ML19320D212
| ML19320D212 | |
| Person / Time | |
|---|---|
| Site: | McGuire, Mcguire  |
| Issue date: | 07/07/1980 |
| From: | Parker W DUKE POWER CO. |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| IEB-80-08, IEB-80-8, NUDOCS 8007210114 | |
| Download: ML19320D212 (9) | |
Text
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373-4083 i
Mr. James P.-O'Reilly, Director U. S. Nuclear Regulatory Commission Region II 101 Marietta Street, Suite 3100 Atlanta, Georgia 30303 Re: RII:JPO McGuire Nuclear Station Docket Nos.~50-369 and 50-370
Dear Mr. O'Reilly:
In response to your letter of April 7, 1980 which transmitted IE Bulletin 80-08, we wish to advise that a review of the flued head design for penetration con-nections and other designs with containment boundary butt welds between the penetration sleeve and process piping has been conducted.
There are peneErations with flued head which contain butt joints at the McGuire Station.
The penetrations were purchased to the ASME B&PV Code, 1971 Edition,Section III, Subsection NC including the Summer 1971 Addenda.
Regulatory Guide 1.19 does not apply to our piping penetration assemblies.
The bett joints attaching the piping to the flued head were examined by the volumetric and shrface non-destructive (NDE) methods during the construction of the penetrations.
The welds attaching the piping to the flued heads are of the butt joint design, utilizing a single V-groove weld without backing bars (rings). There are eight different types / sizes of penetrations at the McGuire Station.
(See' Appendix I.)
As a result of the NDE, repairs were made to welds in 22 of 86 penetrations (see Appendix.II).
OFFICIAL COPY.
80_07210//I Q
- 4-Mr. James P.-O'Reilly, Director July 7, 1980 l
Page Two Ultrasonic (UT) examinations were performed on the welds attaching the guard pipe and the outer sleeve to the flued head on the larger diameter pipes. A more meaningful examination of these welds is possible with UT due to the j
thickness of pipe and geometry of the penetration. No backing bars (rings) were used thus the geometric reflection from that penetration geometry do not exist.
Radiographic (RT) examinations would not have provided meaningful exam,ination results during construction of the penetrations.
V ry truly yours, 7
/
s.
& Q e
William O. Parker, Jr.
RWO:scs Attachments cc: ' Director Division of Reactor Construction Inspection U. S. Nuclear Regulatory Commission Washington, D. C.
20555 4
APPENDIX I: T'IPES/ SIZES OF MCGUIRE PENETRATIONS Type I and II (Same design but different sizes)
( 16 3 r
y HD I [*
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5 y
HD Type I Size Type of Material 1.
Process Pipe 31 1/2" 0.D.
SA 106-Gr. C 1 1/4" WL 2.
Guard Pipe 40" 0.D.
SA 155 Class 1 KC70 In gg 3.
Outer Sleeve 54" 0.D.
SA 516 Gr. 70 1/2" WL 4.
Flued Head SA 105 Gr. II Welds NDE Methods Used No. 1 RT No. 2 PT and UT No. 3 PT and UT
I f
APPENDIX I: TYPES / SIZES OF MCGUIRE PENETRATIONS s
Type I and II (Same design but different sizes)
Type II Size Type of Material 1.
Process Pipe 18" O.D.
SA 106-Gr. B
-0.937" WL 2.
Guard Pipe 24" 0.D.
SA 106-Gr. B 1.218" WL 3.
Outer Sleeve 36" 0.D.
SA 516-Gr. 70 1/2" WL 4.
Flued Head SA 105-Gr. II 3
- No. 1 RT No. 2 RT No. 3 PT and UT 9
TYPE III SERIES 1, 2, 3 AND 5 Ah'D TYPES IV AND V (These penetrations are all of the same design but differ in size and type of material) g42 b)l i
- 1 N
I i
Type III Series 1 Size Type of Material 1.
Process Pipe 4" NPS SA 376 TP304 0.551" WL 2.
Guard Pipe 8" NPS SA 106 Gr. B 0.500" WL 3.
Flurl Head SA 182-F304 Welds NDE Methods Used No. 1 PT and RT No. 2 PT and UT
7 TYPE III SERIES 1, 2, 3 AND 5 AND TYPES IV AND V e,
(These penetrations are all of the same design but differ in size and type of material)
Type III Series 2 Size Type of Material 1.
Process Pipe 8" NPS SA 376-TP304 0.906" WL
Flued Head SA 182-F304 Welds NDE Method Used No. 1 PT and RT No. 2 PT and UT Type III Series 3 Size Type of Material 1.
Process Pipe 14" 0.D.
SA 376-TP316 1.125" WL 2.
Guard Pipe 20" 0.D.
SA 106-Gr. C 1.750" WL 3.
Flued Head SA 162-F316 Welds NDE Method Used No. 1 PT and RT No. 2 PT and UT i
l
"I TYPE III SERIES 1, 2, 3 AND 5 AND TYPES IV AND V (These penetrations are all of the same design but differ in size and type of material)
Type III Series 5 Size Type of Material 1.
Process Pipe 12" NPS SA 376-TP316 1.125" WL 2.
Guard Pipe 18" NPS SA 106-Gr. B 1.562" WL 3.
Flued Head SA 182-F316 Welds NDE Method Used No. 1 PT and RT No. 2 PT and UT Type IV Size Type of Material 1.
Process Pipe 3/4" NPS SA 375-TP304 0.218" WL 2.
Guard P'ipe 6" NPS SA 106-Gr. B 0.432" WL 3.
Flued Head SA 105-Gr. II Welds NDE Method Used No. 1 PT and RT No. 2 PT and RT
TYPE III SERIES 1, 2, 3 AND 5 AND TYPES IV AND V (These penettations are all of the same design but differ in size and type of material)
Type V Size Type of Material 1.
Process Pipe-3/4" NPS SA 376-TP304 0.218" WL 2.
Guard Pipe-6" NPS SA 106-Gr. B 0.432" WL 3.
Flued Head SA 182-F316 Welds NDE Method Used No. 1 PT and RT No. 2 PT and RT 9
)
F-APPENDIX II: NDE AND REPAIRS OF MCGUIRE PENETRATIONS Welds in 22 penetrations were repaired as a result of NDE performed during construction.
3 welds repaired for incomplete penetration 1 weld repaired for crack 12 welds repaired for elongated indications (slag)
UT - 6 welds repaired type of defect unknown PT - None S
l
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