ML18025A573

Pennsylvania Power & Light'S 08/20/1975 Letter, Informing of Use of Subarticle NB-4600 of 1974 Edition of ASME B&PV Code,Section III, for Field Installation of Nuclear Service Piping, with Enumerated List of Exceptions

ML18025A573
Person / Time
Site:	Susquehanna
Issue date:	08/20/1975
From:	Curtis N Pennsylvania Power & Light Co
To:	Butler W Plant Licensing Branch 1
References
288, 840-2, 9173, ER 100450, PLA-79
Download: ML18025A573 (2)

Text

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g TWO NORTH NINTH STREET, ALLENTOWN, PA. 18101 PHONEs {215) 821-5151 August 20, 1975 Dr. Walter R. Butler, Chief Docket Nos. 50-387 Light Water Reactors Branch 1-2 50-388 Division of Reactor Licensing ~pwsgog b'le cy U.S. Nuclear Regulatory Commission Washington, D.C. 20555 SUSQUEHANNA STEA?I ELECTRXC STATXON AShS SECTION III - NB-4600 ER 100450 FILES 840-2 & 288 PLA-79

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Dear Dr. Butler:

/I; This is to inform you that for field installation of nuclear service piping subarticle NB-4600 of the 1974 edition of the ASME B&PV Code;Section XII will be used in leiu of subarticle NB-4600 of the 1971 edition of the ASHE B&PV Code,Section IIX, through the 1972 Addenda with the following exceptions and conditions:

1. All welding shall be done with low hydrogen electrodes.

2. Joints in materials of 3/4" to 1-1/2" thickness, even though less than 0.39$ C shall be preheated to minimum of 200 F when HBiT is omitted.

This 200o shall also be maintained. as a minimum interpass temperature.

3. For joints in materials of 3/4" to 1-1/2" thickness and greater than 0.3+ C, in addition to the 200OF minimum preheat temperature, a minimum 200 F interpass temperature shall 'be maintained.

The PSAR will be changed. in a later amendment.

Very truly yours, N, W. Curtis Vice President-Engineering and Construction 'g~ +p +

Sworn to and sucscribed before me this ~( ~l~~ of c~ c ~ 1975

~Notary Public My commission n

expires:Wry~~/6< /PpQ CTC:jan PENNSYLVANIA POWER IL L I GH T COMPANY 8178