ML20067B946
| ML20067B946 | |
| Person / Time | |
|---|---|
| Site: | Wolf Creek  |
| Issue date: | 02/16/1994 |
| From: | Carns N WOLF CREEK NUCLEAR OPERATING CORP. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| WM-94-0027, WM-94-27, NUDOCS 9402250210 | |
| Download: ML20067B946 (30) | |
Text
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W8LF CREEK
' NUCLEAR OPERATING CORPORATION 1-nea s euu carns February 16, 1994 Presdent and CNet Executive ott ct r WM 94-0027 U.
S.
Nuclear Regulatory Commission ATTN: Document Control Desk Mail Station P1-137 Washington, D.
C.
20555
Subject:
Docket No. 50-482:
Inservice Inspection Program Relief Requests Gentlemen:
The purpose of this letter is to transmit requests for relief from ASME Section XI requirements for the Wolf Creek Generating Station Inservice Inspection (ISI)
Program in accordance with 10 CFR 50.55a (g) (5) (iii).
Provided in the attachment to this letter are the. relief requests which apply to ISI Period 3.
Relief Requests IIR-32 through I1R-37 concern incomplete examinations as a result. of weld configurations, Relief Request IIR-38 concerns the visual examination of a single casting, and Relief Request I1R-39 concerns a permanently fixed box hanger that completely obstructs a weld from being examined.
If you have any questions concerning this matter, please contact me at (316) 364-8831, extension 4000, or Mr. Kevin J.
Moles at extension 4565.
Very truly yours, T,
o#
Neil S.
Carns President and Chief Executive Officer NSC/jra Attachment cc:
L.
J.
Callan (NRC), w/a G.
A.
Pick (NkC), w/a W.
D. Reckley (NRC), w/a L.
A.
Yandell (NRC), w/a 0
l s
9402250210 940236 l
1 DR ADOCK 05000482 PDR e u com 411/ Burhngtort KS 66839 / Phone. (316) 3C4 6831 An LQual opnortonrty Ernproyer M. F /HC/ VET
Attachment to WM 94-0027 P, age 1 of 29 ISI RELIEF REQUEST I1R-32 Cormonenta
- 1) BB-04-F001, BB-04-F014, BB-04-F015, EP-02-F010, EP-02-F021, EP-02-S003-G EP-02-S008-D and EP-02-S008-F
- 2) BB-09-V178-1, BG-23-F003A and BG-23-F004
- 3) EJ-04-F047 CaLencry2 i
- 1) ASME Section XI 1980 Edition Winter 1981 Addenda, Table IWB-2500-1, Examination Category B-J, Item Number B9.11 I
- 2) Augmented examination for break exclusion piping (NUREG-0800),
Examinations performed to ASME Section XI, 1980 Edition, Winter 1981s j
Addenda, Table IWC-2500-1, Examination Category C-F, Item Number C5.11
- 3) ASME Section XI, 1980 Edition, Wint'er 1981 Addenda, Table IWC-2500-1, i
Examination Category C-F, Item Number C5.21 t
==
Description:==
- 1) Pressurizer Spray Line 4"
pipe to 4"
spray nozzle safe-end (BB-04-F001),
Pressurizer Spray Line valve PCV-455C to 4"
pipe (BB-04-F014),
Pressurizer Spray Line 4"
pipe to valve PCV-455C (BB-04-F015), Accumulator Safety Injection Line valve 8818B - to 6"
-l' pipe (EP-02-F010), Accumu}ator Safety Injection Line valve 8818C'to-6" pipe (EP-02-F021), Acet.qulator Safety Injection Line 10" X 10" X 6"
tee to 6" pipe (EP-02-5003-G), Accumulator Safety Injection Line 10" X 10" X 6" tee to 10" pipe (EP-02-S008-D) and Accumulator Safety Injection Line 10" pipe to 10" X 10" X 6" tee (EP-02-S008-F)
- 2) Reactor Coolant Pump "C"
Seal Water Injection Line valve V178 to 2" pup piece (BB-09-V178-1), Chemical and Volume Control System Charging Line valve 8381 to 3"
pipe (BG F003 A) and Chemical and Volume Control System Charging Line 3" pipe to valve 8381 (BG-23-F004)
- 3) Residual Heat Removal Line valve HV-87 CIA to 12" pipe (EJ-04-F047)
Code Remiirement:
Volumetric Requirements:
a
- 1) Requires the inner 1/3t of. the weld plus 1/4" of the base metal beyond the weld toe to be scanned in two directions as specified by Appendix III, paragraph III-4400 and Figure IWB-2500-8.
a ee
+
4 Attachment to WM 94-0027 F,nge 2'of 29 ISI RELIEF REQUEST I1R-32 (continued)
- 2) Requires the inner 1/3t of the weld plus 1/4" of the base metal beyond.
l the weld toe to be scanned in two directions as specified by Appendix III, paragraph III-4400 and Figure IWC-2500-7.
j a
- 3) Requires the inner 1/3t of the weld plus 1/4" of the base metal beyond the weld toe to be scanned in two directions as specified by Appendix -
.i III, paragraph III-4400 and Figure IWC-2500-7.
l Surface Requirements:
- 1) 100% surface examination as defined by Article 6 of ASME Section V and j
Figure IWB-2500-8.
l si
- 2) 100% surface examination as defined by Article 6 of ASME Section V and
,j Figure IWC-2500-7.
l i
- 3) 100% surface examination as defined by Article 6 of ASME Section V and l
Figure IWC-2500-7.
Bacis For Relief:
Complete ultrasonic examination of the subject welds was not feasible because of limitations in geometry and metallurgic properties. The weld' configurations (valve' bodies, pipe tees, etc.)
do. not provide an adequate examination surface to allow a complete examination from two directions.
Alternative examination.through the use of a full vee path technique from one side has been determined to not provide confidence
{
that the weld coverage is being satisfactorily examined.
This results i
from the dendritic properties of austenitic steel material which causes j
sound redirection and attenuation.
l i
i I
i i
s Attachment to WM 94-0027 Page.3'of.29 l
i ISI RELIEF REQUEST I1R-32 (continued)
Weld ID Req. Method Extent Examined i
BB-04-F001 UT 58% in one beam direction.
(pipe to safe-end) 9% in two beam directions-33% of WRV not examined 100% Cire. Scan Reference Figure 1 PT 100%
BB-04-F014 UT 100%, pipe side only (pipe to valve) 100% Circ. Scan Reference Figure 2 PT 100%
l
- t BB-04-F015 UT 100%, pipe side only (pipe to valve) 100% Cire. Scan Reference Figure 2 PT 100%
EP-02-F030 UT 67% in one beam direction i
(valve to pipe) 33% in two beam direction' 100% Circ. Scan Reference Figure 3 PT 100%
?
EP-02-F021 UT 72% in one beam direction (valve to pipe) 100% Cire. Scan Reference Figure 4 PT 100%
EP 02-S003-G UT 100%, pipe side only (tee to pipe) 100% Cire Scan Reference Figure 5 PT 100%
EP-02-S008-D UT 100%, pipe side only (tee to pipe) 100% Circ. Scan Reference Figure 5' l
PT 100%
EP-02-S00B-F UT 100%, pipe side only (pipe to tee) 100% Cire. Scan Reference Figure 5 l
PT 100%
BB-09-V178-1 UT 93.5%, pipe side only (valve to pipe) 100% Cire. Scan Reference Figure 6 PT 100%
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Attachment to WM 94-0027 i
'P, age 4'of 29 l
ISI RELIEF REQUEST IIR-32 (continued) i Weld ID Req. Method Extent Examined l
BG-23-F003A UT 82% examined in one direction I
(valve to pipe) 9% examined in two directions 9% not examined 50% Circ. Scan Reference Figure 7 PT Not Required per Program Plan l
BG-23-F004 UT 82% examined'in one direction (pipe to valve) 9% examined in two directions 9% not examined i
50% Cire. Scan Reference Figure 7 PT Not Required per Program Plan EJ-04-F047 UT 62.5% examined in one. direct.
(valve to pipe) 37.5% examined in two direct.
j 100% Circ. Scan
.l Reference Figure B PT 100%
r Alternate Examination:
i None; because of geometry and attenuation variables, the required.
i volumetric and surface examinations were completed to the maximum extent practical.
ASME Code Section III:
')
?
Components were accepted in accordance with the requirements.of Section
- III, which included volumetric and surface examinations as well ' as pressure tests.
l Evaluation of Plant safety:
Strict ASME Section III quality controls were used when designing,
[
fabricating and installing these welds.
In addition, these welds.were 3
surface and volumetrically examined (Preservice Examination (PSI) as well as the current ISI) with no irregularities found.
The probability.
of a flaw occurring and not being detected by the examination already performed is small.
Future indications of significant size will be found by examination of the weld as it is now.
Based on the above, reasonable assurance of the' continued inservice structural integrity of the subject welds is achieved without providing a complete examination.
~.
Attachment to WM 94-0027 Page 5'of 29 r
4
' Component:
BB-04-F001 i
?
i Transducer Exit Point l
Nozzle SafeEnd N/
Nr 7,
N/
T)*l Pipe
\\-
A J
(\\;
~
a WRV Inspected in Direction Towards Pipe 58 %
WRV Inspected in Direction Towards SafeEnd 4/
?'yTb,
W WRV Inspected in Two Directions
--- 9 %
WRV not Examined - 33%
1 I
Figure 1 l
t I
Attachment to WM 94-0027
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Page 6 of 29 Components BB-04-F014 BB-04-F015 I
Transducer Exit Point 4
i Valve Side Pipe Side
, 7 s
- h ' <,
5 WRV Inspected in Direction Towards Valve i
l i
Figure 2 i
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I
Attachment to WM 94-0027 Page 7 of 29 Component:
EP-02-F010 Transducer Exit Point Valve Sid h
Tm Pipe Side
, T=
l i
ef k ' Q Ay WRV Inspected in Direction Towards Valve 67 %
WRV Inspected in Direction Towards Pipe WRV Inspected in Two Directions
---33 %
Figure 3
Attachment to WM 94-0027 I
Page B of 29 Component:
-i Transducer Exit Point V
Valve Side n
V V
T=
Pipe Side
/
?
x WRV Examined in Direction Towards Pipe 72 %
WRV Examined in Direction Towards Valve
~'
WRV Examined in Two Directions WRV not Examined 28 %
Figure 4 i
Attachment to h'4 94-0027 Page,9 of 29
' Component:
EP-02-S003-G
.l EP-02-S008-D EP-02-S008-F 1
i r
Transducer Exit Point Tee Side Pipe Side
,[
i
\\l l
l,.3../ 4 i
WRV Inspected in Direction Towards Tee i
Figure 5 4
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. Attachment to hH 94-0027 l
Page 10 of 29-Component:
BB-09-V178-1 J
l Transducer Exit Point
.i s
e Valve Side Pipe Side
)
i\\'
l 6; f.x
-j WRV Inspected in Direction Towards Valve
...- 93.5 %
WRV not Examined --6.5%
Figure 6
Attachment to hh 94-0027 Page 11 of 29 Component:
BG-23-F003A BG-23-F004 Transducer Exit Point V
Valve Side Tp V
V T=
Pipe Side
/
y
_/
/
h
/
WRV Examined in Direction Towards Pipe 82 %
WRV Examined in Direction Towards Valve
=
WRV Examined in Two Directions --- 9%
WRV not Examined
---9%
Figure 7
Attachment to hw 94-0027 Page 12 of 29 Component:
EJ-04-F047 B
Transducer Exit Point Valve Sid h
Toe Pipe Side
, T**
l
's f$bYYik WRV Inspected in Direction Towards Valve 62.5 %
WRV Inspected in Direction Towards Pipe r
i WRV Inspected in Two Directions
--.37.5 %
i i
Figure 8 o
I i
Attachment to WM 94-0027 page 13 of 29 ISI RELIEF REQUEST IIR-33 Component:
BG-23-F005 Category:
l Augmented examination for break exclusion piping (NUREG-0800),
-l Examination performed to ASME Section XI, 1980 Edition, Winter 1981
-)
Addenda, Table IWC-2500-1, Examination Category C-F, Item Number C5.11 Descrintion:
Chemical Volume Control System Charging Line 3" pipe to 3" pipe t' ode Remai rement :
Requires the inner 1/3t of the weld plus 1/4" of the base metal beyond-the weld toe to be scanned in two directions as specified by Appendix III, paragraph III-4400 and Figure IWC-2500-7.
4 Basin for Relief:
I Complete ultrasonic examination of the weld was not feasible because of limitations in geometry and metallurgic properties.
Geometric-i limitations resulted from weld shrinkage at the toe of the weld which causes loss of search unit contact ' due to lift off.
. Alternative examination through the use of a full vee. path technique from one side has been determined to not provide confidence that the weld coverage is being satisfactorily examined.
This results' from the dendritic properties of austenitic steel material which causes sound redirection and attenuation.
37% of the weld required volume'was not examined with two beam directions (reference Figure 9).
I Alternate Ey, amination:
None; because-of geometry and attenuation variables, the required volumetric examination was completed to the maximum extent practical, a
ASME Code Section III:
j n
Components were accepted in accordance with the requirements of Section
- III, which included volumetric and surface examinations as well as pressure tests.
. ~. -...
. Attachment to WM 94-0027 Page 14 of=29 ISI RELIEF REQUEST I1R-33 (continued) l Evaluation of Plant Safety:
Strict ASME Section III quality controls were used when designing, fabricating and installing the weld.
In addition,.the weld was volumetrically examined (PSI as well as - the current.ISI) with no irregularities found. The probability of a flaw occurring and not being detected by the examination already performed is small.
Future indications of significant size will be found by examination of the weld as it is now.
i Based on the above, reasonable assurance of the continued inservice structural integrity of the subject weld is achieved without providing a complete examination.
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Attachment to WM 94-0027 Page 15 of 29 Component:
BG-23-F005 Weld Root 1
45 Degree j
45 Degree 60 Degree 60 Degrec y,
f N
.m re WRV not Examined -- 37%
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1 Figure 9 l
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Attachment to WM 94-0027 Page.16 of 29 l'
ISI RELIEF REQUEST IlR-34 Componenta EBB 01D-S EM4-1-W l
CALegorY1 ASME Section XI, 1980 Edition, Winter 1981 Addenda, Table IWB-2500-1, Examination Category B-B, Item Number B2.40 Descriptiont Steam Generator "D" bottom head to tubecheet weld Cgde Recuirements:
Requires the weld plus 1/2t of the base metal beyond the weld toe to be examined.
The weld metal is to be examined with 0 degree and two beam angles in two directions.
The adjacent base metal included in the examination volume need be examined with 0 degree and two beam angles from one direction.
Reference Article 4,
paragraph T-441.4 of ASME 3
Section V and Figure IWB-2500-6 of ASME Section XI for volumetric requirements.
s Danis for Reliefi The subject weld could not be fully Ultrasonically examined due to
-1 interferences from the steam generator support legs (4), support flange and the code data plate.
The. steam generator support. leg interference
~
resulted in.22.4% of the Weld Required Volume (WRV).not being examined.
The 60 degree axial scan on the tubesheet side is 34%. obstructed by the.
support flange.
The obstruction results from insufficient ~ base metal between the weld and flange to complete this angle beam examination.
There is approximately 1% obstruction due to the code. data plate.
Reference Figure 10 for weld layout.
Al.t.gyngte Examination:
None; the required volumetric examination was completed to the maximum extent possible.
j ASME CQde Section III:
Components were accepted in accordance with the' requirements of Section
- III, which included volumetric and surface examinations as well as pressure tests.
i
-. -. ~..
Attachment to WM 94-0027 Page 17 of 29 l
ISI RELIEF REQUEST IIR-34 (continued)
Evaluation of Plant Safety:
Strict ASME Section III quality controls were used when designing, fabricating and installing this weld.
In addition, this weld was volumetrically examined (PSI as well as the current ISI) with no-irregularities found. The probability of a flaw occurring and not being detected by the examination already performed is small.
Future
)
indications of significant size will be found by examination of the weld i
as it is now.
Based on the above, reasonable assurance of the continued inservice structural integrity of the subject weld is achieved without providing a complete examination, i
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- Attachment.to WM 94-0027 Page.18 of 29 Component EBB 01D-SEAM-1-W Not To Scale
/\\
6"
\\/
i Support Flange q~
Weld #: TBB03 10A-W Weld Width = 4.5" s
(
Code Data Plate N
Support Leg (4 typical)
SuDoort Lea Locations i
21" to 45" CCW from Datum N 61 1/4" to 81 1/4" CW from Datum N 38" to 64" CW from Datum No 43" to 67" CCW form Datum No Figure 10 4
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Attachment to WM 94-0027 Page 19 of 29 i
ISI RELIEF REQUEST I1R-35 Component:
TBB03-10A-W category:
ASME Section XI, 1980 Edition, Winter 1981 Addenda, Table IWB-2500-1, Examination Category B-D, Item Number B3.110 Description 1 Pressurizer surge nozzle to bottom head weld code Recuirement:
l Requires the weld plus 1/2t of the base metal beyond the weld toe to be
[
examined.
The weld metal is to be examined with 0 degree and two beam angles in two directions.
The adj acent base metal included in the examination volume need be examined with 0 degree and two beam angles from one direction.
Reference Article 4,
paragraph T-441.4 of ASME Section V and Figure IWB-25 00 - 7 (b) of ASME Section XI for volumetric requirements, Basis for Relief:
The subject weld could not be fully Ultrasonically examined due to the y
surge nozzle to shell configuration and the pressurizer heaters.
This configuration resulted in 35% of the weld required volume not 'being examined with the O degree or with the parallel angle beam scan I
I (reference Figure 11).
In addition, the weld metal was only examined in one direction and the adjacent base metal was not fully examined in one direction with two beam angles (92% complete with 60 degree angle beam and 88.4% complete with 45 degree. angle beam, reference Figure 12).
i Alternate Examination; I
I None; the required volumetric examination was completed to the maximum extent possible.
ASME Code Section III:
Components were accepted in accordance with the requirements of Section
- III, which included volumetric and surface examinations as well as pressure tests.
.1
i Attachment to WM 94-0027 Page 20 of 29 ISI RELIEF REQUEST IlR-35 (continued!
Eyaluation of plant safety;
-i Strict ASME Section III quality controls were used when designing, fabricating and installing this weld.
In addition, this weld was j
volumetrically examined (PSI an well as the current.ISI) with no irregularities found. The probability of a flaw occurring and not being
)
detected by the examination already performed is small.
Future indications of significant size will be found by examination of the weld as it is now.
Based on the above, reasonable assurance of the continued inservice structural integrity of the subject weld is achieved 4 thout providing a complete examination.
1 1
i
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Attachment to WM 94-0027
)
Page 21 of 29 C'omponent :
TBB03-10A-W
')
i Pressunzer Surge Nozzle l
l
/
N/
N, s
- 1/2t' Weld
' 1/2t' Pressun.zer l
~
Bottom Head l
l l
l l
~
Volume not Examined With 0 Degree 35 %
or With Parallel Angle Beam t
i Figure 11 l
l J
4
+
Attachment to WM 94-0027 Page 22 of 29
' Component:
TBB03-10A-W i
I t
W N
Pressurizer Surge Nozzle I
L 60 Degree 45 Degree
{
J ums i
Pressun.zer l
w Bottom Head l
l l
l l
I I
I t
,1/2t Weld
,1/2(
s, s
,s es 1
Volume not Examined by 45 Degree Angle Beam ---- 3.6 %
7 sy Volume not Examined by 45 or 60 Degree Angle Beam ----- 8 %
i t
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Figure 12 I
1
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Attachment to WM 94-0027 Page 23 of 29 i
1 ISI RELIEF REQUEST IIR-36 l
t Component:
TBB03-10A-IR Categorv2 ASME Section XI, 1980 Edition, Winter 1981 Addenda, Table IWB-2500-1, Examination Category B-D, Item Number B3.120 Descrintion:
Pressurizer surge nozzle inner radius 6
Code Reauirement:
Requires that the inside corner region of the nozzle chall'be completely ultrasonic examined to a depth of 1/2t, measured from the inside surface of the nozzle.
Reference Figure IWB-2500-7(b) of ASME Section XI for I
volumetric requirements.
Basis for Relief:
The subject nozzle inner radius could not be fully Ultrasonically examined due to interferences from the pressurizer heaters penetrations 7
and the nozzle configuration.
This resulted in 70% of the required examination volume not being inspected (reference Figure 13).
Alternate Examination:
None; the required volumetric examination was completed to the maximum extent possible.
l ASME Cod d ction III:
I Components were accepted in accordance with the requirements of Section 1
III, which included volumetric and surface examinations as well as pressure tests.
i Evaluaticn of Plant Safety:
l-Strict ASME Section III quality controls were used when designing,
-j fabricating and installing this weld.
In addition, this weld was
- l I
volumetrically examined (PSI as well 'as the current ISI) with no irregularitiec found. The probability of a flaw occurring and not being i
detected by the examination already performed is small.
Future i
indications of significant size will be found by examination of the weld as it is now.
Based on the above, ' reasonable assurance of the continued inservice structural integrity of.the subject weld is achieved without providing a-complete examination.
I 1
. Attachment to hH 94-0027 Page 24 of 29
[
Component:
TBB03-10A-IR i
Pressurizer Surge Nozzle 1
M 1/2t I
j A
B Pressurizer Bottom Head g@*u D
i C
Volume not Examined,360 Degrees
41 %
4 d
Volume Examined,360 Degrees 21 %
-i Volume Examined, 86 Degrees Only 38 %
(resulting from 18" gap in heater penetrations) t 70% of Total Exam Volume is not Examined NOTE: Exam Volume is the area of ABCD Figure 13
..-+4
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+
Attachment to WM 94-0027 Page 25 of 29 i
i ISI RELIEF REQUEST 11R-37 Component:
CH-103-101 Cat 23DIY.i ASME Section XI, 1980 Edition, Winter 1981 Addenda, Table IWB-2500-1, Examination Category B-A, Item Number Bl.21
==
Description:==
Reactor Pressure Vessel closure head upper circumferential weld rode _ Requirement:
Requires the weld plus 1/2t of the base metal beyond the weld toe to be examined.
The weld metal is to be examined with 0 degree and two beam angles in two directions.
The adjacent base metal included in the examination volume need be examined with 0 degree and two beam angles from one direction.
Reference Article 4,
paragraph T-441.4 of ASME l
i Section V and Figure IWB-2500-3 of ASME Section XI for volumetric requirements.
Basis for Relief:
The subject weld could not be fully Ultrasonically examined due to the i
cooling duct ring limiting the required scan path and the three lifting lugs obstructing the required inspection volume.
The weld metal was l
100% inspected in one direction by the 45 degree and 60 degree angle
-l beam, but was limited in the other direction due to the cooling ring.
i This resulted in 16.8% of weld metal not being inspected by the' 45 degree angle beam and 47.3% not being. inspected with the 60 degree angle beam.
The three lifting lugs resulted in 5.2%
of. the required inspection volume not to be examined.
I i
Alternate Examinatign.1 None; the required volumetric examination was completed to the maximum extent possible.
ASME Code Section III:
f I
Components were accepted in accordance with'the requirements of Section f
- III, which included volumetric and surface examinations as well as
~
pressure tests.
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Attachment to WM 94-0027 Page 25 of 29 3
ISI RELIEF REQUEST IIR-37 (continued) j Evaluation of Plant safety:
Strict ASME Section III quality controls were used when designing, fabricating and installing this weld.
In addition, this weld was volumetrically examined (PSI as well as the current ISI) with no irregularities found.
The probability of a flaw occurring and not being detected by the examination already performed is small.
Future indications of significant size will be found by examination of the weld as it is now 1
Based on the above, reasonable assurance of the continued inservice structural integrity of the subject weld is achieved without providing a complete examination.
l 1!
i 5
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Attachment to WM.94-0027 Page 27 of 29 s
t ISI RELIEF REQUEST IlR-38 Component:
PBB01B-SURF Category:
ASME Section XI, 1980 Edition, Winter 1981 Addenda, Table IWB-2500-1, Examination Category B-L-2, Item Number B12.20
==
Description:==
Reactor Coolant Pump "B"
internal pressure surface code Recruirement :
Requires that a visual (VT-3) examination be performed on the pump internal pressure surface.
This examination is to be performed each inspection interval.
Banis for Relief:
ASME Section XI, 1989 Edition, specifies that the visual examination (VT-3) of the pumps internal pressure surface need only be examined if the pump is disassembled for maintenance, repair or volumetric examination.
Since the pumps are a single casting, volumetric examination is not applicable.
/dte rna t e Examination:
{
The visual examination (VT-3) of the pumps internal pressure surface I
will be done when the pump is disassembled for maintenance or repair.
The visual examination will only be done once per interval if I
disassembled more often.
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j Attachment to WM 94-0027 Page 2b of 29 h
component i
BB-08-FW304 Category:
Augmented examination for break exclusion piping (NUREG-0800),
Examinations performed to ASME Section XI, 1980 Edition, Winter 1981 Addenda, Table IWC-2500-1, Examination Category C-F, Item Number C5.11 pescription:
i Reactor Coolant System Reactor Coolant Pump "A"
Seal Water Injection 2" pipe to 2" pipe Code Requirement:
Volumetric Requirements:
1 Requires the inner 1/3t of the weld plus 1/4" of the base metal beyond the weld toe to be scanned in two directions as specified by Appendix
{
III, paragraph III-4400 and Figure IWC-2500-7.
)
Surface Requirements 100% surface examination as defined by Article 6 of ASME Section V and l
Figure IWC-2500-7.
i Danic for Relief:
~
The surface and volumetric examination of the subject weld was noL able to be performed due to a permanent box hanger located directly over.the subject weld.
The box hanger has four integral attachments welded to it which are in direct contact with the pipe. The integral attachments are located directly on the subject weld, making it impossible to get access to the weld for inspection purposes.
Alternate Examination:
None.
There is not a replacement weld to inspect.
All the welds that are within the scope of NUREG-0800 for this system have been selected.
AZE Code Section III1 Components were accepted in'accordance with the requirements of Section
- III, which included volumetric and curface examinations.as well as pressure tests.
- l 1
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' Attachment to WM 94-0027 Page 29,of 29 e
ISI RELIEF REQUEST IlR-39 (continued)
Eyaluation of Plant Safety:
Strict ASME Section III quality controls were used when designing, f
fabricating and installing this weld.
The PSI (surface and volumetric) j of the subject weld identified no irregularities.
In addition, all the remaining welds within the scope of NUREG-0800 for this system will or have been inspected.
f Based on the above, reasonable assurance of the continued inservice t
structural integrity of the system is achieved without examining the above mentioned weld.
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