ML19323E588

Submits Questions & Answers Received to Correctly Interpret Intent of Requirements of IE Bulletin 79-03A.Awaiting NRC Response to Remaining Questions

ML19323E588
Person / Time
Site:	FitzPatrick
Issue date:	04/24/1980
From:	Jacobs S STONE & WEBSTER ENGINEERING CORP.
To:	Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
IEB-79-03A, IEB-79-3A, NUDOCS 8005270015
Download: ML19323E588 (2)

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STONE 8 WEBSTER ENGINEERING CORPORATION 245 SUMMER STREET. BOSTON. M ASS ACHU SETTS ADDRESS ALL CORRESPONDENCE TO P.O. BOX 2329. ROSTON. M ASS. 02107 W. U. T E L Ex. 940001 N ORK NSTRUCTION

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U.S. Nuclear Regulatory Commission April 24, 1980 Region I 631 Park Avenue King of Prussia, PA 19406 Attention Mr. Boyce H. Crier Director Gentlemen:

IE BULLETIN No.79-03A In order to be confident that we are correctly interpreting the intent and requirements of the subject IE Bulletin, several questions were asked of USNRC's Mr. Tripp by Stone & Webster Engineering Corporation personnel Messrs. F.

Sestak, L.D. Nace, F. Baldwin and R. Tschirch. The questions and the answers received to date are as follows:

Regarding Item 1 under " Revised action to be taken by Licensees and Permit Holders"

1. We interpret this to mean that the design stress which must not exceed 85 percent of the Code allowable stress is the stress which is due only

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to internal design pressure. Is this correct?

USNRC reply by Mr. Walton: Yes

2. May the Design Stress-Intensity Values, Sm which are given in Table I-1.2 of ASME III be used for Code Class 1 piping for plants constructed in ac-cordance with ASME III? .

USNRC reply: No reply as of 4-24-80

3. Table I-7.2 of ASME III gives allowable stresses for SA312 for Code Classes 2 and 3. Footnote 3 of this table gives a joint efficiency factor of 0.80 for single welded material which is not examined in accordance with NC-2550. l j

The 0.80 factor is already more conservative than the 85 percent requirement 1 of IE 79-03A. We believe the 0.80 factor meets the intent of IE 79-03A  !

and that it should not be necessary to apply the 85 percent to 80 percent of the tabulated allowable stress values for Class 3 SA312 welded pipe which is not examined in accordance with NC-2550. Is this interpretation correct?

USNRC reply by Mr. Walton: Yes avob n a O/S &

USNRC 2

4. For plants constructed in accordance with ANSI B31.7, may the design stress-intensity values given in Table A.1 be used for Code Class 1 piping?

USNRC reply: No reply as of 4-24-80

5. We intend to use the allowables in Table A.8 for Code Classes 2 and 3 B31.7 piping. Is this acceptable?

USNRC reply: No reply as of 4-24-80

6. For plants constructed in accordance with ANSI B31.1 and Code Cases N-1 through N-13 we intend to use the allowables given in Code Case N-7. Is this acceptable?

USNRC reply: No reply as of 4-24-80

7. For plants constructed in accordance with the 1967 Edition of ANSI B31.1, we intend to use the tabulated allowable stress values given in Table A-1 for welded A312 pipe without applying the 85 percent requirement of IE 79-03A since these tabulated values already include a joint efficiency factor of 0.85. Is this acceptable?

USNRC reply by Mr. Walton: Yes Regarding Item 3 under " Revised action to be taken by Licensees and Permit Holders"

8. Is etch testing required to be performed on material which meets the 85 percent of Code allowable stress criteria of Item 17 USNRC reply by Mr. Tripp: No Your assistance is appreciated and we look forward to receiving your early response to the remaining unanswered questions.

Very truly yours, f(g3 S. B. Jacobs Chief Licensing Engineer RT:KF 1

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