ML20127L727
| ML20127L727 | |
| Person / Time | |
|---|---|
| Site: | Vogtle  |
| Issue date: | 06/19/1985 |
| From: | Bailey J GEORGIA POWER CO. |
| To: | Adensam E Office of Nuclear Reactor Regulation |
| References | |
| GN-645, NUDOCS 8506280105 | |
| Download: ML20127L727 (3) | |
Text
.%
Georgia Power Company 2
x Waynesboro, Georgia 30830
"*EsN Vogtle Project
' June 19, 1985 Director of Nuclear Reactor Regulation File: X7BC35 Attention: Ms Elinor G. Adensam, Chief Log: GN-645 Licensing Branch #4 Division of Licensing U. S. Nuclear Regulatory Commission Washington, D.C.
20555 NRC DOCKET NUMBERS 50-424 AND 50-425 CONSTRUCTION PERMIT NUMBERS CPPR-108 AND CPPR-109 V0GTLE ELECTRIC GENERATING PLANT - UNITS 1 AND 2 REQUEST FOR ADDITIONAL INFORMATION: RESPONSE TO 0210.40
Dear Mr. Denton:
As a result of a telephone conversation with members of your staff on June 18, 1985, the attached change has been made to the subject question.
This change will be incorporated in FSAR Amendment 17 presently scheduled for July,1985.
If you staff requires any additional information, please do not hesitate to contact me.
Sincerely, 4
J. A. Bailey Project Licensing Manager JAB:js Enclosure cc:
D. O. Foster R. A. Thomas J. E. Joiner, Esquire B. W. Churchill, Esquire M. A. Miller B. Jones, Esquire
// SOi L. T. Gucwa (7
(
'i G. Bockhold, Jr.
H. H. Gregory, III T. Johnson D. C. Teper L. Fowler 8506200105 850619 PDR ADOCK0500g4 Vogtle Project File A
F Question 210.40 Provide a summary of how piping vibration amplitudes measured during preoperational tests will be related to a stress level.
In addition, clarify what is meant by the " endurance limit as defined in the ASME Code,Section III."
Response
A vibration monitoring program will be conducted at VEGP prior to plant startup.
The program will include the appropriate safety-related instrument lines, up to the first anchor, and will be based upon the guidance provided in ANSI /ASME OM3 for relating measured vibration levels to stress levels.
The endurance limit is defined as the value of the alternating stress at one million cycles.
For stead state vibration, the maximum calculated alternating stress intensity alt shall be limited as defined below:
(a) For ASME Class 1 piping systems:
M< bel Salt = C K22
'~ oc Z
where C2 secondary stress index as defined in the ASME Code
=
allowable stress reduction factor:
1.3 for materials covered oc
=
by Fig. I-9.1: or 1.0 for materials covered by Fig.
I-9.2.1 or I-9.2.2 of the ASME Code K2 local stress index as defined in the ASME Code
=
maximum zero to peak dynamic moment loading due to vibration M
=
only, or in combination with other loads as required by the system Design Specification Sel 0.8 A where SA is S
the 9 ternating stress at 106 cycles from 1
=
Fig. I-9.1; or SA at 100 cycles from Fig. I-9.2.2 of the ASME Code.
The user shall consider the influence of temperature on the Modules of Elasticity Z
section modules of the pipe
=
y (b) For ASME Class 2 and 3 piping, ANSI B31:
M< bel Salt = C K22 Z
W where CK22 21
=
i stress intensification factor, as defined in Subsection NC
=
and ND of the ASME Code or B31 If significant vibration levels are detected during the test program which had not been previously considered in the piping system analysis, consideration should be given to modifying the Design Specification to reverify applicable code conformance.
a i
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