ML19320B359
| ML19320B359 | |
| Person / Time | |
|---|---|
| Site: | Calvert Cliffs  |
| Issue date: | 07/03/1980 |
| From: | Lundvall A BALTIMORE GAS & ELECTRIC CO. |
| To: | Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| IEB-80-08, IEB-80-8, NUDOCS 8007100228 | |
| Download: ML19320B359 (5) | |
Text
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t B ALTIMORE G AS AND ELECTRIC COMP ANY P.O. BOX 14 7 5 B ALTIM O R E. M A R YL AN D 2120 3 AmTMun C. LuN ovALL,JR.
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- sven, July 3, 1980 Mr. Boyce H. Grier, Director U.S. Nuclear Regulatory Commission Region I 631 Park Avenue King of Prussia, PA 19406
SUBJECT:
" Examination of Containment Liner Penetration Welds" Calvert Cliffs Nuclear Power Plant Unit Nos. 1 and 2 Baltinore Gas and Electric Company Docket Nos. 50-317 50-318
Dear Mr. Grier:
IE Bulletin No. 80-08 requested information concerning flued head design penetration connections, or other designs with containment boundary butt welds between the penetration sleeve and process piping.
Calvert Cliffs Units 1 and 2 each contain five (5) such penetrations, all of them flued head design. These penetrations were "N" stamped to the requirements of paragraph N-153 of ASME Code Section III Summer 1969, as required by Code Case No. 1425. To meet volumetric examination requirements during con-struction, one of the ten penetration welds was radiographed. The re-maining nine were examined using ultrasonics. No backing rings or con-sumable inserts were used on any of the welds in question.
Results of nondestructive examinations performed during construction, material data, and weld sizes are tabulated below.
Ultrasonic examinations were per-formed because of the difficulty in obtaining a meaningful radiograph of the flued head-to-penetration sleeve weld.
FLUED HEAD-TO-PENETRATION SLEEVE WELDS f
CALVERT CLIFFS UNIT 1 c!
Penetration 41: Shutdown Cooling 14" SCH. 140 A-376 TP 316 l
Pipe Dia:
24" Joint Thickness: 0.625"
\\
l Type:
Flued Head 0
Material: ASTM A-516 GR.70 to SA-182 TP F316 (O.,
t 80 0 710 0 2.: lib
1 E,,
FLUED HEAD-TO-PENETRATION SLEEVE WELDS (CONTINUED)
CALVERT CLIFFS UNIT 1 Penetration 41:
(Continued)
Weld:
Coating E309-16 Bare ER 309 Backing Bar or Insert U5ed: No NDE:
VT, DT, and UT Accepted Code Inspector Hold Point for UT 3
Penetration 33: Feedwater 16" SCH.80 A-106 GR.C Pipe Dia: 28" Joint Thickness: 0.750" Type:
Flued Head Material: ASTM A-516 GR.70 to SA-105 GR.II Weld:
Coating E 7018 Bare.E.705-2 Backing Bar of Insert Used:
No NDE:
VT, PT, and UT Accepted, Code Inspector Hold Point for VT Penetration 34: Feedwater 16" SCH.80 A-106 GR.C Pipe Dia:
28" Joint Thickness: 0.750" Type:
Flued Head Material : ASTM A-516 GR.70 to SA-105 GR.II Weld:
Coating E 7018 Bare E 70S-2 Backing Bar or Insert Used:
No NDE:
VT, PT, and UT Accepted, Code Inspector Hold Point for VT t
Penetration 35: Main Steam 34", 0.95" min. A-155 GR.KC-F 70 Pipe Dia:
50" Joint Thickness:
1.5" Type:
Flued Head Material : ASTM A-516 GR.70 to SA 105 GR.II Weld:
Coating E 7018 Bare E 705-2 Backing Bar or Insert Used:
No NDE:
VT, PT, and UT Accepted Code Inspector Hold Point for VT 3
Penetration 36: Main Steam 34", 0.95" min A-155 GR.KC-F 70 Pipe Dia: 50" Joint Thickness:
1.5" Type:
Flued Head Material:' ASTM A-516 GR.70 to SA 105 GR.II Ueld:
Coating E 7018 Bare E 70S-2 Backing Bar or Insert Used:
No NDE:
VT and RT Accepted, Code Inspector Hold Point for VT and RT
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FLUED HEAD-TO-PENETRATION SLEEVE WELDS (CONTINUED)
CALVERT CLIFFS UNIT 2 Penetration 41:
Shutdown Cooling 14" SCH.140 A-376 TP 316 Pipe Dia: 24" Joint Thickness: 0.625" Type:
Flued Head flaterial:
ASTM A-516 GR.70 to SA-182 TP-F 316 Weld:
Coating E 309-16 Bare ER 309 Backing Bar or Insert Used:
No NDE:
VT, PT, and UT Accepted Penetration 33:
Feedwater 16" SCH.80 A-106 GR.C Pipe Dia:
28" Joint Thickness: 0.750" Type:
Flued Head liaterial :
ASTM A-516 GR.70 to SA-105 GR.II Held:
Coating E 7018 Bare E 70S-2 Backing Bar or Insert Used:
No NDE:
VT, MT, and UT UT Rejected Code Inspector Hold Point for VT and UT 4 Indications Noted - 1 Rejected Area (1):
Sk" to 7h" CCW from 0,17h" from wall, 3/8" deep, rejected.
Area (2): 21" to 23" CCW from 0,gl7h" from n11, 3/8" deep.
Area (3): 25h" to 27h" CC1 from 0,174" from wall, 3/8" deep.
Area (4):
10" to 11h" CW from 0,17" from wall, 4" deep.
Weld Repair No.1 NDE:
VT, MT, and UT-Code Inspector Hold Point for UT UT Rejected Area (1)
Area (1): Linear Indication 6h" to 7 3/4" CCW from 0,17h" from wall, h" deep.
Previous Areas (2), (3), and (4) Accepted Held Repair No. 2 NDE: VT, MT, and UT Accepted, Code Inspector Hold Point for VT Penetration 34: Feedwater 16" SCH.80 A-106 GR.C Pipe Dia:
28" Joint Thickness:
0.75" Type:
Flued Head Material: ASTM A-516 GR.70 to SA-105 GR.II Weld:
Coating E 7018 Bare E 70S-2 Backing Bar or Insert Used:
No NDE:
VT, MT, and UT UT Rejected 1 Area Area (1): Linear Indication ik" above to 3/4" below center of longitudinal weld on south side of penetration, 17 3/8" from wall, h" deep.
'! eld Repair No.1 NDE:
VT, MT, and UT Accepte4 Code Inspector Hold Point for VT and UT
-4 g'.
FLUED HEAD-TO-PEllETRATION SLEEVE UELDS (CONT!!1UED)
CALVERT CLIFFS UNIT 2 Penetration 35: itain Steam 34", 0.95" min. A-155 GR.KC-F 70 Pipe Dia:
50" Joint Thickness: 1h" Type:'
Flued Head Material: ASTM A 516 GR.7J to SA-105 GR.II Held:
Coating E 7018 Bare E 705-2 Backing Bar or Insert Used:
No NDE:
V7, PT, NT, and UT U' teiected 2 Areas 0
Area (1):
I-
.ndication 64" to 8h" CCW from 0, 8" from ap, 1" deep g
Area (2): L
- ' ' ation 39h" to 41h" CW from 0, Sh" from fact
,, 7/8" deco.
Weld Reoair No.1 NDE: VT, PT, MT, and UT Accepted, Code Inspector Hold Point for VT Penetration 36: Main Steam 34", 0.95" min. A-155 GR.KC-F 70 Pipe Dia:
50" Joint Thickness:
1h" Type:
Flued Head Material : ASTM A 516 GR.70 to SA-105 GR.II Weld:
Coating E 7018 Bare E 70S-2 Backing Bar or Insert Used:
No NDE:
VT, MT, and UT Accepted, Code Inspector Hold Point for VT Ultrasonic examination provided a highly reliable and meaningful examination technique. This technique was further enhanced by the fact that no backing bars were used during the fabrication of the welds.
A radiographic examina-tion of these welds would not be practical nor would it provide additional infomation on the integrity of the welds.
Should you hz any questic,s on the contents of this report, please do not hesitate to contact us.
Very truly yoursfl
/
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-A. E. Lundval., Jr.
Vice President-Supply AEL/BCR/gla cc: Mr. Harold Thornburg, Director U.S. Nuclear r..-;ulato y Commission Division of Reactor Construction Inspection Washington, DC 20555
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R. H. Kent J. A. Tiernan R. M. Douglass (2)
R. F. Ash
.R. E. Denton Originator J. A. Biddison G. F. Trowbridge E. L. Conner, Jr.
R. Sanacore J. T. Carroll R.C.L. Olson General Supervisor of Operations File 4
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