ML19331E436

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Responds to IE Bulletin 80-05, Vacuum Condition Resulting in Damage to Chemical Vol Control Sys (CVCS) Holdup Tanks. Containment Penetration Connections Are of Flued Head Design W/Containment Boundary Butt Welds
ML19331E436
Person / Time
Site: Satsop
Issue date: 07/15/1980
From: Renberger D
WASHINGTON PUBLIC POWER SUPPLY SYSTEM
To: Engelken R
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
References
G3-80-1732, GO3-80-1732, IEB-80-05, IEB-80-5, NUDOCS 8009100179
Download: ML19331E436 (2)


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5 P. O Box 968 3000 GEo. WASHINGTON W AY RICHLAND, WASHINGTON 99352 s [5 $ [ $.1611 July 15,1980 G03-80-1732 Docket Nos. 50-508 50-509 Mr. R. H. Engelken, Director U. S. Nuclear Regulatory Commission, Region IV 1900 North California Boulevard Walnut Creek Plaza, Suite 202 Walnut Creek, California 94596

Dear Mr. Engelken:

Subject:

WPPSS NUCLEAR PROJECTS NO. 3 AND 5 RESPONSE TO IE BULLETIN 80-08 The subject bulletin, " Examination of Containment Liner Penetration Welds" has been reviewed for application to the WNP-3/5 projects. Our response to the concern raised in the bulletin is as follows:

1) The WNP-3/5 containment penetration connections are of the flued head design with containment boundary butt welds between the penetration sleeve and process piping as illustrated in Figure NE 120-1, Winter,1975 addenda to the 1974, and later editions of the ASME Boiler and Pressure Vessel Code.

2a) The Supply System /Ebasco contract specifications invoke the 1977 edition, Summer,1978 addenda to the ASME Boiler and Pressure Vessel Code.

2b) 100% radiographic inspection will be performed on the subject butt welds at the WNP-3/5 containment penetration connections.

Where radiography is not practical or results are not conclusive, ultrasonic testing will be performed.

2c) The weld joint will be a butt weld with a consumable insert. The pipe material will be either carbon steel or nickel steel. Sizes range from 4-inch to 56-inches. Supply System /Ebasco installation criteria, Section 2A, Appendix C, " Design Criteria and Guides,"

in the technical provisions of the applicable specifi. cations do not permit the use of any backing rings on any ASME Class welds.

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2d) 'None of the subject containment penetration welds have been

_ performed as of this date'. Therefore, no nondestructive examination results are available and the need for repair has not been deter-mined.

'3) Radiography will be performed as noted in 2b above as the'construc-tion schedule dictates.

Very truly-yours,

/ l (QWI D.'L. RENBERGER

. Assistant Director, Technology bk cc: ' Mr. H. D. Thornburg, USNRC Mr. W. Woods, NUS Mr. N. S. Reynolds, D&L h

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