ML20035A843
| ML20035A843 | |
| Person / Time | |
|---|---|
| Site: | Browns Ferry  |
| Issue date: | 03/25/1993 |
| From: | Zeringue O TENNESSEE VALLEY AUTHORITY |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| NUDOCS 9303300035 | |
| Download: ML20035A843 (21) | |
Text
g 1
A AbN Mey AumWy Fw 0% Scy Mn Deau A%na 3WN M;0 MAR 2 51993 O J "Ike* Zenngue Voe f%radent. Bfcr.vns Terry Nuciear Pfar:t U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D.C.
20555 Gentlemen:
In the Matter Of
)
Docket Nos. 50-259 Tennessee Valley Authority
)
50-260 50-296 BROWNS FERRY NUCLEAR PLANT (BFN) - UNIT 2 REVISED REACTOR PRESSURE VESSEL (RPV) EXAMINATION SCHEDULE AND EXAMINATION COVERACE OF THE UNITS 1, 2, AND 3 REACTOR VESSEL WELDS
Reference:
1.
Letter from TVA to NRC dated September 27, 1991, "BFN
-10 CFR 50.55 Proposed Rules for Units 1, 2, and 3 Reac';or Pressure Vessel (RPV) Examinations" 2.
Let.er from NRC to TVA dated August 5, 1992,." Summary of che July 15, 1992, Meeting with the Tennessee Valley Authority Regarding the Reactor Vessel Inspections at the Browns Ferry Nuclear Plant, Units 1, 2, and 3" 3.
Letter from TVA i> NRC dated March 1, 1988, "BFN -
Extension of Ten-Year Inservice Inspection Interval" The purpose of this letter is to inform the staff of the RPV examination schedule for BFN Unit 2.
This schedule revises the commitment provided in Reference 1.
In addition this letter provides information on the calculated examination coverage for the BFN Units 1, 2, and 3 reactor
~
vessel welds which is required per American Society of Mechanical.
Engineers Boiler And-Pressure Vessel Code (ASME) Section X1 and 10-l CFR 50.55a(g)(6)(ii)(A) as stated in Reference 2.
! is a summary description of the inspection' requirements as defined in ASME Section XI and 10 CFR 50.55a(g)(6)(ii)(A). Enclosure 2 contains tables and sketches which describe the calculated examination coverage for each unit's vessel welds.. These coverages are based on accessibility surveys conducted on each unit along with a review of the 5
vessel's fabrication drawings. This information was then combined with i
the expected capability of General Electric's Internal Diameter (ID)
[
inspection equipment and expected accessible areas from the vessel Outside i
Diameter (OD).
In addition, a summary for each unit'is provided that lists the welds with less than 90 percent ASME coverage along with a description of the cause for limitation.
Each of the E m units has a t
biological shield wall and installed vessel insulation which restrict access to the vessel OD.
The physical arrangement is shown on.
t 290097 fotr7 pDRosaoooas,aosas ADOCK 05ooo259
- p PDR ll g.
l i..
4 2
U.S. Nuclear Regulatory Commission MAR 2 51993 Both Units 1 and 3 are in the last period of their first inspection interval. The code of record is the 1974 Edition with Addenda through Summer 1975 of ASME Section XI.
Nondestructive Examination (NDE) techniques and evaluation criteria were upgraded to the 1986 edition of ASME Section XI on June 11, 1992. Units 1 and 3 will be upgraded to the second inspection interval one year after startup as stated in Reference 3.
The code of record will be the Edition and Addenda of ASME Section XI in effect on its respective startup date.
TVA's plans for performing RPV weld examinations are in accordance with the requirements of 10 CFR 50.55a(g)(6)(ii)(A).
The schedule for Units 1 and 3 is as stated in Reference 1.
BFN Unit 2 RPV welds examination will be performed during the second inspection interval.
The Unit 2 second inspection interval began on May 24, 1992.
The code of record is the 1986 Edition of ASME Section XI.
H is is the Code Edition that was in effect at the startup of BFN Unit 2 on May 24,1991. contains a summary of the commitment made in this submittal.
If you have any questions, please contact G. D. Pierce, Interim Site Licensing Manager, at 205-729-7566.
Sincerely, f;C?
Qllk{g'(/f/fL la, 0[J.Zeringu Enclosure cc (Enclosure):
NRC Resident Inspector Browns Ferry Nuclear Plant Route 12, Box 637 Athens, Alabama 35611 Mr. Thierry M. Ross, Project Manager U.S. Nuclear Regulatory Commission One White Flint, North 11555.".ockville Pike Rockville, Maryland 20852 Mr. B. A. Wilson, Project Chief U.S. Nuclear Regulatory Commission Region II 101 Marietta Street, NW, Suite 2900 Atlanta, Georgia 30323 I
i
m 5
I r
ENCLOSURE 1 BROWNS FERRY UNITS 1,2 AND 3 f
RPV EXAMINATION PLAN
SUMMARY
r-m Browns Ferrv. Units 1.2 & 3 - RPV Examination Plan Summarv ASME Section XI, and 10 CFR 50.55a requires that ultrasonic examination of all reactor pressure vessel welds be performed during each inservice inspection interval. The requirements state that each weld shall be examined along its entire length and the effective volume which must be examined is as illustrated in Figure 1 below. An NRC tecepted ASME,Section XI Code Case N-460 relaxes these requirements and basically states that a reduction of 10% is permissible.
The 1986 edition of the ASME Code,Section XI, IWA-2232 states that the RPV weld required volume shall be examined per ASME,Section V, Article 4 requirements. Article 4 specifies the examination angles and scan directions for examining RPV welds. It also specifies how the examinations are to be performed. If examinations are performed from the clad side of the component, the 1989 edition of the ASME Code, Section-V, provides guidance for a supplemental 70 examination of the clad-basemetalinterface.
The Section XI required examination volume for each type of RP'I weld is shown in the IWB-2600 figures. The volume incorporates the weld and 1/2 t (1/2 plate thickness) of case metal each side of the weld as shown in
// pure 1. The weld volume must be scanned with two angle beams from two directions, where adjacent base metal must be completely scanned by two angle beams, but need not be completely scanned by both angles from I
both directions. (Any combination of two angle beams will satisfy the requirements.)
k.
?
ri W
I t
f b
k
<- mi-X K-m t -X Figure 1 These seam welds must be examined by three or four beam angles, depending on which surface the exam is conducted from. For examinations conducted from the vessel ID surface, four different beams are utilized to interrogate the examination volume. Examination volume coverage from the inside surface is tabulated using 0* L-wave,45,60" shear-waves for volumetric interrogation and 70 refracted longitudinal-wave (RL) for underclad detection. The examination coverage from the outside surface is calculated using O' L-wave,45,60a shear-wave search units.
The examination coverage for the three (3) Browns Ferry units was calculated based on a thorough review of the dimensions and configurations as shown on the B & W f abrication drawings. The external mirror insulation layouts
{
were reviewed for access to the vessel exterior. Internal and external obstructions were identified and listed for i
each seam weld. The coverage calculation for each weld is based on an automated examination from the Vessel interior with General Electric's GERIS 2000 and the PIONEER manipulator. The coverage calculations from the exterior of the vessel are based on manual examination of the accessible areas. provides vessel rollout maps illustrating limitation areas with complementing tables describing ASME coverage for each weld from the inside and outside surface. As a supplement, an additional table is being provided listing, welds with less than 90% volume coverage describing cause for the limitation.
[
Page 1 of 1
{!;
~
-h ENCLOSURE 2-BROWNS FERRY UNITS 1
,2 AND 3 RPV WELDS EXAMINATION COVERAGE i
y RPV Examinntion Covaraaa for Browns Farry - Unit 1
.-OD Access TotalASME Number Type Coverage % / Coverage % Coverage % Comments C-BH-1 Circ 0
18 18 10 exam: No Access OD exam: Access tim!ted to area beneath the N1 & N8 nozzles.
1 C-1 -2 Circ 93 No Access 93 0 "*n: Lknned w suramance specknen hoi &rs @ 30,120 & 300 degrees.
OD exam: No Access.
C-2-3 Circ 63 No Access 63 0 exam: Limited by Guide Rods @ 0 & 100 degrees Core Spray C w,-re @ 172.5,187.5.352.5
& 7,5 degrees, and Surveillance Specimen Holders @ 30,120, & 300 degrees.
00 exam: No Access.
C-3-4 Circ 90 2
92 ID exam: Limited by Guide Rods @ 0 & 180 degrees, Nozzle N11 A @ 40 degrees and N11 B @ 220 -
degrees.
00 exam: Requires removal of"Q* panels adjacent to the N11 A & B Nozzles.
C-4-5 Circ 93 93 S "am: Lknned w Gui& Rods @ 0 & 180 &gres.
OD exam:
- No additional coverage can be obtained.
C-5-FLG Circ 93 93 0 nam: Lknned w GuHe Rods @ 0 & 180 degrees OD exam:
- No additional coverage can be obtained.
V-1-A Vert 76 19 95 0 nam: Lknned by Nozzk N2 A @ 30 degrees, and vertical travel mechanism limnation.
l OD e. tam: Removal of RIP E-2 & G-2 required for coverage.
V-1 -B Vert 82 82 S "am:
'k" dad W N zzk N2 E @ 150 &gres, and edicaHrawl mechans limRaUon.
OD exam:
- No additional coverage can be obtained.
V-1 -C Vert.
76 6
82 0 nam: LimRed by Nozzk N2 H @ 270 Degres, and wdicaHrawl mechanism TimRaHon.
+
@ 260*
OD nam: Addrwat coverage can be obtained adjacent to tne N2N Nozzie.
V-2-A Vert 91 No' Access 91 D nam: LknRed w Nmk N16 A @ @ &grws
@ 45 OD exam: No Access.
l e
f Page 1 of 4.
F
~
RPV Examination Covarnaa for Browns Farry - Unit 1 W:Id Weld ID ASME OD Access Total ASME Number Type Coverage % / Coverage % Coverage % Comments V-2-B Vert 100 Not Needed 100 O uam: No LWahons.
@ 165 00 exam: No Exam Needed.
V-2-C Vert 100 Not Needed 100 O nam: No LMatons.
@ 285*
oO ezam: no Exam needed.
V-3-A Vert 73 27 100 iDexam: umned by reedweter Sparger a Core spray piping.
@ 107*
oO exam: Removal of RIP P10 & Q11 required for coverage V-3-B Vert 68 26 94 0 exam: Umited by Feedwater Sparger, Core Spray piping, N11 B @ 220 Degrees.
@ 227' oD ezam: timmed due to proximny of nti s nozzie @ 220 Degrees Removai or Rip P21, o22 a 023 are required for 94% coverage.
V-3-C Vert 26 18 44 ID exam: Limited by Feedwater Sparger & Core Spray piping.
@ 347 oD exam: Removal of RIP P32 & Q34 is required for coverage.
V-4-A Vert 100 Not Needed 100 D exam: No umMat' ns.
e
@ 306*
oD exam: no exam needed.
V-4-B Vert 100 Not Needed 100 ID exam: No Limitations.
@ 68*
oO exam: no Exam needed.
V-4-C Vert 50 20 70 m exam: Gude Rod Q 180 Degrees b
oD exam: Requires removal of SDC-12-13 penet V-5-A Vert 86 14 100 0 "am: Steam Dryer Support eracM @ 94 Degrus.
@ 90*
oO exam: Removat of RIP T-5 will permM 100% coverage.
V-5-B Vert 100 Not Needed 100 ID exam: No Limitations.
@ 210" oO nam: no Exam needed.
V-5-C Vert 100 Not Needed 100 iD exam: umited by reedwater Sparger a Core spray piping.
@ 330*
oD exam: no exam needed
' Page 2 of 4
,..r a.=e---,
w-,.e,c,..n#.,,,e.,-.,,.
m_,
r Limithtion Summnry for Brawns Ferry, Unit 1 - RPV Smm Walds with < 90% ASME Coveraae W:Id Weld TotalASME Number Type Coverage % Cause for Limitations C-BH-1 Circ 18 0 narn : h Pioneer manipulator design will not allow bett extension to reach the examination area for this weld.
OD exam: Access limited to area beneath the N1 & NB nozzles Additional weld coverage is restricted due to non-removable *D' & *E" Insulation panels.
C-2-3 Circ 63 0 exam: Resricted by Guide Roda @ 0 & 180 degrees, Core Spney Dwiwri+rs @ 172.5,187.5,352.5 & 7.5 degrees, and Survel! lance Specimen Holders @ 30,120, & 300 degrees.
OD enam: Restricted by non-removable *M* Insulation panels, proximity of the Bio-shield.
V-1 -B Vert 82 ID exam: Restricted by proximity of Nozzle N2 E @ 150 degrees, and Pioneer vertical extension design.
@ 140' OD exam: Restricted by norwemovable Insulation Panel (E8 panel), and proximity of Nozzle N2 E.
V-1 -C Vert 82 ID exam: Restricted by proximity of Nozzle N2 H @ 270 Degrees, and Pioneer vertical extension design.
@ 260' OD exam: Restricted by non-removable Insulation Panel (E 18 penet), and proximity of Nozzle N2 H.
V-3-C Vert 44
_ exam: Restricted by Feedwater Sparger & Core Spray piping adjacent to the weld
@ 347 00 exam: Restricted by non-removable insulation panels M18, N18 & 018.
y.4.C Vgrt
- /0 ID exam: Restricted by Guide Rod q 180 Degrees. Partial coverage is obtained for the entire length of weld.
OD exam: Restricted by norwemovable R-13 Insulation Panel, and proximity of Bbshield.
Page3 of 4 i.
,m
_-.-,,e.
.m.
,,,,_.-m.
,. -.,,. r,
Browns Feny, Unit 1 - ASME Coverage - RPV Seam Welds C _5 FtG TOS
- I l
8
! N3C N3D N3A -
N3B 1
i 4
- ...........................i N12 A l
N12 8 e
e c.44 573-g 93 %
BIO.3HIELO
'y C_44
$24 5' G,..
1O
...e 6
!. O O
6 e
L............._
.......................l, m.
is 3:
3:
._2.
=
-,5-N,...
2, 2-x-
Ss S!
S?
C_.,.2 2s.5-4, e,
58 59 39 Nl O
O O
O-1 0 N1B l 0 O le O
O1n 3..
C9H t 125 5" m
H-itt i i t i i e i i t i i i i rt-H-11 l i i l I i 1-ti-Httt1 I i i i i i i i i i i i i i tttil i i i i i i t i ititi
- 0 30 60 90 120 150 180 210 240
. 270 300 330 360 Key:
Weld Location -
.................., ' Areas Accessible from OD.
t..
Page:4 of 4 No or Limited Examination for Welds < 90% ASME Coverage -
+
_-1ee=*,-....<e-w
.-.w.
. - = = -
.--w m
4 v-m.-,-ce--
-e.
.,--..w+-.---rw,-
--ww.a--
-w---
a e-r--,--+-
-w
-+-we.=,
,,y, e s-ce-,,
- c ur
.r--,-..e--
,-+n
-w*
,++-mww w.- e+
-n
-3w-c s
.es.s..,+.-.,,-+--ww--r.reaw,.,,w.-
g L
RPV Excmination COvntman for Browns Farry - Unit 2 L
1 l
W,;Id Weld ID ASME OD Access Total ASME Number Type Coverage %
/ Coverage % Coverage % Comments C-BH-1 Circ 0
18 18 IDexam: No Access OD exam: Access !!mited to area beneath the N1 & NS notzles.
C-1 -2 Circ '
93 No Access '
93
- "= Lwed by sunremance specine hers @ 30,120 & 3m degrus.
OD exam: No Access.
L C-2-3 Circ 63 No Access 63 m nam: Limited by Guide Rods @ 0 & 180 degrees, Core Spray Downcomers @ 172.5,187.5,352.5
& 7.5 degrees, and Survemance Specimen Holders @ 30,120, & 300 degrees.
OD exam: No Access.
C-3-4 Circ 90 2
92 ID exam: Limited by Guide Rods @ 0 & 180 degrees, Nozzk N11 A @ 40 degrees and N118 @ 220 degrees 00 ezam: Requires removal of "Q" panels adjacent to the N 11 A & B Nozzles.
C-4-5 Circ 93 93
- "am: LMed by Guide Rods @ 0 & 180 degrees.
00 exam:
- No additional coverage can be obtained.
C-5-FLG Circ 93 93 10 exam: Limited by Guide Rods @ 0 & 180 degrees OD exam:
- No additional coverage can be obtained.
V-1 -A
. Vert 76 19
- 95 m nam: LWed by Nozzk N2 A @ 30 degrus, and mkal travel mechanism Iwatm.
@ 20' OD nam: Remwas or rip s.2 & o-2 required for coverage V-1-B Vert 76 6
82 o "an:. LimRed by Nozzle N2 E @ 150 degrees, and vertcal travel rnechanism limnation.
@ 140 OD ezam: Additoinai Coverage adjacent to N2E nozzle.
V-1-C
. Vert 76 6
82_-
m um LMed by Nozzk N2 H @ 270 Degres, and mkaHravel mchanism limnation.
@ 260 OD nam: Additoinal Coverage adjacent to N2H nozzle.
V-2-A Vert '
91 No Access' 91 m nam: LWed by Nozzk N16 A @ @ degres
@ 45' OD nam:. No Accus.
Page 1 or ?
L
.m.
a
'<-.,--w-n-r-,.ew-r#--,w~.u,
- mw - -
w
.'n--www-v..-c, r---
-,~...v-
=--e---*,,www-,
v,i-i-wrr-crw--i.vmvi.--r,ve.-.w.-,-+.e
.-w,w
. -e ;
t.c y, 51,.vv,.-r.vw,..-w,cwm,..--.--E,.~~.
-..e,--+-.
RPV Examination Cov~r~q for Browns F:;rry - Unit 2 W:Id Weld ID ASME OD Access Total ASME Number Type Coverage %
/ Coverage % Coverage % Comments V-2-8 Vert 100 Not Needed 100 D uam: No Limdatens.
@ 165*
OD exam: No Exam Naeded.
V-2-C Vert 100 Not Needed 100 0 exam No LimRaUons.
@ 285*
OD exam: No Exam Needed.
V-3-A Vert 70 30 100 m nam: Limited by Feadw#er Sparger & Core Spray piping.
@ 107' oo exam: Removal of RIP P10 & Q11 required for coverage.
V-3-B Vert 65 29 94
'D '"*m:
Limited by Feedwater Sparger, Core Spray piping, N11 B @ 220 Degrees
@ 227' oo tam: Limited due to proximity of N11B nozzle @ 220 Degrees. Removal of RIP P21,022 & O23 are required for coverage.
V-3-C Vert 26 18 44 10 exam: Limited by Feedwater Sparger & Core Spray piping OD ezam: Removal of RIP P32 & 034 is required for coverage.
V-4-A Vert 100 Not Needed 100 D uam: No LimRadons.
@ 45" oo exam: No Exam Needed.
V-4-B Vert 100 Not Needed 100 O nam: No LhRabons.
@ 165*
on exam: No Exam needed.
V-4-C Vert 100 Not Needed 100 O uam: No LimRaUms.
@ 285*
OD uam: No Exam Needed.
V-5-A Vert 86 14 100 S "am: Steam oryu Supp Brami @ w cegren.
@ 90*
oo exam: Removal of RIP T-5 required for coverage.
V-5-B Vert 100 Not Needed 100 O uam: No lbMahons.
@ 210 OD exam: No Exam Needed V-5-C Vert 100 Not Needed 100 i exam: Limite 1 by Feedwater Sparger & Core Spray piping.
@ 330*
oo exam: No Eram Needed Page 2 of4
g Limitation Summnry for Browns Fcrry, Unit 2 - RPV Smm W: Ids with < 90% ASME Coverane W:Id Weld TotalASME Number Type Coverage % Cause for Limitations C-BH-1 Circ 18 ID emam : The Pioneer manipulator design will not allow belt extension to reach the examination area for tNs weld.
OD enam: Access limited to area beneath the N1 & NB nozzies. Additional weld coverage is restricted due to non-removable *D" & *E' insulation penets.
C-2-3 Circ 63 ID ezam: Restricted by Guide Rods @ 0 & 180 degrees, Core Spray D-iiviise @ 172.5,187.5,352 5 & 7.5 degrees, and Surveittance Specimen Holders @ 30,120, & 300 degrees.
00 exam: Restricted by non-removable *M* Insulation panels, and proximity of the B!o-sNeld.
V-1-B Vert 82 ID ezam: Resricted by proximity of Nozzle N2 E @ 150 degrees, and Pioneer vertx:st extension design,
@ 140' 00 exam: Restricted by non-removable insulation Panel (E8 panel), and proximity of Nozzle N2 E.
V-1-C Vert 82 10 exam: Restricted by proximity of Nozzle N2 H @ 270 Degrees, and P6oneer vertical extension design.
@ 260*
00 exam: Restricted trf non-removable insulation Panel (E 16 panel), and proximRv of Nozzle N2 H.
V-3-C Vert 44 I exam: Restricted by Feedwater Sparger & Core Spray piping adjacent to the weld l@ 347' OD exam: Restricted by non-temovable insulation panels M18 N18 & 018.
I Page3 o' 4 m
-.4 u-,,.
.+..#-e.--
,-e.w-.-w-w
-s
--v--
e er m -
=ur,,=3,,
--e
.,a,rr--
ywr
-s,,
,i
+&,-y+r ys y
-.r,,.-,y.-.y,-
or,ca
.m
,s,,,.,.,ew--.,.me,-
,,--y-
.-,y-%t-
F Browns Ferry, Unit 2 - ASME Coverage - RPV Seam Welds l
I i
C 6 FLG 708 *
=%
i G
I I
N3A -
N3B i
i N3C N3D 4
4 4
+
N12 A N12 B
........J e
/
e C45 573
- 93 %
Blo. SHIELD C_-3 4
$24 5
- e,ij e l
81..
e ejl8 e
j e
/
L...............
......................... 2 L.............
(
NO*
1
}!
35 35 C.2-3 391 S
- 63%
N18 A 9 Nie B e T,
9#
9#
N B.
/
"S.*
S" $
S
/
C_1 -2 2G8 5
- 3, 2,
s, Ss Su Su O
O O
O 18 8
O le O
O
{ri N1B l
)
Cent i i i i i t'E*t'I'l i I i i i I I I l-T-I'I T't-t*t'l i i i I i i i i i i i l i i I"I't't-1 i I i l i i e i l't-i'i'i 18 %
I*t't-i 1' i i i i 1 i ii) 125 5*
0 30 60 90 120 150 180 210 240 270 300 330 360
~
Key:
Wold Location
!!!.'! : : !!!!.'!!) Areas Accessibic from OD Page 4 of 4 No or Limited Examination for Welds < 90% ASME Coverage I
-- m
RPV Examin tion Cov wa' for Browns F'rry - Unit 3 W:Id Weld ID ASME OD Access Total ASME Number Type Coverage %
/ Coverage % Coverage % Comments C BH-1 Circ 0
18 18 ID nam: No Access OD exam: Access limMed to area beriesth the N1 & N8 nozzles.
C-1 -2 Circ 93 No Access 93 ID nam: Limned by semam specimen hoWrs @ 30,120 & 3M degrees.
OD exam: No Access.
C-2-3 Circ 63 No Access 63 ID uan LimM by Guide Rods @ 0 & 180 degrees. Core Spray Dmw.we @ 172 5,187.5,352.5
& 7.5 degrees, and Surveillance Specimen Holders @ 30,120, & 300 degrees.
CD exam: No Access.
C-3-4 Cire 90 2
92 10 nam: WW by GuMe Rods @ 0 8180 degrees, Nozzle N11 A Q 40 degraes and N11 B G 220 degrees OD exam: Raquires removal of"Q" panels adjacent to the N 11 A & B Nozzles.
C-4-5 Circ 93 93 ID nam Lt died by Guide Rods @ 0 & 180 degrees.
OD exam:
- No add'tional cowrage can be otAained C-5-FLG Circ 93 93
'D "** Limw ey Gum Res @ 0 & 180 degrees 00 exam:
- No additona: coverage can be obtained.
V-1-A Vert 76 19 95 I nam LimRed by Nozzle N2 A @ 3f) dagrMs, and micaHrawl nahanism UmRaton OD exam: Removat of RIP E 2 & G-2 required for coverage.
V-1-B Vert 76 6
82
'D'"am: Lim"ed by Nozzle N2 E @ 150 degrees, and vertical travel mechanism limitatm OD esam: Adddional Coverage adjacent to N2E nozzle.
V-1 -C Vert 76 61 82 I uom NN by Nozzle N2 H @ 270 Degres, and mticahrawl nechanism hmMatm OD exam: Additional Coverage edjacent to N2H nozzle.
V-2-A Vert 91 No Access 91
'D '"** umited by Nozzle N16 A @ 40 dagrees OD exam: ho Access.
Wold Wold ID ASME OD Access Total ASME Number Type Coverage %
/ Coverage % Coverage % Comments Page 1 of4
- =
RPV Examination Covaraan for}rowns Farry - Unit 3 V-2-B Vert 100 Not Needed 100 O uma No LimRations.
@ 165*
OD exam: No Exam Needed, V-2-C Vert 100 Not Needed 100 D um No WRate.
@ 285' OD exam: No Exam Needed.
V-3 A Vert 70 Yes 100 IDexam: Limited by Feedwater Sparger & Core Spray piping.
@ 107*
00 exam: Removat of RIP P10 & Q11 required for coverage V-3-B Vert 65 Yes 94 D nam: LimRed by Feedwnter Sperger, Core Spray piping, N11 B @ 220 Degrees.
@ 227' 00 exam: Limited due to proximRy of N11B nozzle @ 220 Degrees Removal of RIP P21,022 & O23 are required for coverage.
V-3-C Vert 26 18 44 D umm Limited by Feedwater Sparger & Core Spray piping.
b OD exam: Removal of RIP P32 & Q34 is required for coverage V-4-A Vert 100 Not Needed 100 O nan No WRates.
@ 285' 00 exam: No Exam Needed.
V-4-B Vert 100 Not Needed 100 D um No WRates.
@ 45' OD exam: No Exam Needed, V-4-C Vert 100 Not Needed 100 O nan No WRates.
@ 165*
00 exam: No Exam Neeeed.
V-5-A Vert 86 14 100
- "** steam Dryer suppat er acw @ 94 Degren.
@ 90*
oo o m n,,,,,,,, n ip 7 3,,,c,,,,,,,,,,,,,,,,
V-5-B Vert 100 Not Needed 100 D nm No WRatims.
@ 210' 00 exam: No Exam Needed.
V-5-C Vert.
100 Not Needed 100 0 exam: Limited by Feedwater Sparger & Core Spray piping.
@ 330' oo,,,, n,g,,,y,,g,g, Page 2of &
,~-,~m.
u n-m m
,. m
,_r,
<xwa.-v,-+,r..-wn.
sw.--vn
Limitntinn Summnry for Brnwns Farry, Unit 3 - RPVSc"m W' Ids J
with < 90% ASME Coverane l
l l
l.
W:Id Weld TotalASME Number
' Type Coverage % Cause for Limitations C-BH-1 Circ 18 I nam : The Pioneer manipulator design will not allow belt extension to reach the examination area for this weld.
00 exam: Access limited to area beneath the N1 & N8 nozzles. Additional weld coverage is restricted due to non-removable *D" & *E* Insulation panets.
C-2-3 Circ '
63 ID uam: ' Restricted by Guide Rods @ 0 & 180 degrees, Core Spray Dvm ~~. wi. @ 172.5,167.5,352.5 & 7.5 degrees, and Survelliance Specimen Holders @ 30,120,8 300 deg ees.
OD exam: Restricted by non-temoaabte "M" Insulation panels, and proximity of the Bio-shield.
V-1-B Vert '
82 ID exam: Resricted by proximity of Nozzle N2 E @ 150 degrees, and Pioneer vertical extension design.
@ 140' 00 exam: Rest-teted by non-removable Insulation Panel (E8 panel), and proximity of Nozzle N2 E.
V-1-C Vert 82 10 exam: Restricted by proximity of Norzte N2 H @ 270 Degrees, and Pioneer vertical extension design.
@ 260' Oo emam: Restricted by non-removabie insuistion Panel (E 16 panel), and proximity of Nozzle N2 H.
V-3-C Vert 44 ID nam: Restricted by Feedwater Sparger & Core Spray piping adjacent to the weld
@ 347' 00 enam: Restricted by non-remov.bie insuiation paneis Mis, N18 & 018.
Page3 of 4 v o-mv-*
<rv+-+m------w-<-w,+-
'w--w.e-
- ~
,-em+
y---~
w--
uw~
--+-+
y
--.. ei
+
w
+
+
--n*
.-me.+,.-
.e-.--,w--
-w-+-----
c Browns Ferry, Unit 3 - ASME Coverage - RPV Seam Welds w
ema us g
g l
N3A (-
l N38 i
i N3C N3D i
~
4
}
4 s..
3 I
N.2 A l
N12 B e
ca5 573
- 93 %
O to.5 HtCL O 9
f 9
I,E 8
8..
s 524 5 '
c_34
....e el le e
el le;j e....
j e No o
n a.
S3 3
c2s
. lllllllll 391 5
- ess N....
m n
n C_-1-2 258 $ ~
2, 2,
2, Ss Su So iN O
O O
O le O
O le O
O ri N1B i
j}
c en t i T*I'I~t'l I l i i i l 1 i FIPI'I'Pt't'i i i i i i i i i i i i i i i l't't't'l i i i i i i i i I-1'i'i'i 18%
l'i'1'i'i i i i i i i i i i i i t i 125 5' O
30 60 90 120 150 160 210 240 270 300 330 300 Key:
- Weld Location i!!!!!!!!!.'!!!!!!] Areas Accessible from OD Page 4 of 4 No or Limited Examination for Welds < 90% ASME Coverage
.n
,n
~
- 7..
4 I
i ENCLOSURE 3 i
BROWNS FERRY UNITS 1, 2, AND 3 REACTOR VESSEL SKETCH i
i i
l t
I i
h r
l f
r 5
i l
f 4
t P
I b
[
t, t
I F
h
it REACTOR VESSEL WELD INSPECTION OUTSIDE INTERFERENCES FROM BIO-SHIELD WALL & INSULATION i
MM l
i
=
s
/
M N
4-BIO-SHi@Widk omne>
-J
~
11.25' 3.5' l1 125' 85*
Note 1: Due to aooses bmitations Ultrasonic
.-to to -+
Exarninshone of the RPV seem welds from 025' 7.5" the outsde surface is only possible around
! ?" l e.
[f ;b "
3 the Bio-Shield Wall Nozzle Openings.'
3
?->
M he '
Note 2: Mirror insulabon panels are api,iwd.T.eWf.
3.5 inches thick and the spacing between the
,r4 i yi insulation and the RPV outside surface varies k/'<I;g[j from 0.25 laches to 1.25 inches dependng on the proximity of the insulation stabilizer rings.
~
n SKETCH IS NOTTO SCALE Page 1 of 1
- 9
' 4 ENCLOSURE 4 COMMITMENT
SUMMARY
P 1
1 F
1 T
9 k
I k
n t
t t
t 1
L t
?
t
't i
ENCIDSURE 4 i
e COMMITMENT
SUMMARY
.t t
BFN Unit 2 Reactor Pressure Vessel welds examination will be performed during-l the second inspection interval, t
L r
i
'f 6
t t
i I
4 I
i t
[
4 i;
I i
r i
l r
?
I
?
i.j
..