ML17297A961
| ML17297A961 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 10/16/1981 |
| From: | Van Brunt E ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR |
| To: | Tedesco R Office of Nuclear Reactor Regulation |
| References | |
| ANPP-19181---JM, NUDOCS 8110280250 | |
| Download: ML17297A961 (10) | |
Text
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ACCESSIOV>> !VBR + 8110280250, DOC, DATE>>: 81/10/46 NOTARIZED;'ES FACIL>>:STN-50-528 Palo Id>>er de Nuclear StationP Unit 1P Arizona Publi Sl'N-50-529 Palo verde IVuclear StationP Unit 2P Arizona Publi STN-50 530 Palo verde Nuclear Stationi Unit 3P Arizona Publi AUTrl>>,NAME; AUTHOR A F F ILIAT'ION VAN 3RUV>>TP Kr, E ~
Arizona Pub l i c Ser vi ce Co ~
RECIP+ VAvl-I RECliPZKNT AFFIL>>IATIOVi TEDESCO R ~ Lr, Assi stant Dir ector>> for Liicensing
SUBJECT:
- Forwards revised response to 810902 1tr for Mechhnical>>
Engineering Branch Item 48'til concurs w/acceptance, erg teriia for>> steady-state vibr ation on Class'r O'
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wmmi acr mmmwnma axsmmmr P.o. BOX 21666 PHOENIX, ARIZONA65036 October 16, 1981 ANPP-19181 JMA/KEJ Mr. R. L. Tedesco Assistant Director for Licensing Division of Licensing Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Washington, D.C.
20555
Subject:
I
Reference:
eg It'[g
'672 7 196Ia 9
Palo Verde Nuclear Generating Stain u 5 ~Iu6IIuuI3>
(PVNGS) Units 1, 2 and 3
Docket Nos.
STN-50-528/529/530 File:
81-056-026; G.1.10 K5~
~I%
Letter from E.
E. Van Brunt, Jr.,
APS to R. L. Tedesco (ANPP-18840) dated September 2,
1981
Dear Mr. Tedesco:
Please find attached a revision to our response to the referenced letter for MEB Item 48.
NRC requested, in a working meeting held on "July 14-16, 1981, that APS commit to NRC's acceptance criteria for steady state vibration on Class 1,
2 and 3 piping and high energy steam and feedwater piping.
APS has concurred with that acceptance criteria.
Very truly yours, E.
E. Van B nt, Jr.
APS Vice President, Nuclear Projects ANPP Project Director EEVBJr/KEJ/av Attachment cc:
J. Kerrigan (w/a)
P. Hourihan (w/a)
A. C. Gehr (w/a)
D. Terao (NRC/MEB) (w/a) pool I t 8ii0280250 SiiOih'DR ADOCK 05000528 A,
P~DR
I I'
STATE OF ARIZONA
)
)
as'OUNTY OF MARICOPA)
I, John M. Allen, represent that I am Nuclear Engineering Manager of Arizona Public Service Company, that the foregoing document has been signed by me for Edwin E. Van Brunt, Jr., Vice President Nuclear Projects, on behalf of Arizona Public Service Company with full authority so to do, 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.
j,u3 John M. Allen
~,'-'worn to before me this~~Nday of c-r 1981.
Notary Public My Commission expires:
~ y III
PVNGS FSAR APPENDIX 14B identical piping and will provide meaningful and significant..results.
The remainder of the high and moderate energy piping will be visually in-spected by an engineer (quality'ed per 14.2.2.9.1).
4.0 ACCEPTANCE CRITERIA
/HN4 ~
The acceptance criteria for thermal expansion shall ensure sufficient clearance has been provided to allow free and unrestricted thermal expansion of essential plant piping and components.
Where thermal deflection tg is measured, the deflections shall be compared to the stress analysis of the piping system.
The acceptability of steady state vibration of piping, components, and supports shall be based on observa-tions by an engineer (qualified per 14.2.2.9.1).
Should significant vibrations occur, an engineering evaluation on syste ntegrity shall be made, with determination to acce s is or to
'f the s Dynamic effects acceptance criteria will be provided for those piping systems where significant transient behavior is antics.pated.
Measured displacements, pressures, and temperatures shall be compared to those derived by the stress analysis.
Should any abnormalities occur while operationally testing piping systems which are not instrumented, those piping systems shall be checked for any indica-tions of structural damage.
An engineering determina-tion shall be made as to the cause of the abnormality and its effect on structural integrity. If it is determined that structural integrity will be degraded below an acceptable level, corrective actions shall be taken, and appropriate retesting accomplished.
August 1981 14B-20C Amendment S
Shall be made by analyzing the displacement amplitudes and corresponding stress levels to the acceptance criteria.
The acceptance criteria for steady state vibration shall be that the maximum measured amplitude shall not induce a stress in the piping system greater than one half the endurance limit at 10 stress cycles as defined in section IIX of the ASME Boiler and Pressure Vessel Code.
l