not be made to hit the root area or the weld. The weld crowns could not be i ground flush because of minimum wall thicktiese violations i due to weld shrinkage at the root.
- An axial ultrasonic scan, using a 1/4-inch diameter 60 degree shear wave transducer was completed on the required welds. This transducer was used with a modified wedge to reduce the front wedge to index point distance.
Due to material properties, scanning at twice the primary I reference level is not always possible. The welds have l
. Deen scanned at the highest practical scanning level. I i
() Altarnate ixamination None 6-65 010 Rev. 4
i s
I A V '
VEGP-2, RR-34 Attachment ?
Identification Percentage No. Descriptton Exaelned Restrtct1on 21205-005-29 14" Pipe to Nozzle 50% 1004 Exam fr"A olpe s1 9 04 Exas from Nozzle side t 21205-006-1 8" Nozzle to Pipe 504 1004 Exas free pipe side 1
l 04 Exas from Nozzle side J1205-006-2 8" Pipe to Valve 50% 2004 Exas from pipe side 04 Exam tros valve side 21205-006-15 8" Pipe to Tec 874 1004 Exam from pipe side 1
754 Exas from tee side
! 21205-006-29 14" Pipe te Nozzle 504 1004 Exas,from pipe side t
04 Exas from Nozzle side 21205-007-1 14" Nozzle to Pipe 504 loot Exam from pipe side J
i 04 Exas from Nozzle side
, 21205-006-1 8" Nozzle to Pipe 50s 2004 Exam from pipe side
[
1 04 Exas from sozzle side I 21?o5-000-23 8" Pipe to Tee 944 1004 Exas from pipe side i
88% Exam free Tee side 21205-009-1 8" Valve so F.g.* 50s 2004 Exas free pipe side 04 Exam free Valve side 21205-039-8 12" Pipe to Tee 864 1004 Exam free pipe side t
724 Exam frce Tee sloe f
i 6-72 010 Nev.4
. - . . ~ . - - . - . . - - - . - . _ . . - _ - _ - _ _ - . -
l p -
t bS V '
~
VECP-2, Mk-36 Attachment I Identification Percentage No. Descript1on Examined Restrictton 1
! 21206-0C1-29 12" Pipe to Elbow 964 1004 Exas from pipe side 924 Emme from Elbow side 3 Restricted Access due to Branch Connection
, 21 ff)f.-001 -37 10" Reducer to Flange 50% 2004 Exas from reducer side
) 04 Exam from Flange side 41206-004-4 10" Valve to Reducer 504 1004 Exas from reducer side 04 Exam from Valve side 21206-004-1* 12" Flange to Redtxer 50s 1004 Exas tros rede.cer side 04 Exas from Reducer side 1
21206-004-12 10" Reducer to Flange 504 1004 Exair free reducer side 04 Exam free Flange side 21206-005-1 8" Flange to Pipe 504 1004 Exas from pipe side 04 Exas from Flange side 21206-006-1 8" FJange to Pipe 504 1004 Emme from pipe sida 04 Exas from Flange side 21208-137-12 8" Pipe to Valve 504 If04 Exas from pipe side 04 Exas from Valve side 21208-411-2 8" Pipe to Valve 50% *004 Exas from pipa side et Exas free Valve side i
21208-41s-48 8 Pip = to Tee 834 1004 Exas from pipe side 654 Exam free Tee side i
6-73 010 Rev.4
_ _ _ _ _ _ _ . . - _ _ _ _ _ _ _ _ _ _ - . _ _ , . _ , _ . , , _ . _ . _ _ . ~ . - , - _ _ _ . _ _ _ .__ - . . _ . _ . . _ _ . - . , _ . . _ __-. _ . _ - _ _ _
~
O O O
~
~ .
WEGP-2, RR-37 Attaciteent 1 Identification Percentage No. Descr!Ptton Examined Restriction 21208-123-63 4" Pipe to Flange 504 2004 Exas from pipe side 04 Exas free flange side 21208-123-86 4" Flan 2e to Pipe 504 1004 Exam from pipe side 04 Exas free flatige side 21208-123-87 4" Pipe to Flange 504 100s Exas from pipe side 04 Exas from flange side 21208-145-18 4" Tee to Pipe 424 854 Exam from pipe side I i 004 Exas from tee olde l 21208-145-19 4" Pipe to Valve 424 854 Exass free pire side Os Exam free <alve side ll
-l 21208-146-1 3" Tee to Pipe 50% 2004 Exam from pine side 504 Exas from tce side -t 21208-146-4 3" Pipe to Valve 504 2004 Exas from pipe side 04 Exam from valve side 21208-147-1 3' Tee to Pipe 50t 2004 Exas from pipe side 04 Exas free Tee side 21208-410-52 3* Pipe to Sockolet 504 1004 Exas from pipe side 04 Exam from soc-o-let side 8-78 010 Rev.4
9 VEGP-2 RR-42 component or Relief Area volumetric examination of nozzle inner radius section for Steam Generator inlet and outlet nozzles.
4 Examination Identification Numberst 21201-86-001-IR-01 21201-56-001-IR-02 21201-B6-002-IR-01 21301-B6-002-IR-02 1 21201-56-003-IR-01 1
21201-56-003-IR-02 21201-56-004-IR-01
) 21201-B6-004-IR-02 genuirement from which Relief is Recuested Item No. 83.140 Category B-D, Table IWB-2500-1 of ASME
] Section XI requiree volumetric examination of the nozzle inside-radius section for steam generator nozzles. Figure j IWB-2500-7 shows the applicable examination volume.
J Relief is requested from accomplishing this examination
]- for the inlet and outlet nozzles on all steam generators.
1 Basis for Relief The steam generator primary side nozzles are integrally l cast as a part of the channel head. The steam generator l
! nozzle inner radius section etnnot be volumetrically I examitied from the outside of the nozzle or channel head l because the rough,as-cast contact surface is not suitable l j for ultrasonic coupling, and the geometrical configuration l requires an excessively long test metal distance resulting l
< in high ultrasonic attenuation. The inside of the nozzle !
and channel head areas are covered with cladding in the l "as-welded" conditions therefore, meanin2ful volumetric l examination cannot be performed from the "as-welded" l surface. Even with proper preparation of the inside surface l j for volumetric examination, an adequate examination of the l
, area of interest (base metal just below the cladding) I could not be achieved due to the resulting ultrtMenic l j response at the clad-to-base metal interface. l Alternate Examination 1
l
. The inside surface of each steam generator primary side l d
nozzle inner radius rection has been visually exawined to l I the extent practical. The examination area includes the l I
inner radius surface region shown in ASME Section XI. l l Figurt IWB-2500-7 to the extent practical. I i
1 6-5, 01C Rev. 4
- - . _ = _ , - _ _ . -_ _ - __ - -_ ._
. ,~
9 Y.E93 2.
8B 19.
i Conconent or Relief Area Surface examinations of Pressurizer integrally welded attachments (Class 1)
Pressurizer Support skirt Weld I.D. No. 21201-VG-092-WO35 1
Reauirement from which Relief is Requested Iten No. 88.10, Category B-H, Table 2500-1 of ASHE Section II requires a surface examir.ation on areas A-B and C-D as '
shown on Fig. IWB -2593-13 for the Pressurizer integrally l l welded attachments. l
) Basis for Re(LLL
- The Pressurizer heater penetrations restricted personnel l access to Area C-D shown of Fig. IWB-2599 *3 on the Pressurizer skirt weid. '
1 Construction Code requirements ensure the structural t adequacy of the Pressurizer support skirt. The Section III examination results will 5e identified and documented in the l q VEGP-2 Final Report.
i j Arca A-B shown of Fig. IWB-2500-13 has received a surface I
- examination as required by the Code. [
1 Alternative Examination !
None h
s I !
l )
) l t
' i a
f
. . t 1 !
! 6-99 010 Rev. 4 1
, _ , . . , _ _ _ _ _ _ _ , _ _ _