ML17298A704
| ML17298A704 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 12/14/1983 |
| From: | Van Brunt E ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR |
| To: | Knighton G Office of Nuclear Reactor Regulation |
| References | |
| ANPP-28438-WFO, NUDOCS 8312160169 | |
| Download: ML17298A704 (9) | |
Text
REGULATOR NFORNATION DISTRIBUTION TEN (RIDS)
ACCESSION NBR+ 8312160169 DOC ~ DATE! 83/12/14 NOTARI'ZEO; YES DOCKET FIlCILgSTN.50 528 Palo Verde Nuclear Station~
Unit ii 'Arizona Publi 05000528
'STN~50~529 Palo Verde Nuclear Station~
Unit 2i Arizona Publi 05000529 STN.50 530 Palo Verde Nuclear Station<
Uni,t 3g Arizona Pub'ji 05000530 AUTHohlANE AUTHOR AFFILIATION VAN BRUNTqK,E Arizona Public Service Cog REC IP NAME.
RECIPIENT AFFILIATION KNIGHTONgG ~
Licensing Branch 3
SUBJECT! Forwards draft rev to FSAR Section-3A ~ 10>>re structural welding code; ANS Di ~ 1~72 ~
DISTRIBUTION CODEo 8001S
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/'ITLEj
'Licensing Submittal!
PSAR/FSAR Amdts L Related Cor respondence NOTES!Stander dized plant ~
'Stander dized pl-ant.
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Arizona Public Service Company P.O. SOX 21666
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PHOENIX. ARIZONA 85036 December 14, 1983 ANPP 28438-WFO/MSN Director of Nuclear Reactor Regulation Attention:
Mr. George Knighton, Chief Licensing Branch No.
3 Division of Licensing U.S. Nuclear Regulatory Commission Washington, D.C.
20555
Subject:
Palo Verde Nuclear Generating Station (PVNGS)
Units 1, 2 and 3
Docket Nos. STN-50-528/529/530 File:
83-056-026'.l.01.10
Reference:
APS letter from E. E.
Van Brunt, Jr. to G.
W. Knighton (NRC), dated ll/16/83
Dear Mr. Knighton:
A telephone conference call was held on November 9,
1983 between APS personnel and E.
A. Licitra and Dave Smith of your staff to discuss an exception taken in FSAR Section 3.8.1.6.6.1 to Structural Welding Code AWS D1.1-72.
Justification had been provided in FSAR Section 3A.10 for the exception taken to AWS D1.1-72, Table 4.2.
It was agreed that additional information would be provided in FSAR Section 3A.10 to allay your concerns.
The referenced letter stated that a draft revision of FSAR Section 3A.10 (Paragraph I.D) would be transmitted for your review by December 16, 1983.
This information is attached for your review.
If you have any questions regarding this matter, please contact me.
a~gggb016 050O05 esggf 4
@pe ADQCW pDR EEVB/MSN/dh Attachment Very truly yours, AU.L E. E.
Van Brunt, Jr.
APS Vice President Nuclear Projects Management ANPP Project Director cc:
E. A. Licitra (w/a)
A.
C.
Gehr (w/a)
QOOIt 1(y
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P I
STATE OF ARIZONA ")
) ss.
COUNTY OF MARICOPA)
I, Edwin E.
Van Brunt, Jr.,
represent that I am Vice President, Nuclear Projects of Arizona Public Service
- Company, that the foregoing document has been signed by me on behalf of Arizona Public Service Company with full authority to do so, that I have read such document and know its
- contents, and that to the best of my knowledge and belief, the statements made therein are true.
Edwin E.
Van Brunt, Jr.
Sworn to before me thfs~/g day of
, 1983.
otary Public,," -,>
My Commission Expires:
MyCommhdon hplres ApN 6, 198?
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ATTACHMENT I',
,Draft Revision of PSAR Section 3A.10 (Paragraph I.D)
Draft revision to justification provided in FSAR Section 3A.10, Paragraph I.D.
Justification:
The preheat for fillet'elds is based on the weld throat dimension, and the justification is based on the following engineering analysis:
1)
The structural steels used at PVNGS which utilize the fillet weld throat approach to preheating are plain carbon steels (principally A36 and A500) and are essentially nonhardenable.
Preheat is important for plain
- carbon, nonhardenable steels to counteract high restraint and shrinkage strains.
The fillet welds at
'PVNGS are not considered to be highly restrained.
Since the shrinkage strain is proportional to the weld throat, it is a rational basis for preheating.
This fillet weld throat approach to preheating is not used for high strength or alloy steels.
High strength and alloy steels used at PVNGS are governed by other codes and specifications.
2)
The principal welding filler metal used for the structural steel is
- E7018, which produces a
tough ductile deposit and has minimal preheat requirements due to its low hydrogen characteristic.
The NRC has reviewed and approved a
test report from
- PVNGS, qualification of an alternativ'e electrode control program for AWS Dl.l (including the electrode control procedure WFMC-1/Revision 6),
dated March 15,
- 1978, which reported on the control of E7018 electrodes.
The test coupons used in that program were welded without preheat.
Several coupons were one inch thick circular patch tests which represent the maximum restraint.
As the circular patch test coupons welded without preheat were acceptable, fillet welding without preheat is justifiable.
In addition to these tests, numerous other procedure qualification test coupons have been welded without preheat.
Any of these tests can serve to qualify deviations from the requirements of AWS Dl.l, Table 4.2.
3)
The inspection requirements of AWS Dl.l are supplemented with nonMestructive examinations as appropriate to the design and function of the components.
, gyral S
J