ML20134B494

Informs That Test Data Being Prepared to Demonstrate That Exposure of Low Hydrogen Electrodes for 10 H to Atmosphere Adequate to Prevent hydrogen-induced Cracking in Welding Production,Per .Interim Measure Implemented

ML20134B494
Person / Time
Site:	05000000, Palo Verde
Issue date:	02/28/1978
From:	Van Brunt E ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR
To:	Engelken R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V)
Shared Package
ML17198A269	List: IR 05000335/1978013 IR 05000389/1974001 IR 05000389/1975001 IR 05000389/1975002 IR 05000389/1975003 IR 05000389/1975004 IR 05000389/1975005 IR 05000389/1976001 IR 05000389/1976002 IR 05000389/1976003 IR 05000528/1974002 IR 05000528/1975001 IR 05000528/1976001 IR 05000528/1976003 IR 05000528/1976004 IR 05000528/1977003 IR 05000528/1977004 IR 05000528/1978001 IR 05000528/1978002 L-75-187, Requests Encl Portion of Insp Rept 50-389/75-01 Be Withheld from Public Disclosure.Previous Ltr Should Be Disregarded.W/O Encl L-76-328, Informs That Insp Rept 50-389/76-01 Contains No Proprietary Info L-76-397, Informs That Insp Rept 50-389/76-02 Contains No Proprietary Info L-78-288, Advises That FSAR & Environ Rept Submittal Date Revised to Mar 1980 Due to Reduction in Const Schedule ML20132B481 ML20132C157 ML20134A387 ML20134A397 ML20134A403 ML20134A440 ML20134A478 ML20134A491 ML20134A501 ML20134A520 ML20134A530 ML20134A536 ML20134A561 ML20134A568 ML20134A579 ML20134A591 ML20134A594 ML20134A596 ML20134A601 ML20134A603 ML20134A608 ML20134A616 ML20134A619 ML20134A623 ML20134A626 ML20134A629 ML20134A633 ... further results
References
FOIA-84-293 ANPP-10423-JAR, NUDOCS 8508150645
Download: ML20134B494 (1)

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?,g ATTZ1GSA g(js EdE123D 5ErJirJf62C:E CO3 EPM]?f P. O. Bo x 216 6 6 PHOENIX ARIZONA 85o36 February 28, 1978 ANPP-10423-JAR s

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U. S. Nuclear Regulatory Commission

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T Region V D

1990 North California Boulevard f

g[4 Walnut Creek Plaza - Suite 202 Walnut Creek, California 94596 y

Attention:

Mr. R. H. Engelken Director, Region V Subj ect:

Control of Low Hydrogen, Covered, Arc-Welding Electrodes File:

78-056-026

Reference:

Letter R. H. Engelken to E. E. Van Brunt, Jr., dated February 15, 1978, Same Subject

Dear Sir:

In response to the referenced letter wherein you have requested that Arizona Public Service Company implement AWS weld rod control re-quirements on all Quality Class Q including ASME Section III, Division 1, code welding.

Arizona Public Service Company does not agree that 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> out of oven time is required for adequate moisture control of low hydrogen, covered, electrodes to insure proper welding of P1 steels.

Consequently, we are preparing test data that will demonstrate that an exposure of low hy-drogen, covered, electrodes to the atmosphere for 10 hours1.157407e-4 days <br />0.00278 hours <br />1.653439e-5 weeks <br />3.805e-6 months <br /> is more than adequate to prevent hydrogen induced cracking in production welding.

We plan to present this test data to NRC Headquarters as soon as the data is available.

As an interim measure, Arizona Public Service Company has instructed Bechtel to initiate a maximum of 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> exposure to the atmosphere as moisture control of low hydrogen, covered, arc-welding electrodes as stated in AWS D1.1-1972 for all Quality Class Q welding except for the welding of the containment liner plate system where we will restrict the exposure to 415 hours0.0048 days <br />0.115 hours <br />6.861772e-4 weeks <br />1.579075e-4 months <br />.

In addition, this control will not be imposed on stainless steel alloys or machine welding processes.

Full compliance will be accomplished no later than March 6, 1978.

Very truly yours g

hB1 5 B50703 W

hM E. E. Van Brunt, Jr.

LEICHTO84-293 PDR APS Vice President Construction Projects ANPP Project Director h[$$DN EEVBJr/ JAR:ske Si cc:

A. C. Gehr