ML18057A724
| ML18057A724 | |
| Person / Time | |
|---|---|
| Site: | Palisades  |
| Issue date: | 01/28/1991 |
| From: | Brian Holian Office of Nuclear Reactor Regulation |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 9102040033 | |
| Download: ML18057A724 (44) | |
Text
e UNITED STATES e
NUCLEAR REGULATORY COMMISSION
.WASHINGTON, D. C. 20555 January 28, 1991.
Docket No. 50-255 LICENSEE:
FACILITIES:
SUBJECT:
Consumers Power Company Palisades Generating Plant
SUMMARY
OF MEETINGS *WITH CONSUMERS POWER COMPANY (CPCo)
PALISADES PLANT January 8, 1990 -
Small Bore Piping and Narrow Gap Welding
- January 9, 1990 -
Design Piping Issues Consumers Power Company (CPCo) recently inspected two sample sets of fillet welds (totalling 79 welds) on design Class 1 small bore piping at the Palisades plant. A large number of t.he welds (47) did* not satisfy the original design code fillet weld size requirement.
CPCo informed the staff of the results of the inspections, and contracted with Sargent & Lundy to evaluate the undersized welds and determine their acceptability. The first half of the meeting on January 8, 1990 was used to discuss the contractor's evaluation results. A list of meeting attendees is provided as Enclosure 1.
Sargent and Lundy reported that all but 3 of the 79 welds included in the samples satisfied the requirements of a staff approved ASME Nuclear Code Case (N-316).
The three remaining welds were considered acceptable based on a recent Code Addenda (1989), which has yet to be approved by the staff. provides the handout from the meeting.
The staff questioned the application of t~e 1989 Addenda.
Additionally, the staff raised concern that no statistical approach had been used to address th~*
acceptab.ility of the remaining, unsampled, small bore piping.
(Total small bore socket welds by category: Class 1, 341 welds; Class 2 and 3, approximately 1000 welds.) These issues, -along with several related questions, were left to be resolv~d* at a future meeting.
(Note:
CPCo informed the Project Manager by phone on January 18, 1990 that the three welds which did not meet a staff approved code would be modified. A
~ollow-up meeting will be scheduled to d~scuss other small bore piping concerns.)
The second half.of the meeting on January 8, 1990 was utilized to update the staff on the status of the narrow gap welding process. This innovative welding process was used on the primary coolant system piping cuts necessary for the PaHsades.Steam Generator Replacement Project (SGRP).
Six of the ten piping cuts required substantive weld repairs prior. to achieving acceptable weld examinations (RT).
- Representatives from Bechtel (SGRP primary contractor) and 9102040033 910128
~ : "
SDR ADOCK 05000255 j ) !
PDR r
- . -* ~- I.
r* 10032
-2~
Kr~ftwerk-Union {narrow gap welding contractor) provided an in-depth presentation summarizing the various weld defects and subsequent weld repairs.
Separate root cause investigations, conc~n_trating on shielding gas flows and material compositions, are continuing by both contractors. Final root cause reports will be provided to the staff when completed. provides the handout from that meeting.
On January 9, 1990, the staff met with representatives from CPCo and Bechtel to discuss open items from an ongoing inspection of piping modifications performed during the current SGRP outage. A list of meeting attendees is provided as.
Numerous facility change packages were discussed.
Bechtel provided their rationale and decision~making process for several design-related questions which*had arisen from the onsite inspection activities. Most of the items were resolved; however, several issues relating to both the design and review process, and individual modifiCation packages, will have to be re-addr~ssed following CPCo investigation.
Brian E. Holian, Project MaDager:
Project Directorate 111-l Division* of Reactor Projects 111/lV/V
Enclosures:
As stated.
cc w/e.nclosures:
Se~ next page Kraftwerk-Union (narrow gap welding contractor) provided an in-depth presentation summarizing the various weld defects and subsequent weld repairs.
Separate root cause investigations, concentrating on shielding gas flows and material compositions, are continuing by both contractors. Final root cause reports will be provided to the staff when completed. provides the handout from that meeting.
On January' 9, 1990, the staff met with representatives from CPCo and Bechtel to discuss open items from an ongoing inspection of piping modifications performed during the current SGRP outage. A list of meeting attendees is provided as.
Numerous facility change packages were discussed. Bechtel provided their rationale and decision-making process for several design-related questions which had arisen from the onsite inspection activities. Most of the items were resolved; however~ several issues relating to both the design and review process, and individual modification packages, will.have to be re-addressed following CPCo investigation. *
Enclosures:
As stated.
cc w/enclosures:
See next page.
DISTRIBUTION.
CENTRAL FILE NRC & LOCAL PDRs PD31 R/F FMIRAGLIA JPARTLOW BBOGER
- JZWOLINSKI LMARSH
JWECHSELBERGER LA/PD31:r S~~E~OR l!p91 Brian E. Holian, Project Manager Project Directorate III-I Division of Reactor Projects III/~V/V PM/PD31:DRP345 '
BHOLIAN "1fV\\.
l/~/91
~
D/PD31:DRP345 LMARSH l/Z,S /91 PALISADES MTG
SUMMARY
Mr. Gerald B. Slade Consumers Power Company cc:
M. I. Miller, Esquire Sidley & Austin 54th Floor One First National Plaza Chicago, Illinois 60603 Mr. Thomas A. McNish, Secretary Consumers Power Company 212 West Michigan Avenue Jackson, Michigan 49201 Judd L. Bacon, Esquire Consumers Power Company 212 West Michtgan Avenue Jackson, Michigan 49~01 Regional Administrator, Region III U.S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, Illinois. 60137
. Jerry Sarno Township Supervisor Covert Township 36197 M-140 Highway Covert, Michigan 49043 Office of the Governor Room*l - Capitol Building*
Lansing, Michigan.48913 Mr. David J. Vandewalle Director, Safety and Licensing Palisades Plant 27780 Blue Star Memorial Hwy.
Covert, Michigan 49043 Resident Inspector c/o U.S. Nuclear Regulatory Commission Palisades Plant 27782 Blue Star Memorial Hwy.
Covert, Michigan 49043 Palisades Plant Nuclear Facilities and Environmental. Monitoring Section Office Division of Radiological Health P.O. Box 30035 Lansing, Michigan 48909 Gerald Charnoff, P.C.
Shaw, Pittman, Potts &
Trowbridge 2300 N. Street, N.W.
Washington, D.C.
20037 Mr. David L. Brannen*
Vice President Palisades Generating Plant c/o Bechtel Power Corporation
- 15740 Shady Grove Road Gaithersburg, Maryland 20877
NAME Brian Holian David Vandewalle Kerry A. Toner James L. Topper John R. Fair
.James A. Gavula Duane Danielson John M. Jacobson L. B. Marsh T. 0. Martin R. W. Jackson F. C. Breismeister G. T. Kitz Rolfe B. Jenkins Bruce L. Jorgerisen
- Arnold Lee
- .Jim Norberg
. Terrance Chan -
Phil Flenner
- Jerome-Nordby Richard Rut Alan_ K. *Beckman.
Ron Beck Dieter Pellkoffer Erhard Brueckner Jim.Lewis MEETING ATTENDEES JANUARY 8, 1991 CONSUMERS POWER & NRC AFFILIATION NRC/NRR/PD31 CPCo Palisades CPCo Palisades CPCo/ESS Engineering NRC/MEB-NRC/RIII NRC/RI II NRC/RII I NRC/NRR NRC/RII I Bechtel Bechtel Sargent & Lundy CPCo Jackson
- NRC/RI I I-NRR/MEB NRC/MEB NRC/MEB CPCo/ESS Engineering CPCo/PCE Bechtel/KWU/Alliance Bechtel Project Manager Becthel *-. ~ss. Project Manager
- siemens/KWU Siemens/KWU CPCo
Summary of Problem
- Original code of construction 1967 831.1 ENCLOSURE ti_
- rt
_:i
- . Consumers Power -:'.
Undersized Socket Weld NRC Presentation 01-08-91
- Recently committe~ to augmented weld inspection program
~
- All welds are acceptable
- Pres.entation goes into details M4120.018 01-llt
.Cansumen Power Campany
Overall, Scope of Undersize~ Welds Report M4120.00201-91
,1
- *Demonstrate.weld~ meet code size req~irements
- . Small bore piping satisfies Palisad.es. FSAR stre~s limits Generically Detailed evaluation o~ samples
- Still maintain margins **
Consumers Power ;,
Undersized Socket Weld ::
NRC Presentation 01-08-91
- '* i SARGENT'& LUNDY
Piping co*de Design* *Goals 1114120.003 01-91
- Prefer bala-nced design (all components equal)
Not often. achievable,
- Code "adjustment"- mech.anisms are-Size criteria Stress intensifiCation factors, "i"
- Code applies these base~ on
- _Industry practices Test data
-*'1' Consumers Power *,
Undersized Socket Weld *1
. NRC Presentation :.
01-08-91 :,,
SARGENT & LUNDY -.,
Socket Weld Figure
~omlnal pipe wall thickness
. t n
= Pipe nominal wall thickness t min = Pipe ininim~m wall thickness t 1
=.Fitting minimum wall thickness*
- Cx
- Weld size
. Consumers Power Undersized Socket Weld NRC Presentation
'01-08-91.
umo.001 01-e1 SARGENT & LUNDY
' e
History of Code Fillet Weld Requir.ements Minimum*
Vear Code Weld Size
- 1955 831~1 1.2510 1967 831.1 1.2510 Summer '73 831.1.
1.25tmln
- 1.09t0 Summer '73 SECT Ill 1.09t0 Summer '74 831.1 1.09t0 M-4120.010 01-91 Consumers Power*
Undersized Socket Weld:
. NRC Presentation*
01-0S..91 1.
(SIF)
"i" 1.3 1.3 2.1 2.1 e
2.1 SARGENT & LUNDY
History of Code f'.illet Weld Requirements
- Minimum
. Year Code-.*
- Weld Size
- 1981 m, ~316 0.7511.
v 1.09t.; 1 /16" Winter '82 SECT 111 undersizing Summer '82 SECT Ill 1.09tn or 1.4tn Summer *93*,
- _*SECT Ill_
1.09tn
- 89 Addenda SECT Ill 0.75tr1 M4120.011 01-91 Consumers Power Undersized Socket Weld NRC Presentation 01-08-91 (SIF)
"i"
~2.1 2.1..
- 2.1 or 1.3 1.3 to 2.1 1.3 to 2.8 SARGENT & LUNDY "ti e
Reconciliation of Cod,e*.use Consumers Powe.r Undersized Socket Weld NRC Presentation 01-08-91 (Detailed Discu~sio.n in Repor~)*
M4120.004 01-91
- . ~eviewed basis for all related-code fillet weld criteria
- Established basis for changes in code Driven by inspection requfrements, not researcl:I findings.
Related requirements are stress intensification factor "i," must-be related to weld size
- Section Ill Subsection NC fillet weld rules best suited for evaluation of Palisades
.. Consistent with original design philosQphy of Palisades plping and blance of plant For sniall ho.re evaluation it is more conservative than Section Ill Subsectlon NB; Usec;t Palisades criteria and equations, not the more liberal
- 1989 NC subse*ction allowables an related. equations SARGENT & LUNDY
.~.;
Consumers Power Undersized Socket Weld Criteria Used to.Screen 79 Welds. i.n.Sampl*e NRC Presentation 01~08-91*
Acceptance.
Acceptable.
Cumulative Number Criteria Basis Welds Total
.1 e~ ~ 1.25tn *. *.
831.1 '67 32 32 2
ex~ 1.09tn*
- 831.1 '13 27 59 3
ex~ 1.09ta, 831.1 '73 10 69 w/throat 4
ex~ 0.75.t1 CC N...;.316.
. 7.
76
.s ex.~ 0.75t~
Ill, '89 ADD.
O*
76 6
- :**ex~ 0.75t.n*:.:
- 111, '89. ADD.
..2*.
78 w/10% *
- 7 ex~ 0.75~~
Ill, '89 "DD.
1 79 w/10% & *throat.
SARGENT & LUNDY i
M4120.015 01-91
Technical Basis' for.Evaluation*
Taken from Palisad.es FSAR Consumers Powet Undersized Socket Weld.
NRC Presentation
. 01-08-91: ".
---~---------------------------~'"
M4120.Cl05 01*91
- Operability : '.
P+.WTs~v"..
P +WT+. SSE S2Sy.
- P+*WT+THSSA+Sh
- Updated desi9n basis*
- 1 I
SARGENT & LUNDY 1*
'\\
Satisfaction of Palisades Code and FSAR Requirements*
Generic qualification
- P +WT+ OBE/SSE Factor of safety > 3 with SIF of 2.8
- Thermal Stainless steel good with SIF of 2.6 M<4120Jl08 01-91
,1 Consumers Power Undersized Socket Weld*
- NRC Presentation'.*
01-08-91 I -
SARGENT & LUNDY I
Satisfaction of Palisades Code and FSAR Requirements Detailed Results for Welds in Sample Maximum Stresses for Undersized Welds Normal Upset Faulted Eq 11 Eq 12b Eq 12d (psi)
(psi)
(psi).
Sample A
' 4,790 7,760.
12,200 Sample B 5,214 14,7n
. '24,340 IU 120.013 01-91 Thermal Eq 13 (psi) 32,800 22,861
~,
).
Consumers Power Undersized Socket Weld'*
NRC Presentation :*
01-08-91 :
e Combined Eq 14 (psi) 37,600
'27,936 e
SARGENT & LUNDY
Satisfaction of Palisades Code and FSAR.Requirements*
Detailed.*Results for Welds in Sample
. ~.
- 1
I
- ii,'.
- ~
Maximum* Str.esses *for All Welds in Sample I
Normal
- Upset Faulted Thermal
.Combined Eq 11
.Eq 1;2b Eq 12d
. Eq 13 Eq 14 (psi)
(psi)'
- (psi) *
. (psi)
(psi)
Sample A 11,600 18~200 26,900 42,500 45,700 Sample B 8,623
' 19,030
. 35,994 37,985 43,747 e
Mo4120.014 01-91 SARGENT & LUNDY
- FSAR Operability Margin*s M4120.00701"91
50% margin based on strength Consumers Power*
Undersized Socket Weld*:
NRC Presentation::
01-08-91 :'
SARGENT & LUNDY
.
- Add.itional Margin Not Considered
- Marki fatigue curves
- ASME code case N-462 Give factor of nearly tWo on allowable$
M4120.008 01-91 Consumers Power.
Undersized Socket Weld'*.
NRC Presentation.~
01-08-91:
SARGENT & L1JNDY
- ~ "
I Consumers Power::
Undersized Socket Weld ~:
Conclusions M4120.00901-91
- All welds as found are acceptable.
- No weld modifications are needed *
- . Demonstrated operability as found for all small bore piping
- Satisfy code weld size and.stress requirements for all small bore piping for worst.welds found NRC Presentation :
I 01-08-91 ::
- e SARGENT & LUNDY
I
. _;~~. ~,.,.
- =.~--
,c,...,-..*
,,_.~~---:*.*.. :_,-_,__
--"*~*, __, *.,.. __. - '*.....,.. _,. '~--* ~*oo *, --e... *. -**-=*-
- -~-*
~-.: ** _ '.
PALISADES SGRP
..NARROW GAP WELD PROCESS/REPAIR AGENDA
- INTRODUCTION*
W. CLARK
- OVERVIEW'OF Pcs* -.
A. BECKMAN
\\\\'ELDS
- DESCRIPTION OF F. BREISMEISTER.*
\\\\'ELD -DEFECTS
. - FINAL WELD JOINT.
A.. BECKMAN
~
..- CONFIGURATION AND * :.
REPAIR.WELDING.
. P~ FLENNER-**
- STATUS OF ROOT
~. BREISMEISTER/ *
-... CAUSE INVESTIGATION R. RUF.
"*. i
. -"'-*.. *. __,.... -~ *:* '. e.' *...,..
.. _,.. - *. _, o**-
....... _,.. 9 *_
'T'
~..
~- - -
- DESCRIPTION OF WELDS PERFORMED
~ RESULTS OF INITIAL WELD
- RADIOGRAPHY
~
~
-. ~
~*
~.
- - PALISADES SGRP
DESCRIPTION -c)F*. WELris PERFORMED
- o HOT LEGS:
- . 2 - 42n ID, 4 1/2"THICK (WtA), (WlB) * *.
o COLD LEGS: -*
~.
8 -.30".ID, 3 l/:Z'~-*THICK (W3A, W4A, W5A, W6}\\) *
. (W3B,_W4B, W5B, W6B)
~
.- o PIPING: CARBON.STEEL WITH.. 1/4".*+/- STAINLESS STEEL ID CLADDING
-~..
. -3;.. *~
I 11 ***
It}
- ,f
'I
\\!
II
~'.
i
~
1:
1;
\\i
- I.e.
I PCS
- WELDING I CUTTING NUMBER MA~
Harrow Grooye Weld Dttall Aral Ma[Jdngs (Welds poll) sumx Lettera 2*
- ~. "*
I,*.
10-20 mm A Bt*ctor Cpol1nt PIQlng Amng1n11nt Plan Weld I Cut Dnlqnallona
'2*
30-55 mm
!}
e 0 <:
. t1j
- ti
- ~
H t1j i.t-4
~
H
'.tn
~ >
0 M
~
1:tn
- en Cil I
.::ti ttj e
- - PALISADES SGRP. *
-_
- _* *OVERVIEW OF* PCS WELDS RESULTS *oF WELD RADIOGRAPHY o HOT LEGS o WlB - WELDED, RADIOGRAP:SED, ACCEPTED o WlA - WELDED, RADIOGRAPHED
- ONE REP AIR,
- REPAIRED MANUALLY FROM OD, RADIOGRAPHED,
. ACCEPTED o COLD LEGS o*
WSB - WELDED, RADIOGRAPHED, ACCEPTED I
0 0
0 RESULTS OF WELD RADIOGRAPHY (continued)
W6B - WELDED, RADIOGRAPHED *
. * - TWO.REPAIRS, REPAIRED, RADIOGRAPHED,
.~ * * ~. ACCEPTED.
~
REMAINING 6 COLD LEG JOINTS WELDED, RADIOGRAPHED
. NUMEROUS INDICATIONS.WERE APPARENT
.'v.
o OFFSET AND PARALLAX. RADIOGRAPHY PERFORMED
- TWO. GENERAL DEFECT CONDITIONS DETERMINED TO.EXIST:,
o LINEAR INDI.CATIONS o SIGNIFICANT. POROSI1Y IN THE WELD
- AMOUNT/1YPE VARIED PER WELD e
o ULTRASONIC EXAMINATIONS ALSO PERFORMED TO FURTHER.,
LOCATE, CHARACTERIZE INDICATIONS
- ~
. PALISADES SGRP DESCRIPTION OF WELD. DEFECTS TYPICAL NG WELD DETAIL
-
- NG WELD RADIOGRAPHIC INDICATIONS
["""\\
- a a
- ---=-
- -.:..::*.. **.!-~-
~-*~
~-... ~.: -: i
- I....* "-":'- -
,:o* *.
' "'. ~--* * **
.- ' *-*'.. c ** *. *o* ' ':~-... *.***-
PALI.SADES SGRP DESCRIPTION Of WELD DEFECTS TRANSITION VELD FOR ISI.
t..J
~
LI') -
- E
- Q Q
.. EXISTING PIPE*
- VARY! NG ---.-..........._
POROS I. TY,.
- ( TYP ).
. CARBON STEEL.
. SIG NOZZLE..
LINEAR ---
.-1..... ~
I ND I CA TI ONS
- .. ER309LCb.
ROOT-. -
SQUEEZE AREA.
. EL-8.
TRANSITION WELD
- TYPICAL NARROW GAP WELD DETAIL ELBOW STAINLESS.
.-STEEL*
CLAD
- Pl\\I.TS/\\OES SGRP DESCRIPTION OF WELD DEFECTS NARROW GAP WELD RADIOGRAPHIC.INDICATIONS INDICATION TYPE WJA W4A W5A W6A WJB W4B W5B W6B LINE POROSITY "X
x x
x x
OTHER SCATTERED POROSITY x
x x
LARGE POROSITY x
LINEAR INDICATIONS x
x*
x x
x NOTES:
- 1.
POROSITY RELATED INDICATIONS ARE MORE IN MAGNITUDE THAN LINEAR INDICATIONS. *'
e
P/\\LTS/\\OF.S SGRP DESCRIPTION OF* WELD DEFECTS NARROW GAP WELD RADIOGRAPHI~* INDICATIONS LINEAR INDICATIONS:
LARGE POROSITY:
..... ~*.*.*..**
LINE POROSITY:
- 1*:'--r.,. L**~
- 9\\ *"' ***, **t-t-r ~.. ** -. * * : *
- ti!'"
I i;
EDGE OF CAP (TYP)
I
e
,.,....... -'"*.. *. *c.. e_,,... _
. -=*
PALISADES SGRP FINAL WELD JOINT CONFIGURATION AND REPAIR WELDING
- TYPICAL.WELD JOINT EXCAVATION
-. EXCAVATION AREAS SG A.
.. -*EXCAVATION AREAS SG B
.. * * * - WELD REPAIR.MAP OF WELD W3A.*.;:_.*
~
- TYPICAL FINAL.WELD.JOINT. *.
. *CONFIGURATION
- ~ CURRENT STATUS OF WELDS l
. ~..
PALISADES SGRP FINAL WELD JOINT CONFIGURATION AND REPAIR WELDING WIDTH OD EXCAVATION l NGW
ELBOW SIDE MAX. CLAD I
- ~-*-*********--... !....................
\\:
\\
\\ I.
ER 80 S-G \\
EL 8
\\ \\
ER 309 L Cb\\
ER 308 i. SI
\\'***
_____ J CLAD/
WIDTH ID EXCAVATION
J I I
i i
j i
i. :
~ f
! f j i /
_ _,,/
NOZZLE I PIPE SIDE n
. I'
FINAL WELD JOINT CONFIGURATION AND REPAIR WELDING ACTUAL DIMENSIONS OF EXCAVATIONS
- SG A WELD W3-:A W4-A W5-A W6-A I
DIMENSION DEPTH OD WIDTH OD DEP'J'H JD WIDTH JD DEPTIJ OD WIDTH OD DEPTH JD WlDTH lD DEPTH OD WlDTH OD DEPTH JD
- WJDTH lD DEPTIJ OD
-WJDTH OD DEPTH lD WJDTH lD
\\
00 2.04" 2.70'_'
l.15 1.1 1.50" 3.06" 2.64" 1.10" 1.30" 2.70" 3.30" 1.. 26" 1.70
1.18" 2.13" STEAM GENERATOR A I I
I ' \\
/
POSJ'i'ION 90° 2.13" 2.16" l.85 11 1.31" 3.28" 2J>6" 1.50" 2.49" NO EXC 1.18" 1.70"
.87'.'
1.5i"
/
180° 2.11" 2.06" 1.20" 1.56" 3.05" 2.61"
.1.46" 1.73" 2.34" 2.72" i\\VATJON 1.21" 1.70" I
I I
270° 1.65" 2.55".
1.25" 1.32" 3.05" 2.80" 1.18'..'.
1.27" 2:28" 2.61" 1.25" 1.70" 1.29" 2.2.i"
.'):....
- ~:- r ~.. :*
e " -_
-- PALISADES- -sGRP -
FINAL WELD JOINT CONFIGURATION AliQ REPAIR WELDING ACTUAL DIMENSIONS OF EXCAVATIONS SG B WELD W3-B W4-B W5-B W6-B DIMENSION I
I I
I ' ' ' \\
DEPTH OD WIDTH OD DEPTH lD WJDTH lD DEPTH OD WJDTH OD DEPTH JD WJPTH lD DEPTH' OD WJDTH OD DEPTH JD WJDTH lD DEPTH OD
. WJDTH OD DEPTH-JD WJDTH JD I i 00 1.95" 1.79"
.38".
2.57"
.58" 1.71" STEAM GENERATOR B
/
I I.
\\
POSITION 90° 1.82" 2.14" NO EXC
.38" 2.43".
NO EXC NO EXC
.53" 2.29" NO EXC
/
180° 1.80" 2.08"
~VATION-1.01" 1.86"
.45" 1.JO"
~VATION
~VATION IWATION.*
I.
I l.
I I
I I
- 90°
'\\.
270° 1.97" 2.29" 1.31" 2.29"
.59" 1.06"
.... -\\
ll.=B 01......,.... ___ _
,..-2'70<>-,.1 BO/
II I
C..... "
I I I.
, 1 I -
.._..-~---*
I U1 I
."l *
'l.'
- ~LD__lIBEl\\~IR~C~O~LliJ..,EG_0.1 ___
- *WJD_Tll_ANJlJJEETll OF EXCA V /\\TlON_S w0=A_:_ __
- on INCH
- O
12"
- 24"
~6".
.itff' 11cr*
72" n-t" 96" ton" 114"
'-~~-'-~~~~-~~-'-~~~I~~--'~~~-'-~~~'--~~-'-~~~'---'
Dt~GREE
- 210° 11100 90°
'--~~~~~~~,.---~~~~~~*
J-~~~~~~~~~~~~~.,--~~~
- .::~::::::.::::.::: :::.::::::::.::::.:::: *:::.::::.::::.::::.:::: :::.::::.::::.::::::::.: :.::::::.::~9?-,Z~.'.f~,SJP:.:~:=:.:::* :::::::.::::.::::.:::~: ::.:::~:::.::::.:::::.: _::.::::.::::.::::.::::.:. :.::::.:::: **-~* SAFE F.ND
................ ~:~~!~~~~~- ~~~.!:~~---~---~---~~~
... ~--.~---~--~---~---~---~--~--~--~-~---~---~---~***~--~-.. ~.
- ~**'~---~---~---~---~--'~-,~,,,~,~~:.!~~-~~::~:,~: -~~~~!::~~~~~!~~~~-~~--~~:......
W~LO
- :...
- I-.,_ * -
- <i;,. N G.W
- ~::::::::::::: :::::::::::::::.................. :::::: ::::::::::::::::::::: :::::::........... *************-*****.............. :::::: ::............... ~:* :::::::::::::::::*~~~ _t f.Lnow *SIDE J"
0
~
O ~
- I t=**u**.. **uu*l****U****u*u*,****l******.."**u:'*uu**l.. *********uu**u*l***u*******':...... :1**********************1************~*******1****** **.*****:*uul********:***********I****:***~*
~ f!l 2......................................... ***.****~ *:......................
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. :::;: 0 3.................... ************-********.....,................. :............ :... :............ :..... **************-*****.................... *****-***-*********............... :.............
1...
. BJ
- Safe end wel_d
- materiai exposed: buttering required before welding.
~
. W~T2 0..
12" 24" 36"...
48" 60" 7'?;'
84" 96" 108" 114" 270° 100" 90° NOZZLE SIDE NGW I" /
~
~ ~ r1*............. _******l**:_******************l************.**********1. u
...*..... 1**********************1********************1
- - mi ******-***.*******1*********************1::...... :1-*.
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'FI-NAL WELD JOINT CONFIGURATION AND REPAIR WELDING E 7018 El.BOW filDE WIDTH OD
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PALISADES SGRP FINAL. WELD JOINT CONFlGURATION
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- CURRE*NT WELD STATlJS (As** of 1/8/91).
WELD ID.
WEI,.D/WELD REPAIR ID/OD PT OD MT RT PWHT WlA x
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PALISADES SGRP STATUS_ OF ROOT CAUSE INVESTIGATION
. PALISADES SGRP
- STATUS OF ROOT CAUSE INVESTICATION o MORE THAN ONE TYPE INDICATION
- POROSITY*
- LINE POROSITY
- LINEARS o PROBABLY MORE THAN ONE CAUSE o BASE MATERIALS. - STEEL. *.
-*CLADDING o WELDING WIRES - STAINLESS
- TRANSITION
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e STATUS.* OF ROOT.. CAUSE INVESTlCATION (continued) o SHIELDING GAS
,o MATERIALS PRIOR TO INSTALLATION. WELDING
. ELBOW CUT OFFS
- WELDING WIRES.
.GASES IN.. TANK AND*SYSTE.M
- o CONFIRM COMPOSITIONS AND EVALUATION CONTAMINANTS.*:~
. o WELD S,PECIMEN (BOAT-SAM.~LE)
COMPOSITION
- . METALLOGRAPHIC NEAR OD
. -~'CHIEFLY POROSITY
- - MINOR LINEAR !
STATUS OF. ROOT CAUSE INVESTICATION (continued) o REVIEW OF* WELD LOGS/RECORDS
NAME Brian Holian Gary Davis Kerry Toner Gerald Brown
-James Lewis.
Ken Chao
-Pete Carrato Raj Parekh Rama Ganti Rick Jackson C. E. Carpente'r B. L. -Jorgensen Duane Danielson John Jacobson Jim Gavula John Fair Arnold Lee *
- .¥'>.:
MEETING ATTENDEES JANUARY 9, 1991.
CONSUMERS POWER & NRC AFFILIATION NRC/NRR -
CPCo CPCo Bechtel.
CPCo
- CPCo Bechtel Bechtel Bechtel Bechtel NRC/NRR
-NRC/RI I I NRC/RIIl.
NRC/RII I
. NRC/RI II *
. NRCJMEB.
NRC/MEB.. :
Kraftwerk-Union (narrow gap welding contractor) provided an in-depth presentation summarizing the various weld defects and subsequent weld repairs.
Separate root cause investigations, concentrating on shielding gas flows and material compositions, are continuing by both contractors. Final root Gause reports will be provided to the staff when completed. provides the handout from that meeting.
On January 9, 1990, the staff met with representatives from CPCo and Bechtel to discuss open items from an ongoing inspection of piping modifications performed during the current SGRP outage. A list of meeting attendees is provided as..
Numerous facility change packages were discussed.
Bechtel provided their rationale and decision-making process for several design-related questions which had arisen from the onsite inspection activities. Most of the items were resolved; however, several issues relating to both the design and review process, and individual modification packages, will have to be re-addressed following CPCo investigation.
Enclosures:
As stated cc w/enclosures:
See next _page DISTRIBUTION CENTRAL FILE NRC.& LOCAL PDRs PD3i R/F FMIRAGLIA '
JPARTLOW BBOGER J.ZWOLINSKI LMARSH BHOLIAN,
OGC EJORDAN NRC PARTICIPANTS ACRS( 10)
JWECHSELBERGER.
LA/PD31:r S~E~OR l/~91 Brian E. Holian, Project Manager Project Directorate III-I Division of Reactor Projects III/IV/V frv' PM/PD31:DRP345.0 BHOLIAN rJJ!y....
D/PD31:DRP345 LMARSH 1/~/91 l/2S /91 PALISADES MTG