ML19320D282
| ML19320D282 | |
| Person / Time | |
|---|---|
| Site: | Callaway  |
| Issue date: | 07/01/1980 |
| From: | Bryan J UNION ELECTRIC CO. |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| IEB-80-08, IEB-80-8, ULNRC-362, NUDOCS 8007210198 | |
| Download: ML19320D282 (5) | |
Text
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UNION ELECTRIC COMPANY tsOSORAT80T STREET ST. Louis. MISSOURI auly 1, 1980
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Mr. James G. Keppler ULNRC-362 Director, Region III office of Inspection and Enforcement U. S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, IL 60137 Docket Nos. 50-483 50-486
Dear Mr. Keppler:
EXAMINATION OF CONTAINMENT LINER PENETRATION WELDS
Reference:
NRC IE Bulletin No. 80-08 dated April 7, 1980
Enclosures:
- 1. Appendix D, Specification No. 10466-M-203
- 2. Appendix E, Flued Head Data
- 3. Callaway 1, Penetration Data The above referenced NRC Bulletin identified in-stances where certain non-destructive examinations performed on containment penetration welds at other plants did not satisfy the applicable ASME Boiler and Pressure Vessel Code requirements.
The problems relate to use of ultrasonic in-spections of flued head piping penetration welds which utilized backing bars.
The NRC indicated that radiography has proven to be more meaningful and practical for identifica-tion of defects involving slag and lack-of-fusion for instances where backing bars are used.
The Callaway Units 1 and 2 (SNUPPS) design uses the flued head for penetration connections.
The design utilize:
a full penetration butt weld between penetration sleeve and flued head of the process pipe as illustrated in Figure NE 1120-1, Winter 1975 Addenda to the 1974 edition of the ASME Boilir and Pressure Vessel Code, referenced in the NRC Bulletin.
-The applicable ASME Boiler and Pressure Vessel Code for Callaway is the 1974 edition up to and including the Summer 1975 Addenda.
Radiographic examinations are being performed in accordance with the code.
JUL 3 1980 8007220)qg
t.
Enclosures 1 and 2 supply appendices "D" and "E" of Bechtel Power Corporation Specification 10466-M-203.
These appendices provide the type of weld joint and other details regarding pipe material, size, etc., for all flued head penetration assemblies at the Callaway Plant.
Backing bars or rings are precluded from use with these types of welds. details the present status of examination and in-process repairs for Callaway, Unit 1.
Description of defects and extents of repaired areas are also included.
Completion of work in process is expected within four to six months.
All related Cocumentation will be available at the jobsite.
Welding of the containment boundary on Callaway Unit 2 has not been initiated.
Vefy truly yours, y'Q hvh>
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John K.
Bry l
RWD/rjs cc:
Harold D. Thornburg Director, Division of Reactor Construction Inspection U.S. Nuclear Regulatory Commission Washington, D.C.
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k APPENDlX "D" SPECIFICATION NO.104 66-M-203
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APPENDIX E FLUED HEAD DATA SLEEVE DATA FLUED HEAD DATA PROCESS PIPE DATA DIA llN.I CBORE UN;gD DESIGN CONDITIONS SHT.HO & F.W NO DIA. THICK CBORE QD FIELD LENGTHS gEkk MAT *L D
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NOTES:
s,1. 26.091 INSIDE & 24.959 OUTSIDE REACTOR BUIL INO D
- 2. TYPICAL FIELD WELD NO.: IREFER TO 10466 MS-81 o USE COUNTERBORE DEPTH, Xg
-R SYSTEM DESIGNATORS AB, F074
" " T QUENCE NO-AB MAIN STEAM
-FIELD WELD BM STEAM GENERATOR BLOWDOWN ON THE INSIDE OF THE REACTOR BECHTEL DWG.-
BG t.MEMICAL AND VOLUME CONTROL ButLDING.
(12.052 OUTSIDE la lEv.8 EJ REstDUAL '.' EAT REMOVAL 2
IDE BB ACTOR COOLANT
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CALLAWAY l PENETRATION DATA PENETRATION DRAWING WELD DEFECTS AREA P-1 AB01 F096 SL & P (0"-12")
P-1 AB01 F096R1 SL (0"-12")
P-1 AB01 F096R2-SL (0"-6")
P-1 AB01 F096R3 ACCEPT P-2 AB01 F098 ACCEPT P-3 AB01 F100 P& SL (132-0),(120-132),(84-96),
(72-84) & (96-108)
P-3 AB01 F100R1 P & SL (84"-90") & (108"-114")
P-3 AB01 F100R2 WORK IN PROCESS P-4 AB01 F102 SL (90"-96")
P-4 AB01 F102R1 ACCEPT P-5 AE05 F039 ACCEPT P-6 AE04 F037 SL, SI & P 40-1/2 - 54 P-6 AE04 F037R1 ACCEPT P-7 AE04 F038 ACCEPT P-8 AE05 F040 SL, SI & P 24-36 & 36-48 P-8 AE05 F040R1 ACCEPT P-9 LM01 F002 P
23-1/2 - 34 P-9 BM01 F002R1 ACCEPT P-10 BM01 F005 P
23-1/2 - 34 P-10 BM01 F005R1 ACCEPT P-ll BM02 F002 ACCEPT P-12 BM02 F005 ACCEPT P-22 BBil F003 ACCEPT
'P-23 BG22 F024 ACCEPT P-27 EJ04 F001 WORK IN PROCESS P-39 BB09 F003 WORK IN PROCESS P-40 BB07 F003 ACCEPT P-41 BB08 F003 WORK IN PROCESS P-52 EJ04 F018 WORK IN PROCESS P-79 EJ04-F038 ACCEPT
- P-80 BG23 F001 WORK IN PROCESS P-82 EJ04 F041 WORK IN PROCESS
- Those welds which are designated with R1, R2, or R3 as the last two digits, indicate the repair weld of the original sequenced numbered weld.
..